I have a project using an LPC1768. This project has a requirement for 7
UART's, so I used three UART's on the LPC1768 and added two
SC16IS752's, which are dual UART's with selectable I2C or SPI
interface. I allocated SSP0 to one of the DUART's and SSP1 to the other.
Each DUART has an IRQ line and I ran these back to separate EINT pins. Running
the DUART's on separate SSP ports with separate interrupt pins will allow
straight forward interrupt handling for each DUART.
In addition, there is a display, with serial interface and a serial flash memory
part. I tied both of these parts to the SPI port. Neither the display nor the
serial flash will be accessed during interrupts.
While writing the low level driver modules for the SSP and SPI ports, I noticed
this note in the rev 2 LPC17xx user manual:
Remark: SSP0 is intended to be used as an alternative for the SPI interface,
which is included as a legacy peripheral. Only one of these peripherals can be
used at the any one time.
This is odd since both SSP ports and the SPI port can get their I/O lines out at
the same time and all have separate interrupt inputs to the NVIC, etc. I
referred back to the LPC23xx user manual and there is no limitation noted on
using these ports at the same time.
I have an LPCXpresso 1769 board and since I have the drivers written, I am going
to test this out on actual hardware. However, I was wondering if anyone had any
experience utilizing both SSP ports and the SPI port on an LPC1700 device? Did
it work? Since it supposedly works on LPC2300 devices, what is the problem with
it on LPC1700 devices?
Lastly, I realize that there are options available to me to resolve this issue,
but that is another discussion.
Jeff
Simultaneous use of SSP and SPI ports on LPC1700
Started by ●May 4, 2012
Reply by ●May 4, 20122012-05-04
Hi:
In the LPC2300, the SPI and SSP0 share the same interrupt vector.
Regards,
Alex
--- In l..., "ksdoubleshooter" wrote:
>
> I have a project using an LPC1768. This project has a requirement for 7 UART's, so I used three UART's on the LPC1768 and added two SC16IS752's, which are dual UART's with selectable I2C or SPI interface. I allocated SSP0 to one of the DUART's and SSP1 to the other. Each DUART has an IRQ line and I ran these back to separate EINT pins. Running the DUART's on separate SSP ports with separate interrupt pins will allow straight forward interrupt handling for each DUART.
>
> In addition, there is a display, with serial interface and a serial flash memory part. I tied both of these parts to the SPI port. Neither the display nor the serial flash will be accessed during interrupts.
>
> While writing the low level driver modules for the SSP and SPI ports, I noticed this note in the rev 2 LPC17xx user manual:
>
> Remark: SSP0 is intended to be used as an alternative for the SPI interface, which is included as a legacy peripheral. Only one of these peripherals can be used at the any one time.
>
> This is odd since both SSP ports and the SPI port can get their I/O lines out at the same time and all have separate interrupt inputs to the NVIC, etc. I referred back to the LPC23xx user manual and there is no limitation noted on using these ports at the same time.
>
> I have an LPCXpresso 1769 board and since I have the drivers written, I am going to test this out on actual hardware. However, I was wondering if anyone had any experience utilizing both SSP ports and the SPI port on an LPC1700 device? Did it work? Since it supposedly works on LPC2300 devices, what is the problem with it on LPC1700 devices?
>
> Lastly, I realize that there are options available to me to resolve this issue, but that is another discussion.
>
> Jeff
>
In the LPC2300, the SPI and SSP0 share the same interrupt vector.
Regards,
Alex
--- In l..., "ksdoubleshooter" wrote:
>
> I have a project using an LPC1768. This project has a requirement for 7 UART's, so I used three UART's on the LPC1768 and added two SC16IS752's, which are dual UART's with selectable I2C or SPI interface. I allocated SSP0 to one of the DUART's and SSP1 to the other. Each DUART has an IRQ line and I ran these back to separate EINT pins. Running the DUART's on separate SSP ports with separate interrupt pins will allow straight forward interrupt handling for each DUART.
>
> In addition, there is a display, with serial interface and a serial flash memory part. I tied both of these parts to the SPI port. Neither the display nor the serial flash will be accessed during interrupts.
>
> While writing the low level driver modules for the SSP and SPI ports, I noticed this note in the rev 2 LPC17xx user manual:
>
> Remark: SSP0 is intended to be used as an alternative for the SPI interface, which is included as a legacy peripheral. Only one of these peripherals can be used at the any one time.
>
> This is odd since both SSP ports and the SPI port can get their I/O lines out at the same time and all have separate interrupt inputs to the NVIC, etc. I referred back to the LPC23xx user manual and there is no limitation noted on using these ports at the same time.
>
> I have an LPCXpresso 1769 board and since I have the drivers written, I am going to test this out on actual hardware. However, I was wondering if anyone had any experience utilizing both SSP ports and the SPI port on an LPC1700 device? Did it work? Since it supposedly works on LPC2300 devices, what is the problem with it on LPC1700 devices?
>
> Lastly, I realize that there are options available to me to resolve this issue, but that is another discussion.
>
> Jeff
>
Reply by ●May 4, 20122012-05-04
Indeed they do. However, they all have separate inputs to the NVIC on LPC1700
devices.
Jeff
--- In l..., "alexander_ribero" wrote:
>
> Hi:
>
> In the LPC2300, the SPI and SSP0 share the same interrupt vector.
>
> Regards,
>
> Alex
>
> --- In l..., "ksdoubleshooter" wrote:
> >
> > I have a project using an LPC1768. This project has a requirement for 7 UART's, so I used three UART's on the LPC1768 and added two SC16IS752's, which are dual UART's with selectable I2C or SPI interface. I allocated SSP0 to one of the DUART's and SSP1 to the other. Each DUART has an IRQ line and I ran these back to separate EINT pins. Running the DUART's on separate SSP ports with separate interrupt pins will allow straight forward interrupt handling for each DUART.
> >
> > In addition, there is a display, with serial interface and a serial flash memory part. I tied both of these parts to the SPI port. Neither the display nor the serial flash will be accessed during interrupts.
> >
> > While writing the low level driver modules for the SSP and SPI ports, I noticed this note in the rev 2 LPC17xx user manual:
> >
> > Remark: SSP0 is intended to be used as an alternative for the SPI interface, which is included as a legacy peripheral. Only one of these peripherals can be used at the any one time.
> >
> > This is odd since both SSP ports and the SPI port can get their I/O lines out at the same time and all have separate interrupt inputs to the NVIC, etc. I referred back to the LPC23xx user manual and there is no limitation noted on using these ports at the same time.
> >
> > I have an LPCXpresso 1769 board and since I have the drivers written, I am going to test this out on actual hardware. However, I was wondering if anyone had any experience utilizing both SSP ports and the SPI port on an LPC1700 device? Did it work? Since it supposedly works on LPC2300 devices, what is the problem with it on LPC1700 devices?
> >
> > Lastly, I realize that there are options available to me to resolve this issue, but that is another discussion.
> >
> > Jeff
>
Jeff
--- In l..., "alexander_ribero" wrote:
>
> Hi:
>
> In the LPC2300, the SPI and SSP0 share the same interrupt vector.
>
> Regards,
>
> Alex
>
> --- In l..., "ksdoubleshooter" wrote:
> >
> > I have a project using an LPC1768. This project has a requirement for 7 UART's, so I used three UART's on the LPC1768 and added two SC16IS752's, which are dual UART's with selectable I2C or SPI interface. I allocated SSP0 to one of the DUART's and SSP1 to the other. Each DUART has an IRQ line and I ran these back to separate EINT pins. Running the DUART's on separate SSP ports with separate interrupt pins will allow straight forward interrupt handling for each DUART.
> >
> > In addition, there is a display, with serial interface and a serial flash memory part. I tied both of these parts to the SPI port. Neither the display nor the serial flash will be accessed during interrupts.
> >
> > While writing the low level driver modules for the SSP and SPI ports, I noticed this note in the rev 2 LPC17xx user manual:
> >
> > Remark: SSP0 is intended to be used as an alternative for the SPI interface, which is included as a legacy peripheral. Only one of these peripherals can be used at the any one time.
> >
> > This is odd since both SSP ports and the SPI port can get their I/O lines out at the same time and all have separate interrupt inputs to the NVIC, etc. I referred back to the LPC23xx user manual and there is no limitation noted on using these ports at the same time.
> >
> > I have an LPCXpresso 1769 board and since I have the drivers written, I am going to test this out on actual hardware. However, I was wondering if anyone had any experience utilizing both SSP ports and the SPI port on an LPC1700 device? Did it work? Since it supposedly works on LPC2300 devices, what is the problem with it on LPC1700 devices?
> >
> > Lastly, I realize that there are options available to me to resolve this issue, but that is another discussion.
> >
> > Jeff
>
Reply by ●May 4, 20122012-05-04
Jeff, read carefully the user's manual: it states that the 2 interfaces
cannot be used simultaneously.
If you experiment with this, check the 2 cases:
- sequential use (one port and then the other)
- concurrent use (sending different data on the ports)
I'm sure others will be interested in the results (I raised the question
several months back and have been told to avoid the case...)
Hope it helps
Olivier
alexander_ribero wrote:
>
> Hi:
>
> In the LPC2300, the SPI and SSP0 share the same interrupt vector.
>
> Regards,
>
> Alex
>
> --- In l... ,
> "ksdoubleshooter" wrote:
> >
> > I have a project using an LPC1768. This project has a requirement
> for 7 UART's, so I used three UART's on the LPC1768 and added two
> SC16IS752's, which are dual UART's with selectable I2C or SPI
> interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> other. Each DUART has an IRQ line and I ran these back to separate
> EINT pins. Running the DUART's on separate SSP ports with separate
> interrupt pins will allow straight forward interrupt handling for each
> DUART.
> >
> > In addition, there is a display, with serial interface and a serial
> flash memory part. I tied both of these parts to the SPI port. Neither
> the display nor the serial flash will be accessed during interrupts.
> >
> > While writing the low level driver modules for the SSP and SPI
> ports, I noticed this note in the rev 2 LPC17xx user manual:
> >
> > Remark: SSP0 is intended to be used as an alternative for the SPI
> interface, which is included as a legacy peripheral. Only one of these
> peripherals can be used at the any one time.
> >
> > This is odd since both SSP ports and the SPI port can get their I/O
> lines out at the same time and all have separate interrupt inputs to
> the NVIC, etc. I referred back to the LPC23xx user manual and there is
> no limitation noted on using these ports at the same time.
> >
> > I have an LPCXpresso 1769 board and since I have the drivers
> written, I am going to test this out on actual hardware. However, I
> was wondering if anyone had any experience utilizing both SSP ports
> and the SPI port on an LPC1700 device? Did it work? Since it
> supposedly works on LPC2300 devices, what is the problem with it on
> LPC1700 devices?
> >
> > Lastly, I realize that there are options available to me to resolve
> this issue, but that is another discussion.
> >
> > Jeff
> >
--
Olivier Gautherot
*Email:* o...@gautherot.net
*Cel:* +56 98 730 9361
*Web:* www.gautherot.net
*LinkedIn:* http://www.linkedin.com/in/ogautherot
cannot be used simultaneously.
If you experiment with this, check the 2 cases:
- sequential use (one port and then the other)
- concurrent use (sending different data on the ports)
I'm sure others will be interested in the results (I raised the question
several months back and have been told to avoid the case...)
Hope it helps
Olivier
alexander_ribero wrote:
>
> Hi:
>
> In the LPC2300, the SPI and SSP0 share the same interrupt vector.
>
> Regards,
>
> Alex
>
> --- In l... ,
> "ksdoubleshooter" wrote:
> >
> > I have a project using an LPC1768. This project has a requirement
> for 7 UART's, so I used three UART's on the LPC1768 and added two
> SC16IS752's, which are dual UART's with selectable I2C or SPI
> interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> other. Each DUART has an IRQ line and I ran these back to separate
> EINT pins. Running the DUART's on separate SSP ports with separate
> interrupt pins will allow straight forward interrupt handling for each
> DUART.
> >
> > In addition, there is a display, with serial interface and a serial
> flash memory part. I tied both of these parts to the SPI port. Neither
> the display nor the serial flash will be accessed during interrupts.
> >
> > While writing the low level driver modules for the SSP and SPI
> ports, I noticed this note in the rev 2 LPC17xx user manual:
> >
> > Remark: SSP0 is intended to be used as an alternative for the SPI
> interface, which is included as a legacy peripheral. Only one of these
> peripherals can be used at the any one time.
> >
> > This is odd since both SSP ports and the SPI port can get their I/O
> lines out at the same time and all have separate interrupt inputs to
> the NVIC, etc. I referred back to the LPC23xx user manual and there is
> no limitation noted on using these ports at the same time.
> >
> > I have an LPCXpresso 1769 board and since I have the drivers
> written, I am going to test this out on actual hardware. However, I
> was wondering if anyone had any experience utilizing both SSP ports
> and the SPI port on an LPC1700 device? Did it work? Since it
> supposedly works on LPC2300 devices, what is the problem with it on
> LPC1700 devices?
> >
> > Lastly, I realize that there are options available to me to resolve
> this issue, but that is another discussion.
> >
> > Jeff
> >
--
Olivier Gautherot
*Email:* o...@gautherot.net
*Cel:* +56 98 730 9361
*Web:* www.gautherot.net
*LinkedIn:* http://www.linkedin.com/in/ogautherot
Reply by ●May 7, 20122012-05-07
I've contacted an NXP FAE and he thinks the note only applies to 80-pin
devices, but he is checking with the applications people. I'll let you know
what they come back with.
I haven't had time to test this on my Xpresso board yet.
Jeff
--- In l..., Olivier Gautherot wrote:
>
> Jeff, read carefully the user's manual: it states that the 2 interfaces
> cannot be used simultaneously.
>
> If you experiment with this, check the 2 cases:
> - sequential use (one port and then the other)
> - concurrent use (sending different data on the ports)
>
> I'm sure others will be interested in the results (I raised the question
> several months back and have been told to avoid the case...)
>
> Hope it helps
> Olivier
> alexander_ribero wrote:
> >
> > Hi:
> >
> > In the LPC2300, the SPI and SSP0 share the same interrupt vector.
> >
> > Regards,
> >
> > Alex
> >
> > --- In l... ,
> > "ksdoubleshooter" wrote:
> > >
> > > I have a project using an LPC1768. This project has a requirement
> > for 7 UART's, so I used three UART's on the LPC1768 and added two
> > SC16IS752's, which are dual UART's with selectable I2C or SPI
> > interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> > other. Each DUART has an IRQ line and I ran these back to separate
> > EINT pins. Running the DUART's on separate SSP ports with separate
> > interrupt pins will allow straight forward interrupt handling for each
> > DUART.
> > >
> > > In addition, there is a display, with serial interface and a serial
> > flash memory part. I tied both of these parts to the SPI port. Neither
> > the display nor the serial flash will be accessed during interrupts.
> > >
> > > While writing the low level driver modules for the SSP and SPI
> > ports, I noticed this note in the rev 2 LPC17xx user manual:
> > >
> > > Remark: SSP0 is intended to be used as an alternative for the SPI
> > interface, which is included as a legacy peripheral. Only one of these
> > peripherals can be used at the any one time.
> > >
> > > This is odd since both SSP ports and the SPI port can get their I/O
> > lines out at the same time and all have separate interrupt inputs to
> > the NVIC, etc. I referred back to the LPC23xx user manual and there is
> > no limitation noted on using these ports at the same time.
> > >
> > > I have an LPCXpresso 1769 board and since I have the drivers
> > written, I am going to test this out on actual hardware. However, I
> > was wondering if anyone had any experience utilizing both SSP ports
> > and the SPI port on an LPC1700 device? Did it work? Since it
> > supposedly works on LPC2300 devices, what is the problem with it on
> > LPC1700 devices?
> > >
> > > Lastly, I realize that there are options available to me to resolve
> > this issue, but that is another discussion.
> > >
> > > Jeff
> > >
> >
> >
> --
>
> Olivier Gautherot
> *Email:* olivier@...
> *Cel:* +56 98 730 9361
> *Web:* www.gautherot.net
> *LinkedIn:* http://www.linkedin.com/in/ogautherot
>
>
>
I haven't had time to test this on my Xpresso board yet.
Jeff
--- In l..., Olivier Gautherot wrote:
>
> Jeff, read carefully the user's manual: it states that the 2 interfaces
> cannot be used simultaneously.
>
> If you experiment with this, check the 2 cases:
> - sequential use (one port and then the other)
> - concurrent use (sending different data on the ports)
>
> I'm sure others will be interested in the results (I raised the question
> several months back and have been told to avoid the case...)
>
> Hope it helps
> Olivier
> alexander_ribero wrote:
> >
> > Hi:
> >
> > In the LPC2300, the SPI and SSP0 share the same interrupt vector.
> >
> > Regards,
> >
> > Alex
> >
> > --- In l... ,
> > "ksdoubleshooter" wrote:
> > >
> > > I have a project using an LPC1768. This project has a requirement
> > for 7 UART's, so I used three UART's on the LPC1768 and added two
> > SC16IS752's, which are dual UART's with selectable I2C or SPI
> > interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> > other. Each DUART has an IRQ line and I ran these back to separate
> > EINT pins. Running the DUART's on separate SSP ports with separate
> > interrupt pins will allow straight forward interrupt handling for each
> > DUART.
> > >
> > > In addition, there is a display, with serial interface and a serial
> > flash memory part. I tied both of these parts to the SPI port. Neither
> > the display nor the serial flash will be accessed during interrupts.
> > >
> > > While writing the low level driver modules for the SSP and SPI
> > ports, I noticed this note in the rev 2 LPC17xx user manual:
> > >
> > > Remark: SSP0 is intended to be used as an alternative for the SPI
> > interface, which is included as a legacy peripheral. Only one of these
> > peripherals can be used at the any one time.
> > >
> > > This is odd since both SSP ports and the SPI port can get their I/O
> > lines out at the same time and all have separate interrupt inputs to
> > the NVIC, etc. I referred back to the LPC23xx user manual and there is
> > no limitation noted on using these ports at the same time.
> > >
> > > I have an LPCXpresso 1769 board and since I have the drivers
> > written, I am going to test this out on actual hardware. However, I
> > was wondering if anyone had any experience utilizing both SSP ports
> > and the SPI port on an LPC1700 device? Did it work? Since it
> > supposedly works on LPC2300 devices, what is the problem with it on
> > LPC1700 devices?
> > >
> > > Lastly, I realize that there are options available to me to resolve
> > this issue, but that is another discussion.
> > >
> > > Jeff
> > >
> >
> >
> --
>
> Olivier Gautherot
> *Email:* olivier@...
> *Cel:* +56 98 730 9361
> *Web:* www.gautherot.net
> *LinkedIn:* http://www.linkedin.com/in/ogautherot
>
>
>
Reply by ●May 7, 20122012-05-07
Just received confirmation from NXP app's that the user manual notation
does not apply to 100-pin parts. The stated reason is that on 80-pin parts,
SSEL0 is only available on p0.16, which is the only pin available for SSEL on
the SPI.
I never use SSEL anyway for master use. I prefer using I/O under program control to generate SSP/SPI chip selects. So apparently, all three could be used on 80-pin parts if the SSEL pins are not used.
Jeff
--- In l..., Olivier Gautherot wrote:
>
> Jeff, read carefully the user's manual: it states that the 2 interfaces
> cannot be used simultaneously.
>
> If you experiment with this, check the 2 cases:
> - sequential use (one port and then the other)
> - concurrent use (sending different data on the ports)
>
> I'm sure others will be interested in the results (I raised the question
> several months back and have been told to avoid the case...)
>
> Hope it helps
> Olivier
> alexander_ribero wrote:
> >
> > Hi:
> >
> > In the LPC2300, the SPI and SSP0 share the same interrupt vector.
> >
> > Regards,
> >
> > Alex
> >
> > --- In l... ,
> > "ksdoubleshooter" wrote:
> > >
> > > I have a project using an LPC1768. This project has a requirement
> > for 7 UART's, so I used three UART's on the LPC1768 and added two
> > SC16IS752's, which are dual UART's with selectable I2C or SPI
> > interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> > other. Each DUART has an IRQ line and I ran these back to separate
> > EINT pins. Running the DUART's on separate SSP ports with separate
> > interrupt pins will allow straight forward interrupt handling for each
> > DUART.
> > >
> > > In addition, there is a display, with serial interface and a serial
> > flash memory part. I tied both of these parts to the SPI port. Neither
> > the display nor the serial flash will be accessed during interrupts.
> > >
> > > While writing the low level driver modules for the SSP and SPI
> > ports, I noticed this note in the rev 2 LPC17xx user manual:
> > >
> > > Remark: SSP0 is intended to be used as an alternative for the SPI
> > interface, which is included as a legacy peripheral. Only one of these
> > peripherals can be used at the any one time.
> > >
> > > This is odd since both SSP ports and the SPI port can get their I/O
> > lines out at the same time and all have separate interrupt inputs to
> > the NVIC, etc. I referred back to the LPC23xx user manual and there is
> > no limitation noted on using these ports at the same time.
> > >
> > > I have an LPCXpresso 1769 board and since I have the drivers
> > written, I am going to test this out on actual hardware. However, I
> > was wondering if anyone had any experience utilizing both SSP ports
> > and the SPI port on an LPC1700 device? Did it work? Since it
> > supposedly works on LPC2300 devices, what is the problem with it on
> > LPC1700 devices?
> > >
> > > Lastly, I realize that there are options available to me to resolve
> > this issue, but that is another discussion.
> > >
> > > Jeff
> > >
> >
> >
> --
>
> Olivier Gautherot
> *Email:* olivier@...
> *Cel:* +56 98 730 9361
> *Web:* www.gautherot.net
> *LinkedIn:* http://www.linkedin.com/in/ogautherot
>
>
>
I never use SSEL anyway for master use. I prefer using I/O under program control to generate SSP/SPI chip selects. So apparently, all three could be used on 80-pin parts if the SSEL pins are not used.
Jeff
--- In l..., Olivier Gautherot wrote:
>
> Jeff, read carefully the user's manual: it states that the 2 interfaces
> cannot be used simultaneously.
>
> If you experiment with this, check the 2 cases:
> - sequential use (one port and then the other)
> - concurrent use (sending different data on the ports)
>
> I'm sure others will be interested in the results (I raised the question
> several months back and have been told to avoid the case...)
>
> Hope it helps
> Olivier
> alexander_ribero wrote:
> >
> > Hi:
> >
> > In the LPC2300, the SPI and SSP0 share the same interrupt vector.
> >
> > Regards,
> >
> > Alex
> >
> > --- In l... ,
> > "ksdoubleshooter" wrote:
> > >
> > > I have a project using an LPC1768. This project has a requirement
> > for 7 UART's, so I used three UART's on the LPC1768 and added two
> > SC16IS752's, which are dual UART's with selectable I2C or SPI
> > interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> > other. Each DUART has an IRQ line and I ran these back to separate
> > EINT pins. Running the DUART's on separate SSP ports with separate
> > interrupt pins will allow straight forward interrupt handling for each
> > DUART.
> > >
> > > In addition, there is a display, with serial interface and a serial
> > flash memory part. I tied both of these parts to the SPI port. Neither
> > the display nor the serial flash will be accessed during interrupts.
> > >
> > > While writing the low level driver modules for the SSP and SPI
> > ports, I noticed this note in the rev 2 LPC17xx user manual:
> > >
> > > Remark: SSP0 is intended to be used as an alternative for the SPI
> > interface, which is included as a legacy peripheral. Only one of these
> > peripherals can be used at the any one time.
> > >
> > > This is odd since both SSP ports and the SPI port can get their I/O
> > lines out at the same time and all have separate interrupt inputs to
> > the NVIC, etc. I referred back to the LPC23xx user manual and there is
> > no limitation noted on using these ports at the same time.
> > >
> > > I have an LPCXpresso 1769 board and since I have the drivers
> > written, I am going to test this out on actual hardware. However, I
> > was wondering if anyone had any experience utilizing both SSP ports
> > and the SPI port on an LPC1700 device? Did it work? Since it
> > supposedly works on LPC2300 devices, what is the problem with it on
> > LPC1700 devices?
> > >
> > > Lastly, I realize that there are options available to me to resolve
> > this issue, but that is another discussion.
> > >
> > > Jeff
> > >
> >
> >
> --
>
> Olivier Gautherot
> *Email:* olivier@...
> *Cel:* +56 98 730 9361
> *Web:* www.gautherot.net
> *LinkedIn:* http://www.linkedin.com/in/ogautherot
>
>
>
Reply by ●May 9, 20122012-05-09
It would be great if we could use SPI besides the 2 SSP ports. Please confirm
when you get this working.
RM
--- In l..., "ksdoubleshooter" wrote:
>
> Just received confirmation from NXP app's that the user manual notation does not apply to 100-pin parts. The stated reason is that on 80-pin parts, SSEL0 is only available on p0.16, which is the only pin available for SSEL on the SPI.
>
> I never use SSEL anyway for master use. I prefer using I/O under program control to generate SSP/SPI chip selects. So apparently, all three could be used on 80-pin parts if the SSEL pins are not used.
>
> Jeff
>
> --- In l..., Olivier Gautherot wrote:
> >
> > Jeff, read carefully the user's manual: it states that the 2 interfaces
> > cannot be used simultaneously.
> >
> > If you experiment with this, check the 2 cases:
> > - sequential use (one port and then the other)
> > - concurrent use (sending different data on the ports)
> >
> > I'm sure others will be interested in the results (I raised the question
> > several months back and have been told to avoid the case...)
> >
> > Hope it helps
> > Olivier
> >
> >
> > alexander_ribero wrote:
> > >
> > > Hi:
> > >
> > > In the LPC2300, the SPI and SSP0 share the same interrupt vector.
> > >
> > > Regards,
> > >
> > > Alex
> > >
> > > --- In l... ,
> > > "ksdoubleshooter" wrote:
> > > >
> > > > I have a project using an LPC1768. This project has a requirement
> > > for 7 UART's, so I used three UART's on the LPC1768 and added two
> > > SC16IS752's, which are dual UART's with selectable I2C or SPI
> > > interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> > > other. Each DUART has an IRQ line and I ran these back to separate
> > > EINT pins. Running the DUART's on separate SSP ports with separate
> > > interrupt pins will allow straight forward interrupt handling for each
> > > DUART.
> > > >
> > > > In addition, there is a display, with serial interface and a serial
> > > flash memory part. I tied both of these parts to the SPI port. Neither
> > > the display nor the serial flash will be accessed during interrupts.
> > > >
> > > > While writing the low level driver modules for the SSP and SPI
> > > ports, I noticed this note in the rev 2 LPC17xx user manual:
> > > >
> > > > Remark: SSP0 is intended to be used as an alternative for the SPI
> > > interface, which is included as a legacy peripheral. Only one of these
> > > peripherals can be used at the any one time.
> > > >
> > > > This is odd since both SSP ports and the SPI port can get their I/O
> > > lines out at the same time and all have separate interrupt inputs to
> > > the NVIC, etc. I referred back to the LPC23xx user manual and there is
> > > no limitation noted on using these ports at the same time.
> > > >
> > > > I have an LPCXpresso 1769 board and since I have the drivers
> > > written, I am going to test this out on actual hardware. However, I
> > > was wondering if anyone had any experience utilizing both SSP ports
> > > and the SPI port on an LPC1700 device? Did it work? Since it
> > > supposedly works on LPC2300 devices, what is the problem with it on
> > > LPC1700 devices?
> > > >
> > > > Lastly, I realize that there are options available to me to resolve
> > > this issue, but that is another discussion.
> > > >
> > > > Jeff
> > > >
> > >
> > >
> >
> >
> > --
> >
> > Olivier Gautherot
> > *Email:* olivier@
> > *Cel:* +56 98 730 9361
> > *Web:* www.gautherot.net
> > *LinkedIn:* http://www.linkedin.com/in/ogautherot
> >
> >
> >
> >
>
RM
--- In l..., "ksdoubleshooter" wrote:
>
> Just received confirmation from NXP app's that the user manual notation does not apply to 100-pin parts. The stated reason is that on 80-pin parts, SSEL0 is only available on p0.16, which is the only pin available for SSEL on the SPI.
>
> I never use SSEL anyway for master use. I prefer using I/O under program control to generate SSP/SPI chip selects. So apparently, all three could be used on 80-pin parts if the SSEL pins are not used.
>
> Jeff
>
> --- In l..., Olivier Gautherot wrote:
> >
> > Jeff, read carefully the user's manual: it states that the 2 interfaces
> > cannot be used simultaneously.
> >
> > If you experiment with this, check the 2 cases:
> > - sequential use (one port and then the other)
> > - concurrent use (sending different data on the ports)
> >
> > I'm sure others will be interested in the results (I raised the question
> > several months back and have been told to avoid the case...)
> >
> > Hope it helps
> > Olivier
> >
> >
> > alexander_ribero wrote:
> > >
> > > Hi:
> > >
> > > In the LPC2300, the SPI and SSP0 share the same interrupt vector.
> > >
> > > Regards,
> > >
> > > Alex
> > >
> > > --- In l... ,
> > > "ksdoubleshooter" wrote:
> > > >
> > > > I have a project using an LPC1768. This project has a requirement
> > > for 7 UART's, so I used three UART's on the LPC1768 and added two
> > > SC16IS752's, which are dual UART's with selectable I2C or SPI
> > > interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> > > other. Each DUART has an IRQ line and I ran these back to separate
> > > EINT pins. Running the DUART's on separate SSP ports with separate
> > > interrupt pins will allow straight forward interrupt handling for each
> > > DUART.
> > > >
> > > > In addition, there is a display, with serial interface and a serial
> > > flash memory part. I tied both of these parts to the SPI port. Neither
> > > the display nor the serial flash will be accessed during interrupts.
> > > >
> > > > While writing the low level driver modules for the SSP and SPI
> > > ports, I noticed this note in the rev 2 LPC17xx user manual:
> > > >
> > > > Remark: SSP0 is intended to be used as an alternative for the SPI
> > > interface, which is included as a legacy peripheral. Only one of these
> > > peripherals can be used at the any one time.
> > > >
> > > > This is odd since both SSP ports and the SPI port can get their I/O
> > > lines out at the same time and all have separate interrupt inputs to
> > > the NVIC, etc. I referred back to the LPC23xx user manual and there is
> > > no limitation noted on using these ports at the same time.
> > > >
> > > > I have an LPCXpresso 1769 board and since I have the drivers
> > > written, I am going to test this out on actual hardware. However, I
> > > was wondering if anyone had any experience utilizing both SSP ports
> > > and the SPI port on an LPC1700 device? Did it work? Since it
> > > supposedly works on LPC2300 devices, what is the problem with it on
> > > LPC1700 devices?
> > > >
> > > > Lastly, I realize that there are options available to me to resolve
> > > this issue, but that is another discussion.
> > > >
> > > > Jeff
> > > >
> > >
> > >
> >
> >
> > --
> >
> > Olivier Gautherot
> > *Email:* olivier@
> > *Cel:* +56 98 730 9361
> > *Web:* www.gautherot.net
> > *LinkedIn:* http://www.linkedin.com/in/ogautherot
> >
> >
> >
> >
>
Reply by ●May 9, 20122012-05-09
Another confirmation from NXP that all SSP/SPI ports can be used on 80-pin
devices if the conflict for P0.16 is resolved by not using the SSEL function on
either SSP0 or SPI.
Jeff
--- In l..., "ksdoubleshooter" wrote:
>
> Just received confirmation from NXP app's that the user manual notation does not apply to 100-pin parts. The stated reason is that on 80-pin parts, SSEL0 is only available on p0.16, which is the only pin available for SSEL on the SPI.
>
> I never use SSEL anyway for master use. I prefer using I/O under program control to generate SSP/SPI chip selects. So apparently, all three could be used on 80-pin parts if the SSEL pins are not used.
>
> Jeff
>
> --- In l..., Olivier Gautherot wrote:
> >
> > Jeff, read carefully the user's manual: it states that the 2 interfaces
> > cannot be used simultaneously.
> >
> > If you experiment with this, check the 2 cases:
> > - sequential use (one port and then the other)
> > - concurrent use (sending different data on the ports)
> >
> > I'm sure others will be interested in the results (I raised the question
> > several months back and have been told to avoid the case...)
> >
> > Hope it helps
> > Olivier
> >
> >
> > alexander_ribero wrote:
> > >
> > > Hi:
> > >
> > > In the LPC2300, the SPI and SSP0 share the same interrupt vector.
> > >
> > > Regards,
> > >
> > > Alex
> > >
> > > --- In l... ,
> > > "ksdoubleshooter" wrote:
> > > >
> > > > I have a project using an LPC1768. This project has a requirement
> > > for 7 UART's, so I used three UART's on the LPC1768 and added two
> > > SC16IS752's, which are dual UART's with selectable I2C or SPI
> > > interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> > > other. Each DUART has an IRQ line and I ran these back to separate
> > > EINT pins. Running the DUART's on separate SSP ports with separate
> > > interrupt pins will allow straight forward interrupt handling for each
> > > DUART.
> > > >
> > > > In addition, there is a display, with serial interface and a serial
> > > flash memory part. I tied both of these parts to the SPI port. Neither
> > > the display nor the serial flash will be accessed during interrupts.
> > > >
> > > > While writing the low level driver modules for the SSP and SPI
> > > ports, I noticed this note in the rev 2 LPC17xx user manual:
> > > >
> > > > Remark: SSP0 is intended to be used as an alternative for the SPI
> > > interface, which is included as a legacy peripheral. Only one of these
> > > peripherals can be used at the any one time.
> > > >
> > > > This is odd since both SSP ports and the SPI port can get their I/O
> > > lines out at the same time and all have separate interrupt inputs to
> > > the NVIC, etc. I referred back to the LPC23xx user manual and there is
> > > no limitation noted on using these ports at the same time.
> > > >
> > > > I have an LPCXpresso 1769 board and since I have the drivers
> > > written, I am going to test this out on actual hardware. However, I
> > > was wondering if anyone had any experience utilizing both SSP ports
> > > and the SPI port on an LPC1700 device? Did it work? Since it
> > > supposedly works on LPC2300 devices, what is the problem with it on
> > > LPC1700 devices?
> > > >
> > > > Lastly, I realize that there are options available to me to resolve
> > > this issue, but that is another discussion.
> > > >
> > > > Jeff
> > > >
> > >
> > >
> >
> >
> > --
> >
> > Olivier Gautherot
> > *Email:* olivier@
> > *Cel:* +56 98 730 9361
> > *Web:* www.gautherot.net
> > *LinkedIn:* http://www.linkedin.com/in/ogautherot
> >
> >
> >
> >
>
Jeff
--- In l..., "ksdoubleshooter" wrote:
>
> Just received confirmation from NXP app's that the user manual notation does not apply to 100-pin parts. The stated reason is that on 80-pin parts, SSEL0 is only available on p0.16, which is the only pin available for SSEL on the SPI.
>
> I never use SSEL anyway for master use. I prefer using I/O under program control to generate SSP/SPI chip selects. So apparently, all three could be used on 80-pin parts if the SSEL pins are not used.
>
> Jeff
>
> --- In l..., Olivier Gautherot wrote:
> >
> > Jeff, read carefully the user's manual: it states that the 2 interfaces
> > cannot be used simultaneously.
> >
> > If you experiment with this, check the 2 cases:
> > - sequential use (one port and then the other)
> > - concurrent use (sending different data on the ports)
> >
> > I'm sure others will be interested in the results (I raised the question
> > several months back and have been told to avoid the case...)
> >
> > Hope it helps
> > Olivier
> >
> >
> > alexander_ribero wrote:
> > >
> > > Hi:
> > >
> > > In the LPC2300, the SPI and SSP0 share the same interrupt vector.
> > >
> > > Regards,
> > >
> > > Alex
> > >
> > > --- In l... ,
> > > "ksdoubleshooter" wrote:
> > > >
> > > > I have a project using an LPC1768. This project has a requirement
> > > for 7 UART's, so I used three UART's on the LPC1768 and added two
> > > SC16IS752's, which are dual UART's with selectable I2C or SPI
> > > interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> > > other. Each DUART has an IRQ line and I ran these back to separate
> > > EINT pins. Running the DUART's on separate SSP ports with separate
> > > interrupt pins will allow straight forward interrupt handling for each
> > > DUART.
> > > >
> > > > In addition, there is a display, with serial interface and a serial
> > > flash memory part. I tied both of these parts to the SPI port. Neither
> > > the display nor the serial flash will be accessed during interrupts.
> > > >
> > > > While writing the low level driver modules for the SSP and SPI
> > > ports, I noticed this note in the rev 2 LPC17xx user manual:
> > > >
> > > > Remark: SSP0 is intended to be used as an alternative for the SPI
> > > interface, which is included as a legacy peripheral. Only one of these
> > > peripherals can be used at the any one time.
> > > >
> > > > This is odd since both SSP ports and the SPI port can get their I/O
> > > lines out at the same time and all have separate interrupt inputs to
> > > the NVIC, etc. I referred back to the LPC23xx user manual and there is
> > > no limitation noted on using these ports at the same time.
> > > >
> > > > I have an LPCXpresso 1769 board and since I have the drivers
> > > written, I am going to test this out on actual hardware. However, I
> > > was wondering if anyone had any experience utilizing both SSP ports
> > > and the SPI port on an LPC1700 device? Did it work? Since it
> > > supposedly works on LPC2300 devices, what is the problem with it on
> > > LPC1700 devices?
> > > >
> > > > Lastly, I realize that there are options available to me to resolve
> > > this issue, but that is another discussion.
> > > >
> > > > Jeff
> > > >
> > >
> > >
> >
> >
> > --
> >
> > Olivier Gautherot
> > *Email:* olivier@
> > *Cel:* +56 98 730 9361
> > *Web:* www.gautherot.net
> > *LinkedIn:* http://www.linkedin.com/in/ogautherot
> >
> >
> >
> >
>
Reply by ●February 8, 20132013-02-08
Jeff,
Can you confirm that there are no gotchas for 100 pin devices while using SSP0 and SPI both simultaneously.
Thanks
Rakesh
--- In l..., "ksdoubleshooter" wrote:
>
> Another confirmation from NXP that all SSP/SPI ports can be used on 80-pin devices if the conflict for P0.16 is resolved by not using the SSEL function on either SSP0 or SPI.
>
> Jeff
>
> --- In l..., "ksdoubleshooter" wrote:
> >
> >
> >
> > Just received confirmation from NXP app's that the user manual notation does not apply to 100-pin parts. The stated reason is that on 80-pin parts, SSEL0 is only available on p0.16, which is the only pin available for SSEL on the SPI.
> >
> > I never use SSEL anyway for master use. I prefer using I/O under program control to generate SSP/SPI chip selects. So apparently, all three could be used on 80-pin parts if the SSEL pins are not used.
> >
> > Jeff
> >
> > --- In l..., Olivier Gautherot wrote:
> > >
> > > Jeff, read carefully the user's manual: it states that the 2 interfaces
> > > cannot be used simultaneously.
> > >
> > > If you experiment with this, check the 2 cases:
> > > - sequential use (one port and then the other)
> > > - concurrent use (sending different data on the ports)
> > >
> > > I'm sure others will be interested in the results (I raised the question
> > > several months back and have been told to avoid the case...)
> > >
> > > Hope it helps
> > > Olivier
> > >
> > >
> > > alexander_ribero wrote:
> > > >
> > > > Hi:
> > > >
> > > > In the LPC2300, the SPI and SSP0 share the same interrupt vector.
> > > >
> > > > Regards,
> > > >
> > > > Alex
> > > >
> > > > --- In l... ,
> > > > "ksdoubleshooter" wrote:
> > > > >
> > > > > I have a project using an LPC1768. This project has a requirement
> > > > for 7 UART's, so I used three UART's on the LPC1768 and added two
> > > > SC16IS752's, which are dual UART's with selectable I2C or SPI
> > > > interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> > > > other. Each DUART has an IRQ line and I ran these back to separate
> > > > EINT pins. Running the DUART's on separate SSP ports with separate
> > > > interrupt pins will allow straight forward interrupt handling for each
> > > > DUART.
> > > > >
> > > > > In addition, there is a display, with serial interface and a serial
> > > > flash memory part. I tied both of these parts to the SPI port. Neither
> > > > the display nor the serial flash will be accessed during interrupts.
> > > > >
> > > > > While writing the low level driver modules for the SSP and SPI
> > > > ports, I noticed this note in the rev 2 LPC17xx user manual:
> > > > >
> > > > > Remark: SSP0 is intended to be used as an alternative for the SPI
> > > > interface, which is included as a legacy peripheral. Only one of these
> > > > peripherals can be used at the any one time.
> > > > >
> > > > > This is odd since both SSP ports and the SPI port can get their I/O
> > > > lines out at the same time and all have separate interrupt inputs to
> > > > the NVIC, etc. I referred back to the LPC23xx user manual and there is
> > > > no limitation noted on using these ports at the same time.
> > > > >
> > > > > I have an LPCXpresso 1769 board and since I have the drivers
> > > > written, I am going to test this out on actual hardware. However, I
> > > > was wondering if anyone had any experience utilizing both SSP ports
> > > > and the SPI port on an LPC1700 device? Did it work? Since it
> > > > supposedly works on LPC2300 devices, what is the problem with it on
> > > > LPC1700 devices?
> > > > >
> > > > > Lastly, I realize that there are options available to me to resolve
> > > > this issue, but that is another discussion.
> > > > >
> > > > > Jeff
> > > > >
> > > >
> > > >
> > >
> > >
> > > --
> > >
> > > Olivier Gautherot
> > > *Email:* olivier@
> > > *Cel:* +56 98 730 9361
> > > *Web:* www.gautherot.net
> > > *LinkedIn:* http://www.linkedin.com/in/ogautherot
> > >
> > >
> > >
> > >
> > >
>
Can you confirm that there are no gotchas for 100 pin devices while using SSP0 and SPI both simultaneously.
Thanks
Rakesh
--- In l..., "ksdoubleshooter" wrote:
>
> Another confirmation from NXP that all SSP/SPI ports can be used on 80-pin devices if the conflict for P0.16 is resolved by not using the SSEL function on either SSP0 or SPI.
>
> Jeff
>
> --- In l..., "ksdoubleshooter" wrote:
> >
> >
> >
> > Just received confirmation from NXP app's that the user manual notation does not apply to 100-pin parts. The stated reason is that on 80-pin parts, SSEL0 is only available on p0.16, which is the only pin available for SSEL on the SPI.
> >
> > I never use SSEL anyway for master use. I prefer using I/O under program control to generate SSP/SPI chip selects. So apparently, all three could be used on 80-pin parts if the SSEL pins are not used.
> >
> > Jeff
> >
> > --- In l..., Olivier Gautherot wrote:
> > >
> > > Jeff, read carefully the user's manual: it states that the 2 interfaces
> > > cannot be used simultaneously.
> > >
> > > If you experiment with this, check the 2 cases:
> > > - sequential use (one port and then the other)
> > > - concurrent use (sending different data on the ports)
> > >
> > > I'm sure others will be interested in the results (I raised the question
> > > several months back and have been told to avoid the case...)
> > >
> > > Hope it helps
> > > Olivier
> > >
> > >
> > > alexander_ribero wrote:
> > > >
> > > > Hi:
> > > >
> > > > In the LPC2300, the SPI and SSP0 share the same interrupt vector.
> > > >
> > > > Regards,
> > > >
> > > > Alex
> > > >
> > > > --- In l... ,
> > > > "ksdoubleshooter" wrote:
> > > > >
> > > > > I have a project using an LPC1768. This project has a requirement
> > > > for 7 UART's, so I used three UART's on the LPC1768 and added two
> > > > SC16IS752's, which are dual UART's with selectable I2C or SPI
> > > > interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> > > > other. Each DUART has an IRQ line and I ran these back to separate
> > > > EINT pins. Running the DUART's on separate SSP ports with separate
> > > > interrupt pins will allow straight forward interrupt handling for each
> > > > DUART.
> > > > >
> > > > > In addition, there is a display, with serial interface and a serial
> > > > flash memory part. I tied both of these parts to the SPI port. Neither
> > > > the display nor the serial flash will be accessed during interrupts.
> > > > >
> > > > > While writing the low level driver modules for the SSP and SPI
> > > > ports, I noticed this note in the rev 2 LPC17xx user manual:
> > > > >
> > > > > Remark: SSP0 is intended to be used as an alternative for the SPI
> > > > interface, which is included as a legacy peripheral. Only one of these
> > > > peripherals can be used at the any one time.
> > > > >
> > > > > This is odd since both SSP ports and the SPI port can get their I/O
> > > > lines out at the same time and all have separate interrupt inputs to
> > > > the NVIC, etc. I referred back to the LPC23xx user manual and there is
> > > > no limitation noted on using these ports at the same time.
> > > > >
> > > > > I have an LPCXpresso 1769 board and since I have the drivers
> > > > written, I am going to test this out on actual hardware. However, I
> > > > was wondering if anyone had any experience utilizing both SSP ports
> > > > and the SPI port on an LPC1700 device? Did it work? Since it
> > > > supposedly works on LPC2300 devices, what is the problem with it on
> > > > LPC1700 devices?
> > > > >
> > > > > Lastly, I realize that there are options available to me to resolve
> > > > this issue, but that is another discussion.
> > > > >
> > > > > Jeff
> > > > >
> > > >
> > > >
> > >
> > >
> > > --
> > >
> > > Olivier Gautherot
> > > *Email:* olivier@
> > > *Cel:* +56 98 730 9361
> > > *Web:* www.gautherot.net
> > > *LinkedIn:* http://www.linkedin.com/in/ogautherot
> > >
> > >
> > >
> > >
> > >
>
Reply by ●February 8, 20132013-02-08
Rakesh,
from what the manual says, you can use SSP0 and SPI separately but not
simultaneously.
Hope it helps
--
Olivier Gautherot
o...@gautherot.net
www.gautherot.net
http://www.linkedin.com/in/ogautherot
On Fri, Feb 8, 2013 at 10:09 AM, rm_lucknow wrote:
> **
> Jeff,
> Can you confirm that there are no gotchas for 100 pin devices while using
> SSP0 and SPI both simultaneously.
>
> Thanks
>
> Rakesh
>
> --- In l..., "ksdoubleshooter" wrote:
> >
> >
> >
> > Another confirmation from NXP that all SSP/SPI ports can be used on
> 80-pin devices if the conflict for P0.16 is resolved by not using the SSEL
> function on either SSP0 or SPI.
> >
> > Jeff
> >
> > --- In l..., "ksdoubleshooter" wrote:
> > >
> > >
> > >
> > > Just received confirmation from NXP app's that the user manual
> notation does not apply to 100-pin parts. The stated reason is that on
> 80-pin parts, SSEL0 is only available on p0.16, which is the only pin
> available for SSEL on the SPI.
> > >
> > > I never use SSEL anyway for master use. I prefer using I/O under
> program control to generate SSP/SPI chip selects. So apparently, all three
> could be used on 80-pin parts if the SSEL pins are not used.
> > >
> > > Jeff
> > >
> > > --- In l..., Olivier Gautherot wrote:
> > > >
> > > > Jeff, read carefully the user's manual: it states that the 2
> interfaces
> > > > cannot be used simultaneously.
> > > >
> > > > If you experiment with this, check the 2 cases:
> > > > - sequential use (one port and then the other)
> > > > - concurrent use (sending different data on the ports)
> > > >
> > > > I'm sure others will be interested in the results (I raised the
> question
> > > > several months back and have been told to avoid the case...)
> > > >
> > > > Hope it helps
> > > > Olivier
> > > >
> > > >
> > > > alexander_ribero wrote:
> > > > >
> > > > > Hi:
> > > > >
> > > > > In the LPC2300, the SPI and SSP0 share the same interrupt vector.
> > > > >
> > > > > Regards,
> > > > >
> > > > > Alex
> > > > >
> > > > > --- In l... ,
> > > > > "ksdoubleshooter" wrote:
> > > > > >
> > > > > > I have a project using an LPC1768. This project has a
> requirement
> > > > > for 7 UART's, so I used three UART's on the LPC1768 and added two
> > > > > SC16IS752's, which are dual UART's with selectable I2C or SPI
> > > > > interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> > > > > other. Each DUART has an IRQ line and I ran these back to separate
> > > > > EINT pins. Running the DUART's on separate SSP ports with separate
> > > > > interrupt pins will allow straight forward interrupt handling for
> each
> > > > > DUART.
> > > > > >
> > > > > > In addition, there is a display, with serial interface and a
> serial
> > > > > flash memory part. I tied both of these parts to the SPI port.
> Neither
> > > > > the display nor the serial flash will be accessed during
> interrupts.
> > > > > >
> > > > > > While writing the low level driver modules for the SSP and SPI
> > > > > ports, I noticed this note in the rev 2 LPC17xx user manual:
> > > > > >
> > > > > > Remark: SSP0 is intended to be used as an alternative for the
> SPI
> > > > > interface, which is included as a legacy peripheral. Only one of
> these
> > > > > peripherals can be used at the any one time.
> > > > > >
> > > > > > This is odd since both SSP ports and the SPI port can get their
> I/O
> > > > > lines out at the same time and all have separate interrupt inputs
> to
> > > > > the NVIC, etc. I referred back to the LPC23xx user manual and
> there is
> > > > > no limitation noted on using these ports at the same time.
> > > > > >
> > > > > > I have an LPCXpresso 1769 board and since I have the drivers
> > > > > written, I am going to test this out on actual hardware. However,
> I
> > > > > was wondering if anyone had any experience utilizing both SSP
> ports
> > > > > and the SPI port on an LPC1700 device? Did it work? Since it
> > > > > supposedly works on LPC2300 devices, what is the problem with it
> on
> > > > > LPC1700 devices?
> > > > > >
> > > > > > Lastly, I realize that there are options available to me to
> resolve
> > > > > this issue, but that is another discussion.
> > > > > >
> > > > > > Jeff
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > >
> > > > Olivier Gautherot
> > > > *Email:* olivier@
> > > > *Cel:* +56 98 730 9361
> > > > *Web:* www.gautherot.net
> > > > *LinkedIn:* http://www.linkedin.com/in/ogautherot
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
>
from what the manual says, you can use SSP0 and SPI separately but not
simultaneously.
Hope it helps
--
Olivier Gautherot
o...@gautherot.net
www.gautherot.net
http://www.linkedin.com/in/ogautherot
On Fri, Feb 8, 2013 at 10:09 AM, rm_lucknow wrote:
> **
> Jeff,
> Can you confirm that there are no gotchas for 100 pin devices while using
> SSP0 and SPI both simultaneously.
>
> Thanks
>
> Rakesh
>
> --- In l..., "ksdoubleshooter" wrote:
> >
> >
> >
> > Another confirmation from NXP that all SSP/SPI ports can be used on
> 80-pin devices if the conflict for P0.16 is resolved by not using the SSEL
> function on either SSP0 or SPI.
> >
> > Jeff
> >
> > --- In l..., "ksdoubleshooter" wrote:
> > >
> > >
> > >
> > > Just received confirmation from NXP app's that the user manual
> notation does not apply to 100-pin parts. The stated reason is that on
> 80-pin parts, SSEL0 is only available on p0.16, which is the only pin
> available for SSEL on the SPI.
> > >
> > > I never use SSEL anyway for master use. I prefer using I/O under
> program control to generate SSP/SPI chip selects. So apparently, all three
> could be used on 80-pin parts if the SSEL pins are not used.
> > >
> > > Jeff
> > >
> > > --- In l..., Olivier Gautherot wrote:
> > > >
> > > > Jeff, read carefully the user's manual: it states that the 2
> interfaces
> > > > cannot be used simultaneously.
> > > >
> > > > If you experiment with this, check the 2 cases:
> > > > - sequential use (one port and then the other)
> > > > - concurrent use (sending different data on the ports)
> > > >
> > > > I'm sure others will be interested in the results (I raised the
> question
> > > > several months back and have been told to avoid the case...)
> > > >
> > > > Hope it helps
> > > > Olivier
> > > >
> > > >
> > > > alexander_ribero wrote:
> > > > >
> > > > > Hi:
> > > > >
> > > > > In the LPC2300, the SPI and SSP0 share the same interrupt vector.
> > > > >
> > > > > Regards,
> > > > >
> > > > > Alex
> > > > >
> > > > > --- In l... ,
> > > > > "ksdoubleshooter" wrote:
> > > > > >
> > > > > > I have a project using an LPC1768. This project has a
> requirement
> > > > > for 7 UART's, so I used three UART's on the LPC1768 and added two
> > > > > SC16IS752's, which are dual UART's with selectable I2C or SPI
> > > > > interface. I allocated SSP0 to one of the DUART's and SSP1 to the
> > > > > other. Each DUART has an IRQ line and I ran these back to separate
> > > > > EINT pins. Running the DUART's on separate SSP ports with separate
> > > > > interrupt pins will allow straight forward interrupt handling for
> each
> > > > > DUART.
> > > > > >
> > > > > > In addition, there is a display, with serial interface and a
> serial
> > > > > flash memory part. I tied both of these parts to the SPI port.
> Neither
> > > > > the display nor the serial flash will be accessed during
> interrupts.
> > > > > >
> > > > > > While writing the low level driver modules for the SSP and SPI
> > > > > ports, I noticed this note in the rev 2 LPC17xx user manual:
> > > > > >
> > > > > > Remark: SSP0 is intended to be used as an alternative for the
> SPI
> > > > > interface, which is included as a legacy peripheral. Only one of
> these
> > > > > peripherals can be used at the any one time.
> > > > > >
> > > > > > This is odd since both SSP ports and the SPI port can get their
> I/O
> > > > > lines out at the same time and all have separate interrupt inputs
> to
> > > > > the NVIC, etc. I referred back to the LPC23xx user manual and
> there is
> > > > > no limitation noted on using these ports at the same time.
> > > > > >
> > > > > > I have an LPCXpresso 1769 board and since I have the drivers
> > > > > written, I am going to test this out on actual hardware. However,
> I
> > > > > was wondering if anyone had any experience utilizing both SSP
> ports
> > > > > and the SPI port on an LPC1700 device? Did it work? Since it
> > > > > supposedly works on LPC2300 devices, what is the problem with it
> on
> > > > > LPC1700 devices?
> > > > > >
> > > > > > Lastly, I realize that there are options available to me to
> resolve
> > > > > this issue, but that is another discussion.
> > > > > >
> > > > > > Jeff
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > >
> > > > Olivier Gautherot
> > > > *Email:* olivier@
> > > > *Cel:* +56 98 730 9361
> > > > *Web:* www.gautherot.net
> > > > *LinkedIn:* http://www.linkedin.com/in/ogautherot
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
>
