Olivier,
It might be possible to use both simultaneously - please see previous
message in this tread :
http://tech.groups.yahoo.com/group/lpc2000/message/57190
.
I only want a confirmation if it really works that way .
Maybe nxp can pitch in with their views.
Thanks
Rakesh
--- In l..., Olivier Gautherot wrote:
>
> Rakesh,
>
> from what the manual says, you can use SSP0 and SPI separately but not
> simultaneously.
>
> Hope it helps
> --
> Olivier Gautherot
> olivier@...
> 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
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
> >
> >
>
>
Simultaneous use of SSP and SPI ports on LPC1700
Started by ●May 4, 2012
Reply by ●February 11, 20132013-02-11
Reply by ●February 11, 20132013-02-11
Yes, you can use SSP0 and SPI ports simultaneously on the 100 pin LPC1700 parts.
This also works with the 80 pin parts if you resolve the conflict with SSEL pin.
I never use the SSEL function on either SSP or SPI ports. I use GPIO pins for
the chip select functions.
I have a project running with both SSP and the SPI ports running fine.
Jeff
--- In l..., "rm_lucknow" wrote:
>
> Olivier,
> It might be possible to use both simultaneously - please see previous
> message in this tread :
> http://tech.groups.yahoo.com/group/lpc2000/message/57190
> .
> I only want a confirmation if it really works that way .
> Maybe nxp can pitch in with their views.
>
> Thanks
>
> Rakesh
> --- In l..., Olivier Gautherot wrote:
> >
> > Rakesh,
> >
> > from what the manual says, you can use SSP0 and SPI separately but not
> > simultaneously.
> >
> > Hope it helps
> > --
> > Olivier Gautherot
> > olivier@
> > 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
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> > >
> > >
> >
> >
> >
> >
>
I have a project running with both SSP and the SPI ports running fine.
Jeff
--- In l..., "rm_lucknow" wrote:
>
> Olivier,
> It might be possible to use both simultaneously - please see previous
> message in this tread :
> http://tech.groups.yahoo.com/group/lpc2000/message/57190
> .
> I only want a confirmation if it really works that way .
> Maybe nxp can pitch in with their views.
>
> Thanks
>
> Rakesh
> --- In l..., Olivier Gautherot wrote:
> >
> > Rakesh,
> >
> > from what the manual says, you can use SSP0 and SPI separately but not
> > simultaneously.
> >
> > Hope it helps
> > --
> > Olivier Gautherot
> > olivier@
> > 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
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> > >
> > >
> >
> >
> >
> >
>
Reply by ●February 12, 20132013-02-12
Thanks Jeff.
Rakesh
--- In l..., "ksdoubleshooter" wrote:
>
> Yes, you can use SSP0 and SPI ports simultaneously on the 100 pin LPC1700 parts. This also works with the 80 pin parts if you resolve the conflict with SSEL pin. I never use the SSEL function on either SSP or SPI ports. I use GPIO pins for the chip select functions.
>
> I have a project running with both SSP and the SPI ports running fine.
>
> Jeff
>
> --- In l..., "rm_lucknow" wrote:
> >
> > Olivier,
> > It might be possible to use both simultaneously - please see previous
> > message in this tread :
> > http://tech.groups.yahoo.com/group/lpc2000/message/57190
> > .
> > I only want a confirmation if it really works that way .
> > Maybe nxp can pitch in with their views.
> >
> > Thanks
> >
> > Rakesh
> > --- In l..., Olivier Gautherot wrote:
> > >
> > > Rakesh,
> > >
> > > from what the manual says, you can use SSP0 and SPI separately but not
> > > simultaneously.
> > >
> > > Hope it helps
> > > --
> > > Olivier Gautherot
> > > olivier@
> > > 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
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> >
> >
> >
> >
>
Rakesh
--- In l..., "ksdoubleshooter" wrote:
>
> Yes, you can use SSP0 and SPI ports simultaneously on the 100 pin LPC1700 parts. This also works with the 80 pin parts if you resolve the conflict with SSEL pin. I never use the SSEL function on either SSP or SPI ports. I use GPIO pins for the chip select functions.
>
> I have a project running with both SSP and the SPI ports running fine.
>
> Jeff
>
> --- In l..., "rm_lucknow" wrote:
> >
> > Olivier,
> > It might be possible to use both simultaneously - please see previous
> > message in this tread :
> > http://tech.groups.yahoo.com/group/lpc2000/message/57190
> > .
> > I only want a confirmation if it really works that way .
> > Maybe nxp can pitch in with their views.
> >
> > Thanks
> >
> > Rakesh
> > --- In l..., Olivier Gautherot wrote:
> > >
> > > Rakesh,
> > >
> > > from what the manual says, you can use SSP0 and SPI separately but not
> > > simultaneously.
> > >
> > > Hope it helps
> > > --
> > > Olivier Gautherot
> > > olivier@
> > > 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
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> >
> >
> >
> >
>
