Hello,
Does somebody has experience with the new Embedded artist development kit EA4357
?
I receive it last week, and if a load precompiled exemples it works
perfectly.
If I compile all exemples project with no change (Keil v4.60 + last CMSIS
version) it compile, I can load them into LPC4357 with J-Link but exemples
doesn't works.
I just put a scopemeter before FTDI chip and I see output signal at 750000 bps.
With precompiled version output run at 115200 ?
If I use a temrinal software on my computer and I select non standart baudrate
at 750000 it's working.
If you've got some ideas ?
Sebastien
Embedded artist LPC4357 board
Started by ●November 9, 2012
Reply by ●November 9, 20122012-11-09
Le 09/11/2012 15:06, sebfr74 a rit :
>
> Hello,
>
> Does somebody has experience with the new Embedded artist development
> kit EA4357 ?
> I receive it last week, and if a load precompiled exemples it works
> perfectly.
> If I compile all exemples project with no change (Keil v4.60 + last
> CMSIS version) it compile, I can load them into LPC4357 with J-Link
> but exemples doesn't works.
>
> I just put a scopemeter before FTDI chip and I see output signal at
> 750000 bps. With precompiled version output run at 115200 ?
>
> If I use a temrinal software on my computer and I select non standart
> baudrate at 750000 it's working.
>
> If you've got some ideas ?
>
> Sebastien
>
>
The problem comes from Keil version, with 4.54 it works fine...
>
> Hello,
>
> Does somebody has experience with the new Embedded artist development
> kit EA4357 ?
> I receive it last week, and if a load precompiled exemples it works
> perfectly.
> If I compile all exemples project with no change (Keil v4.60 + last
> CMSIS version) it compile, I can load them into LPC4357 with J-Link
> but exemples doesn't works.
>
> I just put a scopemeter before FTDI chip and I see output signal at
> 750000 bps. With precompiled version output run at 115200 ?
>
> If I use a temrinal software on my computer and I select non standart
> baudrate at 750000 it's working.
>
> If you've got some ideas ?
>
> Sebastien
>
>
The problem comes from Keil version, with 4.54 it works fine...
Reply by ●November 9, 20122012-11-09
----Original Message----
From: l...
[mailto:l...] On Behalf Of sebfr74 Sent:
09 November 2012 14:07 To: l...
Subject: [lpc2000] Embedded artist LPC4357 board
> Hello,
>
> Does somebody has experience with the new Embedded artist
> development kit EA4357 ?
> I receive it last week, and if a load precompiled
> exemples it works perfectly.
> If I compile all exemples project with no change (Keil
> v4.60 + last CMSIS version) it compile, I can load them
> into LPC4357 with J-Link but exemples doesn't works.
>
> I just put a scopemeter before FTDI chip and I see
> output signal at 750000 bps. With precompiled version
> output run at 115200 ?
>
> If I use a temrinal software on my computer and I select
> non standart baudrate at 750000 it's working.
>
> If you've got some ideas ?
Sounds like the clock/crystal is not configured correctly in your new project.
--
Tim Mitchell
From: l...
[mailto:l...] On Behalf Of sebfr74 Sent:
09 November 2012 14:07 To: l...
Subject: [lpc2000] Embedded artist LPC4357 board
> Hello,
>
> Does somebody has experience with the new Embedded artist
> development kit EA4357 ?
> I receive it last week, and if a load precompiled
> exemples it works perfectly.
> If I compile all exemples project with no change (Keil
> v4.60 + last CMSIS version) it compile, I can load them
> into LPC4357 with J-Link but exemples doesn't works.
>
> I just put a scopemeter before FTDI chip and I see
> output signal at 750000 bps. With precompiled version
> output run at 115200 ?
>
> If I use a temrinal software on my computer and I select
> non standart baudrate at 750000 it's working.
>
> If you've got some ideas ?
Sounds like the clock/crystal is not configured correctly in your new project.
--
Tim Mitchell
Reply by ●November 9, 20122012-11-09
Il 09/11/2012 15:06, sebfr74 ha scritto:
>
>
> Hello,
>
> Does somebody has experience with the new Embedded artist development
> kit EA4357 ?
> I receive it last week, and if a load precompiled exemples it works
> perfectly.
> If I compile all exemples project with no change (Keil v4.60 + last
> CMSIS version) it compile, I can load them into LPC4357 with J-Link
> but exemples doesn't works.
>
> I just put a scopemeter before FTDI chip and I see output signal at
> 750000 bps. With precompiled version output run at 115200 ?
>
> If I use a temrinal software on my computer and I select non standart
> baudrate at 750000 it's working.
>
> If you've got some ideas ?
>
I didn't work with the EA LPC4357 board but I was one of the first to
debug LPC4357 (NXP gave me its development kit containing an Hitex
board) so I will try to give you some indications:
1. check the example to see what main oscillator it uses; LPC4357 can
run at 204MHz and USART0-3 and UART1 use PCLK as the input clock for
prescaler.
2. try to read the user manual at 36.6.12 and see how to calculate the
baud rate so reading the register values and being that you were able to
find that the baud rate more or less is 750kbps you will be able to find
where is the mistake related to clock and baud rate.
3. In my personal opinion, before to start to use the LPC43xx is
necessary to study a little bit the clock and peripherals configuration
setup because the main source of problems of unexpected behavior is due
to misunderstandings about them.
> Sebastien
>
>
> Hello,
>
> Does somebody has experience with the new Embedded artist development
> kit EA4357 ?
> I receive it last week, and if a load precompiled exemples it works
> perfectly.
> If I compile all exemples project with no change (Keil v4.60 + last
> CMSIS version) it compile, I can load them into LPC4357 with J-Link
> but exemples doesn't works.
>
> I just put a scopemeter before FTDI chip and I see output signal at
> 750000 bps. With precompiled version output run at 115200 ?
>
> If I use a temrinal software on my computer and I select non standart
> baudrate at 750000 it's working.
>
> If you've got some ideas ?
>
I didn't work with the EA LPC4357 board but I was one of the first to
debug LPC4357 (NXP gave me its development kit containing an Hitex
board) so I will try to give you some indications:
1. check the example to see what main oscillator it uses; LPC4357 can
run at 204MHz and USART0-3 and UART1 use PCLK as the input clock for
prescaler.
2. try to read the user manual at 36.6.12 and see how to calculate the
baud rate so reading the register values and being that you were able to
find that the baud rate more or less is 750kbps you will be able to find
where is the mistake related to clock and baud rate.
3. In my personal opinion, before to start to use the LPC43xx is
necessary to study a little bit the clock and peripherals configuration
setup because the main source of problems of unexpected behavior is due
to misunderstandings about them.
> Sebastien
