Lpc2000

I started on a LPC2124 with 10MHz xtal, and none of the newlib-lpc
examples picking up the right baud rate. (of course after adjusting
SetNativeSpeed). 

Then I tried the UT040803A  example, no luck on 10MHz. Then I throw in
a 14.7456MHz xtal, and the UT040803A is working OK now. But the
newlib-lpc examples still not picking up the right baud rate. This is
how it's configured:

	SetNativeSpeed(14746uL);
	sp.baud   = 115200uL;
	sp.length = UART_WORD_LEN_8;
	sp.parity = UART_PARITY_NONE;
	sp.stop   = UART_STOP_BITS_1;
	SetMAM( 3u, MAM_full_enable);
	VPBControl(VPB_DIV1);
	SetDesiredSpeed(60000uL);

Is there any obvious reason why this is not working? (lpc_hello_rs232
from WinARM)?

Gabe

At 03:00 PM 10/10/04 +0000, you wrote:


>I started on a LPC2124 with 10MHz xtal, and none of the newlib-lpc
>examples picking up the right baud rate. (of course after adjusting
>SetNativeSpeed).
>
>Then I tried the UT040803A  example, no luck on 10MHz. Then I throw in
>a 14.7456MHz xtal, and the UT040803A is working OK now. But the
>newlib-lpc examples still not picking up the right baud rate. This is
>how it's configured:
>
>         SetNativeSpeed(14746uL);
>         sp.baud   = 115200uL;
>         sp.length = UART_WORD_LEN_8;
>         sp.parity = UART_PARITY_NONE;
>         sp.stop   = UART_STOP_BITS_1;
>         SetMAM( 3u, MAM_full_enable);
>         VPBControl(VPB_DIV1);
>         SetDesiredSpeed(60000uL);
>
>Is there any obvious reason why this is not working? (lpc_hello_rs232
>from WinARM)?

This doesn't actually set the baud rate anywhere.

 From the example test2.c

         /*  Set up serial port to desired rate.                         */
  (void)ioctl( fileno(stdout), UART_SETUP, &sp);

Until the ioctl call is made nothing has set the baud rate.

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,
be they legal, genetic, or physical.  If you don't believe me, try to
chew a radio signal. "

                         Kelvin Throop, III

FOr UT040803A, open 'config.h' and change the settings for FOSC,
PLL_MUL, and PBSD to the appropriate values.  The values already
in the code are for a 10MHz crystal and the PCLK for a correctly
configured 10MHz & 14.7456MHz crystals are only about 1.7% different.
That MIGHT allow the serial port to communicate with the same
settings.  Possibly your 10MHz crystal is not functional?

Regards
-Bill Knight
www.theARMPatch.com

On Sun, 10 Oct 2004 15:00:59 -0000, ggindele wrote:

I started on a LPC2124 with 10MHz xtal, and none of the newlib-lpc
examples picking up the right baud rate. (of course after adjusting
SetNativeSpeed). 

Then I tried the UT040803A  example, no luck on 10MHz. Then I throw in
a 14.7456MHz xtal, and the UT040803A is working OK now. But the
newlib-lpc examples still not picking up the right baud rate. This is
how it's configured:

	SetNativeSpeed(14746uL);
	sp.baud   = 115200uL;
	sp.length = UART_WORD_LEN_8;
	sp.parity = UART_PARITY_NONE;
	sp.stop   = UART_STOP_BITS_1;
	SetMAM( 3u, MAM_full_enable);
	VPBControl(VPB_DIV1);
	SetDesiredSpeed(60000uL);

Is there any obvious reason why this is not working? (lpc_hello_rs232
from WinARM)?

Gabe