LPC2129 - Troubles getting board running

Development Boards MicroMod
1

Hi,

I have designed my own LPC2129 board. I program it using the Olimex openOCD USB JTAG and GCC.

I previously worked with an LPC2148 and I was very happy with my development tool chain. I was able to bring up an LPC2148 board from Olimex very quickly. However I am having a very hard time developing with this LPC2129-based board.

I can program the LPC2129 and step through the code ok. However I have noticed that the board tends to suddenly die, for no obvious reasons (at least in my eyes).

An example here (the UART code I use comes form the GNUARM website):

This loop works fine, it would print stuff on the UART port for ever…

unsigned int cnt = 0;
while(1 == 1)
{
uart0Puts(“before time loop\r\n”);
for(cnt = 0; cnt < 1000; cnt++)
{}
uart0Puts(“after time loop\r\n”);
}

Surprisingly the following code does not run (note the time wait counts up to 10000 this time):

unsigned int cnt = 0;
while(1 == 1)
{
uart0Puts(“before time loop\r\n”);
for(cnt = 0; cnt < 10000; cnt++)
{}
uart0Puts(“after time loop\r\n”);
}

This loops a few times, then the CPU seems to halt…

I do not enable the watchdog.

Am I missing something?

Any suggestion?

2

Can you verify this?

do “mdw ” from openOCD to verify that watcdog disable actually took affect.

jeanseb:
I do not enable the watchdog.