problem with UART0 on Olimex LPC2103 board

Development Boards MicroMod
1

hello,

Are there someone who have used the UART0 on an Olimex board. I am working with an Olimex LPC2103 board and when I tried their example of the UART0, it doesn’t work.

The problem is when I connect the serial cable on my PC, the Olimex serial port send me a lot of data, even if I don’t begin to compile and run the program.

I think that the board must be crazy, because it send me data whereas it doesn’t begin to work.

thank you for your help.

2

I’m not familair with this board, but it sounds like the ISP flash programming routine may have been activated? Is there a DIP switch on the board to control this?

Eric

3

On the board I have only a JRST jumper, a BSL jumper, and a DEBUG jumper. It’s a very small board and there is no datasheet on it.

It is very stange, because when I connect a Olimex LPC2106 board, I don’t meet this problem.

thanks

4

I checked in several forum and tried programs examples given by constructors, but I can make the UART0 works. Below is my code, it works, but it transmits wrong data:

#include <targets/LPC210x.h>

int main(void)

{

PINSEL0 = 0x00000001; //enable UART0_TX

IODIR = 0x00000001; // P0.0 as an output for serial UART0_TX

/* Configure UART */ // no using PLL

U0IER=0x00; // disable all interrupts

//U0FCR=0x07;

U0LCR=0x83; //8 bit, 1 stop bit, no parity, enable DLAB

U0DLL=93; // for 9600 baud at 14,7456MHz

U0DLM=0x00;

U0LCR=0x03; // disable DLAB

//while((U0LSR & 0x40) == 0){}

U0THR = ‘H’; // transmit ‘H’

return 0;

}

it transmits : ’ û ', or ’ þ ’ or ’ ÿ ', it changes at each time

thanks for your help

5

Check your PC terminal settings, garbage data will be received if the RS232 parameters are not set same on PC and LPC2103 board.

The examples on our web are tested and work fine

Tsvetan