lpc 2129 program not responding

[fiyasmp]

hi all,

my lpc2129 does't respond to the program. but i can program it with lpc2000 flash utility. but when i compare the flash it says "compare the flash failed".

my program for led on is

int main()
{
IODIR0=0xc;
IOSET0=0xc;
while(1);
}

i put the P0.14 in high state...have to make any other pins high/low?..plz help me..

 

[john blue]

Did you configure the pins properly first?

 

[fiyasmp]

you mean configure using PINSEL ??

whether i have to use any other register to configure??

 

[john blue]

P0.14 DCD1 Data Carrier Detect input for UART1.
EINT1 External interrupt 1 input. LOW on this pine while RESET is LOW
forces on-chip boot-loader to take over control of the part after reset.

P0.14 is for interrupt and uart

You can use this for general I/O:

44 O P1.21 PIPESTAT0 Pipeline Status, bit 0. Standard I/O port with internal pull-up.
40 O P1.22 PIPESTAT1 Pipeline Status, bit 1. Standard I/O port with internal pull-up.
36 O P1.23 PIPESTAT2 Pipeline Status, bit 2. Standard I/O port with internal pull-up.

 

[john blue]

As well as this:

Port 1: Port 1 is a 32-bit bi-directional I/O port with individual direction controls for each bit. The
operation of port 1 pins depends upon the pin function selected via the Pin Connect Block.
Only pins 16 through 31 of port 1 are available.

 

[fiyasmp]

my device sometimes work and sometimes don't....

what's the reason for this?

 

[fiyasmp]

is the pins need any external pull-up?