Hi,
Im an undergrad student, and a newbioe to the ARM. Im working on a board based on the AT91RM9200 uC. Im relying on the default boot program, and im using the xmodem protocol to load the foll. program thru hyperterminal. Im just sending a nibble to the I/O pins, expecting to verify the effect with a multimeter. but this isnt working:
#include int main() { __asm { start:MOV r1, #0xFFFFF800 //PIO C MOV r0,#0xF //only the last 4 pins needed STR r0, [r1] //send to PIO_PER MOV r0, #0 STR r0, [r1, #0x4] //send to PIO_PDR MOV r0, #0xF //output enabled on last 4 pins STR r0, [r1, #0x10]//send to PIO_OER MOV r0, #0 STR r0, [r1, #0x14] //send to PIO_ODR MOV r0, #0xF //sync output on last 4 pins STR r0, [r1, #0xA0] //send to PIO_OWER MOV r0, #0 STR r0, [r1, #0xA4] //send to PIO_OWDR MOV r0, #0xA STR r0, [r1, #0x38] //send this to the pins loop: B loop //infinite loop } }
after this ->
armcc -c test.c armlink test.o -o test.axf fromelf test.axf -bin -o test.bin
then i load this bin file onto the controller. But nothing happens..whats going on :-(
thanx in anticipation Mayank