Hello all,
I'm trying to run a small application that should active a Led on
M5235EVB (Coldfire), this is my code:
#include <stdio.h>
#define MCF_IPSBAR 0x40000000
#define MCF_GPIO_PODR_TIMER 0x0000000B
#define MCF_GPIO_PDDR_TIMER 0x0000001B
#define MCF_GPIO_PPDSDR_TIMER 0x0000002B
#define MCF_GPIO_PCLRR_TIMER 0x0000003B
#define MCF_GPIO_ASS_TIMER 0x0000004C
unsigned char *PT_Direction;
unsigned char *PT_Assign;
unsigned char *PT_Set;
int main(void)
{
printf("Go to registers!!!\n");
PT_Direction = (unsigned char *)(MCF_IPSBAR +
MCF_GPIO_PODR_TIMER);
PT_Assign = (unsigned char *)(MCF_IPSBAR +
MCF_GPIO_ASS_TIMER);
PT_Set = (unsigned char *)(MCF_IPSBAR +
MCF_GPIO_PPDSDR_TIMER);
printf("Write in the registers!!!\n");
*PT_Direction = 0xff;
*PT_Assign = 0;
*PT_Set = 0xff;
printf("Dome Test!!!\n");
return 0;
}
The output on console is:
Go to registers
Write in the registers
but the application is finished before to reach the end, I don't see the
output "Dome Test" and the leds is not actived, seem that when I try to
write in the GPIO registers the program is aborted, the strange is that
no error is showed by kernel.
What do I do wrong???
Regards,
Domenico Ferrari
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