I suspect that when you're running linux, you can't expect to service a hardware interrupt in user space.
Someone please correct me if I'm wrong.
Also, if I'm not mistaken, timer 1 is used by the kernel, and if you fiddle with
it, you can expect no good to come of it.
I'm currently working on an interrupt-driven project, and I'm using the code from
the file
gps_pps.tgz
from the files/example code area of the group as a template.
This shows how to write a kernel module which handles interrupts.
Rich
On Mon, Dec 29, 2008 at 1:25 AM, anadigpune <> wrote:
Dear All,
I am using TS-TPC-7390 SBC with the Ecllipse IDE.
Can anyone tell me how to use the timer interrupt with Ecllipse IDE.
I am posting what ever code i have written, but my code hangs
whenever the interrupt occurs.
void Timer(void) __attribute__ ((interrupt("IRQ")));
void main(void)
{
unsigned char *start;
int fd = open("/dev/mem", O_RDWR|O_SYNC);
start = mmap(0, getpagesize(), PROT_READ|PROT_WRITE, MAP_SHARED,
fd, 0x80840000);
PEDR = (unsigned int *)(start + 0x20); // port e data
PEDDR = (unsigned int *)(start + 0x24); // port e dir reg
start = mmap(0, getpagesize(), PROT_READ|PROT_WRITE, MAP_SHARED,
fd, 0x80810000);
T1LOAD = (unsigned int *)(start + 0x00);
T1VAL = (unsigned int *)(start + 0x04);
T1CTRL = (unsigned int *)(start + 0x08);
TC1EOI = (unsigned int *)(start + 0x0C);
start = mmap(0, getpagesize(), PROT_READ|PROT_WRITE, MAP_SHARED,
fd, 0x800B0000);
VIC1IntEnClear = (unsigned int *)(start + 0x14);
VIC1IntEnable = (unsigned int *)(start + 0x10);
VIC1VectAddr0 = (unsigned int *)(start + 0x100);
VIC1VectCntl0 = (unsigned int *)(start + 0x200);
*PEDDR = 0xff;
*PEDR = 0x00;
*T1LOAD = 0x07D0;
*T1CTRL = 0x0C;
*VIC1IntEnClear = 0x07F7FFFF;
*VIC1VectAddr0 = (unsigned int *)Timer;
*VIC1VectCntl0 = 0x20 | 4;
*VIC1IntEnable = 0x10;
.
.
close(fd);
}
void Timer(void)
{
*TC1EOI = 0x04;
*PEDR = 0xff;
sleep(2);
*PEDR = 0x00;
}
-- Rich Wilson
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