Hello,
I am trying to do an interruption of a video signal. I am using the hsmc quad video card of Bitec associated to a cyclone III C25 Altera card. An interruption is supposed to be generated at each frame.
First of all, I don't really understand what is the context, and what I should put in the edge_capture variable.
I tried to adapt the interuption program which worked on buttons but no success. It should print "coincoin" whenever an interruption occurs. I put below the parts of my program corresponding to the interruption. Tell me if you need more details.
Thanks for helping,
Myriam
Program :
volatile int pouet=0;
volatile int edge_capture;
static void handle_DMA_interrupts(void* context, alt_u32 id)
{
volatile int* edge_capture_ptr = (volatile int*) context;
if (pouet==0) pouet = 1;
}
Then in, the main :
...
IOWR(video_in_base[0], 0x0, 0x08 ); // enable bit for interrupt
IOWR_ALTERA_AVALON_PIO_IRQ_MASK(VIDEO_1_BASE, 0x01);
alt_irq_register( VIDEO_1_IRQ,&edge_capture, handle_DMA_interrupts );
while ( 1 == 1 )
{
if (pouet == 1)
{printf("coincoin");
pouet == 0;
}
...
}
