litex/software/videomixer/main.c

104 lines
2.4 KiB
C
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#include <stdio.h>
#include <irq.h>
#include <uart.h>
#include <hw/dvisampler.h>
static int d0, d1, d2;
static void calibrate_delays(void)
{
CSR_DVISAMPLER0_D0_DELAY_CTL = DVISAMPLER_DELAY_CAL;
CSR_DVISAMPLER0_D1_DELAY_CTL = DVISAMPLER_DELAY_CAL;
CSR_DVISAMPLER0_D2_DELAY_CTL = DVISAMPLER_DELAY_CAL;
while(CSR_DVISAMPLER0_D0_DELAY_BUSY || CSR_DVISAMPLER0_D1_DELAY_BUSY || CSR_DVISAMPLER0_D2_DELAY_BUSY);
CSR_DVISAMPLER0_D0_DELAY_CTL = DVISAMPLER_DELAY_RST;
CSR_DVISAMPLER0_D1_DELAY_CTL = DVISAMPLER_DELAY_RST;
CSR_DVISAMPLER0_D2_DELAY_CTL = DVISAMPLER_DELAY_RST;
CSR_DVISAMPLER0_D0_PHASE_RESET = 1;
CSR_DVISAMPLER0_D1_PHASE_RESET = 1;
CSR_DVISAMPLER0_D2_PHASE_RESET = 1;
d0 = d1 = d2 = 0;
printf("Delays calibrated\n");
}
static void adjust_phase(void)
{
switch(CSR_DVISAMPLER0_D0_PHASE) {
case DVISAMPLER_TOO_LATE:
CSR_DVISAMPLER0_D0_DELAY_CTL = DVISAMPLER_DELAY_DEC;
d0--;
CSR_DVISAMPLER0_D0_PHASE_RESET = 1;
break;
case DVISAMPLER_TOO_EARLY:
CSR_DVISAMPLER0_D0_DELAY_CTL = DVISAMPLER_DELAY_INC;
d0++;
CSR_DVISAMPLER0_D0_PHASE_RESET = 1;
break;
}
switch(CSR_DVISAMPLER0_D1_PHASE) {
case DVISAMPLER_TOO_LATE:
CSR_DVISAMPLER0_D1_DELAY_CTL = DVISAMPLER_DELAY_DEC;
d1--;
CSR_DVISAMPLER0_D1_PHASE_RESET = 1;
break;
case DVISAMPLER_TOO_EARLY:
CSR_DVISAMPLER0_D1_DELAY_CTL = DVISAMPLER_DELAY_INC;
d1++;
CSR_DVISAMPLER0_D1_PHASE_RESET = 1;
break;
}
switch(CSR_DVISAMPLER0_D2_PHASE) {
case DVISAMPLER_TOO_LATE:
CSR_DVISAMPLER0_D2_DELAY_CTL = DVISAMPLER_DELAY_DEC;
d2--;
CSR_DVISAMPLER0_D2_PHASE_RESET = 1;
break;
case DVISAMPLER_TOO_EARLY:
CSR_DVISAMPLER0_D2_DELAY_CTL = DVISAMPLER_DELAY_INC;
d2++;
CSR_DVISAMPLER0_D2_PHASE_RESET = 1;
break;
}
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printf("Ph: %4d %4d %4d // %d%d%d // %d\n", d0, d1, d2,
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CSR_DVISAMPLER0_D0_CHAR_SYNCED,
CSR_DVISAMPLER0_D1_CHAR_SYNCED,
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CSR_DVISAMPLER0_D2_CHAR_SYNCED,
CSR_DVISAMPLER0_CHAN_SYNCED);
}
static void vmix(void)
{
unsigned int counter;
while(1) {
while(!CSR_DVISAMPLER0_PLL_LOCKED);
printf("PLL locked\n");
calibrate_delays();
adjust_phase();
counter = 0;
while(CSR_DVISAMPLER0_PLL_LOCKED) {
counter++;
if(counter == 200000) {
adjust_phase();
counter = 0;
}
}
printf("PLL unlocked\n");
}
}
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int main(void)
{
irq_setmask(0);
irq_setie(1);
uart_init();
puts("Minimal video mixer software built "__DATE__" "__TIME__"\n");
vmix();
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return 0;
}