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