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software/videomixer: improve phase calibration

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This commit is contained in:
Sebastien Bourdeauducq 2013-05-30 21:40:16 +02:00
parent 30f5ef8895
commit 7c95d253d9
2 changed files with 33 additions and 9 deletions
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41
software/videomixer/dvisamplerX.c
View file

@ -106,11 +106,13 @@ void dvisamplerX_adjust_phase(void)
switch(dvisamplerX_data0_cap_phase_read()) {
case DVISAMPLER_TOO_LATE:
dvisamplerX_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_DEC);
while(dvisamplerX_data0_cap_dly_busy_read());
dvisamplerX_d0--;
dvisamplerX_data0_cap_phase_reset_write(1);
break;
case DVISAMPLER_TOO_EARLY:
dvisamplerX_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_INC);
while(dvisamplerX_data0_cap_dly_busy_read());
dvisamplerX_d0++;
dvisamplerX_data0_cap_phase_reset_write(1);
break;
@ -118,11 +120,13 @@ void dvisamplerX_adjust_phase(void)
switch(dvisamplerX_data1_cap_phase_read()) {
case DVISAMPLER_TOO_LATE:
dvisamplerX_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_DEC);
while(dvisamplerX_data1_cap_dly_busy_read());
dvisamplerX_d1--;
dvisamplerX_data1_cap_phase_reset_write(1);
break;
case DVISAMPLER_TOO_EARLY:
dvisamplerX_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_INC);
while(dvisamplerX_data1_cap_dly_busy_read());
dvisamplerX_d1++;
dvisamplerX_data1_cap_phase_reset_write(1);
break;
@ -130,11 +134,13 @@ void dvisamplerX_adjust_phase(void)
switch(dvisamplerX_data2_cap_phase_read()) {
case DVISAMPLER_TOO_LATE:
dvisamplerX_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_DEC);
while(dvisamplerX_data2_cap_dly_busy_read());
dvisamplerX_d2--;
dvisamplerX_data2_cap_phase_reset_write(1);
break;
case DVISAMPLER_TOO_EARLY:
dvisamplerX_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_INC);
while(dvisamplerX_data2_cap_dly_busy_read());
dvisamplerX_d2++;
dvisamplerX_data2_cap_phase_reset_write(1);
break;
@ -158,13 +164,36 @@ int dvisamplerX_init_phase(void)
return 0;
}
int dvisamplerX_phase_startup(void)
{
int ret;
int attempts;
attempts = 0;
while(1) {
attempts++;
dvisamplerX_calibrate_delays();
printf("dvisamplerX: delays calibrated\n");
ret = dvisamplerX_init_phase();
if(ret) {
printf("dvisamplerX: phase init OK\n");
return 1;
} else {
printf("dvisamplerX: phase did not settle\n");
if(attempts > 3) {
printf("dvisamplerX: giving up\n");
dvisamplerX_calibrate_delays();
return 0;
}
}
}
}
static int dvisamplerX_locked;
static int dvisamplerX_last_event;
void dvisamplerX_service(void)
{
int ret;
if(dvisamplerX_locked) {
if(dvisamplerX_clocking_locked_read()) {
if(elapsed(&dvisamplerX_last_event, identifier_frequency_read()/2)) {
@ -178,13 +207,7 @@ void dvisamplerX_service(void)
} else {
if(dvisamplerX_clocking_locked_read()) {
printf("dvisamplerX: PLL locked\n");
dvisamplerX_calibrate_delays();
printf("dvisamplerX: delays calibrated\n");
ret = dvisamplerX_init_phase();
if(ret)
printf("dvisamplerX: phase init OK\n");
else
printf("dvisamplerX: phase did not settle\n");
dvisamplerX_phase_startup();
dvisamplerX_print_status();
dvisamplerX_locked = 1;
}

1
software/videomixer/dvisamplerX.h
View file

@ -7,6 +7,7 @@ void dvisamplerX_print_status(void);
void dvisamplerX_calibrate_delays(void);
void dvisamplerX_adjust_phase(void);
int dvisamplerX_init_phase(void);
int dvisamplerX_phase_startup(void);
void dvisamplerX_service(void);
#endif