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videomixer: timeout on IDELAY busy
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Sebastien Bourdeauducq committed Jun 14, 2013
1 parent 279a145 commit cd910b8658e9f34370fcd52243f546ceaeaee7c5
Showing with 42 additions and 16 deletions.
  1. +40 −14 software/videomixer/dvisamplerX.c
  2. +2 −2 software/videomixer/dvisamplerX.h
@@ -85,67 +85,91 @@ void dvisamplerX_print_status(void)
dvisamplerX_resdetection_vres_read());
}

void dvisamplerX_calibrate_delays(void)
static int wait_idelays(void)
{
int ev;

ev = 0;
elapsed(&ev, 1);
while(dvisamplerX_data0_cap_dly_busy_read()
|| dvisamplerX_data1_cap_dly_busy_read()
|| dvisamplerX_data2_cap_dly_busy_read()) {
if(elapsed(&ev, identifier_frequency_read() >> 6) == 0) {
printf("IDELAY busy timeout\n");
return 0;
}
}
return 1;
}

int dvisamplerX_calibrate_delays(void)
{
dvisamplerX_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_CAL);
dvisamplerX_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_CAL);
dvisamplerX_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_CAL);
while(dvisamplerX_data0_cap_dly_busy_read()
|| dvisamplerX_data1_cap_dly_busy_read()
|| dvisamplerX_data2_cap_dly_busy_read());
if(!wait_idelays())
return 0;
dvisamplerX_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_RST);
dvisamplerX_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_RST);
dvisamplerX_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_RST);
dvisamplerX_data0_cap_phase_reset_write(1);
dvisamplerX_data1_cap_phase_reset_write(1);
dvisamplerX_data2_cap_phase_reset_write(1);
dvisamplerX_d0 = dvisamplerX_d1 = dvisamplerX_d2 = 0;
return 1;
}

void dvisamplerX_adjust_phase(void)
int 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());
if(!wait_idelays())
return 0;
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());
if(!wait_idelays())
return 0;
dvisamplerX_d0++;
dvisamplerX_data0_cap_phase_reset_write(1);
break;
}
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());
if(!wait_idelays())
return 0;
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());
if(!wait_idelays())
return 0;
dvisamplerX_d1++;
dvisamplerX_data1_cap_phase_reset_write(1);
break;
}
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());
if(!wait_idelays())
return 0;
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());
if(!wait_idelays())
return 0;
dvisamplerX_d2++;
dvisamplerX_data2_cap_phase_reset_write(1);
break;
}
return 1;
}

int dvisamplerX_init_phase(void)
@@ -157,8 +181,10 @@ int dvisamplerX_init_phase(void)
o_d0 = dvisamplerX_d0;
o_d1 = dvisamplerX_d1;
o_d2 = dvisamplerX_d2;
for(j=0;j<1000;j++)
dvisamplerX_adjust_phase();
for(j=0;j<1000;j++) {
if(!dvisamplerX_adjust_phase())
return 0;
}
if((abs(dvisamplerX_d0 - o_d0) < 4) && (abs(dvisamplerX_d1 - o_d1) < 4) && (abs(dvisamplerX_d2 - o_d2) < 4))
return 1;
}
@@ -180,7 +206,7 @@ int dvisamplerX_phase_startup(void)
printf("dvisamplerX: phase init OK\n");
return 1;
} else {
printf("dvisamplerX: phase did not settle\n");
printf("dvisamplerX: phase init failed\n");
if(attempts > 3) {
printf("dvisamplerX: giving up\n");
dvisamplerX_calibrate_delays();
@@ -4,8 +4,8 @@
void dvisamplerX_isr(void);
void dvisamplerX_init_video(void);
void dvisamplerX_print_status(void);
void dvisamplerX_calibrate_delays(void);
void dvisamplerX_adjust_phase(void);
int dvisamplerX_calibrate_delays(void);
int dvisamplerX_adjust_phase(void);
int dvisamplerX_init_phase(void);
int dvisamplerX_phase_startup(void);
void dvisamplerX_service(void);

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