Works with 16 bit ADC in 1PPS mode

src/fe/controllerIop.c

@@ -662,6 +662,8 @@ void fe_start_controller( void )
     int duotone_full_cycle_offset = duotone_offset;
 #endif //UNDERSAMPLE > 4
 
+    /// prime the ADC read module to setup time_shift
+    iop_adc_setup_timeshift();
 
 
     // Run forever

src/include/drv/iop_adc_functions.c

@@ -41,7 +41,7 @@ static int first_adc_read = 0;
 /// After the ADCs are initialized, but before the first sample is read
 /// Start the time_shift process
 void
-iop_adc_setup_timeshift() {
+iop_adc_setup_timeshift(void) {
   first_adc_read = 2;
 }
 
@@ -49,18 +49,20 @@ iop_adc_setup_timeshift() {
 int
 iop_adc_timeshift_dma_size(int adc)
 {
-  switch ( cdsPciModules.adcType[ jj ] )
+  int dma_bytes = 0;
+  int samples=0;
+  switch ( cdsPciModules.adcType[ adc ] )
   {
     case GSC_18AI32SSC1M:
     case GSC_18AI64SSC:
-      if(cdsPciModules.adcTimeShift[ jj ] < UNDERSAMPLE)
+      if(cdsPciModules.adcTimeShift[ adc ] < UNDERSAMPLE)
       {
-        samples = cdsPciModules.adcChannels[ jj ]
-                  * (UNDERSAMPLE-cdsPciModules.adcTimeShift[jj]);
+        samples = cdsPciModules.adcChannels[ adc ]
+                  * (UNDERSAMPLE-cdsPciModules.adcTimeShift[adc]);
       }
       else
       {
-        samples = cdsPciModules.adcChannels[ jj ] * UNDERSAMPLE;
+        samples = cdsPciModules.adcChannels[ adc ] * UNDERSAMPLE;
       }
       dma_bytes = samples * 4;
       break;
@@ -549,6 +551,7 @@ iop_adc_read( adcInfo_t* adcinfo, uint64_t cpuClock[] )
     }
     if (first_adc_read > 0) {
       first_adc_read -= 1;
+      RTSLOG_INFO("first adc read = %d", first_adc_read);
     }
     return 0;
 }

src/include/drv/iop_adc_functions.h

@@ -10,6 +10,9 @@ extern "C" {
 int iop_adc_init( adcInfo_t* );
 int iop_adc_read( adcInfo_t*, unsigned long long[] );
 int iop_adc_sync_cards( adcInfo_t* adcinfo );
+void iop_adc_setup_timeshift(void);
+int iop_adc_timeshift_dma_size(int adc);
+
 
 #ifdef __cplusplus
 }