DCF77 + IF482 code sanitizations

include/rtctime.h

@@ -22,7 +22,6 @@ time_t get_rtctime(void);
 float get_rtctemp(void);
 void IRAM_ATTR CLOCKIRQ();
 int pps_init(uint32_t pps_freq);
-int pps_init();
 void pps_start();
 uint8_t sync_clock(time_t t);
 

src/dcf77.cpp

@@ -6,7 +6,11 @@ https://www-user.tu-chemnitz.de/~heha/viewzip.cgi/hs/Funkuhr.zip/
 //
 */
 
-#if defined HAS_DCF77
+#ifdef HAS_DCF77
+
+#ifdef IF_482
+#error  "You must define at most one of IF482 or DCF_77"
+#endif
 
 #include "dcf77.h"
 
@@ -15,6 +19,11 @@ static const char TAG[] = "main";
 
 #define DCF77_FRAME_SIZE (60)
 #define DCF77_PULSE_DURATION (100)
+#ifdef RTC_CLK
+#define PPS (RTC_CLK / DCF77_PULSE_DURATION)
+#else
+#define PPS DCF77_PULSE_DURATION
+#endif
 
 // array of dcf pulses for three minutes
 uint8_t DCFtimeframe[DCF77_FRAME_SIZE];
@@ -37,12 +46,7 @@ int dcf77_init(void) {
 
   assert(ClockTask); // has clock task started?
 
-#if defined RTC_INT && (RTC_CLK == DCF77_PULSE_DURATION)
-  pps_init(); // use pps clock
-#else
-  pps_init(DCF77_PULSE_DURATION); // use esp32 clock
-#endif
-
+  pps_init(PPS);              // setup pulse
   DCF_Out(sync_clock(now())); // sync DCF time on next second
   pps_start();                // start pulse
 
@@ -118,10 +122,10 @@ void dcf77_loop(void *pvParameters) {
         &wakeTime,      // receives moment of call from isr
         portMAX_DELAY); // wait forever (missing error handling here...)
 
-#if !defined RTC_CLK || (RTC_CLK == DCF77_PULSE_DURATION) // we don't need clock rescaling
+#if (PPS == DCF77_PULSE_DURATION) // we don't need clock rescaling
     DCF_Out(0);
 #else // we need clock rescaling by software timer
-    for (uint8_t i = 1; i <= RTC_CLK / DCF77_PULSE_DURATION; i++) {
+    for (uint8_t i = 1; i <= PPS; i++) {
       DCF_Out(0);
       vTaskDelayUntil(&wakeTime, pdMS_TO_TICKS(DCF77_PULSE_DURATION));
     }

src/if482.cpp

@@ -1,5 +1,3 @@
-#if defined HAS_IF482
-
 /* NOTE:
 The IF482 Generator needs an high precise 1 Hz clock signal which cannot be
 acquired in suitable precision on the ESP32 SoC itself. Additional clocking
@@ -79,6 +77,12 @@ not evaluated by model BU-190
 */
 ///////////////////////////////////////////////////////////////////////////////
 
+#ifdef HAS_IF482
+
+#ifdef HAS_DCF77
+#error "You must define at most one of IF482 or DCF_77"
+#endif
+
 #include "if482.h"
 
 // Local logging tag
@@ -86,6 +90,11 @@ static const char TAG[] = "main";
 
 #define IF482_FRAME_SIZE (17)
 #define IF482_PULSE_DURATION (1000)
+#ifdef RTC_CLK
+#define PPS (RTC_CLK / IF482_PULSE_DURATION)
+#else
+#define PPS IF482_PULSE_DURATION
+#endif
 
 HardwareSerial IF482(2); // use UART #2 (note: #1 may be in use for serial GPS)
 
@@ -106,13 +115,8 @@ int if482_init(void) {
 
   assert(ClockTask); // has clock task started?
 
-#if defined RTC_INT && (RTC_CLK == IF482_PULSE_DURATION)
-  pps_init(); // use pps clock
-#else
-  pps_init(IF482_PULSE_DURATION); // use esp32 clock
-#endif
-
-  pps_start(); // start pulse
+  pps_init(PPS); // setup pulse
+  pps_start();   // start pulse
 
   return 1; // success
 } // if482_init
@@ -170,15 +174,14 @@ void if482_loop(void *pvParameters) {
         &wakeTime,      // receives moment of call from isr
         portMAX_DELAY); // wait forever (missing error handling here...)
 
-#if !defined RTC_CLK || (RTC_CLK == IF482_PULSE_DURATION) // we don't need clock rescaling
+#if (PPS == DCF77_PULSE_DURATION) // we don't need clock rescaling
     // wait until it's time to start transmit telegram for next second
     vTaskDelayUntil(&wakeTime, shotTime); // sets waketime to moment of shot
     IF482.print(IF482_Out(now() + 1));
-
 #else // we need clock rescaling by software timer
-                                 /*
-                                 not yet implemented for IF482
-                                 */
+    /*
+    not yet implemented for IF482
+    */
 #endif
   }
 } // if482_loop()

src/main.cpp

@@ -65,7 +65,7 @@ char display_line6[16], display_line7[16]; // display buffers
 uint8_t volatile channel = 0;              // channel rotation counter
 uint16_t volatile macs_total = 0, macs_wifi = 0, macs_ble = 0,
                   batt_voltage = 0; // globals for display
-bool volatile BitsPending = false; // DCF77 or IF482 ticker indicator
+bool volatile BitsPending = false;  // DCF77 or IF482 ticker indicator
 
 hw_timer_t *sendCycle = NULL, *homeCycle = NULL;
 #ifdef HAS_DISPLAY
@@ -416,9 +416,7 @@ void setup() {
   setSyncInterval(TIME_SYNC_INTERVAL_GPS * 60);
 #endif
 
-#if (defined HAS_IF482) && (defined DCF_77)
-#error "You may define at most one of HAS_IF482 or DCF_77"
-#elif defined HAS_IF482
+#ifdef HAS_IF482
   ESP_LOGI(TAG, "Starting IF482 Generator...");
   assert(if482_init());
 #elif defined HAS_DCF77

src/rtctime.cpp

@@ -1,15 +1,15 @@
-#ifdef HAS_RTC
-
 #include "rtctime.h"
 
 // Local logging tag
 static const char TAG[] = "main";
 
-RtcDS3231<TwoWire> Rtc(Wire); // RTC hardware i2c interface
-
 TaskHandle_t ClockTask;
 hw_timer_t *clockCycle = NULL;
 
+#ifdef HAS_RTC // we have hardware RTC
+
+RtcDS3231<TwoWire> Rtc(Wire); // RTC hardware i2c interface
+
 // initialize RTC
 int rtc_init(void) {
 
@@ -100,9 +100,11 @@ float get_rtctemp(void) {
   return 0;
 } // get_rtctemp()
 
-int pps_init() {
-// we have hardware pps signal as time base
-#if defined RTC_INT && defined RTC_CLK
+#endif // HAS_RTC
+
+int pps_init(uint32_t clk_freq_Hz) {
+// use fixed pulse clock as time base
+#if defined RTC_INT && (RTC_CLK == clk_freq_Hz)
 
   // setup external interupt for active low RTC INT pin
   pinMode(RTC_INT, INPUT_PULLUP);
@@ -118,21 +120,20 @@ int pps_init() {
     return 0; // failure
   }
   return 1; // success
-#endif
-}
 
-int pps_init(uint32_t pps_freq) {
-  // if we don't have hardware pps we use ESP32 hardware timer
-  if (pps_freq) {
+#else
+  // use clock with adjustable frequency
+  if (clk_freq_Hz) {
     ESP_LOGI(TAG, "Time base ESP32 clock");
     clockCycle = timerBegin(1, 8000, true); // set 80 MHz prescaler
     timerAttachInterrupt(clockCycle, &CLOCKIRQ, true);
-    timerAlarmWrite(clockCycle, 10 * pps_freq, true);
+    timerAlarmWrite(clockCycle, 100 * clk_freq_Hz, true);
   } else {
-    ESP_LOGE(TAG, "Invalid pps clock frequency");
+    ESP_LOGE(TAG, "Invalid pulse clock frequency");
     return 0; // failure
   }
   return 1; // success
+#endif
 }
 
 void pps_start() {
@@ -159,6 +160,4 @@ uint8_t sync_clock(time_t t) {
 void IRAM_ATTR CLOCKIRQ() {
   xTaskNotifyFromISR(ClockTask, xTaskGetTickCountFromISR(), eSetBits, NULL);
   portYIELD_FROM_ISR();
-}
-
-#endif // HAS_RTC
+}