preparations for changing gps library

src/hal/ttgobeam.h

@@ -19,8 +19,14 @@
 #define HAS_BUTTON GPIO_NUM_39 // on board button (next to reset)
 #define HAS_BATTERY_PROBE ADC1_GPIO35_CHANNEL // battery probe GPIO pin -> ADC1_CHANNEL_7
 #define BATT_FACTOR 2 // voltage divider 100k/100k on board
+
+// GPS settings
 #define HAS_GPS 1 // use on board GPS
 #define GPS_SERIAL 9600, SERIAL_8N1, GPIO_NUM_12, GPIO_NUM_15 // UBlox NEO 6M or 7M with default configuration
+// to use 
+#define GPS_INT GPIO_NUM_34 // 30ns accurary timepulse, to be external wired on pcb: R34 -> GPIO34
+// 1 pulse per second, synchronized at rising edge, pulse length 100ms, accuracy +/- 3 *e-8 [nanoseconds] = 0,95sec / year
+#define GPS_CLK (1000)
 
 // enable only if device has these sensors, otherwise comment these lines
 // BME680 sensor on I2C bus
@@ -35,7 +41,11 @@
 //#define DISPLAY_FLIP  1 // use if display is rotated
 
 // Settings for DCF77 interface
-#define HAS_DCF77 GPIO_NUM_13
+//#define HAS_DCF77 GPIO_NUM_13
+
+// Settings for IF482 interface
+#define HAS_IF482 9600, SERIAL_7E1, GPIO_NUM_12, GPIO_NUM_14 // IF482 serial port parameters
+
 
 // user defined sensors (if connected)
 //#define HAS_SENSORS 1 // comment out if device has user defined sensors

src/hal/ttgofox.h

@@ -20,12 +20,17 @@
 #define MY_OLED_SCL (22)
 #define MY_OLED_RST U8X8_PIN_NONE
 
-// Pins for on board DS3231 RTC chip
+// Settings for on board DS3231 RTC chip
 #define HAS_RTC MY_OLED_SDA, MY_OLED_SCL // SDA, SCL
-#define RTC_INT GPIO_NUM_34 // interrupt input from rtc
+//#define RTC_INT GPIO_NUM_34 // timepulse with accuracy +/- 2*e-6 [microseconds] = 0,1728sec / day
+//#define RTC_CLK (1000) // frequency of RTC clock signal in ms
 
 // Settings for IF482 interface
-#define HAS_IF482 9600, SERIAL_7E1, GPIO_NUM_12, GPIO_NUM_14 // IF482 serial port parameters
+//#define HAS_IF482 9600, SERIAL_7E1, GPIO_NUM_12, GPIO_NUM_14 // IF482 serial port parameters
+
+// Settings for DCF77 interface
+#define HAS_DCF77 GPIO_NUM_14
+#define DCF77_ACTIVE_LOW 1
 
 // Settings for external GPS chip
 #define HAS_GPS 1 // use on board GPS