code sanitization; button on TTGOv1

src/hal/ttgov1.h

@@ -1,6 +1,8 @@
-// Hardware related definitions for Heltec TTGOv1 board
+// Hardware related definitions for TTGOv1 board
 
-#define HAS_DISPLAY U8X8_SSD1306_128X64_NONAME_HW_I2C
+#define HAS_DISPLAY U8X8_SSD1306_128X64_NONAME_HW_I2C // OLED-Display on board
+#define HAS_LED GPIO_NUM_2 // white LED on board
+#define HAS_BUTTON GPIO_NUM_0 // button "PRG" on board
 #define CFG_sx1276_radio 1
 
 // re-define pin definitions of pins_arduino.h

src/hal/ttgov2.h

@@ -1,24 +1,24 @@
 // Hardware related definitions for TTGO V2 Board
 
 #define HAS_DISPLAY U8X8_SSD1306_128X64_NONAME_HW_I2C
-#define CFG_sx1276_radio 1
+#define CFG_sx1276_radio 1 // HPD13A LoRa SoC
 
 // re-define pin definitions of pins_arduino.h
-#define PIN_SPI_SS    18 // ESP32 GPIO18 (Pin18) -- SX1276 NSS (Pin19) SPI Chip Select Input
-#define PIN_SPI_MOSI  27 // ESP32 GPIO27 (Pin27) -- SX1276 MOSI (Pin18) SPI Data Input
-#define PIN_SPI_MISO  19 // ESP32 GPIO19 (Pin19) -- SX1276 MISO (Pin17) SPI Data Output
-#define PIN_SPI_SCK   5  // ESP32 GPIO5 (Pin5)   -- SX1276 SCK (Pin16) SPI Clock Input
+#define PIN_SPI_SS    18 // ESP32 GPIO18 (Pin18) -- HPD13A NSS/SEL (Pin4) SPI Chip Select Input
+#define PIN_SPI_MOSI  27 // ESP32 GPIO27 (Pin27) -- HPD13A MOSI/DSI (Pin6) SPI Data Input
+#define PIN_SPI_MISO  19 // ESP32 GPIO19 (Pin19) -- HPD13A MISO/DSO (Pin7) SPI Data Output
+#define PIN_SPI_SCK   5  // ESP32 GPIO5 (Pin5)   -- HPD13A SCK (Pin5) SPI Clock Input
 
 // non arduino pin definitions
-#define RST   LMIC_UNUSED_PIN // not sure
-#define DIO0  26 // wired on PCB
-#define DIO1  33 // needs to be wired external
-#define DIO2  32 // needs to be wired external (but not necessary for LoRa)
+#define RST   LMIC_UNUSED_PIN // connected to ESP32 RST/EN
+#define DIO0  26 // ESP32 GPIO26 wired on PCB to HPD13A
+#define DIO1  33 // HPDIO1 on pcb, needs to be wired external to GPIO33
+#define DIO2  32 // HPDIO2 on pcb, needs to be wired external to GPIO32 (not necessary for LoRa, only FSK)
 
 // Hardware pin definitions for TTGO V2 Board with OLED SSD1306 0,96" I2C Display
-#define OLED_RST U8X8_PIN_NONE // to be checked if really not connected
-#define OLED_SDA 21  // ESP32 GPIO4 (Pin4)   -- SD1306 Data
-#define OLED_SCL 22 // ESP32 GPIO15 (Pin15) -- SD1306 Clock
+#define OLED_RST U8X8_PIN_NONE // connected to CPU RST/EN
+#define OLED_SDA 21  // ESP32 GPIO4 (Pin4)   -- SD1306 D1+D2
+#define OLED_SCL 22 // ESP32 GPIO15 (Pin15) -- SD1306 D0
 
 
 /*