Heltec-Tracker: TFT LCD support (#2612)

* Heltec-Tracker: TFT LCD support

* trunk fmt

* backwards compatibility  with ST7735 devices

* trunk fmt

variants/heltec_wireless_tracker/platformio.ini

@@ -1,23 +1,12 @@
 [env:heltec-wireless-tracker]
 extends = esp32s3_base
 board = heltec_wifi_lora_32_V3
+upload_protocol = esp-builtin
+
 build_flags = 
   ${esp32s3_base.build_flags} -D HELTEC_WIRELESS_TRACKER -I variants/heltec_wireless_tracker
-  -DUSER_SETUP_LOADED
-  -DTFT_WIDTH=80
-  -DTFT_HEIGHT=160
-  -DST7735_GREENTAB160x80
-  -DST7735_DRIVER
-  ;-TFT_RGB_ORDER=TFT_BGR
-  -DTFT_CS=38
-  -DTFT_DC=40
-  -DTFT_RST=39
-  -DTFT_WR=42
-  -DTFT_SCLK=41
-  ;-DSPI_FREQUENCY=40000000
-  ;-DSPI_FREQUENCY=27000000
-  ;-DSPI_READ_FREQUENCY=16000000
-  ;-DDISABLE_ALL_LIBRARY_WARNINGS
+   -DARDUINO_USB_CDC_ON_BOOT=1
+
 lib_deps =
   ${esp32s3_base.lib_deps}
-  bodmer/TFT_eSPI@^2.4.76
+  lovyan03/LovyanGFX@^1.1.7

variants/heltec_wireless_tracker/variant.h

@@ -1,18 +1,25 @@
 #define LED_PIN 18
 
-#define TFT_POWER_EN 46
-
-#define ST7735_RESET 39 // Output
+// ST7735S TFT LCD
+#define ST7735S 1 // there are different (sub-)versions of ST7735
 #define ST7735_CS 38
-#define ST7735_BACKLIGHT_EN 45
-#define ST7735_RS 40
-#define ST7735_SDA 42
+#define ST7735_RS 40  // DC
+#define ST7735_SDA 42 // MOSI
 #define ST7735_SCK 41
-
-// #define RESET_OLED 21
-// #define I2C_SDA 17 // I2C pins for this board
-// #define I2C_SCL 18
-
+#define ST7735_RESET 39
+#define ST7735_MISO -1
+#define ST7735_BUSY -1
+#define ST7735_BL 45
+#define ST7735_SPI_HOST SPI3_HOST
+#define ST7735_BACKLIGHT_EN 45
+#define SPI_FREQUENCY 40000000
+#define SPI_READ_FREQUENCY 16000000
+#define SCREEN_ROTATE
+#define TFT_HEIGHT 160
+#define TFT_WIDTH 80
+#define TFT_OFFSET_X 26
+#define TFT_OFFSET_Y 0
+#define VTFT_CTRL 46                  // Heltec Tracker needs this pulled low for TFT
 #define SCREEN_TRANSITION_FRAMERATE 1 // fps
 
 #define VEXT_ENABLE Vext // active low, powers the oled display and the lora antenna boost
@@ -31,8 +38,6 @@
 #define PIN_GPS_PPS 36
 #define VGNSS_CTRL 37 // Heltec Tracker needs this pulled low for GPS
 
-#define VTFT_CTRL 46 // Heltec Tracker needs this pulled low for TFT
-
 #define USE_SX1262
 
 #define LORA_DIO0 -1 // a No connect on the SX1262 module