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Possibly fix #2704 "Heltec Wireless Tracker screen doesn't display anything" (#2749)

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* fix #2704


Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
Co-authored-by: Jonathan Bennett <jbennett@incomsystems.biz>
This commit is contained in:
Thomas Göttgens
2023-10-05 05:24:25 +02:00
committed by GitHub
parent fbf74fc0b2
commit fc06754e1f
6 changed files with 155 additions and 9 deletions
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49
src/graphics/TFTDisplay.cpp
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@@ -1,4 +1,5 @@
#include "configuration.h"
#include "main.h"
#ifndef TFT_BACKLIGHT_ON
#define TFT_BACKLIGHT_ON HIGH
@@ -81,8 +82,16 @@ class LGFX : public lgfx::LGFX_Device
{
auto cfg = _light_instance.config(); // Gets a structure for backlight settings.
#ifdef ST7735_BL_V03
if (heltec_version == 3) {
cfg.pin_bl = ST7735_BL_V03;
} else {
cfg.pin_bl = ST7735_BL_V05;
}
#else
cfg.pin_bl = ST7735_BL; // Pin number to which the backlight is connected
cfg.invert = true; // true to invert the brightness of the backlight
#endif
cfg.invert = true; // true to invert the brightness of the backlight
// cfg.freq = 44100; // PWM frequency of backlight
// cfg.pwm_channel = 1; // PWM channel number to use
@@ -364,9 +373,23 @@ void TFTDisplay::sendCommand(uint8_t com)
// handle display on/off directly
switch (com) {
case DISPLAYON: {
#if defined(ST7735_BACKLIGHT_EN_V03) && defined(TFT_BACKLIGHT_ON)
if (heltec_version == 3) {
digitalWrite(ST7735_BACKLIGHT_EN_V03, TFT_BACKLIGHT_ON);
} else {
digitalWrite(ST7735_BACKLIGHT_EN_V05, TFT_BACKLIGHT_ON);
}
#endif
#if defined(TFT_BL) && defined(TFT_BACKLIGHT_ON)
digitalWrite(TFT_BL, TFT_BACKLIGHT_ON);
#endif
#ifdef VTFT_CTRL_V03
if (heltec_version == 3) {
digitalWrite(VTFT_CTRL_V03, LOW);
} else {
digitalWrite(VTFT_CTRL_V05, LOW);
}
#endif
#ifdef VTFT_CTRL
digitalWrite(VTFT_CTRL, LOW);
#endif
@@ -376,9 +399,23 @@ void TFTDisplay::sendCommand(uint8_t com)
break;
}
case DISPLAYOFF: {
#if defined(ST7735_BACKLIGHT_EN_V03) && defined(TFT_BACKLIGHT_ON)
if (heltec_version == 3) {
digitalWrite(ST7735_BACKLIGHT_EN_V03, !TFT_BACKLIGHT_ON);
} else {
digitalWrite(ST7735_BACKLIGHT_EN_V05, !TFT_BACKLIGHT_ON);
}
#endif
#if defined(TFT_BL) && defined(TFT_BACKLIGHT_ON)
digitalWrite(TFT_BL, !TFT_BACKLIGHT_ON);
#endif
#ifdef VTFT_CTRL_V03
if (heltec_version == 3) {
digitalWrite(VTFT_CTRL_V03, HIGH);
} else {
digitalWrite(VTFT_CTRL_V05, HIGH);
}
#endif
#ifdef VTFT_CTRL
digitalWrite(VTFT_CTRL, HIGH);
#endif
@@ -436,6 +473,16 @@ bool TFTDisplay::connect()
pinMode(TFT_BL, OUTPUT);
#endif
#ifdef ST7735_BACKLIGHT_EN_V03
if (heltec_version == 3) {
digitalWrite(ST7735_BACKLIGHT_EN_V03, TFT_BACKLIGHT_ON);
pinMode(ST7735_BACKLIGHT_EN_V03, OUTPUT);
} else {
digitalWrite(ST7735_BACKLIGHT_EN_V05, TFT_BACKLIGHT_ON);
pinMode(ST7735_BACKLIGHT_EN_V05, OUTPUT);
}
#endif
tft.init();
#if defined(M5STACK)
tft.setRotation(0);