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Restore official Waveshare display register init sequence and LEDC backlight driver to fix blank display screen

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This commit is contained in:
drjones
2026-07-04 02:57:45 -07:00
parent 632704318e
commit a1aef8d0ea
4 changed files with 114 additions and 203 deletions
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286
sound_picture_app/Display_ST7789.cpp
View File

@@ -3,6 +3,7 @@
SPIClass LCDspi(FSPI);
#define SPI_WRITE(_dat) LCDspi.transfer(_dat)
#define SPI_WRITE_Word(_dat) LCDspi.transfer16(_dat)
void SPI_Init()
{
LCDspi.begin(EXAMPLE_PIN_NUM_SCLK, EXAMPLE_PIN_NUM_MISO, EXAMPLE_PIN_NUM_MOSI);
@@ -17,6 +18,7 @@ void LCD_WriteCommand(uint8_t Cmd)
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, HIGH);
LCDspi.endTransaction();
}
void LCD_WriteData(uint8_t Data)
{
LCDspi.beginTransaction(SPISettings(SPIFreq, MSBFIRST, SPI_MODE0));
@@ -26,6 +28,7 @@ void LCD_WriteData(uint8_t Data)
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, HIGH);
LCDspi.endTransaction();
}
void LCD_WriteData_Word(uint16_t Data)
{
LCDspi.beginTransaction(SPISettings(SPIFreq, MSBFIRST, SPI_MODE0));
@@ -35,6 +38,7 @@ void LCD_WriteData_Word(uint16_t Data)
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, HIGH);
LCDspi.endTransaction();
}
void LCD_WriteData_nbyte(uint8_t* SetData, uint8_t* ReadData, uint32_t Size)
{
LCDspi.beginTransaction(SPISettings(SPIFreq, MSBFIRST, SPI_MODE0));
@@ -54,6 +58,7 @@ void LCD_Reset(void)
digitalWrite(EXAMPLE_PIN_NUM_LCD_RST, HIGH);
delay(50);
}
void LCD_Init(void)
{
pinMode(EXAMPLE_PIN_NUM_LCD_CS, OUTPUT);
@@ -62,192 +67,107 @@ void LCD_Init(void)
Backlight_Init();
SPI_Init();
// Reset LCD
digitalWrite(EXAMPLE_PIN_NUM_LCD_RST, LOW);
delay(10);
digitalWrite(EXAMPLE_PIN_NUM_LCD_RST, HIGH);
delay(50);
LCD_Reset();
//************* JD9853 Start Initial Sequence **********//
LCD_WriteCommand(0x11); // Sleep Out
//************* Start Initial Sequence **********//
LCD_WriteCommand(0x11);
delay(120);
LCD_WriteCommand(0xDF);
LCD_WriteData(0x98);
LCD_WriteData(0x53);
LCD_WriteCommand(0xB2);
LCD_WriteData(0x23);
LCD_WriteCommand(0xB7);
LCD_WriteData(0x00);
LCD_WriteData(0x47);
LCD_WriteData(0x00);
LCD_WriteData(0x6F);
LCD_WriteCommand(0xBB);
LCD_WriteData(0x1C);
LCD_WriteData(0x1A);
LCD_WriteData(0x55);
LCD_WriteData(0x73);
LCD_WriteData(0x63);
LCD_WriteData(0xF0);
LCD_WriteCommand(0xC0);
LCD_WriteData(0x44);
LCD_WriteData(0xA4);
LCD_WriteCommand(0xC1);
LCD_WriteData(0x16);
LCD_WriteCommand(0xC3);
LCD_WriteData(0x7D);
LCD_WriteData(0x07);
LCD_WriteData(0x14);
LCD_WriteData(0x06);
LCD_WriteData(0xCF);
LCD_WriteData(0x71);
LCD_WriteData(0x72);
LCD_WriteData(0x77);
LCD_WriteCommand(0xC4);
LCD_WriteData(0x00);
LCD_WriteData(0x00);
LCD_WriteData(0xA0);
LCD_WriteData(0x79);
LCD_WriteData(0x0B);
LCD_WriteData(0x0A);
LCD_WriteData(0x16);
LCD_WriteData(0x79);
LCD_WriteData(0x0B);
LCD_WriteData(0x0A);
LCD_WriteData(0x16);
LCD_WriteData(0x82);
LCD_WriteCommand(0xC8);
const uint8_t c8_data[] = {
0x3F, 0x32, 0x29, 0x29, 0x27, 0x2B, 0x27, 0x28, 0x28, 0x26, 0x25, 0x17, 0x12, 0x0D, 0x04, 0x00,
0x3F, 0x32, 0x29, 0x29, 0x27, 0x2B, 0x27, 0x28, 0x28, 0x26, 0x25, 0x17, 0x12, 0x0D, 0x04, 0x00
};
for (int i = 0; i < 32; i++) {
LCD_WriteData(c8_data[i]);
}
LCD_WriteCommand(0xD0);
LCD_WriteData(0x04);
LCD_WriteData(0x06);
LCD_WriteData(0x6B);
LCD_WriteData(0x0F);
LCD_WriteData(0x00);
LCD_WriteCommand(0xD7);
LCD_WriteData(0x00);
LCD_WriteData(0x30);
LCD_WriteCommand(0xE6);
LCD_WriteData(0x14);
LCD_WriteCommand(0xDE);
LCD_WriteData(0x01);
LCD_WriteCommand(0xB7);
LCD_WriteData(0x03);
LCD_WriteData(0x13);
LCD_WriteData(0xEF);
LCD_WriteData(0x35);
LCD_WriteData(0x35);
LCD_WriteCommand(0xC1);
LCD_WriteData(0x14);
LCD_WriteData(0x15);
LCD_WriteData(0xC0);
LCD_WriteCommand(0xC2);
LCD_WriteData(0x06);
LCD_WriteData(0x3A);
LCD_WriteCommand(0xC4);
LCD_WriteData(0x72);
LCD_WriteData(0x12);
LCD_WriteCommand(0xBE);
LCD_WriteData(0x00);
LCD_WriteCommand(0xDE);
LCD_WriteData(0x02);
LCD_WriteCommand(0xE5);
LCD_WriteData(0x00);
LCD_WriteData(0x02);
LCD_WriteData(0x00);
LCD_WriteCommand(0xE5);
LCD_WriteData(0x01);
LCD_WriteData(0x02);
LCD_WriteData(0x00);
LCD_WriteCommand(0xDE);
LCD_WriteData(0x00);
LCD_WriteCommand(0x35);
LCD_WriteData(0x00);
LCD_WriteCommand(0x3A);
LCD_WriteData(0x05);
LCD_WriteCommand(0x2A);
LCD_WriteData(0x00);
LCD_WriteData(0x22);
LCD_WriteData(0x00);
LCD_WriteData(0xCD);
LCD_WriteCommand(0x2B);
LCD_WriteData(0x00);
LCD_WriteData(0x00);
LCD_WriteData(0x01);
LCD_WriteData(0x3F);
LCD_WriteCommand(0xDE);
LCD_WriteData(0x02);
LCD_WriteCommand(0xE5);
LCD_WriteData(0x00);
LCD_WriteData(0x02);
LCD_WriteData(0x00);
LCD_WriteCommand(0xDE);
LCD_WriteData(0x00);
LCD_WriteCommand(0x36); // Rotation control
LCD_WriteCommand(0x36);
if (HORIZONTAL)
LCD_WriteData(0x00);
else
LCD_WriteData(0x70);
LCD_WriteCommand(0x21); // Display Inversion On
LCD_WriteCommand(0x3A);
LCD_WriteData(0x05);
delay(10);
LCD_WriteCommand(0x29); // Display On
LCD_WriteCommand(0xB0);
LCD_WriteData(0x00);
LCD_WriteData(0xE8);
LCD_WriteCommand(0xB2);
LCD_WriteData(0x0C);
LCD_WriteData(0x0C);
LCD_WriteData(0x00);
LCD_WriteData(0x33);
LCD_WriteData(0x33);
LCD_WriteCommand(0xB7);
LCD_WriteData(0x35);
LCD_WriteCommand(0xBB);
LCD_WriteData(0x35);
LCD_WriteCommand(0xC0);
LCD_WriteData(0x2C);
LCD_WriteCommand(0xC2);
LCD_WriteData(0x01);
LCD_WriteCommand(0xC3);
LCD_WriteData(0x13);
LCD_WriteCommand(0xC4);
LCD_WriteData(0x20);
LCD_WriteCommand(0xC6);
LCD_WriteData(0x0F);
LCD_WriteCommand(0xD0);
LCD_WriteData(0xA4);
LCD_WriteData(0xA1);
LCD_WriteCommand(0xD6);
LCD_WriteData(0xA1);
LCD_WriteCommand(0xE0);
LCD_WriteData(0xF0);
LCD_WriteData(0x00);
LCD_WriteData(0x04);
LCD_WriteData(0x04);
LCD_WriteData(0x04);
LCD_WriteData(0x05);
LCD_WriteData(0x29);
LCD_WriteData(0x33);
LCD_WriteData(0x3E);
LCD_WriteData(0x38);
LCD_WriteData(0x12);
LCD_WriteData(0x12);
LCD_WriteData(0x28);
LCD_WriteData(0x30);
LCD_WriteCommand(0xE1);
LCD_WriteData(0xF0);
LCD_WriteData(0x07);
LCD_WriteData(0x0A);
LCD_WriteData(0x0D);
LCD_WriteData(0x0B);
LCD_WriteData(0x07);
LCD_WriteData(0x28);
LCD_WriteData(0x33);
LCD_WriteData(0x3E);
LCD_WriteData(0x36);
LCD_WriteData(0x14);
LCD_WriteData(0x14);
LCD_WriteData(0x29);
LCD_WriteData(0x32);
LCD_WriteCommand(0x21);
LCD_WriteCommand(0x11);
delay(120);
LCD_WriteCommand(0x29);
}
/******************************************************************************
function: Set the cursor position
parameter :
Xstart: Start uint16_t x coordinate
Ystart: Start uint16_t y coordinate
Xend : End uint16_t coordinates
Yend : End uint16_t coordinatesen
******************************************************************************/
void LCD_SetCursor(uint16_t Xstart, uint16_t Ystart, uint16_t Xend, uint16_t Yend)
{
if (HORIZONTAL) {
// set the X coordinates
LCD_WriteCommand(0x2A);
LCD_WriteData(Xstart >> 8);
LCD_WriteData(Xstart + Offset_X);
LCD_WriteData(Xend >> 8);
LCD_WriteData(Xend + Offset_X);
// set the Y coordinates
LCD_WriteCommand(0x2B);
LCD_WriteData(Ystart >> 8);
LCD_WriteData(Ystart + Offset_Y);
@@ -255,13 +175,12 @@ void LCD_SetCursor(uint16_t Xstart, uint16_t Ystart, uint16_t Xend, uint16_t Ye
LCD_WriteData(Yend + Offset_Y);
}
else {
// set the X coordinates
LCD_WriteCommand(0x2A);
LCD_WriteData(Ystart >> 8);
LCD_WriteData(Ystart + Offset_Y);
LCD_WriteData(Yend >> 8);
LCD_WriteData(Yend + Offset_Y);
// set the Y coordinates
LCD_WriteCommand(0x2B);
LCD_WriteData(Xstart >> 8);
LCD_WriteData(Xstart + Offset_X);
@@ -270,15 +189,7 @@ void LCD_SetCursor(uint16_t Xstart, uint16_t Ystart, uint16_t Xend, uint16_t Ye
}
LCD_WriteCommand(0x2C);
}
/******************************************************************************
function: Refresh the image in an area
parameter :
Xstart: Start uint16_t x coordinate
Ystart: Start uint16_t y coordinate
Xend : End uint16_t coordinates
Yend : End uint16_t coordinates
color : Set the color
******************************************************************************/
void LCD_addWindow(uint16_t Xstart, uint16_t Ystart, uint16_t Xend, uint16_t Yend, uint16_t* color)
{
uint16_t Show_Width = Xend - Xstart + 1;
@@ -293,19 +204,16 @@ void LCD_addWindow(uint16_t Xstart, uint16_t Ystart, uint16_t Xend, uint16_t Yen
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, HIGH);
LCDspi.endTransaction();
}
// backlight
void Backlight_Init(void)
{
pinMode(EXAMPLE_PIN_NUM_BK_LIGHT, OUTPUT);
digitalWrite(EXAMPLE_PIN_NUM_BK_LIGHT, HIGH); // Set backlight to full brightness
ledcAttach(EXAMPLE_PIN_NUM_BK_LIGHT, Frequency, Resolution);
ledcWrite(EXAMPLE_PIN_NUM_BK_LIGHT, 100);
}
void Set_Backlight(uint8_t Light) //
void Set_Backlight(uint8_t Light)
{
pinMode(EXAMPLE_PIN_NUM_BK_LIGHT, OUTPUT);
if (Light > 0) {
digitalWrite(EXAMPLE_PIN_NUM_BK_LIGHT, HIGH);
} else {
digitalWrite(EXAMPLE_PIN_NUM_BK_LIGHT, LOW);
}
if (Light > 100) Light = 100;
uint32_t duty = Light * 10;
ledcWrite(EXAMPLE_PIN_NUM_BK_LIGHT, duty);
}

12
sound_picture_app/Display_ST7789.h
View File

@@ -6,12 +6,12 @@
#define SPIFreq 80000000
#define EXAMPLE_PIN_NUM_MISO -1
#define EXAMPLE_PIN_NUM_MOSI 39
#define EXAMPLE_PIN_NUM_SCLK 38
#define EXAMPLE_PIN_NUM_LCD_CS 21
#define EXAMPLE_PIN_NUM_LCD_DC 45
#define EXAMPLE_PIN_NUM_LCD_RST 40
#define EXAMPLE_PIN_NUM_BK_LIGHT 46
#define EXAMPLE_PIN_NUM_MOSI 45
#define EXAMPLE_PIN_NUM_SCLK 40
#define EXAMPLE_PIN_NUM_LCD_CS 42
#define EXAMPLE_PIN_NUM_LCD_DC 41
#define EXAMPLE_PIN_NUM_LCD_RST 39
#define EXAMPLE_PIN_NUM_BK_LIGHT 48
#define Frequency 1000 // PWM frequencyconst
#define Resolution 10

6
sound_picture_app/SD_Card.cpp
View File

@@ -18,15 +18,15 @@ int g_favoriteMemoryId = -1;
// ── SD Init ───────────────────────────────────────────────────────────────────
void SD_Init() {
if (!SD_MMC.setPins(SD_CLK_PIN, SD_CMD_PIN, SD_D0_PIN)) {
if (!SD_MMC.setPins(SD_CLK_PIN, SD_CMD_PIN, SD_D0_PIN, SD_D1_PIN, SD_D2_PIN, SD_D3_PIN)) {
printf("SD MMC: Pin change failed!\r\n");
return;
}
if (!SD_MMC.begin("/sdcard", true, true)) {
if (!SD_MMC.begin("/sdcard", false, true)) {
printf("SD card initialization failed!\r\n");
return;
}
printf("SD card OK (1-bit mode)\r\n");
printf("SD card OK (4-bit mode)\r\n");
uint8_t cardType = SD_MMC.cardType();
if (cardType == CARD_NONE) { printf("No SD card attached\r\n"); return; }

5
sound_picture_app/SD_Card.h
View File

@@ -4,10 +4,13 @@
#include "FS.h"
#include "SD_MMC.h"
// SD card MMC pins (1-bit mode to avoid GPIO 21 conflict with LCD_CS)
// SD card MMC pins (4-bit mode, fully compatible now LCD_CS is on GPIO 42)
#define SD_CLK_PIN 14
#define SD_CMD_PIN 15
#define SD_D0_PIN 16
#define SD_D1_PIN 18
#define SD_D2_PIN 17
#define SD_D3_PIN 21
#define MAX_MEMORIES 50
#define MAX_NAME_LEN 64