f746_mini_apl/ili9341.cpp

#include "ili9341.h"

#include "stm32f7xx_ll_spi.h"

ILI9341::ILI9341(PinName MOSI, PinName MISO, PinName SCK, PinName DC, PinName RST)
        : dispPort(MOSI, MISO, SCK), rst(RST), dc(DC) {
    //    dispPort = new SPI(MOSI, MISO, SCK);
    dispPort.frequency(27000000);
    dispPort.format(8, 3);
    SPIx = spi_get_peripheral_name(MOSI, MISO, SCK);

    rst = 1;

    osDelay(10);
    rst = 0;
    osDelay(10);
    rst = 1;
    osDelay(10);

    LCD_WR_REG(0x01); //software reset
    osDelay(50);
    LCD_WR_REG(0x28);
    // display off
    //---------------------------------------------------------
    // magic?
    LCD_WR_REG(0xcf);
    LCD_WR_Data(0x00);
    LCD_WR_Data(0x83);
    LCD_WR_Data(0x30);

    LCD_WR_REG(0xed);
    LCD_WR_Data(0x64);
    LCD_WR_Data(0x03);
    LCD_WR_Data(0x12);
    LCD_WR_Data(0x81);
    LCD_WR_REG(0xe8);
    LCD_WR_Data(0x85);
    LCD_WR_Data(0x01);
    LCD_WR_Data(0x79);
    LCD_WR_REG(0xcb);
    LCD_WR_Data(0x39);
    LCD_WR_Data(0x2c);
    LCD_WR_Data(0x00);
    LCD_WR_Data(0x34);
    LCD_WR_Data(0x02);
    LCD_WR_REG(0xf7);
    LCD_WR_Data(0x20);
    LCD_WR_REG(0xea);
    LCD_WR_Data(0x00);
    LCD_WR_Data(0x00);
    //------------power control------------------------------
    LCD_WR_REG(0xc0); //power control
    LCD_WR_Data(0x26);
    LCD_WR_REG(0xc1); //power control
    LCD_WR_Data(0x11);
    //--------------VCOM
    LCD_WR_REG(0xc5); //vcom control
    LCD_WR_Data(0x35); //35
    LCD_WR_Data(0x3e); //3E
    LCD_WR_REG(0xc7); //vcom control
    LCD_WR_Data(0xbe); // 0x94
    //------------memory access control------------------------
    LCD_WR_REG(0x36);
    // memory access control
    LCD_WR_Data(0xE8U); //Поворот экрана на 0 градусов
//    LCD_WR_Data(0x28U); //Поворот экрана на 180 градусов
    LCD_WR_REG(0x3a); // pixel format set
    LCD_WR_Data(0x55); //16bit /pixel

    //----------------- frame rate------------------------------
    LCD_WR_REG(0xb1);
    // frame rate
    LCD_WR_Data(0x00U);
    LCD_WR_Data(0x1BU); //70
    //----------------Gamma---------------------------------
    LCD_WR_REG(0xf2); // 3Gamma Function Disable
    LCD_WR_Data(0x08);
    LCD_WR_REG(0x26);
    LCD_WR_Data(0x01); // gamma set 4 gamma curve 01/02/04/08

    LCD_WR_REG(0xE0); //positive gamma correction
    LCD_WR_Data(0x1f);
    LCD_WR_Data(0x1a);
    LCD_WR_Data(0x18);
    LCD_WR_Data(0x0a);
    LCD_WR_Data(0x0f);
    LCD_WR_Data(0x06);
    LCD_WR_Data(0x45);
    LCD_WR_Data(0x87);
    LCD_WR_Data(0x32);
    LCD_WR_Data(0x0a);
    LCD_WR_Data(0x07);
    LCD_WR_Data(0x02);
    LCD_WR_Data(0x07);
    LCD_WR_Data(0x05);
    LCD_WR_Data(0x00);
    LCD_WR_REG(0xE1); //negamma correction
    LCD_WR_Data(0x00);
    LCD_WR_Data(0x25);
    LCD_WR_Data(0x27);
    LCD_WR_Data(0x05);
    LCD_WR_Data(0x10);
    LCD_WR_Data(0x09);
    LCD_WR_Data(0x3a);
    LCD_WR_Data(0x78);
    LCD_WR_Data(0x4d);
    LCD_WR_Data(0x05);
    LCD_WR_Data(0x18);
    LCD_WR_Data(0x0d);
    LCD_WR_Data(0x38);
    LCD_WR_Data(0x3a);
    LCD_WR_Data(0x1f);
    //--------------ddram ---------------------
    LCD_WR_REG(0x2a);
    // column set
    // size = 239
    LCD_WR_Data(0x00);
    LCD_WR_Data(0x00);
    LCD_WR_Data(0x00);
    LCD_WR_Data(0xEF);
    LCD_WR_REG(0x2b);
    // page address set
    // size = 319
    LCD_WR_Data(0x00);
    LCD_WR_Data(0x00);
    LCD_WR_Data(0x01);
    LCD_WR_Data(0x3F);
    // LCD_WR_REG(0x34);
    //LCD_WR_REG(0x35);
    // tearing effect off
    // tearing effect on
    //	 LCD_WR_REG(0xb4); // display inversion
    //	 LCD_WR_Data(0x00);
    LCD_WR_REG(0xb7); //entry mode set
    LCD_WR_Data(0x07);
    //-----------------display---------------------
    LCD_WR_REG(0xb6);
    // display function control
    LCD_WR_Data(0x0a);
    LCD_WR_Data(0x82);
    LCD_WR_Data(0x27);
    LCD_WR_Data(0x00);
    LCD_WR_REG(0x11); //sleep out
    osDelay(100);
    LCD_WR_REG(0x29); // display on
}

void ILI9341::LCD_WR_Data(uint8_t Data) {
    dc = 1;
    dispPort.write(Data);
}

void ILI9341::LCD_WR_REG(uint8_t Reg) {
    dc = 0;
    dispPort.write(Reg);
}

void
ILI9341::LCD_setaddress(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2) //set coordinate for print or other function
{
    LCD_WR_REG(0x2A);
    LCD_WR_Data(x1 >> 8);
    LCD_WR_Data(x1);
    LCD_WR_Data(x2 >> 8);
    LCD_WR_Data(x2);

    LCD_WR_REG(0x2B);
    LCD_WR_Data(y1 >> 8);
    LCD_WR_Data(y1);
    LCD_WR_Data(y2 >> 8);
    LCD_WR_Data(y2);

    LCD_WR_REG(0x2C); //memory write
}

void ILI9341::transmitData(const uint8_t *pixels, uint16_t x, uint16_t y, uint16_t w, uint16_t h) {
    uint32_t n_bytes = w * h;

    LCD_setaddress(x, y, x + w - 1U, y + h - 1U);
    dc = 1;
    dispPort.format(16, 3);
    while (n_bytes) {
        uint8_t lo = *pixels++;
        uint8_t hi = *pixels++;
        while (!LL_SPI_IsActiveFlag_TXE(SPI1)) {
        }
        LL_SPI_TransmitData16(reinterpret_cast<SPI_TypeDef *>(SPIx), hi << 8 | lo);

        n_bytes--;
    }
    dispPort.format(8, 3);
}