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;

    ThisThread::sleep_for(10ms);
//    (void)osDelay(10);
    rst = 0;
    ThisThread::sleep_for(10ms);
//    osDelay(10);
    rst = 1;
    ThisThread::sleep_for(10ms);
//    osDelay(10);

    LCD_WR_REG(0x01U); //software reset
    ThisThread::sleep_for(50ms);
//    osDelay(50);
    LCD_WR_REG(0x28U);
    // display off
    //---------------------------------------------------------
    // magic?
    LCD_WR_REG(0xcfU);
    LCD_WR_Data(0x00U);
    LCD_WR_Data(0x83U);
    LCD_WR_Data(0x30U);

    LCD_WR_REG(0xedU);
    LCD_WR_Data(0x64U);
    LCD_WR_Data(0x03U);
    LCD_WR_Data(0x12U);
    LCD_WR_Data(0x81U);
    LCD_WR_REG(0xe8U);
    LCD_WR_Data(0x85U);
    LCD_WR_Data(0x01U);
    LCD_WR_Data(0x79U);
    LCD_WR_REG(0xcbU);
    LCD_WR_Data(0x39U);
    LCD_WR_Data(0x2cU);
    LCD_WR_Data(0x00U);
    LCD_WR_Data(0x34U);
    LCD_WR_Data(0x02U);
    LCD_WR_REG(0xf7U);
    LCD_WR_Data(0x20U);
    LCD_WR_REG(0xeaU);
    LCD_WR_Data(0x00U);
    LCD_WR_Data(0x00U);
    //------------power control------------------------------
    LCD_WR_REG(0xc0U); //power control
    LCD_WR_Data(0x26U);
    LCD_WR_REG(0xc1U); //power control
    LCD_WR_Data(0x11U);
    //--------------VCOM
    LCD_WR_REG(0xc5U); //vcom control
    LCD_WR_Data(0x35U); //35
    LCD_WR_Data(0x3eU); //3E
    LCD_WR_REG(0xc7U); //vcom control
    LCD_WR_Data(0xbeU); // 0x94
    //------------memory access control------------------------
    LCD_WR_REG(0x36U);
    // memory access control
    LCD_WR_Data(0xE8U); //Поворот экрана на 0 градусов
//    LCD_WR_Data(0x28U); //Поворот экрана на 180 градусов
    LCD_WR_REG(0x3aU); // pixel format set
    LCD_WR_Data(0x55U); //16bit /pixel

    //----------------- frame rate------------------------------
    LCD_WR_REG(0xb1U);
    // frame rate
    LCD_WR_Data(0x00U);
    LCD_WR_Data(0x1BU); //70
    //----------------Gamma---------------------------------
    LCD_WR_REG(0xf2U); // 3Gamma Function Disable
    LCD_WR_Data(0x08U);
    LCD_WR_REG(0x26U);
    LCD_WR_Data(0x01U); // gamma set 4 gamma curve 01/02/04/08

    LCD_WR_REG(0xE0U); //positive gamma correction
    LCD_WR_Data(0x1fU);
    LCD_WR_Data(0x1aU);
    LCD_WR_Data(0x18U);
    LCD_WR_Data(0x0aU);
    LCD_WR_Data(0x0fU);
    LCD_WR_Data(0x06U);
    LCD_WR_Data(0x45U);
    LCD_WR_Data(0x87U);
    LCD_WR_Data(0x32U);
    LCD_WR_Data(0x0aU);
    LCD_WR_Data(0x07U);
    LCD_WR_Data(0x02U);
    LCD_WR_Data(0x07U);
    LCD_WR_Data(0x05U);
    LCD_WR_Data(0x00U);
    LCD_WR_REG(0xE1U); //negamma correction
    LCD_WR_Data(0x00U);
    LCD_WR_Data(0x25U);
    LCD_WR_Data(0x27U);
    LCD_WR_Data(0x05U);
    LCD_WR_Data(0x10U);
    LCD_WR_Data(0x09U);
    LCD_WR_Data(0x3aU);
    LCD_WR_Data(0x78U);
    LCD_WR_Data(0x4dU);
    LCD_WR_Data(0x05U);
    LCD_WR_Data(0x18U);
    LCD_WR_Data(0x0dU);
    LCD_WR_Data(0x38U);
    LCD_WR_Data(0x3aU);
    LCD_WR_Data(0x1fU);
    //--------------ddram ---------------------
    LCD_WR_REG(0x2aU);
    // column set
    // size = 239
    LCD_WR_Data(0x00U);
    LCD_WR_Data(0x00U);
    LCD_WR_Data(0x00U);
    LCD_WR_Data(0xEFU);
    LCD_WR_REG(0x2bU);
    // page address set
    // size = 319
    LCD_WR_Data(0x00U);
    LCD_WR_Data(0x00U);
    LCD_WR_Data(0x01U);
    LCD_WR_Data(0x3FU);
    // 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(0xb7U); //entry mode set
    LCD_WR_Data(0x07U);
    //-----------------display---------------------
    LCD_WR_REG(0xb6U);
    // display function control
    LCD_WR_Data(0x0aU);
    LCD_WR_Data(0x82U);
    LCD_WR_Data(0x27U);
    LCD_WR_Data(0x00U);
    LCD_WR_REG(0x11U); //sleep out
    ThisThread::sleep_for(100ms);
    LCD_WR_REG(0x29U); // display on
}

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

void ILI9341::LCD_WR_REG(uint8_t Reg) {
    dc = 0;
    (void)dispPort.write(static_cast<int>(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(0x2AU);
    LCD_WR_Data(x1 >> 8U);
    LCD_WR_Data(static_cast<uint8_t>(x1));
    LCD_WR_Data(x2 >> 8U);
    LCD_WR_Data(static_cast<uint8_t>(x2));

    LCD_WR_REG(0x2BU);
    LCD_WR_Data(y1 >> 8U);
    LCD_WR_Data(static_cast<uint8_t>(y1));
    LCD_WR_Data(y2 >> 8U);
    LCD_WR_Data(static_cast<uint8_t>(y2));

    LCD_WR_REG(0x2CU); //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);
}