LCD Controller S1D13781 über SPI mit STM32F407-DISC1

uint32_t seReadReg16(uint32_t Index)

{

  uint32_t addr = Index |= 0x60800;  

// hier in dem Beispiel Index =0x02 zum Auslesen des Product Codes der 0x0050 zurückgeben soll (siehe Anhang)

  uint32_t value;

  Chip_Select(0);

  SET_ADDR(addr);

  value = GET_DATA();

  Chip_Select(1);

  return value;

}

void SET_ADDR(uint32_t addr)

{

  addr &= 0x00FFFFFF;

  addr |= 0xC0000000;

  uint8_t data[4];

  data[0] = (uint8_t)(addr >> 24);

  data[1] = (uint8_t)(addr >> 16);

  data[2] = (uint8_t)(addr >> 8);

  data[3] = (uint8_t)(addr);

  uint8_t dummy = 0;

  uint8_t received;

  HAL_SPI_TransmitReceive(&hspi2, data, &received, 4, HAL_MAX_DELAY);

  HAL_SPI_TransmitReceive(&hspi2, &dummy, &received, 1, HAL_MAX_DELAY);

}

uint16_t GET_DATA(void)

{

            uint32_t val;

      uint8_t received;

      uint8_t dummy = 0;

      HAL_SPI_TransmitReceive(&hspi2, &dummy, &received, 1, HAL_MAX_DELAY);

      val = (uint32_t) received;

      HAL_SPI_TransmitReceive(&hspi2, &dummy, &received, 1, HAL_MAX_DELAY);

      val |= (uint32_t) received << 8;

      return (uint16_t)val;

}