/**
* @brief Read register value.
* @param Reg
* @retval None
*/
uint16_t LCD_IO_ReadData(uint16_t Reg)
{
uint32_t readvalue = 0;
/* Change BaudRate Prescaler 8 for Read */
/* Mean SPI baudrate is set to 72/8 = 9 MHz */
heval_Spi.Instance->CR1 &= 0xFFC7;
heval_Spi.Instance->CR1 |= SPI_BAUDRATEPRESCALER_8;
/* Send Reg value to Read */
LCD_IO_WriteReg(Reg);
/* Reset LCD control line(/CS) and Send command */
LCD_CS_LOW();
/* Send Start Byte */
SPIx_Write(START_BYTE | LCD_READ_REG);
/* Read Upper Byte */
SPIx_Write(0xFF);
readvalue = SPIx_Read();
readvalue = readvalue << 8;
readvalue |= SPIx_Read();
/* Recover Baud Rate initial value */
heval_Spi.Instance->CR1 &= 0xFFC7;
heval_Spi.Instance->CR1 |= heval_Spi.Init.BaudRatePrescaler;
HAL_Delay(10);
/* Deselect : Chip Select high */
LCD_CS_HIGH();
return readvalue;
}
/**
* @brief Read register value.
* @param Reg
* @retval None
*/
uint16_t LCD_IO_ReadData(uint16_t Reg)
{
uint32_t readvalue = 0;
/* Send Reg value to Read */
LCD_IO_WriteReg(Reg);
/* Reset LCD control line(/CS) and Send command */
LCD_CS_LOW();
/* Send Start Byte */
SPIx_Write(START_BYTE | LCD_READ_REG);
/* Read Upper Byte */
SPIx_Write(0xFF);
readvalue = SPIx_Read();
readvalue = readvalue << 8;
readvalue |= SPIx_Read();
HAL_Delay(10);
/* Deselect : Chip Select high */
LCD_CS_HIGH();
return readvalue;
}
/**
* @brief Wait response from the SPI EEPROM
* @param None
* @retval HAL_StatusTypeDef HAL Status
*/
HAL_StatusTypeDef EEPROM_SPI_IO_WaitEepromStandbyState(void)
{
uint32_t timeout = 0xFFFF;
uint32_t eepromstatus;
/*!< Select the EEPROM: Chip Select low */
EEPROM_CS_LOW();
/*!< Send "Read Status Register" instruction */
SPIx_Write(EEPROM_CMD_RDSR);
/*!< Loop as long as the memory is busy with a write cycle */
do
{
/*!< Send a dummy byte to generate the clock needed by the EEPROM
and put the value of the status register in EEPROM Status variable */
eepromstatus = SPIx_Read();
timeout --;
}
while (((eepromstatus & EEPROM_WIP_FLAG) == SET) && timeout); /* Write in progress */
/*!< Deselect the EEPROM: Chip Select high */
EEPROM_CS_HIGH();
if ((eepromstatus & EEPROM_WIP_FLAG) != SET)
{
/* Right response got */
return HAL_OK;
}
else
{
/* After time out */
return HAL_TIMEOUT;
}
}
/**
* @brief Read data from SPI EEPROM driver
* @param MemAddress: Internal memory address
* @param pBuffer: Pointer to data buffer
* @param BufferSize: Amount of data to be read
* @retval HAL_StatusTypeDef HAL Status
*/
HAL_StatusTypeDef EEPROM_SPI_IO_ReadData(uint16_t MemAddress, uint8_t* pBuffer, uint32_t BufferSize)
{
/*!< Select the EEPROM: Chip Select low */
EEPROM_CS_LOW();
/*!< Send "Write to Memory " instruction */
SPIx_Write(EEPROM_CMD_READ);
/*!< Send MemAddress high nibble address byte to write to */
SPIx_Write((MemAddress & 0xFF0000) >> 16);
/*!< Send WriteAddr medium nibble address byte to write to */
SPIx_Write((MemAddress & 0xFF00) >> 8);
/*!< Send WriteAddr low nibble address byte to write to */
SPIx_Write(MemAddress & 0xFF);
while ((BufferSize)--) /*!< while there is data to be read */
{
/*!< Read a byte from the EEPROM */
*pBuffer = SPIx_Read();
/*!< Point to the next location where the byte read will be saved */
pBuffer++;
}
/*!< Deselect the EEPROM: Chip Select high */
EEPROM_CS_HIGH();
return HAL_OK;
}
/**
* @brief Reads a byte from the SD.
* @retval The received byte.
*/
uint8_t SD_IO_ReadByte(void)
{
uint8_t data = 0;
/* Get the received data */
data = SPIx_Read();
/* Return the shifted data */
return data;
}
/**
* @brief Reads a byte from the SD.
* @param None
* @retval The received byte.
*/
uint8_t SD_IO_ReadByte(void)
{
uint8_t data = 0;
/* Change BaudRate Prescaler 4 for Read */
/* Mean SPI baudrate is set to 72/4 = 18 MHz */
heval_Spi.Instance->CR1 &= 0xFFC7;
heval_Spi.Instance->CR1 |= SPI_BAUDRATEPRESCALER_4;
/* Get the received data */
data = SPIx_Read();
/* Return the shifted data */
return data;
}
/**
* @brief Reads register value.
* @param RegValue Address of the register to read
* @param ReadSize Number of bytes to read
* @retval Content of the register value
*/
uint32_t LCD_IO_ReadData(uint16_t RegValue, uint8_t ReadSize)
{
uint32_t readvalue = 0;
/* Select: Chip Select low */
LCD_CS_LOW();
/* Reset WRX to send command */
LCD_WRX_LOW();
SPIx_Write(RegValue);
readvalue = SPIx_Read(ReadSize);
/* Set WRX to send data */
LCD_WRX_HIGH();
/* Deselect: Chip Select high */
LCD_CS_HIGH();
return readvalue;
}
