/**
* @brief Reads a block of data from the LIS302DL.
* @param pBuffer : pointer to the buffer that receives the data read from the LIS302DL.
* @param ReadAddr : LIS302DL's internal address to read from.
* @param NumByteToRead : number of bytes to read from the LIS302DL.
* @retval None
*/
void LIS302DL_Read(uint8_t* pBuffer, uint8_t ReadAddr, uint16_t NumByteToRead)
{
if(NumByteToRead > 0x01)
{
ReadAddr |= (uint8_t)(READWRITE_CMD | MULTIPLEBYTE_CMD);
}
else
{
ReadAddr |= (uint8_t)READWRITE_CMD;
}
/* Set chip select Low at the start of the transmission */
LIS302DL_CS_LOW();
/* Send the Address of the indexed register */
LIS302DL_SendByte(ReadAddr);
/* Receive the data that will be read from the device (MSB First) */
while(NumByteToRead > 0x00)
{
/* Send dummy byte (0x00) to generate the SPI clock to LIS302DL (Slave device) */
*pBuffer = LIS302DL_SendByte(DUMMY_BYTE);
NumByteToRead--;
pBuffer++;
}
/* Set chip select High at the end of the transmission */
LIS302DL_CS_HIGH();
}
/**
* @brief Writes one byte to the LIS302DL.
* @param pBuffer : pointer to the buffer containing the data to be written to the LIS302DL.
* @param WriteAddr : LIS302DL's internal address to write to.
* @param NumByteToWrite: Number of bytes to write.
* @retval None
*/
void LIS302DL_Write(uint8_t* pBuffer, uint8_t WriteAddr, uint16_t NumByteToWrite)
{
/* Configure the MS bit:
- When 0, the address will remain unchanged in multiple read/write commands.
- When 1, the address will be auto incremented in multiple read/write commands.
*/
if(NumByteToWrite > 0x01)
{
WriteAddr |= (uint8_t)MULTIPLEBYTE_CMD;
}
/* Set chip select Low at the start of the transmission */
LIS302DL_CS_LOW();
/* Send the Address of the indexed register */
LIS302DL_SendByte(WriteAddr);
/* Send the data that will be written into the device (MSB First) */
while(NumByteToWrite >= 0x01)
{
LIS302DL_SendByte(*pBuffer);
NumByteToWrite--;
pBuffer++;
}
/* Set chip select High at the end of the transmission */
LIS302DL_CS_HIGH();
}
void LIS302DL_Read(SPI_TypeDef* spi, uint8_t* pBuffer, uint8_t readAddr, uint16_t numByteToRead) {
// For reading multiple bytes we need to set bit 0 (RW) and 1 (MS)
if(numByteToRead > 1) {
readAddr |= (uint8_t)(LIS302DL_BIT0 | LIS302DL_BIT1);
} else {
readAddr |= (uint8_t)LIS302DL_BIT0;
}
// Set chip select Low at the start of the transmission
LIS302DL_CS_LOW();
// Send the address of the indexed register
_LIS302DL_SendByte(spi, readAddr);
// Receive the data that will be read from the device (MSB First)
// Send a dummy byte (0x00) to generate the SPI clock to LIS302DL (Slave device) and receive data.
while (numByteToRead > 0) {
*pBuffer = _LIS302DL_SendByte(spi, (uint8_t)LIS302DL_DUMMY_BYTE);
numByteToRead--;
pBuffer++;
}
// Set chip select High at the end of the transmission
LIS302DL_CS_HIGH();
}
void LIS302DL_Write(SPI_TypeDef* spi, uint8_t* pBuffer, uint8_t writeAddr, uint16_t numByteToWrite) {
// For writing multiple bytes we need to set bit 1 (MS)
if (numByteToWrite > 1) {
writeAddr |= (uint8_t)LIS302DL_BIT1;
}
// Set chip select Low at the start of the transmission
LIS302DL_CS_LOW();
LIS302DL_Read(spi);
// Send the Address of the indexed register
_LIS302DL_SendByte(spi, writeAddr);
// Send the data that will be written into the device (MSB First)
while (numByteToWrite >= 1) {
_LIS302DL_SendByte(spi, *pBuffer);
numByteToWrite--;
pBuffer++;
}
// Set chip select High at the end of the transmission
LIS302DL_CS_HIGH();
}