/**
* @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_Write(u8 REG, u8 *DATA, u8 count) {
GPIO_WriteBit(GPIOE, GPIO_Pin_3, RESET);
LIS302DL_SendByte(REG);
for (int i=0; i < count; i++) {
LIS302DL_SendByte(*DATA);
DATA++;
}
GPIO_WriteBit(GPIOE, GPIO_Pin_3, SET);
}
void LIS302DL_Read(u8 REG, u8 *DATA, u8 count) {
GPIO_WriteBit(GPIOE, GPIO_Pin_3, RESET);
REG |= 0x80;
if (count > 1) {
REG |= 0x40;
}
LIS302DL_SendByte(REG);
for (u8 i=0; i < count; i++) {
*DATA = LIS302DL_SendByte((u8)0x00);
DATA++;
}
GPIO_WriteBit(GPIOE, GPIO_Pin_3, SET);
}
