/*!
* \brief Writes a byte and reads the value
* \param val Value to write. This value will be shifted out
* \return The value shifted in
*/
static uint8_t SPI_WriteRead(uint8_t val) {
uint8_t ch;
while (SM1_GetCharsInTxBuf()!=0) {} /* wait until tx is empty */
while (SM1_SendChar(val)!=ERR_OK) {} /* send character */
while (SM1_GetCharsInTxBuf()!=0) {} /* wait until data has been sent */
while (SM1_GetCharsInRxBuf()==0) {} /* wait until we receive data */
while (SM1_RecvChar(&ch)!=ERR_OK) {} /* get data */
return ch;
}
uint8_t HardwareSPI::transfer(uint8_t val) {
uint8_t ch;
while(SM1_GetCharsInTxBuf()!=0) {} /* wait until tx is empty */
while(SM1_SendChar(val)!=ERR_OK) {} /* send character */
while(SM1_GetCharsInTxBuf()!=0) {} /* wait until data has been sent */
while(SM1_GetCharsInRxBuf()==0) {} /* wait until we receive data */
while(SM1_RecvChar(&ch)!=ERR_OK) {} /* get data */
return ch;
}
