inline uint16_t enc28_SPISend(uint16_t ui16_rw) {
uint32_t ui32_rx_val;
MAP_SSIDataPut(ui32_SSIx, ui16_rw);
while(MAP_SSIBusy(SSI0_BASE));
MAP_SSIDataGet(ui32_SSIx, &ui32_rx_val);
return (uint16_t)ui32_rx_val;
}
/*
* @brief Deselects all select/latch pins
* Waits till all transfers are finished
* @return if their is a error return FALSE else ture
*/
boolean SPIDeselectISR(void) {
// wait until the last transfer is finished
volatile uint16 i = 0;
while (MAP_SSIBusy(SSI0_BASE)) {
i++;
if (i > SPI_MAX_XFER_IRQ_DELAY) {
SPIBusError_SPIDeselectISR = TRUE;
return FALSE;
}
}
i = i + 1;
#if (defined(RONE_V12) || defined(RONE_V9))
//set output enable low, which pulls all spi select lines high
MAP_GPIOPinWrite(SPI_ENABLE_PORT, SPI_ENABLE_PIN, 0);
MAP_GPIOPinWrite(SPI_SELECT_PORT, SPI_SELECT_PINS, NULL_SELECT_PINS);
#endif
return TRUE;
}
/*
* @brief Cancels all selections. Then immediately sends a byte of 0xFF.
*
* Makes all SPI devices inactive. Then immediately sends a byte of 0xFF.
* @returns void
*/
void SPIDeselectSynchronous(void) {
// do the actual deselect
SPIDeselectISR();
//Send a 0xFF byte
//Load up the data and send it
uint32 rcvdat;
MAP_SSIDataPut(SSI0_BASE, 0xFF); /* Write the data to the tx fifo */
MAP_SSIDataGet(SSI0_BASE, &rcvdat); /* flush data read during the write */
// wait until the last transfer is finished
volatile uint16 i = 0;
while (MAP_SSIBusy(SSI0_BASE)) {
i++;
if (i > SPI_MAX_XFER_IRQ_DELAY) {
return;
}
}
}
