// Master talks to Cry Detect Board (CDB)
void spiMaster_Init(void) {
// Open the SPI driver.
DrvSPI_Open(SPI_MASTER_HANDLER, SPI_MASTER_OPEN_FLAGS, SPI_MASTER_DIVIDER);
// Select the slave.
DrvSPI_SlaveSelect(SPI_MASTER_HANDLER, TRUE, DRVSPI_IDEL_CLK_LOW);
DrvSPI_SelectSlave(SPI_MASTER_HANDLER, SPI_MASTER_DEVICE);
// Read/write data in 16 bit chunks.
DrvSPI_SetDataConfig(SPI_MASTER_HANDLER, 1, 16);
}
void init_SPI3(void)
{
DrvGPIO_Open(E_GPB, 9, E_IO_OUTPUT);
DrvGPIO_Open(E_GPB, 7, E_IO_OUTPUT);
DrvGPIO_Open(E_GPB, 10, E_IO_OUTPUT);
DrvGPIO_Open(E_GPD, 14, E_IO_OUTPUT);
DrvGPIO_ClrBit(E_GPD, 14);
DrvGPIO_InitFunction(E_FUNC_SPI3);
/* Configure SPI3 as a master, Type1 waveform, 8-bit transaction */
DrvSPI_Open(eDRVSPI_PORT3, eDRVSPI_MASTER, eDRVSPI_TYPE1, 8);
/* MSB first */
DrvSPI_SetEndian(eDRVSPI_PORT3, eDRVSPI_MSB_FIRST);
/* Disable the automatic slave select function of SS0. */
DrvSPI_DisableAutoSS(eDRVSPI_PORT3);
/* Set the active level of slave select. */
DrvSPI_SetSlaveSelectActiveLevel(eDRVSPI_PORT3, eDRVSPI_ACTIVE_LOW_FALLING);
/* SPI clock rate 20MHz */
DrvSPI_SetClockFreq(eDRVSPI_PORT3, 25000000, 0);
SPI_CS_SET;
}
void spiSlave_Init(void)
{
// Open the SPI driver.
DrvSPI_Open(SPI_SLAVE_HANDLER, SPI_SLAVE_OPEN_FLAGS, SPI_SLAVE_DIVIDER);
// Configure for slave mode.
DrvSPI_SPI1_SetSlaveMode(TRUE);
// Level trigger for slave mode.
DrvSPI_SPI1_LevelTriggerInSlave(TRUE);
// Set the zero status byte to shift out.
DrvSPI_SingleWriteData0(SPI_SLAVE_HANDLER, (UINT32) 0x00);
// Initiate the SPI transaction.
DrvSPI_SetGo(SPI_SLAVE_HANDLER);
// Enable interupt on SPI CS falling.
DrvGPIO_SetFallingInt(&SPI_SLAVE_GPIO, SPI_SLAVE_CS_PIN, TRUE);
sway_state = NO_STATE;
}