/*! \brief Initialize the SPI in slave mode and enable the spi interrupt.
*/
static void spi_slave_init(volatile void *spi, uint8_t mode)
{
/* Enable Clock for SPI module */
sysclk_enable_module(POWER_RED_REG0, PRSPI_bm);
/* Configure SPI pins for slave */
/* Set MISO as output high, and set MOSI, SS , SCK as input */
gpio_configure_pin(SPI_SCK, IOPORT_DIR_INPUT);
gpio_configure_pin(SPI_MOSI, IOPORT_DIR_INPUT);
gpio_configure_pin(SPI_SS, IOPORT_DIR_INPUT);
gpio_configure_pin(SPI_MISO, IOPORT_INIT_HIGH | IOPORT_DIR_OUTPUT);
/* Set the clock mode */
spi_set_clock_mode(spi, mode);
/* Enable SPI as slave */
spi_enable_slave_mode(spi);
/* Set the interrupt call back */
spi_set_interrupt_callback(spi_interrupt_callback);
/* Enable SPI interrupt */
spi_enable_interrupt(spi);
}
static int spi_set_params(struct s3c2410_spi *device)
{
spi_set_def_prescale(device);
spi_set_master_mode(device);
spi_set_clock_mode(device);
spi_enable_sck(device);
sppin_set_keep(0x1); /* stay in master mode after tx */
sppin_set_resv1(0x1); /* according to spec this should be 1 */
dprintf("%s: done\n", __func__);
return 0;
}
