void sd_mmc_spi_select_device(uint8_t slot, uint32_t clock, uint8_t bus_width,
bool high_speed)
{
UNUSED(bus_width);
UNUSED(high_speed);
sd_mmc_spi_err = SD_MMC_SPI_NO_ERR;
#ifdef SD_MMC_SPI_MAX_CLOCK
if (clock > SD_MMC_SPI_MAX_CLOCK) {
clock = SD_MMC_SPI_MAX_CLOCK;
}
#endif
while (STATUS_ERR_INVALID_ARG == spi_set_baudrate(&sd_mmc_master, clock)) {
clock -= clock / 8;
}
spi_select_slave(&sd_mmc_master, &sd_mmc_spi_devices[slot], true);
}
/*!
* This function configures the hardware SPI for the currrent client.
* Lock must be taken
*
* @param mod the module number
* @param client_config client hardware configuration.
* @return This function returns 0 if successful, -EPERM otherwise.
*/
static int spi_hard_config(module_nb_t mod, spi_config * client_config)
{
int error = 0;
error = spi_set_baudrate(mod, client_config->bit_rate);
if (error < 0) {
return error;
}
spi_set_transfer_length(mod, client_config->bit_count);
error = spi_select_ss(mod, client_config->ss_asserted);
if (error < 0) {
return error;
}
if (client_config->master_mode == true) {
spi_set_mode(mod, SPI_MASTER);
} else {
spi_set_mode(mod, SPI_SLAVE);
}
if (client_config->active_high_ss_polarity == true) {
spi_set_ss_polarity(mod, SPI_SS_ACTIVE_HIGH);
} else {
spi_set_ss_polarity(mod, SPI_SS_ACTIVE_LOW);
}
if (client_config->ss_low_between_bursts == true) {
spi_set_ss_waveform(mod, SPI_LOW_BTN_BURST);
} else {
spi_set_ss_waveform(mod, SPI_PULSE_BTN_BURST);
}
if (client_config->phase == true) {
spi_set_phase(mod, SPI_PHASE_1);
} else {
spi_set_phase(mod, SPI_PHASE_0);
}
if (client_config->active_high_polarity == true) {
spi_set_polarity(mod, SPI_POLARITY_ACTIVE_HIGH);
} else {
spi_set_polarity(mod, SPI_POLARITY_ACTIVE_LOW);
}
return 0;
}
void cph_deca_spi_set_baud(uint32_t baud) {
spi_set_baudrate(&spi_master_instance, baud);
}
/**
* Start SCI controller in UART mode
* @param port number
* @param baud
* @param polarity
* @param phase
* @param master or slave
* @return none
*/
void
spi_init(uint8 port, uint16 baud, uint8 polarity, uint8 phase, uint8 master_slave_selector)
{
/*
* Initialize all three UARTs for serial communications
*/
DEMO_SELECTOR_OFF;/*startup line for reference design*/
switch(port)
{
case SPI1_PORT:
//Enable pins:
/*SPI function*/
SPI1_MOSI_MISO_CLK_INIT;
/*starting SPI clock*/
SCGC2_SPI1 = 1;
/*master-slave SPI*/
if(master_slave_selector)
{
SPI1C1_MSTR = 1;//master
SPI1_SS_GPIO_INIT;
}
else
{
SPI1C1_MSTR = 0;//slave
SPI1_SS_INIT;
}
/*baudrate and SPI baudrate*/
spi_set_baudrate(SPI1_PORT,baud);
/*polarity*/
if(polarity)
{
SPI1C1_CPOL = 1;
}
else
{
SPI1C1_CPOL = 0;
}
/*phase*/
if(phase)
{
SPI1C1_CPHA = 1;
}
else
{
SPI1C1_CPHA = 0;
}
break;
case SPI2_PORT:
//Enable pins:
/*SPI function*/
SPI2_MOSI_MISO_CLK_INIT;
/*starting SPI clock*/
SCGC2_SPI2 = 1;
/*master-slave SPI*/
if(master_slave_selector)
{
SPI2C1_MSTR = 1;//master
SPI2_SS_GPIO_INIT;
}
else
{
SPI2C1_MSTR = 0;//slave
SPI2_SS_INIT;
}
/*baudrate & start SPI controller*/
spi_set_baudrate(SPI2_PORT,baud);
/*polarity*/
if(polarity)
{
SPI2C1_CPOL = 1;
}
else
{
SPI2C1_CPOL = 0;
}
/*phase*/
if(phase)
{
SPI2C1_CPHA = 1;
}
else
{
SPI2C1_CPHA = 0;
}
break;
}
}