void spi_preinit(spi_t *obj, PinName mosi, PinName miso, PinName clk, PinName cs)
{
SPIName spi_mosi = (SPIName) pinmap_peripheral(mosi, PinMap_SPI_MOSI);
SPIName spi_miso = (SPIName) pinmap_peripheral(miso, PinMap_SPI_MISO);
SPIName spi_clk = (SPIName) pinmap_peripheral(clk, PinMap_SPI_CLK);
SPIName spi_cs = (SPIName) pinmap_peripheral(cs, PinMap_SPI_CS);
SPIName spi_data = (SPIName) pinmap_merge(spi_mosi, spi_miso);
SPIName spi_ctrl = (SPIName) pinmap_merge(spi_clk, spi_cs);
obj->spi.spi = (USART_TypeDef *) pinmap_merge(spi_data, spi_ctrl);
MBED_ASSERT((int) obj->spi.spi != NC);
if (cs != NC) { /* Slave mode */
obj->spi.master = false;
} else {
obj->spi.master = true;
}
#if defined(_SILICON_LABS_32B_PLATFORM_1)
// On P1, we need to ensure all pins are on same location
uint32_t loc_mosi = pin_location(mosi, PinMap_SPI_MOSI);
uint32_t loc_miso = pin_location(miso, PinMap_SPI_MISO);
uint32_t loc_clk = pin_location(clk, PinMap_SPI_CLK);
uint32_t loc_cs = pin_location(cs, PinMap_SPI_CS);
uint32_t loc_data = pinmap_merge(loc_mosi, loc_miso);
uint32_t loc_ctrl = pinmap_merge(loc_clk, loc_cs);
obj->spi.location = pinmap_merge(loc_data, loc_ctrl);
MBED_ASSERT(obj->spi.location != NC);
#endif
obj->spi.dmaOptionsTX.dmaUsageState = DMA_USAGE_OPPORTUNISTIC;
}
void spi_preinit(spi_t *obj, PinName mosi, PinName miso, PinName clk, PinName cs)
{
SPIName spi_mosi = (SPIName) pinmap_peripheral(mosi, PinMap_SPI_MOSI);
SPIName spi_miso = (SPIName) pinmap_peripheral(miso, PinMap_SPI_MISO);
SPIName spi_clk = (SPIName) pinmap_peripheral(clk, PinMap_SPI_CLK);
SPIName spi_cs = (SPIName) pinmap_peripheral(cs, PinMap_SPI_CS);
SPIName spi_data = (SPIName) pinmap_merge(spi_mosi, spi_miso);
SPIName spi_ctrl = (SPIName) pinmap_merge(spi_clk, spi_cs);
obj->spi.spi = (USART_TypeDef *) pinmap_merge(spi_data, spi_ctrl);
MBED_ASSERT((int) obj->spi.spi != NC);
if (cs != NC) { /* Slave mode */
obj->spi.master = false;
} else {
obj->spi.master = true;
}
uint32_t loc_mosi = pin_location(mosi, PinMap_SPI_MOSI);
uint32_t loc_miso = pin_location(miso, PinMap_SPI_MISO);
uint32_t loc_clk = pin_location(clk, PinMap_SPI_CLK);
uint32_t loc_cs = pin_location(cs, PinMap_SPI_CS);
uint32_t loc_data = pinmap_merge(loc_mosi, loc_miso);
uint32_t loc_ctrl = pinmap_merge(loc_clk, loc_cs);
obj->spi.location = pinmap_merge(loc_data, loc_ctrl);
MBED_ASSERT(obj->spi.location != NC);
obj->spi.dmaOptionsTX.dmaUsageState = DMA_USAGE_OPPORTUNISTIC;
}
void i2c_preinit(i2c_t *obj, PinName sda, PinName scl)
{
I2CName i2c_sda = (I2CName) pinmap_peripheral(sda, PinMap_I2C_SDA);
I2CName i2c_scl = (I2CName) pinmap_peripheral(scl, PinMap_I2C_SCL);
obj->i2c.i2c = (I2C_TypeDef*) pinmap_merge(i2c_sda, i2c_scl);
MBED_ASSERT(((int) obj->i2c.i2c) != NC);
int loc_sda = pin_location(sda, PinMap_I2C_SDA);
int loc_scl = pin_location(scl, PinMap_I2C_SCL);
obj->i2c.loc = pinmap_merge(loc_sda, loc_scl);
MBED_ASSERT(obj->i2c.loc != NC);
obj->i2c.sda = sda;
obj->i2c.scl = scl;
}
void analogin_init(analogin_t *obj, PinName pin)
{
static uint8_t adc_initialized = 0;
/* Init structure */
obj->adc = (ADC_TypeDef *) pinmap_peripheral(pin, PinMap_ADC);
MBED_ASSERT((int) obj->adc != NC);
obj->channel = pin_location(pin, PinMap_ADC);
MBED_ASSERT((int) obj->channel != NC);
/* Only initialize the ADC once */
if (!adc_initialized) {
/* Turn on the clock */
CMU_ClockEnable(cmuClock_ADC0, true);
/* Init with default settings */
ADC_Init_TypeDef init = ADC_INIT_DEFAULT;
init.prescale = 4;
ADC_Init(obj->adc, &init);
/* Init for single conversion use */
ADC_InitSingle_TypeDef singleInit = ADC_INITSINGLE_DEFAULT;
/* Measure input channel with Vdd reference. */
singleInit.reference = adcRefVDD;
singleInit.resolution = adcRes12Bit;
singleInit.acqTime = adcAcqTime32;
ADC_InitSingle(obj->adc, &singleInit);
adc_initialized = 1;
}
}
void analogout_init(dac_t *obj, PinName pin)
{
/* init in-memory structure */
obj->dac = (DAC_TypeDef *) pinmap_peripheral(pin, PinMap_DAC);
MBED_ASSERT((int) obj->dac != NC);
obj->channel = pin_location(pin, PinMap_DAC);
MBED_ASSERT((int) obj->channel != NC);
pin_mode(pin, Disabled);
if (!dac_initialized) {
/* Initialize the DAC. Will disable both DAC channels, so should only be done once */
/* Use default settings */
CMU_ClockEnable(cmuClock_DAC0, true);
DAC_Init_TypeDef init = DAC_INIT_DEFAULT;
/* Calculate the DAC clock prescaler value that will result in a DAC clock
* close to 500kHz. Second parameter is zero. This uses the current HFPERCLK
* frequency instead of setting a new one. */
init.prescale = DAC_PrescaleCalc(500000, REFERENCE_FREQUENCY);
/* Set reference voltage to VDD */
init.reference = dacRefVDD;
DAC_Init(obj->dac, &init);
dac_initialized = 1;
}
/* Use default channel settings */
DAC_InitChannel_TypeDef initChannel = DAC_INITCHANNEL_DEFAULT;
initChannel.enable = true;
DAC_InitChannel(obj->dac, &initChannel, obj->channel);
}
void analogout_preinit(dac_t *obj, PinName pin)
{
obj->dac = (DAC_TypeDef *) pinmap_peripheral(pin, PinMap_DAC);
MBED_ASSERT((int) obj->dac != NC);
obj->channel = pin_location(pin, PinMap_DAC);
MBED_ASSERT((int) obj->channel != NC);
}
void spi_enable_pins(spi_t *obj, uint8_t enable, PinName mosi, PinName miso, PinName clk, PinName cs)
{
if (enable) {
if (obj->spi.master) { /* Master mode */
/* Either mosi or miso can be NC */
if (mosi != NC) {
pin_mode(mosi, PushPull);
}
if (miso != NC) {
pin_mode(miso, Input);
}
pin_mode(clk, PushPull);
/* Don't set cs pin, since we toggle it manually */
} else { /* Slave mode */
if (mosi != NC) {
pin_mode(mosi, Input);
}
if (miso != NC) {
pin_mode(miso, PushPull);
}
pin_mode(clk, Input);
pin_mode(cs, Input);
}
} else {
// TODO_LP return PinMode to the previous state
if (obj->spi.master) { /* Master mode */
/* Either mosi or miso can be NC */
if (mosi != NC) {
pin_mode(mosi, Disabled);
}
if (miso != NC) {
pin_mode(miso, Disabled);
}
pin_mode(clk, Disabled);
/* Don't set cs pin, since we toggle it manually */
} else { /* Slave mode */
if (mosi != NC) {
pin_mode(mosi, Disabled);
}
if (miso != NC) {
pin_mode(miso, Disabled);
}
pin_mode(clk, Disabled);
pin_mode(cs, Disabled);
}
}
/* Enabling pins and setting location */
#ifdef _USART_ROUTEPEN_RESETVALUE
uint32_t route = USART_ROUTEPEN_CLKPEN;
obj->spi.spi->ROUTELOC0 &= ~_USART_ROUTELOC0_CLKLOC_MASK;
obj->spi.spi->ROUTELOC0 |= pin_location(clk, PinMap_SPI_CLK)<<_USART_ROUTELOC0_CLKLOC_SHIFT;
if (mosi != NC) {
route |= USART_ROUTEPEN_TXPEN;
obj->spi.spi->ROUTELOC0 &= ~_USART_ROUTELOC0_TXLOC_MASK;
obj->spi.spi->ROUTELOC0 |= pin_location(mosi, PinMap_SPI_MOSI)<<_USART_ROUTELOC0_TXLOC_SHIFT;
}
if (miso != NC) {
route |= USART_ROUTEPEN_RXPEN;
obj->spi.spi->ROUTELOC0 &= ~_USART_ROUTELOC0_RXLOC_MASK;
obj->spi.spi->ROUTELOC0 |= pin_location(miso, PinMap_SPI_MOSI)<<_USART_ROUTELOC0_RXLOC_SHIFT;
}
if (!obj->spi.master) {
route |= USART_ROUTEPEN_CSPEN;
obj->spi.spi->ROUTELOC0 &= ~_USART_ROUTELOC0_CSLOC_MASK;
obj->spi.spi->ROUTELOC0 |= pin_location(cs, PinMap_SPI_MOSI)<<_USART_ROUTELOC0_CSLOC_SHIFT;
}
obj->spi.spi->ROUTEPEN = route;
}
