/**
* gpio init in
*
* Initializes the specified pin as an input
*
* @param pin Pin number to set as input
* @param pull pull type
*
* @return int 0: no error; -1 otherwise.
*/
int
hal_gpio_init_in(int pin, hal_gpio_pull_t pull)
{
int rc;
GPIO_InitTypeDef init_cfg;
init_cfg.Mode = GPIO_MODE_INPUT;
init_cfg.Pull = pull;
rc = hal_gpio_init_stm(pin, &init_cfg);
return rc;
}
/**
* gpio init af
*
* Configure the specified pin for AF.
*/
int
hal_gpio_init_af(int pin, uint8_t af_type, enum hal_gpio_pull pull, uint8_t od)
{
GPIO_InitTypeDef cfg;
cfg.Mode = od ? GPIO_MODE_AF_OD : GPIO_MODE_AF_PP;
cfg.Speed = GPIO_SPEED_FREQ_HIGH;
cfg.Pull = hal_gpio_pull_to_stm_pull(pull);
cfg.Alternate = af_type;
return hal_gpio_init_stm(pin, &cfg);
}
/**
* Configure an ADC channel on the STM32F4 ADC.
*
* @param dev The ADC device to configure
* @param cnum The channel on the ADC device to configure
* @param cfgdata An opaque pointer to channel config, expected to be
* a ADC_ChannelConfTypeDef
*
* @return 0 on success, non-zero on failure.
*/
static int
stm32f4_adc_configure_channel(struct adc_dev *dev, uint8_t cnum,
void *cfgdata)
{
int rc;
ADC_HandleTypeDef *hadc;
struct stm32f4_adc_dev_cfg *cfg;
struct adc_chan_config *chan_cfg;
GPIO_InitTypeDef gpio_td;
rc = OS_EINVAL;
if (dev == NULL && !IS_ADC_CHANNEL(cnum)) {
goto err;
}
cfg = (struct stm32f4_adc_dev_cfg *)dev->ad_dev.od_init_arg;
hadc = cfg->sac_adc_handle;
chan_cfg = &((struct adc_chan_config *)cfg->sac_chans)[cnum];
cfgdata = (ADC_ChannelConfTypeDef *)cfgdata;
if ((HAL_ADC_ConfigChannel(hadc, cfgdata)) != HAL_OK) {
goto err;
}
dev->ad_chans[cnum].c_res = chan_cfg->c_res;
dev->ad_chans[cnum].c_refmv = chan_cfg->c_refmv;
dev->ad_chans[cnum].c_configured = 1;
dev->ad_chans[cnum].c_cnum = cnum;
if (stm32f4_resolve_adc_gpio(hadc, cnum, &gpio_td)) {
goto err;
}
hal_gpio_init_stm(gpio_td.Pin, &gpio_td);
return (OS_OK);
err:
return (rc);
}
int
hal_spi_config(int spi_num, struct hal_spi_settings *settings)
{
struct stm32_hal_spi *spi;
struct stm32_hal_spi_cfg *cfg;
SPI_InitTypeDef *init;
GPIO_InitTypeDef gpio;
uint32_t gpio_speed;
IRQn_Type irq;
uint32_t prescaler;
int rc;
int sr;
__HAL_DISABLE_INTERRUPTS(sr);
STM32_HAL_SPI_RESOLVE(spi_num, spi);
init = &spi->handle.Init;
cfg = spi->cfg;
if (!spi->slave) {
spi->handle.Init.NSS = SPI_NSS_HARD_OUTPUT;
spi->handle.Init.Mode = SPI_MODE_MASTER;
} else {
spi->handle.Init.NSS = SPI_NSS_SOFT;
spi->handle.Init.Mode = SPI_MODE_SLAVE;
}
gpio.Mode = GPIO_MODE_AF_PP;
gpio.Pull = GPIO_NOPULL;
/* TODO: also VERY_HIGH for STM32L1x */
if (settings->baudrate <= 2000) {
gpio_speed = GPIO_SPEED_FREQ_LOW;
} else if (settings->baudrate <= 12500) {
gpio_speed = GPIO_SPEED_FREQ_MEDIUM;
} else {
gpio_speed = GPIO_SPEED_FREQ_HIGH;
}
/* Enable the clocks for this SPI */
switch (spi_num) {
#if SPI_0_ENABLED
case 0:
__HAL_RCC_SPI1_CLK_ENABLE();
#if !defined(STM32F1)
gpio.Alternate = GPIO_AF5_SPI1;
#endif
spi->handle.Instance = SPI1;
break;
#endif
#if SPI_1_ENABLED
case 1:
__HAL_RCC_SPI2_CLK_ENABLE();
#if !defined(STM32F1)
gpio.Alternate = GPIO_AF5_SPI2;
#endif
spi->handle.Instance = SPI2;
break;
#endif
#if SPI_2_ENABLED
case 2:
__HAL_RCC_SPI3_CLK_ENABLE();
#if !defined(STM32F1)
gpio.Alternate = GPIO_AF6_SPI3;
#endif
spi->handle.Instance = SPI3;
break;
#endif
#if SPI_3_ENABLED
case 3:
__HAL_RCC_SPI4_CLK_ENABLE();
#if !defined(STM32F1)
gpio.Alternate = GPIO_AF5_SPI4;
#endif
spi->handle.Instance = SPI4;
break;
#endif
#if SPI_4_ENABLED
case 4:
__HAL_RCC_SPI5_CLK_ENABLE();
#if !defined(STM32F1)
gpio.Alternate = GPIO_AF5_SPI5;
#endif
spi->handle.Instance = SPI5;
break;
#endif
#if SPI_5_ENABLED
case 5:
__HAL_RCC_SPI6_CLK_ENABLE();
#if !defined(STM32F1)
gpio.Alternate = GPIO_AF5_SPI6;
#endif
spi->handle.Instance = SPI6;
break;
#endif
default:
assert(0);
rc = -1;
goto err;
}
if (!spi->slave) {
if (settings->data_mode == HAL_SPI_MODE2 ||
settings->data_mode == HAL_SPI_MODE3) {
gpio.Pull = GPIO_PULLUP;
} else {
gpio.Pull = GPIO_PULLDOWN;
}
}
/* NOTE: Errata ES0125: STM32L100x6/8/B, STM32L151x6/8/B and
* STM32L152x6/8/B ultra-low-power device limitations.
*
* 2.6.6 - Corrupted last bit of data and or CRC, received in Master
* mode with delayed SCK feedback
*
* This driver is always using very high speed for SCK on STM32L1x
*/
#if defined(STM32L152xC)
if (!spi->slave) {
gpio.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
} else {
gpio.Speed = gpio_speed;
}
#else
gpio.Speed = gpio_speed;
#endif
rc = hal_gpio_init_stm(cfg->sck_pin, &gpio);
if (rc != 0) {
goto err;
}
#if defined(STM32L152xC)
if (!spi->slave) {
gpio.Speed = gpio_speed;
}
#endif
if (!spi->slave) {
gpio.Pull = GPIO_NOPULL;
} else {
gpio.Mode = GPIO_MODE_AF_OD;
}
rc = hal_gpio_init_stm(cfg->mosi_pin, &gpio);
if (rc != 0) {
goto err;
}
if (!spi->slave) {
gpio.Mode = GPIO_MODE_AF_OD;
} else {
gpio.Mode = GPIO_MODE_AF_PP;
}
rc = hal_gpio_init_stm(cfg->miso_pin, &gpio);
if (rc != 0) {
goto err;
}
switch (settings->data_mode) {
case HAL_SPI_MODE0:
init->CLKPolarity = SPI_POLARITY_LOW;
init->CLKPhase = SPI_PHASE_1EDGE;
break;
case HAL_SPI_MODE1:
init->CLKPolarity = SPI_POLARITY_LOW;
init->CLKPhase = SPI_PHASE_2EDGE;
break;
case HAL_SPI_MODE2:
init->CLKPolarity = SPI_POLARITY_HIGH;
init->CLKPhase = SPI_PHASE_1EDGE;
break;
case HAL_SPI_MODE3:
init->CLKPolarity = SPI_POLARITY_HIGH;
init->CLKPhase = SPI_PHASE_2EDGE;
break;
default:
rc = -1;
goto err;
}
switch (settings->data_order) {
case HAL_SPI_MSB_FIRST:
init->FirstBit = SPI_FIRSTBIT_MSB;
break;
case HAL_SPI_LSB_FIRST:
init->FirstBit = SPI_FIRSTBIT_LSB;
break;
default:
rc = -1;
goto err;
}
switch (settings->word_size) {
case HAL_SPI_WORD_SIZE_8BIT:
init->DataSize = SPI_DATASIZE_8BIT;
break;
case HAL_SPI_WORD_SIZE_9BIT:
init->DataSize = SPI_DATASIZE_16BIT;
break;
default:
rc = -1;
goto err;
}
rc = stm32_spi_resolve_prescaler(spi_num, settings->baudrate * 1000, &prescaler);
if (rc != 0) {
goto err;
}
init->BaudRatePrescaler = prescaler;
/* Add default values */
init->Direction = SPI_DIRECTION_2LINES;
init->TIMode = SPI_TIMODE_DISABLE;
init->CRCCalculation = SPI_CRCCALCULATION_DISABLE;
init->CRCPolynomial = 1;
#ifdef SPI_NSS_PULSE_DISABLE
init->NSSPMode = SPI_NSS_PULSE_DISABLE;
#endif
irq = stm32_resolve_spi_irq(&spi->handle);
NVIC_SetPriority(irq, cfg->irq_prio);
NVIC_SetVector(irq, stm32_resolve_spi_irq_handler(&spi->handle));
NVIC_EnableIRQ(irq);
/* Init, Enable */
rc = HAL_SPI_Init(&spi->handle);
if (rc != 0) {
goto err;
}
if (spi->slave) {
hal_spi_slave_set_def_tx_val(spi_num, 0);
rc = hal_gpio_irq_init(cfg->ss_pin, spi_ss_isr, spi, HAL_GPIO_TRIG_BOTH,
HAL_GPIO_PULL_UP);
spi_ss_isr(spi);
}
__HAL_ENABLE_INTERRUPTS(sr);
return (0);
err:
__HAL_ENABLE_INTERRUPTS(sr);
return (rc);
}
/**
* gpio irq init
*
* Initialize an external interrupt on a gpio pin
*
* @param pin Pin number to enable gpio.
* @param handler Interrupt handler
* @param arg Argument to pass to interrupt handler
* @param trig Trigger mode of interrupt
* @param pull Push/pull mode of input.
*
* @return int
*/
int
hal_gpio_irq_init(int pin, hal_gpio_irq_handler_t handler, void *arg,
hal_gpio_irq_trig_t trig, hal_gpio_pull_t pull)
{
int rc;
int irqn;
int index;
uint32_t pin_mask;
uint32_t mode;
GPIO_InitTypeDef cfg;
/* Configure the gpio for an external interrupt */
rc = 0;
switch (trig) {
case HAL_GPIO_TRIG_NONE:
rc = -1;
break;
case HAL_GPIO_TRIG_RISING:
mode = GPIO_MODE_IT_RISING;
break;
case HAL_GPIO_TRIG_FALLING:
mode = GPIO_MODE_IT_FALLING;
break;
case HAL_GPIO_TRIG_BOTH:
mode = GPIO_MODE_IT_RISING_FALLING;
break;
case HAL_GPIO_TRIG_LOW:
rc = -1;
break;
case HAL_GPIO_TRIG_HIGH:
rc = -1;
break;
default:
rc = -1;
break;
}
/* Check to make sure no error has occurred */
if (!rc) {
/* Disable interrupt and clear any pending */
hal_gpio_irq_disable(pin);
pin_mask = HAL_GPIO_PIN(pin);
__HAL_GPIO_EXTI_CLEAR_FLAG(pin_mask);
/* Set the gpio irq handler */
index = HAL_GPIO_PIN_NUM(pin);
hal_gpio_irq[index].isr = handler;
hal_gpio_irq[index].arg = arg;
hal_gpio_irq[index].invoked = 0;
/* Configure the GPIO */
cfg.Mode = mode;
cfg.Pull = pull;
rc = hal_gpio_init_stm(pin, &cfg);
if (!rc) {
/* Enable interrupt vector in NVIC */
irqn = hal_gpio_pin_to_irq(pin);
hal_gpio_set_nvic(irqn);
}
}
return rc;
}
