void sdcard_init(void) {
// invalidate the sd_handle
sd_handle.Instance = NULL;
// configure SD GPIO
// we do this here an not in HAL_SD_MspInit because it apparently
// makes it more robust to have the pins always pulled high
// Note: the mp_hal_pin_config function will configure the GPIO in
// fast mode which can do up to 50MHz. This should be plenty for SDIO
// which clocks up to 25MHz maximum.
#if defined(MICROPY_HW_SDMMC2_CK)
// Use SDMMC2 peripheral with pins provided by the board's config
mp_hal_pin_config_alt_static(MICROPY_HW_SDMMC2_CK, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, STATIC_AF_SDMMC2_CK);
mp_hal_pin_config_alt_static(MICROPY_HW_SDMMC2_CMD, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, STATIC_AF_SDMMC2_CMD);
mp_hal_pin_config_alt_static(MICROPY_HW_SDMMC2_D0, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, STATIC_AF_SDMMC2_D0);
mp_hal_pin_config_alt_static(MICROPY_HW_SDMMC2_D1, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, STATIC_AF_SDMMC2_D1);
mp_hal_pin_config_alt_static(MICROPY_HW_SDMMC2_D2, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, STATIC_AF_SDMMC2_D2);
mp_hal_pin_config_alt_static(MICROPY_HW_SDMMC2_D3, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, STATIC_AF_SDMMC2_D3);
#else
// Default SDIO/SDMMC1 config
mp_hal_pin_config_alt_static(MICROPY_HW_SDMMC_D0, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, STATIC_AF_SDMMC_D0);
mp_hal_pin_config_alt_static(MICROPY_HW_SDMMC_D1, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, STATIC_AF_SDMMC_D1);
mp_hal_pin_config_alt_static(MICROPY_HW_SDMMC_D2, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, STATIC_AF_SDMMC_D2);
mp_hal_pin_config_alt_static(MICROPY_HW_SDMMC_D3, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, STATIC_AF_SDMMC_D3);
mp_hal_pin_config_alt_static(MICROPY_HW_SDMMC_CK, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, STATIC_AF_SDMMC_CK);
mp_hal_pin_config_alt_static(MICROPY_HW_SDMMC_CMD, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, STATIC_AF_SDMMC_CMD);
#endif
// configure the SD card detect pin
// we do this here so we can detect if the SD card is inserted before powering it on
mp_hal_pin_config(MICROPY_HW_SDCARD_DETECT_PIN, MP_HAL_PIN_MODE_INPUT, MICROPY_HW_SDCARD_DETECT_PULL, 0);
}
STATIC void servo_init_channel(pyb_servo_obj_t *s) {
static const uint8_t channel_table[4] =
{TIM_CHANNEL_1, TIM_CHANNEL_2, TIM_CHANNEL_3, TIM_CHANNEL_4};
uint32_t channel = channel_table[s->pin->pin];
// GPIO configuration
mp_hal_pin_config(s->pin, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_NONE, GPIO_AF2_TIM5);
// PWM mode configuration
TIM_OC_InitTypeDef oc_init;
oc_init.OCMode = TIM_OCMODE_PWM1;
oc_init.Pulse = s->pulse_cur; // units of 10us
oc_init.OCPolarity = TIM_OCPOLARITY_HIGH;
oc_init.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_PWM_ConfigChannel(&TIM5_Handle, &oc_init, channel);
// start PWM
HAL_TIM_PWM_Start(&TIM5_Handle, channel);
}
STATIC void adc_init_single(pyb_obj_adc_t *adc_obj) {
if (!is_adcx_channel(adc_obj->channel)) {
return;
}
if (ADC_FIRST_GPIO_CHANNEL <= adc_obj->channel && adc_obj->channel <= ADC_LAST_GPIO_CHANNEL) {
// Channels 0-16 correspond to real pins. Configure the GPIO pin in ADC mode.
const pin_obj_t *pin = pin_adc_table[adc_obj->channel];
mp_hal_pin_config(pin, MP_HAL_PIN_MODE_ADC, MP_HAL_PIN_PULL_NONE, 0);
}
adcx_init_periph(&adc_obj->handle, ADC_RESOLUTION_12B);
#if defined(STM32L4) && defined(ADC_DUALMODE_REGSIMULT_INJECSIMULT)
ADC_MultiModeTypeDef multimode;
multimode.Mode = ADC_MODE_INDEPENDENT;
if (HAL_ADCEx_MultiModeConfigChannel(&adc_obj->handle, &multimode) != HAL_OK)
{
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Can not set multimode on ADC1 channel: %d", adc_obj->channel));
}
#endif
}
// this function inits the switch GPIO so that it can be used
void switch_init0(void) {
mp_hal_pin_config(MICROPY_HW_USRSW_PIN, MP_HAL_PIN_MODE_INPUT, MICROPY_HW_USRSW_PULL, 0);
}
