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circuitpython/ports/stm32/pin_defs_stm32.c

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947 B

#include "py/obj.h"
#include "pin.h"
// Returns the pin mode. This value returned by this macro should be one of:
// GPIO_MODE_INPUT, GPIO_MODE_OUTPUT_PP, GPIO_MODE_OUTPUT_OD,
// GPIO_MODE_AF_PP, GPIO_MODE_AF_OD, or GPIO_MODE_ANALOG.
uint32_t pin_get_mode(const pin_obj_t *pin) {
GPIO_TypeDef *gpio = pin->gpio;
uint32_t mode = (gpio->MODER >> (pin->pin * 2)) & 3;
if (mode != GPIO_MODE_ANALOG) {
if (gpio->OTYPER & pin->pin_mask) {
mode |= 1 << 4;
}
}
return mode;
}
// Returns the pin pullup/pulldown. The value returned by this macro should
// be one of GPIO_NOPULL, GPIO_PULLUP, or GPIO_PULLDOWN.
uint32_t pin_get_pull(const pin_obj_t *pin) {
return (pin->gpio->PUPDR >> (pin->pin * 2)) & 3;
}
// Returns the af (alternate function) index currently set for a pin.
uint32_t pin_get_af(const pin_obj_t *pin) {
return (pin->gpio->AFR[pin->pin >> 3] >> ((pin->pin & 7) * 4)) & 0xf;
}