1 #include "py/obj.h"
2 #include "pin.h"
3 
4 // Returns the pin mode. This value returned by this macro should be one of:
5 // GPIO_MODE_INPUT, GPIO_MODE_OUTPUT_PP, GPIO_MODE_OUTPUT_OD,
6 // GPIO_MODE_AF_PP, GPIO_MODE_AF_OD, or GPIO_MODE_ANALOG.
7 
pin_get_mode(const pin_obj_t * pin)8 uint32_t pin_get_mode(const pin_obj_t *pin) {
9     GPIO_TypeDef *gpio = pin->gpio;
10     uint32_t mode = (gpio->MODER >> (pin->pin * 2)) & 3;
11     if (mode == GPIO_MODE_OUTPUT_PP || mode == GPIO_MODE_AF_PP) {
12         if (gpio->OTYPER & pin->pin_mask) {
13             mode |= 1 << 4;     // Converts from xxx_PP to xxx_OD
14         }
15     }
16     return mode;
17 }
18 
19 // Returns the pin pullup/pulldown. The value returned by this macro should
20 // be one of GPIO_NOPULL, GPIO_PULLUP, or GPIO_PULLDOWN.
21 
pin_get_pull(const pin_obj_t * pin)22 uint32_t pin_get_pull(const pin_obj_t *pin) {
23     return (pin->gpio->PUPDR >> (pin->pin * 2)) & 3;
24 }
25 
26 // Returns the af (alternate function) index currently set for a pin.
27 
pin_get_af(const pin_obj_t * pin)28 uint32_t pin_get_af(const pin_obj_t *pin) {
29     return (pin->gpio->AFR[pin->pin >> 3] >> ((pin->pin & 7) * 4)) & 0xf;
30 }
31