You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
36 lines
869 B
36 lines
869 B
7 years ago
|
void set_gpio_mode(GPIO_TypeDef *GPIO, int pin, int mode) {
|
||
|
|
uint32_t tmp = GPIO->MODER;
|
||
|
|
tmp &= ~(3 << (pin*2));
|
||
|
|
tmp |= (mode << (pin*2));
|
||
|
|
GPIO->MODER = tmp;
|
||
|
|
}
|
||
|
|
|
||
|
|
void set_gpio_output(GPIO_TypeDef *GPIO, int pin, int val) {
|
||
|
|
if (val) {
|
||
|
|
GPIO->ODR |= (1 << pin);
|
||
|
|
} else {
|
||
|
|
GPIO->ODR &= ~(1 << pin);
|
||
|
|
}
|
||
|
|
set_gpio_mode(GPIO, pin, MODE_OUTPUT);
|
||
|
|
}
|
||
|
|
|
||
|
|
void set_gpio_alternate(GPIO_TypeDef *GPIO, int pin, int mode) {
|
||
|
|
uint32_t tmp = GPIO->AFR[pin>>3];
|
||
|
|
tmp &= ~(0xF << ((pin&7)*4));
|
||
|
|
tmp |= mode << ((pin&7)*4);
|
||
|
|
GPIO->AFR[pin>>3] = tmp;
|
||
|
|
set_gpio_mode(GPIO, pin, MODE_ALTERNATE);
|
||
|
|
}
|
||
|
|
|
||
|
|
void set_gpio_pullup(GPIO_TypeDef *GPIO, int pin, int mode) {
|
||
|
|
uint32_t tmp = GPIO->PUPDR;
|
||
|
|
tmp &= ~(3 << (pin*2));
|
||
|
|
tmp |= (mode << (pin*2));
|
||
|
|
GPIO->PUPDR = tmp;
|
||
|
|
}
|
||
|
|
|
||
|
|
int get_gpio_input(GPIO_TypeDef *GPIO, int pin) {
|
||
|
|
return (GPIO->IDR & (1 << pin)) == (1 << pin);
|
||
|
|
}
|
||
|
|
|