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cpu/stm32f0: added gpio_init_analog()

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This commit is contained in:
Hauke Petersen 2016-02-13 13:05:21 +01:00
parent b97afdc1b1
commit cfac198fc8
2 changed files with 16 additions and 0 deletions
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7
cpu/stm32f0/include/periph_cpu.h
View File

@ -87,6 +87,13 @@ typedef enum {
*/
void gpio_init_af(gpio_t pin, gpio_af_t af);
/**
* @brief Configure the given pin to be used as ADC input
*
* @param[in] pin pin to configure
*/
void gpio_init_analog(gpio_t pin);
#ifdef __cplusplus
}
#endif

9
cpu/stm32f0/periph/gpio.c
View File

@ -140,6 +140,15 @@ void gpio_init_af(gpio_t pin, gpio_af_t af)
port->AFR[(pin_num > 7) ? 1 : 0] |= (af << ((pin_num & 0x07) * 4));
}
void gpio_init_analog(gpio_t pin)
{
/* enable clock, needed as this function can be used without calling
* gpio_init first */
RCC->AHBENR |= (RCC_AHBENR_GPIOAEN << _port_num(pin));
/* set to analog mode */
_port(pin)->MODER |= (0x3 << (2 * _pin_num(pin)));
}
void gpio_irq_enable(gpio_t pin)
{
EXTI->IMR |= (1 << _pin_num(pin));