mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-12 09:28:10 +00:00
41 lines
1014 B
C
41 lines
1014 B
C
#include STM32_HAL_H
|
|
#include "button.h"
|
|
|
|
#define BTN_PIN_LEFT GPIO_PIN_5
|
|
#define BTN_PIN_RIGHT GPIO_PIN_2
|
|
|
|
void button_init(void) {
|
|
__HAL_RCC_GPIOC_CLK_ENABLE();
|
|
|
|
GPIO_InitTypeDef GPIO_InitStructure;
|
|
|
|
GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
|
|
GPIO_InitStructure.Pull = GPIO_PULLUP;
|
|
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
|
|
GPIO_InitStructure.Pin = BTN_PIN_LEFT | BTN_PIN_RIGHT;
|
|
HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
|
|
}
|
|
|
|
uint32_t button_read(void) {
|
|
static char last_left = 0, last_right = 0;
|
|
char left = (GPIO_PIN_RESET == HAL_GPIO_ReadPin(GPIOC, BTN_PIN_LEFT));
|
|
char right = (GPIO_PIN_RESET == HAL_GPIO_ReadPin(GPIOC, BTN_PIN_RIGHT));
|
|
if (last_left != left) {
|
|
last_left = left;
|
|
if (left) {
|
|
return BTN_EVT_DOWN | BTN_LEFT;
|
|
} else {
|
|
return BTN_EVT_UP | BTN_LEFT;
|
|
}
|
|
}
|
|
if (last_right != right) {
|
|
last_right = right;
|
|
if (right) {
|
|
return BTN_EVT_DOWN | BTN_RIGHT;
|
|
} else {
|
|
return BTN_EVT_UP | BTN_RIGHT;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|