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trezor-firmware/core/embed/trezorhal/button.c
2022-05-10 16:49:23 +02:00

65 lines
1.7 KiB
C

#include STM32_HAL_H
#include "button.h"
#if defined TREZOR_MODEL_1
#define BTN_LEFT_PIN GPIO_PIN_5
#define BTN_LEFT_PORT GPIOC
#define BTN_LEFT_CLK_ENA __HAL_RCC_GPIOC_CLK_ENABLE
#define BTN_RIGHT_PIN GPIO_PIN_2
#define BTN_RIGHT_PORT GPIOC
#define BTN_RIGHT_CLK_ENA __HAL_RCC_GPIOC_CLK_ENABLE
#elif defined TREZOR_MODEL_R
#define BTN_LEFT_PIN GPIO_PIN_0
#define BTN_LEFT_PORT GPIOA
#define BTN_LEFT_CLK_ENA __HAL_RCC_GPIOA_CLK_ENABLE
#define BTN_RIGHT_PIN GPIO_PIN_15
#define BTN_RIGHT_PORT GPIOE
#define BTN_RIGHT_CLK_ENA __HAL_RCC_GPIOE_CLK_ENABLE
#else
#error Unknown Trezor model
#endif
static char last_left = 0, last_right = 0;
void button_init(void) {
BTN_LEFT_CLK_ENA();
BTN_RIGHT_CLK_ENA();
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_LEFT_PIN;
HAL_GPIO_Init(BTN_LEFT_PORT, &GPIO_InitStructure);
GPIO_InitStructure.Pin = BTN_RIGHT_PIN;
HAL_GPIO_Init(BTN_RIGHT_PORT, &GPIO_InitStructure);
}
uint32_t button_read(void) {
char left = (GPIO_PIN_RESET == HAL_GPIO_ReadPin(BTN_LEFT_PORT, BTN_LEFT_PIN));
char right =
(GPIO_PIN_RESET == HAL_GPIO_ReadPin(BTN_RIGHT_PORT, BTN_RIGHT_PIN));
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;
}
char button_state_left(void) { return last_left; }
char button_state_right(void) { return last_right; }