1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
/* USER CODE BEGIN 2 */
uint8_t key_state1=0,key_state2=0;
uint32_t key_time1=0,key_time2=0;
/**
* @brief KEY_SACN
* @param GPIOx
*
* @retval KEY
*/
uint8_t Key_Scan(GPIO_TypeDef* GPIOx,uint32_t GPIO_Pin)
{
if(GPIOx==KEY1_GPIO_Port && GPIO_Pin==KEY1_Pin)
{
/*检测是否有按键按下 */
if(key_state1==0)
{
if (LL_GPIO_IsInputPinSet(GPIOx, GPIO_Pin) == KEY_ON)
{
key_state1=1;//开始消抖
}
}
else if(key_state1==2)//消抖完成
{
if (LL_GPIO_IsInputPinSet(GPIOx, GPIO_Pin) == KEY_OFF)
{
key_state1=0;
key_time1=0;
return KEY_ON;
}
}
else if(LL_GPIO_IsInputPinSet(GPIOx, GPIO_Pin) == KEY_OFF)
{
key_state1=0;
key_time1=0;
}
return KEY_OFF;
} else if(GPIOx==KEY2_GPIO_Port && GPIO_Pin==KEY2_Pin)
{
/*检测是否有按键按下 */
if(key_state2==0)
{
if (LL_GPIO_IsInputPinSet(GPIOx, GPIO_Pin) == KEY_ON)
{
key_state2=1;//开始消抖
}
}
else if(key_state2==2)//消抖完成
{
if (LL_GPIO_IsInputPinSet(GPIOx, GPIO_Pin) == KEY_OFF)
{
key_state2=0;
key_time2=0;
return KEY_ON;
}
}
else if(LL_GPIO_IsInputPinSet(GPIOx, GPIO_Pin) == KEY_OFF)
{
key_state2=0;
key_time2=0;
}
return KEY_OFF;
}
return KEY_OFF;
}
/* USER CODE END 2 */
stm32f1xx_it.c添加外部变量1
2
3
extern uint32_t key_time1,key_time2;
extern uint8_t key_state1,key_state2;
#define KEY_BUFFETING_TIME 20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
/**
* @brief This function handles TIM6 global interrupt.
*/
void TIM6_IRQHandler(void)
{
/* USER CODE BEGIN TIM6_IRQn 0 */
if(LL_TIM_IsActiveFlag_UPDATE(TIM6))
{
LL_TIM_ClearFlag_UPDATE(TIM6);
time++;
if(key_state1==1)
{
if(++key_time1>=KEY_BUFFETING_TIME)
{
key_state1=2;
}
}
if(key_state2==1)
{
if(++key_time2>=KEY_BUFFETING_TIME)
{
key_state2=2;
}
}
}
/* USER CODE END TIM6_IRQn 0 */
/* USER CODE BEGIN TIM6_IRQn 1 */
/* USER CODE END TIM6_IRQn 1 */
}