The most concise stm32 encoder program-EEWORLD

Collect

#define ROTATE_A PAin(2)
#define ROTATE_B PAin(3)
s16 DATA=0;
void EXTI2_IRQHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line2) != RESET)
{
if(ROTATE_A!=ROTATE_B)
{
DATA++;
}
else DATA--;
EXTI_ClearITPendingBit(EXTI_Line2);
}
}
void main(void)
{
SystemInit();
delay_init(72);
NVIC_Configuration();
KEY_Init();
while(1)
{
;
}
}

[Repost] The most concise stm32 encoder program - My Heart Will Go On - ARM Embedded Development

You can observe the picture. When it is clockwise, when A falls, A! = B; when it is counterclockwise, when A falls, A=B, so as to judge whether it is clockwise or counterclockwise. And it is simple to implement, only one interrupt is needed. In fact, I saw the idea somewhere else, and then copied it and modified it. If you encounter an encoder with AB output, you can refer to it. If you have any questions, you can raise them and learn from each other.

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