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最近在項(xiàng)目上，用到鼠標(biāo)上用的編碼器，按照廠家給的編程方法，發(fā)現(xiàn)容易產(chǎn)生誤判，故而自己用外部中斷的方式來做，發(fā)現(xiàn)這樣誤判的情況會(huì)得到很大的改善，現(xiàn)發(fā)上來與大家分享。
#include "stm8s103f3p.h"
#include "stm8s_bitsdefine.h"
#include "typedef.h"
#define CodeA PB_IDR_0
#define CodeB PB_IDR_1
uint8_t CodeB_last,CodeB_current,whe_ch,ADJ;
void UART1_Init(void)
{
UART1_CR2=0x00;
UART1_CR1=0x00;
UART1_CR3=0x00;
UART1_BRR2=0x00;
UART1_BRR1=0x0d;
UART1_CR2=0x2C;
}
void UART1_SendChar(uint8_t ch)
{
while((UART1_SR & 0x80) == 0x00);
UART1_DR = ch;
}
void IO_Init(void)
{
PB_DDR=0x04;
PB_CR1=0x07;
PB_CR2=0x01;
}
void EXTI1_INIT(void)
{
EXTI_CR1=0x08;
}
main()
{
IO_Init();
EXTI1_INIT();
UART1_Init();
_asm("rim");
while(1) ;
}
@far @interrupt void EXTI1_IRQHandler(void)
{
_asm("sim");
whe_ch++;
if(whe_ch==1)
{
CodeB_last=CodeB;
IO_Init();
EXTI_CR1=0x04;
}
if(whe_ch==2)
{
whe_ch=0;
CodeB_current=CodeB;
IO_Init();
EXTI_CR1=0x08;
}
if((CodeB_last==1)&&(CodeB_current==0))
{
ADJ++;
UART1_SendChar(ADJ);
}
if((CodeB_last==0)&&(CodeB_current==1))
{
ADJ--;
UART1_SendChar(ADJ);
}
_asm("rim");
return;
}
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