麻烦大神帮我看看为什么继电器无法吸合?附单片机程序 -

标题: 麻烦大神帮我看看为什么继电器无法吸合?附单片机程序 [打印本页]

作者: W3s2c8 时间: 2022-4-17 16:08
标题: 麻烦大神帮我看看为什么继电器无法吸合?附单片机程序
#include <STC15F2K60S2.H>
#define u8 unsigned char
#define u16 unsigned int

typedef struct
{
unsigned char b1:1;
unsigned char b2:1;
unsigned char b3:1;
unsigned char b4:1;
unsigned char b5:1;
unsigned char b6:1;
unsigned char b7:1;
unsigned char b8:1;
}bits;

typedef union
{
unsigned char hex;
bits b;
}Hextobin;

Hextobin led_ctrl,buzzer_ctrl;
u16 count;

void Device_ctrl(u8 p2data,u8 p0data)
{
P0=p0data;
P2=p2data;
P2=0;
}

void Timer2Init(void)       //1??@11.0592MHz
{
AUXR &= 0xFB;       //?????12T??
T2L = 0x66;       //??????
T2H = 0xFC;       //??????
AUXR |= 0x10;       //???2????
IE2 |= 0x04;                   //????2??
  EA = 1;
}

void start(void)
{
Device_ctrl(0xa0,0);
led_ctrl.hex=0xff;
Device_ctrl(0x80,led_ctrl.hex);
}

u8 step;

void led_process()
{
      if(count>=500)
{
      count=0;
led_ctrl.b.b1=~led_ctrl.b.b1;
Device_ctrl(0x80,led_ctrl.hex);

      step++;
}
}

void led_process2()
{
if(step==10)
{
      buzzer_ctrl.b.b4=1;
      Device_ctrl(0xa0,buzzer_ctrl.hex);
}
if(step==20)
{
      step=0;
         buzzer_ctrl.b.b4=0;
      Device_ctrl(0xa0,buzzer_ctrl.hex);
}
}

void main(void)
{
start();
Timer2Init();
while(1)
{
}
}
void t2int() interrupt 12          //????
{
count++;
led_process();
led_process2();
}

作者: 51FAN2020 时间: 2022-4-17 20:12
void Device_ctrl(u8 p2data,u8 p0data)
{
P0=p0data;
P2=p2data;
P2=0;
}
这里去掉P2=0;试试

作者: yzwzfyz 时间: 2022-4-18 17:02
硬件图呢？

作者: W3s2c8 时间: 2022-4-18 19:32

51FAN2020 发表于 2022-4-17 20:12
void Device_ctrl(u8 p2data,u8 p0data)
{
P0=p0data;

51单片机P2口不是控制锁存器的么，如果不设置关闭锁存器不会有影响么

作者: jshine 时间: 2022-4-19 11:29
继电器无法吸合一般是供电不足引起，也可能输入接反了

作者: laowang123222 时间: 2022-4-19 12:37
大概率是继电器信号线接反了，还有别接在单片机的P0口，然后看看继电器是高电平触发还是低电平触发

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