新手 51呼吸灯求助

只看该作者 · 2017-8-6 23:56

新手看了《手把手教你学51单片机》仿着写的下到板子小灯常亮
端口没有问题找了两天不知道问题出在哪里来求助了
#include<reg52.h>
sbit LED=P2^7;

unsigned char H_RH=0;
unsigned char H_RL=0;
unsigned char L_RH=0;
unsigned char L_RL=0;

void ConfigPWM(unsigned int FR,unsigned char DC);
void AdjustDC(unsigned char dc);

void main()
{
EA=1;
ConfigPWM(100,10);
TH1=0x3C;
TL1=0xBC;
ET1=1;
TR1=1;
while(1);
}

void ConfigPWM(unsigned int FR,unsigned char DC)
{
unsigned long per;
unsigned int high,low;
per=(12000000/12)/FR;
high=(per*DC)/100;
low=per-high;
high=65536-high+12;
low=65536-low+12;
H_RH=(unsigned char)(high>>8);
H_RL=(unsigned char)high;
L_RH=(unsigned char)(low>>8);
L_RL=(unsigned char)low;
TMOD&=0x0F;
TMOD|=0x10;
TMOD&=0xF0;
TMOD|=0x01;
TH0=H_RH;
TL0=H_RL;
ET0=1;
TR0=1;
LED=1;
}

void AdjustDC(unsigned char dc)
{
unsigned int high,low;

high=(10000*dc)/100;//10000=（（12000000/12）/100）
low=10000-high;
high=65536-high+12;
low=65536-low+12;
H_RH=(unsigned char)(high>>8);
H_RL=(unsigned char)high;
L_RH=(unsigned char)(low>>8);
L_RL=(unsigned char)low;
}

void interruptTimer0() interrupt 1
{
if(LED==1)
{
TH0=L_RH;
TL0=L_RL;
LED=0;
   }
   else
   {
     TH0=H_RH;
TL0=H_RL;
LED=1;
   }
}

void interruptTimer1() interrupt 3
{
unsigned char code DC[13]={5, 18, 30, 41, 51, 60, 68, 75, 81, 86, 90, 93, 95};
static unsigned char i=0;
static bit flag=0;
TH1=0x3C;
TL1=0xBC;
AdjustDC(DC[i]);
if(flag==0)
{
i++;
if(i==12){flag=1;}
}
else
{
i--;
if(i==0){flag=0;}
}
}

3万 · 2017-8-7 08:11

没看楼主说的那个，难道里面没教写程序的注释

只看该作者 · 2017-8-7 12:10

对程序有点陌生了，你试下把下面的全局变量
unsigned char H_RH=0;
unsigned char H_RL=0;
unsigned char L_RH=0;
unsigned char L_RL=0;
改成
unsigned char H_RH;
unsigned char H_RL;
unsigned char L_RH;
unsigned char L_RL;

只看该作者 · 2017-8-7 12:34

dirtwillfly 发表于 2017-8-7 08:11
没看楼主说的那个，难道里面没教写程序的注释

看了注释，自己写试着减少了一个设置的函数，（直接把定时器的重载值算出来了）原版我放在下面了，因为不是一个配套的板子，所以端口有点不一样

只看该作者 · 2017-8-7 12:35

#include <reg52.h>

sbit PWMOUT = P0^0;
sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;

unsigned char HighRH = 0;  //高电平重载值的高字节
unsigned char HighRL = 0;  //高电平重载值的低字节
unsigned char LowRH  = 0;  //低电平重载值的高字节
unsigned char LowRL  = 0;  //低电平重载值的低字节
unsigned char T1RH = 0;
unsigned char T1RL = 0;
unsigned long PeriodCnt = 0;

void ConfigTimer1(unsigned int ms);
void ConfigPWM(unsigned int fr, unsigned char dc);

void main()
{
EA = 1;    //开总中断
ENLED = 0;  //使能独立LED
ADDR3 = 1;
ADDR2 = 1;
ADDR1 = 1;
ADDR0 = 0;

ConfigPWM(100, 10);  //配置并启动PWM
ConfigTimer1(50); //用T1定时调整占空比
while (1);
}
void ConfigTimer1(unsigned int ms)
{
unsigned long tmp;  //临时变量

tmp = 11059200 / 12;    //定时器计数频率
tmp = (tmp * ms) / 1000;  //计算所需的计数值
tmp = 65536 - tmp;       //计算定时器重载值
tmp = tmp + 12;          //补偿中断响应延时造成的误差
T1RH = (unsigned char)(tmp>>8);  //定时器重载值拆分为高低字节
T1RL = (unsigned char)tmp;
TMOD &= 0x0F; //清零T1的控制位
TMOD |= 0x10; //配置T1为模式1
TH1 = T1RH;    //加载T1重载值
TL1 = T1RL;
ET1 = 1;       //使能T1中断
TR1 = 1;       //启动T1
}
void ConfigPWM(unsigned int fr, unsigned char dc)
{
unsigned int high, low;

PeriodCnt = (11059200/12) / fr; //计算一个周期所需的计数值
high = (PeriodCnt*dc) / 100; //计算高电平所需的计数值
low  = PeriodCnt - high;       //计算低电平所需的计数值
high = 65536 - high + 12;    //计算高电平的定时器重载值并补偿中断延时
low  = 65536 - low  + 12;    //计算低电平的定时器重载值并补偿中断延时
HighRH = (unsigned char)(high>>8); //高电平重载值拆分为高低字节
HighRL = (unsigned char)high;
LowRH  = (unsigned char)(low>>8);  //低电平重载值拆分为高低字节
LowRL  = (unsigned char)low;
TMOD &= 0xF0; //清零T0的控制位
TMOD |= 0x01; //配置T0为模式1
TH0 = HighRH; //加载T0重载值
TL0 = HighRL;
ET0 = 1;       //使能T0中断
TR0 = 1;       //启动T0
PWMOUT = 1;    //输出高电平
}
void AdjustDutyCycle(unsigned char dc)
{
unsigned int high, low;

high = (PeriodCnt*dc)/100;
low = PeriodCnt - high;
high = 65536 - high + 12;
low = 65536 - low + 12;
HighRH = (unsigned char)(high >> 8);
HighRL = (unsigned char)high;
LowRH = (unsigned char)(low >> 8);
LowRL = (unsigned char)low;
}
void InterruptTimer0() interrupt 1
{
if (PWMOUT == 1)  //当前输出为高电平时，装载低电平值并输出低电平
{
      TH0 = LowRH;
      TL0 = LowRL;
      PWMOUT = 0;
}
else             //当前输出为低电平时，装载高电平值并输出高电平
{
      TH0 = HighRH;
      TL0 = HighRL;
      PWMOUT = 1;
}
}

void InterruptTimer1() interrupt 3
{
unsigned char code table[13] = {
5, 18, 30, 41, 51, 60, 68, 75, 81, 86, 90, 93, 95
};
static bit dir = 0;
static unsigned char index = 0;

TH1 = T1RH;
TL1 = T1RL;

AdjustDutyCycle(table[index]);
if(dir == 0)
{
index++;
if(index >= 12)
{
dir = 1;
}
}
else
{
index--;
if(index == 0)
{
dir = 0;
}
}
}

只看该作者 · 2017-8-7 12:37

我修改成自己的端口，其他复制他的程序，下载到板子没问题，自己写就是找不到问题出在哪里

只看该作者 · 2017-8-7 13:05

给一个软件的呼吸灯吧
#define _BV(N)  (1 << N)
static void set_led_gradation(uint16_t hwLevel)
{
static uint16_t s_hwCounter = 0;

if (hwLevel >= s_hwCounter) {
      LED1_ON();
} else {
      LED1_OFF();
}

s_hwCounter++;
s_hwCounter &= TOP;
}

static void breath_led(void)
{
static uint16_t s_hwCounter = 0;
static int16_t s_nGray = (TOP >> 1);

s_hwCounter++;
if (!(s_hwCounter & (_BV(10)-1))) {
      s_nGray++;
      if (s_nGray == TOP) {
         s_nGray = 0;
      }
}

set_led_gradation(ABS(s_nGray - (TOP >> 1)));
}
ON和OFF就是置高置低