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求pic16单片机产生spwm，c语言程序代码

温湿度变送器 • 2023-5-13 • 软件运维 • 阅读 41

求pic16单片机产生spwm，c语言程序代码,第1张

void

delay(uchar

i)

{

uint

x,y

for(x=ix>0x--)

for(y=100y>0y--)

}

void

main()

{

uchar

pwm

=

1,h

=

20

while(1)

{

RC3

=1

delay(pwm)

RC3

=

0

delay(h

-

pwm)

}

}

改变pwm的值(1-19)，

就可以改变输出高电平的宽度，还有其它的办法，这是最简单的，软件延时

#include<pic.h>

#include<pic16f685.h>

#include<math.h>

//__CONFIG(0X002A)//配置字，禁止欠压复位BOR，16M外部晶振，上电延时使能，禁止看门狗

__CONFIG(HS&PWRTEN&WDTEN)

//打开看门狗,选择高速晶振,上电延时复位,掉电复位使能,代码保护

float sin_am, sin_l,sin_d//浮点数,幅值变量,临时变量,临时变量

bit sin_up//sin函数正负半周标志

void intdelay()

void DELAY()

void init_start()

void CCP_start()

const unsigned char sina_[]={7 ,15 ,22 ,29 ,37 ,44 ,51 ,58 ,65 ,72 ,79 ,86 ,92 ,99 ,106 ,112 ,118

,124 ,130 ,136 ,141 ,147 ,152 ,157 ,162 ,166 ,171 ,175 ,179 ,183 ,186 ,190 ,193 ,196 ,198 ,201 ,203

,205 ,206 ,208 ,209 ,210 ,210 ,211 ,211 ,211 ,210 ,210 ,209 ,208 ,206 ,205 ,203 ,201 ,198 ,196 ,193

,190 ,186 ,183 ,179 ,175 ,171 ,166 ,162 ,157 ,152 ,147 ,141 ,136 ,130 ,124 ,118 ,112 ,106 ,99 ,92

,86 ,79 ,72 ,65 ,58 ,51 ,44 ,37 ,29 ,22 ,15 ,7 ,0

}

const unsigned char sinb_[]={7 ,15 ,22 ,29 ,37 ,44 ,51 ,58 ,65 ,72 ,79 ,86 ,92 ,99 ,106 ,112 ,118

,124 ,130 ,136 ,141 ,147 ,152 ,157 ,162 ,166 ,171 ,175 ,179 ,183 ,186 ,190 ,193 ,196 ,198 ,201 ,203

,205 ,206 ,208 ,209 ,210 ,210 ,211 ,211 ,211 ,210 ,210 ,209 ,208 ,206 ,205 ,203 ,201 ,198 ,196 ,193

,190 ,186 ,183 ,179 ,175 ,171 ,166 ,162 ,157 ,152 ,147 ,141 ,136 ,130 ,124 ,118 ,112 ,106 ,99 ,92

,86 ,79 ,72 ,65 ,58 ,51 ,44 ,37 ,29 ,22 ,15 ,7 ,0

}

//---------------------------------------------------------------------------------------

//const unsigned char sina_[]={4, 7, 11, 15, 18, 22, 26, 29, 33, 37, 40, 44, 47, 51,

// 55, 58, 62, 65, 69, 72, 76, 79, 82, 86, 89, 92, 96, 99,

// 102, 106, 109, 112, 115, 118, 121, 124, 127, 130,

// 133, 136, 138, 141, 144, 147, 149, 152, 154, 157,

// 159, 162, 164, 166, 169, 171, 173, 175, 177, 179,

//181, 183, 185, 186, 188, 190, 191, 193, 194, 196,

// 197, 198, 200, 201, 202, 203, 204, 205, 206, 206,

// 207, 208, 208, 209, 209, 210, 210, 210, 211, 211,

// 211, 211, 211, 211, 211, 210, 210, 210, 209, 209,

// 208, 208, 207, 206, 206, 205, 204, 203, 202, 201,

// 200, 198, 197, 196, 194, 193, 191, 190, 188, 186,

// 185, 183, 181, 179, 177, 175, 173, 171, 169, 166,

// 164, 162, 159, 157, 154, 152, 149, 147, 144, 141,

// 138, 136, 133, 130, 127, 124, 121, 118, 115, 112,

// 109, 106, 102, 99, 96, 92, 89, 86, 82, 79, 76, 72, 69, 65, 62, 58,

// 55, 51, 47, 44, 40, 37, 33, 29, 26, 22, 14, 7, 0, 7, 4, 0

//}

//----------------------------------------------------------------------------------

//const unsigned char sinb_[]={4, 7, 11, 15, 18, 22, 26, 29, 33, 37, 40, 44, 47, 51,

// 55, 58, 62, 65, 69, 72, 76, 79, 82, 86, 89, 92, 96, 99,

// 102, 106, 109, 112, 115, 118, 121, 124, 127, 130,

// 133, 136, 138, 141, 144, 147, 149, 152, 154, 157,

// 159, 162, 164, 166, 169, 171, 173, 175, 177, 179,

//181, 183, 185, 186, 188, 190, 191, 193, 194, 196,

// 197, 198, 200, 201, 202, 203, 204, 205, 206, 206,

// 207, 208, 208, 209, 209, 210, 210, 210, 211, 211,

// 211, 211, 211, 211, 211, 210, 210, 210, 209, 209,

// 208, 208, 207, 206, 206, 205, 204, 203, 202, 201,

// 200, 198, 197, 196, 194, 193, 191, 190, 188, 186,

// 185, 183, 181, 179, 177, 175, 173, 171, 169, 166,

// 164, 162, 159, 157, 154, 152, 149, 147, 144, 141,

// 138, 136, 133, 130, 127, 124, 121, 118, 115, 112,

// 109, 106, 102, 99, 96, 92, 89, 86, 82, 79, 76, 72, 69, 65, 62, 58,

// 55, 51, 47, 44, 40, 37, 33, 29, 26, 22, 14, 7, 0, 7, 4, 0

//}

//--------------------------------------------------------------------------------------

//const unsigned char sinb_[]=

// {219, 215, 211, 207, 204, 200, 196, 192, 188, 184,

// 180, 177, 173, 169, 165, 162, 158, 154, 150, 147,

// 143, 139, 136, 132, 129, 125, 122, 118, 115, 112,

// 108, 105, 102, 98, 95, 92, 89, 86, 83, 80, 77, 74, 71, 68, 65, 63,

// 60, 57, 55, 52, 50, 47, 45, 43, 40, 38, 36, 34, 32, 30, 28, 26, 24, 23, 21,

// 19, 18, 16, 15, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 3, 2, 2,

// 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 3, 3, 4,

// 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 18, 19, 21, 23, 24, 26, 28,

// 30, 32, 34, 36, 38, 40, 43, 45, 47, 50, 52, 55, 57, 60, 63, 65, 68, 71,

// 74, 77, 80, 83, 86, 89, 92, 95, 98, 102, 105, 108, 112, 115,

// 118, 122, 125, 129, 132, 136, 139, 143, 147,

// 150, 154, 158, 162, 165, 169, 173, 177, 180,

// 184, 188, 192, 196, 205, 215, 219, 223, 215,

// 219, 223

//}

unsigned char sin_num//SIN函数表查表变量

//===================================================================================

void main()

{

// CLRWDT()//清除看门狗

TRISB=0X00 //RB4RB5RB6RB7为输出

TRISC=0XCB //11011001设置RC0RC1RC3RC4RC6RC7为输入，其它为输出

PORTB=0X00

PORTC=0X00

//--------------------------------------

OPTION=0X42//使能PORTA上拉，RA2下降沿触发中断(上升:0X47)，内部时钟，预分频器分配给TIMER0，分频比为1:8

sin_up=0 //正负半周SIN函数

sin_num=0//脉宽周期调整计数器

PDC1=1 //死区延时0.5US

INTCON=0XE0//11100000：GIE开总中断,timer0使能，

TMR2IE=1

CCP1CON=0X8C //10001100

CCPR1L=0X00

PR2=0XDF //设置PWM的工作周期,16Mhz,PWM周期18khz

T2CON=0x04// 00100100打开TMR2,且使其后分频为比1:5，预分频比为1

GIE=1//开全局中断

while(1)

{

CLRWDT() //清除看门狗

PDC1=1

T2CON=0x04 // 00100100打开TMR2,且使其后分频为比1:5，预分频比为1,

TMR2IE=1 //打开定时器2中断使能

CCP1CON=0X8C//10001100

PR2=0XDF //设置PWM的工作周期,16Mhz,PWM周期18khz

// DELAY()

}

}

//----------------------------------------------------------

//软件延时子程序*/

voidDELAY()

{

unsigned int i

for(i=2000i>0i--)

}

//-------------中断服务程序------------------------------------

void interrupt int1(void)

{

if(TMR2IF&&TMR2IE)

{

TMR2IF=0

CLRWDT()

if(sin_num==88){sin_num=0sin_up=!sin_up}

if((sin_up==0)&&(sin_num==0)) //低频正半周

{

CCPR1L=0

CCP1CON=0

RC4=RC5=0

RB7=0

RB6=!RB6

}

if((sin_up==1)&&(sin_num==0))//低频负半周

{

CCPR1L=0

CCP1CON=0

RC4=RC5=0

RB6=0

RB7=!RB7

}

if(sin_up==0)

{

CCP1CON=0X8C

CCPR1L=sinb_[sin_num] //高频正半周

sin_num++

}

if(sin_up==1)

{

CCP1CON=0X8C

CCPR1L=sina_[sin_num] //高频负半周

sin_num++

}

}

}

linjinfeng_job@163.com 能发给一份SPWM的程序吗

1、用普通I/O口采用软件定时器中断可以模拟SPWM输出。"/**/"里面的内用是对程序的标注，解析。

2、/*采用6MHz晶振，在P1.0脚上输出周期为2.5s,占空比为20%的脉冲信号*/

/*定时100ms,周期2.5s需25次中断，高电平0.5s需5次中断*/

#include <reg51.h>

typedef unsigned char uchar

sbit P1_0=P1^0

uchar time=0

uchar period=25

uchar high=5

void timer0() interrupt 1 using 1

{

TH0=0x3c/*定时器初值重装载*/

TL0=0xb0

time++

if(time==high) /*高电平持续时间结束，变低*/

{ P1_0=0}

else if(time==period) /*周期时间到，变高*/

{ time=0

P1_0=1

}

}

void main()

{

TMOD=0x01/*定时器0方式1*/

TH0=0x3c/*定时器装载初值*/

TL0=0xb0

EA=1/*开CPU中断*/

ET0=1/*开定时器0中断*/

TR0=1/*启动定时器0*/

while(1) /*等待中断*/

{}

}

3、说明：本程序主要采用了51单片机（具体型号STC89C52RC）的定时器，工作在方式3，来产生规定时间内的方波，制造SPWM.

欢迎分享，转载请注明来源：内存溢出

原文地址: http://outofmemory.cn/yw/11106873.html

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