用電位器通過STC12C2052AD單片機片內AD和PWM控制電機無極變速
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(出處: 單片機論壇)
/********************************************************
功能 ：用電位器通過STC12C2052AD片內AD和PWM控制電機轉速
單片機;STC12C2052AD
晶振 ：12M
作者 ：蘇義江
時間 ：2015-12-4
********************************************************/
#include<STC12C2052AD.H> //頭文件
#include <intrins.h> //51基本運算（包括_nop_空函數）
#define uchar unsigned char
#define uint unsigned int
uint M;
/****************************************************
函數名：PWM初始化函數
調 用：PWM_init();
參 數：無
返回值：無
結 果：將PCA初始化爲PWM模式，初始佔空比爲0
備 注：需要更多路PWM輸出直接插入CCAPnH和CCAPnL即可
/********************************************************/
void PWM_init (void)
{
CMOD=0x02; //設置PCA定時器
CL=0x00;
CH=0x00;
CCAPM0=0x42; //PWM0設置PCA工作方式爲PWM方式（0100 0010）
CCAP0L=0x00; //設置PWM0初始值與CCAP0H相同
CCAP0H=0x00; // PWM0初始時爲0
CCAPM1=0x42; //PWM1設置PCA工作方式爲PWM方式（使用時刪除//）
CCAP1L=0x00; //設置PWM1初始值與CCAP0H相同
CCAP1H=0x00; // PWM1初始時爲0
//CCAPM2=0x42; //PWM2設置PCA工作方式爲PWM方式
//CCAP2L=0x00; //設置PWM2初始值與CCAP0H相同
//CCAP2H=0x00; // PWM2初始時爲0
//CCAPM3=0x42; //PWM3設置PCA工作方式爲PWM方式
//CCAP3L=0x00; //設置PWM3初始值與CCAP0H相同
//CCAP3H=0x00; // PWM3初始時爲0
CR=1; //啓動PCA定時器
}
/**********************************************************/
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=420;y>0;y--);
}
/******************************************************
函數名：PWM0佔空比設置函數
調 用：PWM0_set();
參 數：0x00~0xFF（亦可用0~255）
返回值：無
結 果：設置PWM模式佔空比，爲0時全部高電平，爲1時全部低電平
備 注：如果需要PWM1的設置函數，只要把CCAP0L和CCAP0H中的0改爲1即可
/***********************************************/
void PWM0_set (uchar a)//p3^7輸出PWM
{
CCAP0L= a; //設置值直接寫入CCAP0L
CCAP0H= a; //設置值直接寫入CCAP0H
}
/***********************************************/
void PWM1_set (uchar a)//P3^5輸出PWM
{
CCAP1L= a; //設置值直接寫入CCAP0L
CCAP1H= a; //設置值直接寫入CCAP0H
}
/************************AD轉換***************************/
uchar Read (uchar CHA)
{
uchar AD_FIN=0; //存儲A/D轉換標誌
/******以下爲ADC初始化程序****************************/
CHA &= 0x07; //選擇ADC的8個接口中的一個
//（0000 0111 清0高5位）
ADC_CONTR = 0x40; //ADC轉換的速度設定
_nop_(); _nop_(); _nop_(); _nop_();
ADC_CONTR |= CHA; //選擇A/D當前通道
_nop_();_nop_(); _nop_(); _nop_();
ADC_CONTR |= 0x80; //啓動A/D電源
delay(2); //使輸入電壓達到穩定（1ms即可?
/******以下爲ADC執行程序****************************/
ADC_CONTR |= 0x08; //啓動A/D轉換（0000 1000 令ADCS = 1）
_nop_();_nop_(); _nop_(); _nop_();
while (AD_FIN ==0)
{ //等待A/D轉換結束
AD_FIN=(ADC_CONTR & 0x10); //0001 0000測試A/D轉換結束否
}
ADC_CONTR &=0xE7; //1111 0111 清ADC_FLAG位, 關閉A/D轉換,
return (ADC_DATA);//返回A/D轉換結果（8位）
}
void main (void)
{
PWM_init(); //PWM初始化
P1M0 = 0x01; //P1.0/P1.1：0000 0011（高阻）
P1M1 = 0x00; //P1.0/P1.1：0000 0000 ON=1;
// PWM0_set(80); //設置PWM初始佔空比
// PWM1_set (80);
while(1)
{
M=Read(0); //P1.0口模擬量轉換
PWM0_set(M); //轉換結果爲PWM0賦值 P3^7輸出佔空比
M=Read(1); //P1.1口模擬量轉換
PWM1_set(M); //轉換結果爲PWM0賦值 P3^5輸出佔空比
}
}
複製代碼
#ifndef __STC12C2052AD_H_
#define __STC12C2052AD_H_
/////////////////////////////////////////////////
/* The following is STC additional SFR or change */
/* sfr AUXR = 0x8e; */
/* sfr IPH = 0xb7; */
/* Watchdog Timer Register */
sfr WDT_CONTR = 0xe1;
/* ISP_IAP_EEPROM Register */
sfr ISP_DATA = 0xe2;
sfr ISP_ADDRH = 0xe3;
sfr ISP_ADDRL = 0xe4;
sfr ISP_CMD = 0xe5;
sfr ISP_TRIG = 0xe6;
sfr ISP_CONTR = 0xe7;
/* IDLE, Clock Divider */
sfr IDLE_CLK = 0xc7;
/* I_O Port Mode Set Register */
sfr P0M0 = 0x93;
sfr P0M1 = 0x94;
sfr P1M0 = 0x91;
sfr P1M1 = 0x92;
sfr P2M0 = 0x95;
sfr P2M1 = 0x96;
sfr P3M0 = 0xb1;
sfr P3M1 = 0xb2;
/* SPI Register */
sfr SPSTAT = 0x84;
sfr SPCTL = 0x85;
sfr SPDAT = 0x86;
/* ADC Register */
sfr ADC_CONTR = 0xc5;
sfr ADC_DATA = 0xc6;
sfr ADC_LOW2 = 0xbe;
sfr P1ASF=0x9d;
sfr ADC_RES =0xbd;
sfr ADC_RESL =0XBE;
//zhuanhuan sulv
#define ADC_SPEEDLL 0X00
#define ADC_SPEEDL 0X20
#define ADC_SPEEDH 0X40//
#define ADC_SPEEDHH 0X60//90
/* PCA SFR */
sfr CCON = 0xD8;
sfr CMOD = 0xD9;
sfr CCAPM0 = 0xDA;
sfr CCAPM1 = 0xDB;
sfr CCAPM2 = 0xDC;
sfr CCAPM3 = 0xDD;
sfr CCAPM4 = 0xDE;
sfr CCAPM5 = 0xDF;
sfr CL = 0xE9;
sfr CCAP0L = 0xEA;
sfr CCAP1L = 0xEB;
sfr CCAP2L = 0xEC;
sfr CCAP3L = 0xED;
sfr CCAP4L = 0xEE;
sfr CCAP5L = 0xEF;
sfr CH = 0xF9;
sfr CCAP0H = 0xFA;
sfr CCAP1H = 0xFB;
sfr CCAP2H = 0xFC;
sfr CCAP3H = 0xFD;
sfr CCAP4H = 0xFE;
sfr CCAP5H = 0xFF;
sfr PCA_PWM0 = 0xF2;
sfr PCA_PWM1 = 0xF3;
sfr PCA_PWM2 = 0xF4;
sfr PCA_PWM3 = 0xF5;
sfr PCA_PWM4 = 0xF6;
sfr PCA_PWM5 = 0xF7;
/* CCON */
sbit CF = CCON^7;
sbit CR = CCON^6;
sbit CCF5 = CCON^5;
sbit CCF4 = CCON^4;
sbit CCF3 = CCON^3;
sbit CCF2 = CCON^2;
sbit CCF1 = CCON^1;
sbit CCF0 = CCON^0;
/* Above is STC additional SFR or change */
/*--------------------------------------------------------------------------
REG51F.H
Header file for 8xC31/51, 80C51Fx, 80C51Rx+
Copyright (c) 1988-1999 Keil Elektronik GmbH and Keil Software, Inc.
All rights reserved.
Modification according to DataSheet from April 1999
- SFR's AUXR and AUXR1 added for 80C51Rx+ derivatives
--------------------------------------------------------------------------*/
/* BYTE Registers */
sfr P0 = 0x80;
sfr P1 = 0x90;
sfr P2 = 0xA0;
sfr P3 = 0xB0;
sfr PSW = 0xD0;
sfr ACC = 0xE0;
sfr B = 0xF0;
sfr SP = 0x81;
sfr DPL = 0x82;
sfr DPH = 0x83;
sfr PCON = 0x87;
sfr TCON = 0x88;
sfr TMOD = 0x89;
sfr TL0 = 0x8A;
sfr TL1 = 0x8B;
sfr TH0 = 0x8C;
sfr TH1 = 0x8D;
sfr IE = 0xA8;
sfr IP = 0xB8;
sfr SCON = 0x98;
sfr SBUF = 0x99;
/* 80C51Fx/Rx Extensions */
sfr AUXR = 0x8E;
/* sfr AUXR1 = 0xA2; */
sfr SADDR = 0xA9;
sfr IPH = 0xB7;
sfr SADEN = 0xB9;
sfr T2CON = 0xC8;
sfr T2MOD = 0xC9;
sfr RCAP2L = 0xCA;
sfr RCAP2H = 0xCB;
sfr TL2 = 0xCC;
sfr TH2 = 0xCD;
/* BIT Registers */
/* PSW */
sbit CY = PSW^7;
sbit AC = PSW^6;
sbit F0 = PSW^5;
sbit RS1 = PSW^4;
sbit RS0 = PSW^3;
sbit OV = PSW^2;
sbit P = PSW^0;
/* TCON */
sbit TF1 = TCON^7;
sbit TR1 = TCON^6;
sbit TF0 = TCON^5;
sbit TR0 = TCON^4;
sbit IE1 = TCON^3;
sbit IT1 = TCON^2;
sbit IE0 = TCON^1;
sbit IT0 = TCON^0;
/* P3 */
sbit RD = P3^7;
sbit WR = P3^6;
sbit T1 = P3^5;
sbit T0 = P3^4;
sbit INT1 = P3^3;
sbit INT0 = P3^2;
sbit TXD = P3^1;
sbit RXD = P3^0;
/* SCON */
sbit SM0 = SCON^7; // alternatively "FE"
sbit FE = SCON^7;
sbit SM1 = SCON^6;
sbit SM2 = SCON^5;
sbit REN = SCON^4;
sbit TB8 = SCON^3;
sbit RB8 = SCON^2;
sbit TI = SCON^1;
sbit RI = SCON^0;
sbit T2EX = P1^1;
sbit T2 = P1^0;
/* T2CON */
sbit TF2 = T2CON^7;
sbit EXF2 = T2CON^6;
sbit RCLK = T2CON^5;
sbit TCLK = T2CON^4;
sbit EXEN2 = T2CON^3;
sbit TR2 = T2CON^2;
sbit C_T2 = T2CON^1;
sbit CP_RL2= T2CON^0;
/* PCA Pin */
sbit CEX3 = P2^4;
sbit CEX2 = P2^0;
sbit CEX1 = P3^5;
sbit CEX0 = P3^7;
sbit ECI = P3^4;
/* IE */
sbit EA = IE^7;
sbit EPCA_LVD = IE^6;
sbit EADC_SPI = IE^5;
sbit ES = IE^4;
sbit ET1 = IE^3;
sbit EX1 = IE^2;
sbit ET0 = IE^1;
sbit EX0 = IE^0;
/* IP */
sbit PPCA_LVD = IP^6;
sbit PADC_SPI = IP^5;
sbit PS = IP^4;
sbit PT1 = IP^3;
sbit PX1 = IP^2;
sbit PT0 = IP^1;
sbit PX0 = IP^0;
/////////////////////////////////////////////////
#endif