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/*---------------------------------------------------------------------*/
/* --- STC MCU Limited ------------------------------------------------*/
/* --- STC 1T Series MCU Demo Programme -------------------------------*/
/* 如果要在程序中使用此代碼,請(qǐng)?jiān)诔绦蛑凶⒚魇褂昧薙TC的資料及程序 */
/*---------------------------------------------------------------------*/
/************* 功能說(shuō)明 **************
本例程基于STC8H8K64U為主控芯片的實(shí)驗(yàn)箱9進(jìn)行編寫(xiě)測(cè)試，STC8H系列芯片可通用參考.
高級(jí)PWM定時(shí)器 PWM1P/PWM1N,PWM2P/PWM2N,PWM3P/PWM3N,PWM4P/PWM4N 每個(gè)通道都可獨(dú)立實(shí)現(xiàn)PWM輸出，或者兩兩互補(bǔ)對(duì)稱輸出.
演示使用PWM1P,PWM1N產(chǎn)生互補(bǔ)的SPWM.
主時(shí)鐘選擇24MHZ, PWM時(shí)鐘選擇1T, PWM周期2400, 死區(qū)12個(gè)時(shí)鐘(0.5us).正弦波表用200點(diǎn).
輸出正弦波頻率 = 24000000 / 2400 / 200 = 50 HZ.
本程序僅僅是一個(gè)SPWM的演示程序, 用戶可以通過(guò)上面的計(jì)算方法修改PWM周期和正弦波的點(diǎn)數(shù)和幅度.
本程序輸出頻率固定, 如果需要變頻, 請(qǐng)用戶自己設(shè)計(jì)變頻方案.
本程序從P6.0(PWM1P)輸出正相脈沖, 從P6.1(PWM1N)輸出反相脈沖(互補(bǔ)).
******************************************/
#include "reg51.h" //包含此頭文件后，里面聲明的寄存器不需要再手動(dòng)輸入，避免重復(fù)定義
#include "intrins.h"
#include "T_SineTable.h"
#define MAIN_Fosc 24000000L //定義主時(shí)鐘
typedef unsigned char u8;
typedef unsigned int u16;
typedef unsigned long u32;
//手動(dòng)輸入聲明"reg51.h"頭文件里面沒(méi)有定義的寄存器
sfr TH2 = 0xD6;
sfr TL2 = 0xD7;
sfr IE2 = 0xAF;
sfr INT_CLKO = 0x8F;
sfr AUXR = 0x8E;
sfr P_SW1 = 0xA2;
sfr P_SW2 = 0xBA;
sfr P4 = 0xC0;
sfr P5 = 0xC8;
sfr P6 = 0xE8;
sfr P7 = 0xF8;
sfr P1M1 = 0x91; //PxM1.n,PxM0.n =00--->Standard, 01--->push-pull
sfr P1M0 = 0x92; // =10--->pure input, 11--->open drain
sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr P3M1 = 0xB1;
sfr P3M0 = 0xB2;
sfr P4M1 = 0xB3;
sfr P4M0 = 0xB4;
sfr P5M1 = 0xC9;
sfr P5M0 = 0xCA;
sfr P6M1 = 0xCB;
sfr P6M0 = 0xCC;
sfr P7M1 = 0xE1;
sfr P7M0 = 0xE2;
sbit P00 = P0^0;
sbit P01 = P0^1;
sbit P02 = P0^2;
sbit P03 = P0^3;
sbit P04 = P0^4;
sbit P05 = P0^5;
sbit P06 = P0^6;
sbit P07 = P0^7;
sbit P10 = P1^0;
sbit P11 = P1^1;
sbit P12 = P1^2;
sbit P13 = P1^3;
sbit P14 = P1^4;
sbit P15 = P1^5;
sbit P16 = P1^6;
sbit P17 = P1^7;
sbit P20 = P2^0;
sbit P21 = P2^1;
sbit P22 = P2^2;
sbit P23 = P2^3;
sbit P24 = P2^4;
sbit P25 = P2^5;
sbit P26 = P2^6;
sbit P27 = P2^7;
sbit P30 = P3^0;
sbit P31 = P3^1;
sbit P32 = P3^2;
sbit P33 = P3^3;
sbit P34 = P3^4;
sbit P35 = P3^5;
sbit P36 = P3^6;
sbit P37 = P3^7;
sbit P40 = P4^0;
sbit P41 = P4^1;
sbit P42 = P4^2;
sbit P43 = P4^3;
sbit P44 = P4^4;
sbit P45 = P4^5;
sbit P46 = P4^6;
sbit P47 = P4^7;
sbit P50 = P5^0;
sbit P51 = P5^1;
sbit P52 = P5^2;
sbit P53 = P5^3;
sbit P54 = P5^4;
sbit P55 = P5^5;
sbit P56 = P5^6;
sbit P57 = P5^7;
/****************************** 用戶定義宏 ***********************************/
#define PWMA_ENO (*(unsigned char volatile xdata *) 0xFEB1)
#define PWMA_PS (*(unsigned char volatile xdata *) 0xFEB2)
#define PWMA_CR1 (*(unsigned char volatile xdata *) 0xFEC0)
#define PWMA_CR2 (*(unsigned char volatile xdata *) 0xFEC1)
#define PWMA_SMCR (*(unsigned char volatile xdata *) 0xFEC2)
#define PWMA_ETR (*(unsigned char volatile xdata *) 0xFEC3)
#define PWMA_IER (*(unsigned char volatile xdata *) 0xFEC4)
#define PWMA_SR1 (*(unsigned char volatile xdata *) 0xFEC5)
#define PWMA_SR2 (*(unsigned char volatile xdata *) 0xFEC6)
#define PWMA_EGR (*(unsigned char volatile xdata *) 0xFEC7)
#define PWMA_CCMR1 (*(unsigned char volatile xdata *) 0xFEC8)
#define PWMA_CCMR2 (*(unsigned char volatile xdata *) 0xFEC9)
#define PWMA_CCMR3 (*(unsigned char volatile xdata *) 0xFECA)
#define PWMA_CCMR4 (*(unsigned char volatile xdata *) 0xFECB)
#define PWMA_CCER1 (*(unsigned char volatile xdata *) 0xFECC)
#define PWMA_CCER2 (*(unsigned char volatile xdata *) 0xFECD)
#define PWMA_CNTRH (*(unsigned char volatile xdata *) 0xFECE)
#define PWMA_CNTRL (*(unsigned char volatile xdata *) 0xFECF)
#define PWMA_PSCRH (*(unsigned char volatile xdata *) 0xFED0)
#define PWMA_PSCRL (*(unsigned char volatile xdata *) 0xFED1)
#define PWMA_ARRH (*(unsigned char volatile xdata *) 0xFED2)
#define PWMA_ARRL (*(unsigned char volatile xdata *) 0xFED3)
#define PWMA_RCR (*(unsigned char volatile xdata *) 0xFED4)
#define PWMA_CCR1H (*(unsigned char volatile xdata *) 0xFED5)
#define PWMA_CCR1L (*(unsigned char volatile xdata *) 0xFED6)
#define PWMA_CCR2H (*(unsigned char volatile xdata *) 0xFED7)
#define PWMA_CCR2L (*(unsigned char volatile xdata *) 0xFED8)
#define PWMA_CCR3H (*(unsigned char volatile xdata *) 0xFED9)
#define PWMA_CCR3L (*(unsigned char volatile xdata *) 0xFEDA)
#define PWMA_CCR4H (*(unsigned char volatile xdata *) 0xFEDB)
#define PWMA_CCR4L (*(unsigned char volatile xdata *) 0xFEDC)
#define PWMA_BKR (*(unsigned char volatile xdata *) 0xFEDD)
#define PWMA_DTR (*(unsigned char volatile xdata *) 0xFEDE)
#define PWMA_OISR (*(unsigned char volatile xdata *) 0xFEDF)
/*****************************************************************************/
#define PWM1_1 0x00 //P:P1.0 N:P1.1
#define PWM1_2 0x01 //P:P2.0 N:P2.1
#define PWM1_3 0x02 //P:P6.0 N:P6.1
#define PWM2_1 0x00 //P:P1.2/P5.4 N:P1.3
#define PWM2_2 0x04 //P:P2.2 N:P2.3
#define PWM2_3 0x08 //P:P6.2 N:P6.3
#define PWM3_1 0x00 //P:P1.4 N:P1.5
#define PWM3_2 0x10 //P:P2.4 N:P2.5
#define PWM3_3 0x20 //P:P6.4 N:P6.5
#define PWM4_1 0x00 //P:P1.6 N:P1.7
#define PWM4_2 0x40 //P:P2.6 N:P2.7
#define PWM4_3 0x80 //P:P6.6 N:P6.7
#define PWM4_4 0xC0 //P:P3.4 N:P3.3
#define ENO1P 0x01
#define ENO1N 0x02
#define ENO2P 0x04
#define ENO2N 0x08
#define ENO3P 0x10
#define ENO3N 0x20
#define ENO4P 0x40
#define ENO4N 0x80
/************* 本地變量聲明 **************/
u16 PWM1_Duty;
u8 PWM_Index; //SPWM查表索引
/******************** 主函數(shù) **************************/
void main(void)
{
P_SW2 |= 0x80; //擴(kuò)展寄存器(XFR)訪問(wèn)使能
P0M1 = 0x00; P0M0 = 0x00; //設(shè)置為準(zhǔn)雙向口
P1M1 = 0x00; P1M0 = 0x00; //設(shè)置為準(zhǔn)雙向口
P2M1 = 0x00; P2M0 = 0x00; //設(shè)置為準(zhǔn)雙向口
P3M1 = 0x00; P3M0 = 0x00; //設(shè)置為準(zhǔn)雙向口
P4M1 = 0x00; P4M0 = 0x00; //設(shè)置為準(zhǔn)雙向口
P5M1 = 0x00; P5M0 = 0x00; //設(shè)置為準(zhǔn)雙向口
P6M1 = 0x00; P6M0 = 0x00; //設(shè)置為準(zhǔn)雙向口
P7M1 = 0x00; P7M0 = 0x00; //設(shè)置為準(zhǔn)雙向口
PWM1_Duty = 1220;
PWMA_CCER1 = 0x00; //寫(xiě) CCMRx 前必須先清零 CCxE 關(guān)閉通道
PWMA_CCER2 = 0x00;
PWMA_CCMR1 = 0x68; //通道模式配置
// PWMA_CCMR2 = 0x68;
// PWMA_CCMR3 = 0x68;
// PWMA_CCMR4 = 0x68;
PWMA_CCER1 = 0x05; //配置通道輸出使能和極性
// PWMA_CCER2 = 0x55;
PWMA_ARRH = 0x09; //設(shè)置周期時(shí)間
PWMA_ARRL = 0x60;
PWMA_CCR1H = (u8)(PWM1_Duty >> 8); //設(shè)置占空比時(shí)間
PWMA_CCR1L = (u8)(PWM1_Duty);
PWMA_DTR = 0x0C; //設(shè)置死區(qū)時(shí)間
PWMA_ENO = 0x00;
PWMA_ENO |= ENO1P; //使能輸出
PWMA_ENO |= ENO1N; //使能輸出
// PWMA_ENO |= ENO2P; //使能輸出
// PWMA_ENO |= ENO2N; //使能輸出
// PWMA_ENO |= ENO3P; //使能輸出
// PWMA_ENO |= ENO3N; //使能輸出
// PWMA_ENO |= ENO4P; //使能輸出
// PWMA_ENO |= ENO4N; //使能輸出
PWMA_PS = 0x00; //高級(jí) PWM 通道輸出腳選擇位
PWMA_PS |= PWM1_3; //選擇 PWM1_3 通道
// PWMA_PS |= PWM2_3; //選擇 PWM2_3 通道
// PWMA_PS |= PWM3_3; //選擇 PWM3_3 通道
// PWMA_PS |= PWM4_3; //選擇 PWM4_3 通道
PWMA_BKR = 0x80; //使能主輸出
PWMA_IER = 0x01; //使能中斷
PWMA_CR1 |= 0x01; //開(kāi)始計(jì)時(shí)
EA = 1; //打開(kāi)總中斷
while (1)
{
}
}
/******************** 中斷函數(shù) **************************/
void PWMA_ISR() interrupt 26
{
if(PWMA_SR1 & 0X01)
{
PWMA_SR1 &=~0X01;
PWM1_Duty = T_SinTable[PWM_Index];
if(++PWM_Index >= 200) PWM_Index = 0;
PWMA_CCR1H = (u8)(PWM1_Duty >> 8); //設(shè)置占空比時(shí)間
PWMA_CCR1L = (u8)(PWM1_Duty);
}
PWMA_SR1 = 0;
}
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