/*---------------------------------------------------------------------*/
/* --- STC MCU Limited ------------------------------------------------*/
/* --- STC 1T Series MCU Demo Programme -------------------------------*/
/* 如果要在程序中使用此代码,请在程序中注明使用了STC的资料及程序 */
/*---------------------------------------------------------------------*/
/************* 功能说明 **************
本例程基于STC8H8K64U为主控芯片的实验箱9进行编写测试,STC8H系列芯片可通用参考.
高级PWM定时器 PWM1P/PWM1N,PWM2P/PWM2N,PWM3P/PWM3N,PWM4P/PWM4N 每个通道都可独立实现PWM输出,或者两两互补对称输出.
演示使用PWM1P,PWM1N产生互补的SPWM.
主时钟选择24MHZ, PWM时钟选择1T, PWM周期2400, 死区12个时钟(0.5us).正弦波表用200点.
输出正弦波频率 = 24000000 / 2400 / 200 = 50 HZ.
本程序仅仅是一个SPWM的演示程序, 用户可以通过上面的计算方法修改PWM周期和正弦波的点数和幅度.
本程序输出频率固定, 如果需要变频, 请用户自己设计变频方案.
本程序从P6.0(PWM1P)输出正相脉冲, 从P6.1(PWM1N)输出反相脉冲(互补).
******************************************/
#include "reg51.h" //包含此头文件后,里面声明的寄存器不需要再手动输入,避免重复定义
#include "intrins.h"
#include "T_SineTable.h"
#define MAIN_Fosc 24000000L //定义主时钟
typedef unsigned char u8;
typedef unsigned int u16;
typedef unsigned long u32;
//手动输入声明"reg51.h"头文件里面没有定义的寄存器
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;
/****************************** 用户定义宏 ***********************************/
#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
/************* 本地变量声明 **************/
u16 PWM1_Duty;
u8 PWM_Index; //SPWM查表索引
/******************** 主函数 **************************/
void main(void)
{
P_SW2 |= 0x80; //扩展寄存器(XFR)访问使能
P0M1 = 0x00; P0M0 = 0x00; //设置为准双向口
P1M1 = 0x00; P1M0 = 0x00; //设置为准双向口
P2M1 = 0x00; P2M0 = 0x00; //设置为准双向口
P3M1 = 0x00; P3M0 = 0x00; //设置为准双向口
P4M1 = 0x00; P4M0 = 0x00; //设置为准双向口
P5M1 = 0x00; P5M0 = 0x00; //设置为准双向口
P6M1 = 0x00; P6M0 = 0x00; //设置为准双向口
P7M1 = 0x00; P7M0 = 0x00; //设置为准双向口
PWM1_Duty = 1220;
PWMA_CCER1 = 0x00; //写 CCMRx 前必须先清零 CCxE 关闭通道
PWMA_CCER2 = 0x00;
PWMA_CCMR1 = 0x68; //通道模式配置
// PWMA_CCMR2 = 0x68;
// PWMA_CCMR3 = 0x68;
// PWMA_CCMR4 = 0x68;
PWMA_CCER1 = 0x05; //配置通道输出使能和极性
// PWMA_CCER2 = 0x55;
PWMA_ARRH = 0x09; //设置周期时间
PWMA_ARRL = 0x60;
PWMA_CCR1H = (u8)(PWM1_Duty >> 8); //设置占空比时间
PWMA_CCR1L = (u8)(PWM1_Duty);
PWMA_DTR = 0x0C; //设置死区时间
PWMA_ENO = 0x00;
PWMA_ENO |= ENO1P; //使能输出
PWMA_ENO |= ENO1N; //使能输出
// PWMA_ENO |= ENO2P; //使能输出
// PWMA_ENO |= ENO2N; //使能输出
// PWMA_ENO |= ENO3P; //使能输出
// PWMA_ENO |= ENO3N; //使能输出
// PWMA_ENO |= ENO4P; //使能输出
// PWMA_ENO |= ENO4N; //使能输出
PWMA_PS = 0x00; //高级 PWM 通道输出脚选择位
PWMA_PS |= PWM1_3; //选择 PWM1_3 通道
// PWMA_PS |= PWM2_3; //选择 PWM2_3 通道
// PWMA_PS |= PWM3_3; //选择 PWM3_3 通道
// PWMA_PS |= PWM4_3; //选择 PWM4_3 通道
PWMA_BKR = 0x80; //使能主输出
PWMA_IER = 0x01; //使能中断
PWMA_CR1 |= 0x01; //开始计时
EA = 1; //打开总中断
while (1)
{
}
}
/******************** 中断函数 **************************/
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); //设置占空比时间
PWMA_CCR1L = (u8)(PWM1_Duty);
}
PWMA_SR1 = 0;
}
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