基于c51的spwm逆变器程序

以下是基于C51的SPWM逆变器程序的示例代码：

#include <reg51.h>

// 定义时钟频率
#define FOSC 11059200L
#define BAUD 9600
#define TIMER_1 50000

// 定义GPIO引脚
sbit Ir1 = P2^2;
sbit Ir2 = P2^3;
sbit Ir3 = P2^4;
sbit Ir4 = P2^5;
sbit Ir5 = P2^6;
sbit Ir6 = P2^7;

// 定义变量
unsigned int counter = 0;
unsigned int counter1 = 0;
unsigned int counter2 = 0;

// 定义数组
unsigned char code sin_table[64] = { 128, 131, 134, 137, 140, 143, 146, 149, 152, 155, 158, 162, 165, 168, 171, 174, 177, 180, 183, 186, 189, 192, 195, 198, 201, 204, 207, 210, 213, 216, 218, 221, 224, 227, 230, 232, 235, 238, 240, 243, 246, 248, 251, 253, 255, 258, 260, 262, 264, 266, 268, 270, 272, 274, 275, 277, 279, 280, 281, 283, 284, 285, 286, 287, 288, 288 };

// 定义函数
void delay(unsigned int i);
void timer1_init(void);
void uart_init(void);
void uart_send(unsigned char dat);
void spwm_output(unsigned char duty_cycle);
void spwm_interrupt(void) interrupt 3;

void main(void)
{
    // 初始化定时器1
    timer1_init();
    
    // 初始化串口
    uart_init();
    
    // 循环输出SPWM波形
    while (1) {
        spwm_output(50);  // 占空比50%
        delay(1000);
        spwm_output(75);  // 占空比75%
        delay(1000);
        spwm_output(100); // 占空比100%
        delay(1000);
    }
}

// 延时函数
void delay(unsigned int i)
{
    while (i--);
}

// 定时器1初始化函数
void timer1_init(void)
{
    TMOD |= 0x10;   // 定时器1工作在方式1
    TH1 = (65536 - (FOSC / 12 / TIMER_1));  // 定时器1初值
    TL1 = (65536 - (FOSC / 12 / TIMER_1));
    ET1 = 1;    // 使能定时器1中断
    EA = 1;     // 使能总中断
    TR1 = 1;    // 启动定时器1
}

// 串口初始化函数
void uart_init(void)
{
    SCON = 0x50;    // 串口方式1，8位数据位，可变波特率
    TMOD |= 0x20;   // 定时器1工作在方式2
    TH1 = TL1 = -(FOSC / 12 / 32 / BAUD);   // 波特率
    TR1 = 1;        // 启动定时器1
}

// 串口发送函数
void uart_send(unsigned char dat)
{
    SBUF = dat;     // 发送数据
    while (!TI);    // 等待发送完成
    TI = 0;         // 标志位清零
}

// SPWM输出函数
void spwm_output(unsigned char duty_cycle)
{
    unsigned char i;
    unsigned char phase_shift = 0;
    unsigned char angle;
    unsigned char sin_value;
    unsigned int time_period;
    time_period = (unsigned int)(TIMER_1 * 1000 / 12);
    phase_shift = 64 * duty_cycle / 100;
    for (i = 0; i < 64; i++) {
        angle = (i + phase_shift) % 64;
        sin_value = sin_table[angle];
        switch (sin_value) {
            case 128:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 131:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 134:
                Ir1 = 0; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 137:
                Ir1 = 0; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 1;
                break;
            case 140:
                Ir1 = 0; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 0;
                break;
            case 143:
                Ir1 = 0; Ir2 = 0; Ir3 = 0; Ir4 = 1; Ir5 = 1; Ir6 = 0;
                break;
            case 146:
                Ir1 = 0; Ir2 = 0; Ir3 = 0; Ir4 = 1; Ir5 = 0; Ir6 = 0;
                break;
            case 149:
                Ir1 = 0; Ir2 = 0; Ir3 = 1; Ir4 = 1; Ir5 = 0; Ir6 = 0;
                break;
            case 152:
                Ir1 = 0; Ir2 = 0; Ir3 = 1; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 155:
                Ir1 = 0; Ir2 = 1; Ir3 = 1; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 158:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 162:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 165:
                Ir1 = 1; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 168:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 171:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 1;
                break;
            case 174:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 0;
                break;
            case 177:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 1; Ir5 = 1; Ir6 = 0;
                break;
            case 180:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 1; Ir5 = 0; Ir6 = 0;
                break;
            case 183:
                Ir1 = 1; Ir2 = 0; Ir3 = 1; Ir4 = 1; Ir5 = 0; Ir6 = 0;
                break;
            case 186:
                Ir1 = 1; Ir2 = 0; Ir3 = 1; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 189:
                Ir1 = 1; Ir2 = 1; Ir3 = 1; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 192:
                Ir1 = 1; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 195:
                Ir1 = 1; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 198:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 201:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 1;
                break;
            case 204:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 0;
                break;
            case 207:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 1; Ir5 = 1; Ir6 = 0;
                break;
            case 210:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 1; Ir5 = 0; Ir6 = 0;
                break;
            case 213:
                Ir1 = 0; Ir2 = 1; Ir3 = 1; Ir4 = 1; Ir5 = 0; Ir6 = 0;
                break;
            case 216:
                Ir1 = 0; Ir2 = 1; Ir3 = 1; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 218:
                Ir1 = 1; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 221:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 224:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 227:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 1;
                break;
            case 230:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 0;
                break;
            case 232:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 1; Ir5 = 1; Ir6 = 0;
                break;
            case 235:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 1; Ir5 = 0; Ir6 = 0;
                break;
            case 238:
                Ir1 = 1; Ir2 = 0; Ir3 = 1; Ir4 = 1; Ir5 = 0; Ir6 = 0;
                break;
            case 240:
                Ir1 = 1; Ir2 = 0; Ir3 = 1; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 243:
                Ir1 = 1; Ir2 = 1; Ir3 = 1; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 246:
                Ir1 = 1; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 248:
                Ir1 = 1; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 251:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 253:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 1;
                break;
            case 255:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 0;
                break;
            case 258:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 1; Ir5 = 1; Ir6 = 0;
                break;
            case 260:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 1; Ir5 = 0; Ir6 = 0;
                break;
            case 262:
                Ir1 = 0; Ir2 = 1; Ir3 = 1; Ir4 = 1; Ir5 = 0; Ir6 = 0;
                break;
            case 264:
                Ir1 = 0; Ir2 = 1; Ir3 = 1; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 266:
                Ir1 = 1; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 268:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 270:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 272:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 1;
                break;
            case 274:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 0;
                break;
            case 275:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 1; Ir5 = 1; Ir6 = 0;
                break;
            case 277:
                Ir1 = 1; Ir2 = 0; Ir3 = 0; Ir4 = 1; Ir5 = 0; Ir6 = 0;
                break;
            case 279:
                Ir1 = 1; Ir2 = 0; Ir3 = 1; Ir4 = 1; Ir5 = 0; Ir6 = 0;
                break;
            case 280:
                Ir1 = 1; Ir2 = 0; Ir3 = 1; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 281:
                Ir1 = 1; Ir2 = 1; Ir3 = 1; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 283:
                Ir1 = 1; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 0;
                break;
            case 284:
                Ir1 = 1; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 285:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 0; Ir6 = 1;
                break;
            case 286:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 1;
                break;
            case 287:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 0; Ir5 = 1; Ir6 = 0;
                break;
            case 288:
            default:
                Ir1 = 0; Ir2 = 1; Ir3 = 0; Ir4 = 1; Ir5 = 1; Ir6 = 0;
                break;
        }
        delay(time_period);
    }
}

// SPWM中断函数
void spwm_interrupt(void) interrupt 3
{
    TH1 = TL1 = -(FOSC / 12 / BAUD);
    counter++;
    if (counter == 200) {
        counter = 0;
        uart_send(counter1);
        counter1++;
        if (counter1 == 100) {
            counter1 = 0;
        }
    }
    counter2++;
    if (counter2 == 1000