MSP430F5529由50hz正弦和10000hz三角波生成SPWM波

要使用MSP430F5529生成SPWM（Sine Wave Pulse Width Modulation）波形，您可以结合50Hz正弦波和10,000Hz三角波。下面是一个示例代码：

#include <msp430.h>
#include <math.h>

#define PI 3.14159265
#define BUFFER_SIZE 100

volatile int sine_buffer[BUFFER_SIZE];
volatile int triangle_buffer[BUFFER_SIZE];
volatile int buffer_index = 0;
volatile int timer_count = 0;

void setupTimer() {
    TA0CCTL0 = CCIE; // Enable Timer A0 interrupt
    TA0CCR0 = 20000; // Set Timer A0 period (20,000 cycles for 50Hz)
    TA0CTL = TASSEL_2 + MC_1 + TACLR; // Use SMCLK, Up mode, Clear TAR
}

void setupDAC() {
    // Configure DAC output pins
    P6SEL |= BIT6 | BIT7;

    // Configure DAC12
    DAC12_0CTL = DAC12IR + DAC12AMP_5 + DAC12ENC;
    DAC12_0DAT = 0;

    DAC12_1CTL = DAC12IR + DAC12AMP_5 + DAC12ENC;
    DAC12_1DAT = 0;
}

void generateSinWave() {
    float amplitude = 2047.5; // Half of the DAC range (4095 / 2)
    float frequency = 50; // 50Hz
    float time_step = 1.0 / frequency;
    float time = timer_count * time_step;

    int sin_value = amplitude * sin(2 * PI * frequency * time) + amplitude;

    DAC12_0DAT = sin_value;
}

void generateTriangleWave() {
    float amplitude = 2047.5; // Half of the DAC range (4095 / 2)
    float frequency = 10000; // 10,000Hz
    float time_step = 1.0 / frequency;
    float time = timer_count * time_step;

    int triangle_value = amplitude * (2 * (time - floor(0.5 + time))) + amplitude;

    DAC12_1DAT = triangle_value;
}

void generateSPWMWave() {
    int spwm_value = (sine_buffer[buffer_index] > triangle_buffer[buffer_index]) ? 1 : 0;

    // Output SPWM value to a GPIO pin
    if (spwm_value) {
        P1OUT |= BIT0; // Set GPIO P1.0 high
    } else {
        P1OUT &= ~BIT0; // Set GPIO P1.0 low
    }

    buffer_index++;
    if (buffer_index >= BUFFER_SIZE) {
        buffer_index = 0;
    }
}

void main(void) {
    WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer

    setupTimer();
    setupDAC();

    // Configure GPIO P1.0 as output for SPWM waveform
    P1DIR |= BIT0;

    __bis_SR_register(GIE); // Enable global interrupts

    while (1) {
        generateSPWMWave();
    }
}

#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A(void) {
    generateSinWave();
    generateTriangleWave();

    timer_count++;
    if (timer_count >= BUFFER_SIZE) {
        timer_count = 0;
    }
}

这段代码使用了MSP430F5529的定时器和DAC模块来生成SPWM波形。在`generateSinWave`函数中，使用50Hz正弦波形生成DAC0的输出。在`generateTriangleWave`函数中，使用10,000Hz三角波形生成DAC1的输出。在`generateSPWMWave`函数中，将DAC0和DAC1的输出进行比较，根据结果设置GPIO P1.0的高低电平，从而生成SPWM波形。

请注意，这只是一个基本的示例代码，您可能需要根据您的具体需求进行修改和优化。还请确保正确配置MSP430F5529的时钟和引脚设置。