msp430f5529生成50hz正弦波代码

以下是使用MSP430F5529生成50Hz正弦波的示例代码：

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

#define PI 3.14159265
#define BUFFER_SIZE 100

volatile int 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 pin
    P6SEL |= BIT6;

    // Configure DAC12
    DAC12_0CTL = DAC12IR + DAC12AMP_5 + DAC12ENC;
    DAC12_0DAT = 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 main(void) {
    WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer

    setupTimer();
    setupDAC();

    __bis_SR_register(GIE); // Enable global interrupts

    while (1) {
        generateSinWave();
    }
}

#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A(void) {
    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50Hz正弦波。在`generateSinWave`函数中，通过计算当前时间和正弦函数来生成DAC输出的值。定时器中断每20,000个周期触发一次，用于更新计数器和调用`generateSinWave`函数。最后，在主循环中不断生成正弦波形。

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。