怎么编程输出三角波

时间:2025-01-27 02:13:07 网络游戏

1. C语言实现

使用定时器和DAC

```c

include "stm32f10x_tim.h"

include "stm32f10x_dac.h"

define SAMPLE_RATE 10000 // 采样率10kHz=10000Hz

define UP_TIME 0.5 // 上升时间比周期

void TriangleWave_GPIO_Init(void) {

GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA, &GPIO_InitStructure);

}

void TriangleWave_Init(void) {

DAC_InitTypeDef DAC_InitStructure;

DAC_Cmd(DAC_Channel_1, ENABLE);

DAC_Cmd(DAC_Channel_2, ENABLE);

DAC_SetDualChannelData(DAC_Align_12b_R, 0x00, 0x00); // 设置波谷为0

DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_Triangle;

DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_4095;

DAC_Init(DAC_Channel_1, &DAC_InitStructure);

DAC_Init(DAC_Channel_2, &DAC_InitStructure);

}

void TriangleWave_Update(void) {

static uint16_t counter = 0;

static uint16_t value1 = 0;

static uint16_t value2 = 0;

counter++;

if (counter % SAMPLE_RATE < (SAMPLE_RATE * UP_TIME)) {

value1 = counter * 4095 / SAMPLE_RATE;

} else {

value1 = 4095 - (counter - SAMPLE_RATE * UP_TIME) * 4095 / SAMPLE_RATE;

}

if (counter % SAMPLE_RATE < (SAMPLE_RATE * (1 - UP_TIME))) {

value2 = counter * 4095 / SAMPLE_RATE;

} else {

value2 = 4095 - (counter - SAMPLE_RATE * (1 - UP_TIME)) * 4095 / SAMPLE_RATE;

}

DAC_SetDualChannelData(DAC_Align_12b_R, value1, value2);

}

int main(void) {

TriangleWave_GPIO_Init();

TriangleWave_Init();

while (1) {

TriangleWave_Update();

}

return 0;

}

```

2. Verilog实现

使用FPGA的DAC模块