stm32f103zet6三角波
时间: 2024-01-25 19:03:21 浏览: 37
基于引用[1]和引用,我可以为您介绍一下如何在STM32F103ZET6上生成三角波。
方法1:使用DAC输出三角波
```c
#include "stm32f10x.h"
void DAC_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
DAC_InitTypeDef DAC_InitStructure;
// 使能GPIOA时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
// 使能DAC时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
// 配置PA4为模拟输出
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// 配置DAC通道1
DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_4095;
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
DAC_Init(DAC_Channel_1, &DAC_InitStructure);
// 使能DAC通道1
DAC_Cmd(DAC_Channel_1, ENABLE);
}
void DAC_GenerateTriangleWave(void)
{
uint16_t i;
for (i = 0; i < 4096; i++)
{
// 设置DAC通道1的输出值
DAC_SetChannel1Data(DAC_Align_12b_R, i);
// 等待一段时间,控制三角波的频率
delay_us(10);
}
}
int main(void)
{
// 初始化DAC
DAC_Init();
while (1)
{
// 生成三角波
DAC_GenerateTriangleWave();
}
}
```
方法2:使用PWM输出三角波
```c
#include "stm32f10x.h"
void TIM3_PWM_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
// 使能GPIOA时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
// 使能TIM3时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
// 配置PA6为复用推挽输出
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// 配置TIM3的时基
TIM_TimeBaseStructure.TIM_Period = 4095; // 设置周期为4095,即PWM频率为72MHz/4096 ≈ 17.58kHz
TIM_TimeBaseStructure.TIM_Prescaler = 0; // 不分频
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
// 配置TIM3的PWM模式
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 2047; // 设置占空比为50%
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM3, &TIM_OCInitStructure);
// 使能TIM3的PWM输出
TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
// 启动TIM3
TIM_Cmd(TIM3, ENABLE);
}
int main(void)
{
// 初始化TIM3的PWM输出
TIM3_PWM_Init();
while (1)
{
// 程序主循环
}
}
```