stm32 adc采集到的数据 判断是三角波总代码

以下是一个简单的代码示例，可以用于判断ADC采集到的数据是否为三角波：

#include "stm32f4xx.h"

// 定义ADC采集的数据存储数组和数组大小
#define ADC_BUFFER_SIZE 1024
uint16_t adc_buffer[ADC_BUFFER_SIZE];

// 定义ADC的初始化函数
void ADC_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    ADC_InitTypeDef ADC_InitStructure;
    DMA_InitTypeDef DMA_InitStructure;

    // 使能GPIOA时钟
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
    // 使能DMA2时钟
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
    // 使能ADC1时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

    // 配置PA0为模拟输入
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置DMA
    DMA_InitStructure.DMA_Channel = DMA_Channel_0;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) &ADC1->DR;
    DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t) &adc_buffer;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
    DMA_InitStructure.DMA_BufferSize = ADC_BUFFER_SIZE;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
    DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
    DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
    DMA_Init(DMA2_Stream0, &DMA_InitStructure);

    // 配置ADC
    ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
    ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfConversion = 1;
    ADC_Init(ADC1, &ADC_InitStructure);

    // 配置ADC通道0
    ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_84Cycles);

    // 使能DMA
    ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
    DMA_Cmd(DMA2_Stream0, ENABLE);

    // 使能ADC
    ADC_Cmd(ADC1, ENABLE);

    // 启动ADC校准
    ADC_StartCalibration(ADC1);
    while (ADC_GetCalibrationStatus(ADC1) != RESET);

    // 启动ADC转换
    ADC_SoftwareStartConv(ADC1);
}

// 判断采集到的数据是否为三角波
bool IsTriangleWave(void)
{
    uint16_t i, j;
    uint16_t up_count = 0, down_count = 0;
    uint16_t up_slope, down_slope;

    // 统计上升沿和下降沿的数量
    for (i = 1; i < ADC_BUFFER_SIZE; i++) {
        if (adc_buffer[i] > adc_buffer[i-1]) {
            up_count++;
        } else if (adc_buffer[i] < adc_buffer[i-1]) {
            down_count++;
        }
    }

    // 如果上升沿和下降沿数量不相等，则不是三角波
    if (up_count != down_count) {
        return false;
    }

    // 计算上升沿和下降沿的平均斜率
    up_slope = 0;
    down_slope = 0;
    j = 0;
    for (i = 1; i < ADC_BUFFER_SIZE; i++) {
        if (adc_buffer[i] > adc_buffer[i-1]) {
            up_slope += adc_buffer[i] - adc_buffer[i-1];
            j++;
        } else if (adc_buffer[i] < adc_buffer[i-1]) {
            down_slope += adc_buffer[i-1] - adc_buffer[i];
            j++;
        }
    }
    if (j > 0) {
        up_slope /= j;
        down_slope /= j;
    }

    // 如果上升沿和下降沿的斜率相差较大，则不是三角波
    if (abs(up_slope - down_slope) > 100) {
        return false;
    }

    return true;
}

int main(void)
{
    // 初始化ADC
    ADC_Init();

    while (1) {
        // 判断采集到的数据是否为三角波
        if (IsTriangleWave()) {
            // 如果是三角波，则执行相应操作
            // ...
        }

        // 等待一定时间后重新开始采集
        Delay(10);
        ADC_SoftwareStartConv(ADC1);
    }
}

以上代码仅供参考，实际应用时需要根据具体情况进行适当修改。