119 lines
4.7 KiB
C
119 lines
4.7 KiB
C
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#include "./SYSTEM/adc/adc.h"
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#include "./SYSTEM/delay/delay.h"
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ADC_HandleTypeDef hadc3;
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/* ADC3 初始化函数 */
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void MX_ADC3_Init(void){
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ADC_ChannelConfTypeDef sConfig = {0};
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/** 配置 ADC 的全局特性（时钟，分辨率，数据对齐和转换数量）
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*/
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hadc3.Instance = ADC3; //ADC3
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hadc3.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4; //4分频
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hadc3.Init.Resolution = ADC_RESOLUTION_8B; //8位精度
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hadc3.Init.ScanConvMode = DISABLE; //禁用扫描模式
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hadc3.Init.ContinuousConvMode = DISABLE; //关闭连续转换
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hadc3.Init.DiscontinuousConvMode = DISABLE; //禁用不连续转换模式
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hadc3.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; //不使用外部触发
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hadc3.Init.ExternalTrigConv = ADC_SOFTWARE_START; //软件触发
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hadc3.Init.DataAlign = ADC_DATAALIGN_RIGHT; //右对齐
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hadc3.Init.NbrOfConversion = 1; //1个转换在规则序列中 也就是只转换规则序列1
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hadc3.Init.DMAContinuousRequests = DISABLE; //禁用DMA
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hadc3.Init.EOCSelection = ADC_EOC_SINGLE_CONV; //单次转换模式
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HAL_ADC_Init(&hadc3);
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}
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/**
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* @brief ADC底层驱动，引脚配置，时钟使能
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此函数会被HAL_ADC_Init()调用
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* @param hadc:ADC句柄
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* @retval 无
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*/
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void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
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{
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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if(adcHandle->Instance==ADC3)
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{
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/* 使能 ADC3 时钟 */
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__HAL_RCC_ADC3_CLK_ENABLE();
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__HAL_RCC_GPIOF_CLK_ENABLE();
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/** ADC3 GPIO 配置
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PF3 ------> ADC3_IN9
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PF4 ------> ADC3_IN14
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*/
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GPIO_InitStruct.Pin = Offline_Detection1_Pin|Offline_Detection2_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
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}
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}
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/**
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* @brief 设置ADC通道采样时间
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* @param adcx : adc句柄指针,ADC_HandleTypeDef
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* @param ch : 通道号, ADC_CHANNEL_0~ADC_CHANNEL_17
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* @param stime: 采样时间 0~7, 对应关系为:
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* @arg ADC_SAMPLETIME_3CYCLES, 3个ADC时钟周期 ADC_SAMPLETIME_15CYCLES, 15个ADC时钟周期
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* @arg ADC_SAMPLETIME_28CYCLES, 28个ADC时钟周期 ADC_SAMPLETIME_56CYCLES, 56个ADC时钟周期
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* @arg ADC_SAMPLETIME_84CYCLES, 84个ADC时钟周期 ADC_SAMPLETIME_112CYCLES,112个ADC时钟周期
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* @arg ADC_SAMPLETIME_144CYCLES,144个ADC时钟周期 ADC_SAMPLETIME_480CYCLES,480个ADC时钟周期
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* @param rank: 多通道采集时需要设置的采集编号,
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假设你定义channel1的rank=1，channel2的rank=2，
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那么对应你在DMA缓存空间的变量数组AdcDMA[0] 就i是channel1的转换结果，AdcDMA[1]就是通道2的转换结果。
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单通道DMA设置为 ADC_REGULAR_RANK_1
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* @arg 编号1~16：ADC_REGULAR_RANK_1~ADC_REGULAR_RANK_16
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* @retval 无
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*/
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void adc_channel_set(ADC_HandleTypeDef *adc_handle, uint32_t ch, uint32_t rank, uint32_t stime)
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{
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/* 配置对应ADC通道 */
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ADC_ChannelConfTypeDef adc_channel;
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adc_channel.Channel = ch; /* 设置ADCX对通道ch */
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adc_channel.Rank = rank; /* 设置采样序列 */
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adc_channel.SamplingTime = stime; /* 设置采样时间 */
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HAL_ADC_ConfigChannel( adc_handle, &adc_channel);
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}
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/**
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* @brief 获得ADC转换后的结果
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* @param ch: 通道值 0~17，取值范围为：ADC_CHANNEL_0~ADC_CHANNEL_17
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* @retval 无
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*/
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uint32_t adc_get_result(uint32_t ch)
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{
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adc_channel_set(&hadc3, ch, 1, ADC_SAMPLETIME_480CYCLES); /* 设置通道，序列和采样时间 */
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HAL_ADC_Start(&hadc3); /* 开启ADC */
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HAL_ADC_PollForConversion(&hadc3, 10); /* 轮询转换 */
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return (uint16_t)HAL_ADC_GetValue(&hadc3); /* 返回最近一次ADC1规则组的转换结果 */
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}
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/**
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* @brief 获取通道ch的转换值，取times次, 然后平均
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* @param ch : 通道号, 0~17
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* @param times : 获取次数
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* @retval 通道ch的times次转换结果平均值
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*/
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uint32_t adc_get_result_average(uint32_t ch, uint8_t times)
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{
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uint32_t temp_val = 0;
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uint8_t t;
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for (t = 0; t < times; t++) /* 获取times次数据 */
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{
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temp_val += adc_get_result(ch);
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delay_ms(5);
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}
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return temp_val / times; /* 返回平均值 */
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}
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