/******************************************************************************** * @file :my_adc.c * @brief :对STM32 HAL 库中 ADC 的二次封装，提供 ADC 的所有操作接口 *******************************************************************************/ #include "onchip_conf.h" #ifdef ONCHIP_MY_ADC_ENABLED #define MAX_ADC_CHANNEL ADC_CHANNEL_9 /* Private Typedef -------------------------------------------------------------------*/ /* Private Functions Declare ----------------------------------------------------------*/ static int my_adc_init(uint32_t xChn); static int my_adc_get(uint32_t xChn, float* fVol); /* Private Variables -------------------------------------------------------------------*/ //参数定义: ADC单例模型，扩展到外部使用定义 const c_my_adc my_adc = {my_adc_init, my_adc_get}; //参数定义: ADC句柄 static ADC_HandleTypeDef ADC_Handle; //参数定义: ADC初始化状态 static bool _adc_init_state = false; static bool _adc_chn_init_state[10] = {false}; //参数定义: ADC配置参数，通道对应引脚定义 static const struct { uint32_t xChn; GPIO_TypeDef* GPIOx; uint16_t GPIO_Pin; } s_my_adc_cfg[] = { {ADC_CHANNEL_0, GPIOA, GPIO_PIN_0}, {ADC_CHANNEL_1, GPIOA, GPIO_PIN_1}, {ADC_CHANNEL_2, GPIOA, GPIO_PIN_2}, {ADC_CHANNEL_3, GPIOA, GPIO_PIN_3}, {ADC_CHANNEL_4, GPIOA, GPIO_PIN_4}, {ADC_CHANNEL_5, GPIOA, GPIO_PIN_5}, {ADC_CHANNEL_6, GPIOA, GPIO_PIN_6}, {ADC_CHANNEL_7, GPIOA, GPIO_PIN_7}, {ADC_CHANNEL_8, GPIOB, GPIO_PIN_0}, {ADC_CHANNEL_9, GPIOB, GPIO_PIN_1}, }; /* Private Functions -------------------------------------------------------------------*/ /** *@brief 设置初始化ADC通道的状态 */ static int my_adc_init(uint32_t xChn) { GPIO_InitTypeDef GPIO_Initure; /*参数检查*/ if(xChn > MAX_ADC_CHANNEL){ return R_PARAM; } /*初始化相应IO*/ GPIO_Initure.Pin = s_my_adc_cfg[xChn].GPIO_Pin; GPIO_Initure.Mode = GPIO_MODE_ANALOG; //模拟 GPIO_Initure.Pull = GPIO_NOPULL; //不带上下拉 HAL_GPIO_Init(s_my_adc_cfg[xChn].GPIOx,&GPIO_Initure); _adc_chn_init_state[xChn] = true; /*对应的通道标记为初始化成功*/ if(!_adc_init_state){ /*使能 ADC1 外设时钟*/ __HAL_RCC_ADC1_CLK_ENABLE(); /*ADC 时钟初始化*/ RCC_PeriphCLKInitTypeDef ADC_CLKInit; ADC_CLKInit.AdcClockSelection = RCC_ADCPCLK2_DIV6;//分频因子6时钟为72M/6=12MHz ADC_CLKInit.PeriphClockSelection = RCC_PERIPHCLK_ADC;//ADC外设时钟 HAL_RCCEx_PeriphCLKConfig(&ADC_CLKInit); /*ADC 外设初始化*/ ADC_Handle.Instance = ADC1; ADC_Handle.Init.DataAlign = ADC_DATAALIGN_RIGHT; //右对齐 ADC_Handle.Init.ScanConvMode = DISABLE; //非扫描模式 ADC_Handle.Init.ContinuousConvMode = DISABLE; //非连续转换（单次转换） ADC_Handle.Init.NbrOfConversion = 1; //1个转换在规则序列中 也就是只转换规则序列1 ADC_Handle.Init.DiscontinuousConvMode = DISABLE; //禁止不连续采样模式 ADC_Handle.Init.NbrOfDiscConversion = 0; //不连续采样通道数为0 ADC_Handle.Init.ExternalTrigConv = ADC_SOFTWARE_START; //软件触发 HAL_ADC_Init(&ADC_Handle); //初始化 HAL_ADCEx_Calibration_Start(&ADC_Handle); //校准ADC _adc_init_state = true; } return R_OK; } /** *@brief 设置初始化ADC通道的状态 */ static int my_adc_get(uint32_t xChn, float* fVol) { ADC_ChannelConfTypeDef ADC1_ChanConf; uint32_t xadc_val; float fadc_val; /*检查参数*/ if(NULL == fVol || xChn > MAX_ADC_CHANNEL){ return R_PARAM; } /*检查初始化状态*/ if(false == _adc_init_state || false == _adc_chn_init_state[xChn]){ return R_ERROR; } /*配置ADC*/ ADC1_ChanConf.Channel = xChn; //通道 ADC1_ChanConf.Rank = 1; //第1个序列，序列1 ADC1_ChanConf.SamplingTime = ADC_SAMPLETIME_239CYCLES_5; //采样时间 HAL_ADC_ConfigChannel(&ADC_Handle, &ADC1_ChanConf); //通道配置 HAL_ADC_Start(&ADC_Handle); //开启ADC HAL_ADC_PollForConversion(&ADC_Handle, 10); //轮询转换 xadc_val = HAL_ADC_GetValue(&ADC_Handle); fadc_val = xadc_val * (3.3f / 4096.0f); *fVol = fadc_val; return R_OK; } #endif /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ 帮我总结一下这串代码