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STM32 ADC和DMA_stm32 adc dma
作者：盐析白兔 | 2024-05-14 00:54:04
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stm32 adc dma
STM32 ADC和DMA简单总结
1.简介
使用野火开发板F429IGT6
ADC框图
![[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-hcRJQP6A-1656898707918)(https://raw.githubusercontent.com/Master-4869/pictures/main/image-20220702105905661.png)]](https://img-blog.csdnimg.cn/26097e67f47241a49214bce8140a7247.png)
ADC主要的选项配置有
- 时钟的分频配置，这个决定了ADC的时钟速度，
- 采样时钟数量，采样的时间长一点会更准，整个一个采样的周期是采样时间加上转换时间，如果使用12位的就需要加上12个时钟的转换时间，这样3个采样时间加上12个转换时间，整个采样周期就是15个周期
- 数据对齐的方式为左对齐还是右对齐，因为数据寄存器的宽度是16位的，采样的精度只能12位
- 扫描模式是同一个ADC开启多个通道，是否要轮流转换每个通道
- 连续采样是ADC是否要一直采样转换还是触发一次就停止转换
- EOC是转换结束标志
- 可以配置ADC的触发是软件触发还是硬件触发
- rank可以配置各个通道的转换先后顺序
- ADC可以分为规则转换通道和注入转换通道，一般用的就是规则转换通道
ADC还可以配置为多重采样的模式，一共有3个ADC，可以轮流来采样转换同一个通道，这样在第一个ADC转换的时候第二个可以紧接着采样，可以提升ADC的采样率。
![[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-2GFsNAoN-1656898707918)(https://raw.githubusercontent.com/Master-4869/pictures/main/image-20220702111226199.png)]](https://img-blog.csdnimg.cn/d75366ef93014f9495549f099d2cfc92.png)
将3个ADC的相同通道选中，在ADC1的模式中选择三重采样。配置DMA以ADC1为主，其他ADC不需要配置，每个ADC都要打开循环检测模式。
DMA的配置主要有
- 数据传输的方向，分为存储器到存储器，外设到存储器，存储器到外设
- 传输的模式是循环传输还是只传输一次
- 传输数据的宽度
- 传输时外设寄存器的地址和存储器的地址要不要递增，注意每次递增的地址的大小是和设置的数据宽度相同的
如果使用FIFO的话可以设置突发模式等
2.代码
使用cubemx6.6.0
MDK5.34
2.1多通道DMA
/* USER CODE BEGIN Header */ /** ****************************************************************************** * @file adc.c * @brief This file provides code for the configuration * of the ADC instances. ****************************************************************************** * @attention * * Copyright (c) 2022 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include "adc.h" /* USER CODE BEGIN 0 */ /* USER CODE END 0 */ ADC_HandleTypeDef hadc1; DMA_HandleTypeDef hdma_adc1; /* ADC1 init function */ void MX_ADC1_Init(void) { /* USER CODE BEGIN ADC1_Init 0 */ /* USER CODE END ADC1_Init 0 */ ADC_ChannelConfTypeDef sConfig = {0}; /* USER CODE BEGIN ADC1_Init 1 */ /* USER CODE END ADC1_Init 1 */ /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) */ hadc1.Instance = ADC1; hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4; hadc1.Init.Resolution = ADC_RESOLUTION_12B; hadc1.Init.ScanConvMode = ENABLE; hadc1.Init.ContinuousConvMode = ENABLE; hadc1.Init.DiscontinuousConvMode = DISABLE; hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START; hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc1.Init.NbrOfConversion = 3; hadc1.Init.DMAContinuousRequests = ENABLE; hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV; if (HAL_ADC_Init(&hadc1) != HAL_OK) { Error_Handler(); } /** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. */ sConfig.Channel = ADC_CHANNEL_13; sConfig.Rank = 1; sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } /** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. */ sConfig.Channel = ADC_CHANNEL_4; sConfig.Rank = 2; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } /** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. */ sConfig.Channel = ADC_CHANNEL_6; sConfig.Rank = 3; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN ADC1_Init 2 */ /* USER CODE END ADC1_Init 2 */ } void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle) { GPIO_InitTypeDef GPIO_InitStruct = {0}; if(adcHandle->Instance==ADC1) { /* USER CODE BEGIN ADC1_MspInit 0 */ /* USER CODE END ADC1_MspInit 0 */ /* ADC1 clock enable */ __HAL_RCC_ADC1_CLK_ENABLE(); __HAL_RCC_GPIOC_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); /**ADC1 GPIO Configuration PC3 ------> ADC1_IN13 PA4 ------> ADC1_IN4 PA6 ------> ADC1_IN6 */ GPIO_InitStruct.Pin = GPIO_PIN_3; GPIO_InitStruct.Mode = GPIO_MODE_ANALOG; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(GPIOC, &GPIO_InitStruct); GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_6; GPIO_InitStruct.Mode = GPIO_MODE_ANALOG; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); /* ADC1 DMA Init */ /* ADC1 Init */ hdma_adc1.Instance = DMA2_Stream0; hdma_adc1.Init.Channel = DMA_CHANNEL_0; hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY; hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE; hdma_adc1.Init.MemInc = DMA_MINC_ENABLE; hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD; hdma_adc1.Init.Mode = DMA_CIRCULAR; hdma_adc1.Init.Priority = DMA_PRIORITY_LOW; hdma_adc1.Init.FIFOMode = DMA_FIFOMODE_DISABLE; if (HAL_DMA_Init(&hdma_adc1) != HAL_OK) { Error_Handler(); } __HAL_LINKDMA(adcHandle,DMA_Handle,hdma_adc1); /* USER CODE BEGIN ADC1_MspInit 1 */ /* USER CODE END ADC1_MspInit 1 */ } } void HAL_ADC_MspDeInit(ADC_HandleTypeDef* adcHandle) { if(adcHandle->Instance==ADC1) { /* USER CODE BEGIN ADC1_MspDeInit 0 */ /* USER CODE END ADC1_MspDeInit 0 */ /* Peripheral clock disable */ __HAL_RCC_ADC1_CLK_DISABLE(); /**ADC1 GPIO Configuration PC3 ------> ADC1_IN13 PA4 ------> ADC1_IN4 PA6 ------> ADC1_IN6 */ HAL_GPIO_DeInit(GPIOC, GPIO_PIN_3); HAL_GPIO_DeInit(GPIOA, GPIO_PIN_4|GPIO_PIN_6); /* ADC1 DMA DeInit */ HAL_DMA_DeInit(adcHandle->DMA_Handle); /* USER CODE BEGIN ADC1_MspDeInit 1 */ /* USER CODE END ADC1_MspDeInit 1 */ } } /* USER CODE BEGIN 1 */ //void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc) //{ // ADC_Value = HAL_ADC_GetValue(hadc); //} /* USER CODE END 1 */
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/* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2022 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include "main.h" #include "adc.h" #include "dma.h" #include "usart.h" #include "gpio.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ /* USER CODE END PD */ /* Private macro -------------------------------------------------------------*/ /* USER CODE BEGIN PM */ /* USER CODE END PM */ /* Private variables ---------------------------------------------------------*/ /* USER CODE BEGIN PV */ __IO uint16_t ADC_Value[300]; //extern UART_HandleTypeDef huart1; /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); /* USER CODE BEGIN PFP */ /* USER CODE END PFP */ /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ /* USER CODE END 0 */ /** * @brief The application entry point. * @retval int */ int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* USER CODE BEGIN Init */ uint32_t chanel_value[3] = {0}; /* USER CODE END Init */ /* Configure the system clock */ SystemClock_Config(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_DMA_Init(); MX_ADC1_Init(); MX_USART1_UART_Init(); /* USER CODE BEGIN 2 */ if (HAL_ADC_Start_DMA(&hadc1,(uint32_t *)&ADC_Value,300) == HAL_OK) { printf("dma开启成功\n\r"); } else printf("dma开启失败\n\r"); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { chanel_value[0] = 0; chanel_value[1] = 0; chanel_value[2] = 0; for(int i = 0;i<300;) { chanel_value[0] += ADC_Value[i++]; chanel_value[1] += ADC_Value[i++]; chanel_value[2] += ADC_Value[i++]; } chanel_value[0] = (float)chanel_value[0]/100; chanel_value[1] = (float)chanel_value[1]/100; chanel_value[2] = (float)chanel_value[2]/100; printf("\r\n------ ADC DMA ------\r\n\r\n"); printf(" AD1 value = %1.3fV \r\n", chanel_value[0]*3.3f/4096); printf(" AD2 value = %1.3fV \r\n", chanel_value[1]*3.3f/4096); printf(" AD3 value = %1.3fV \r\n", chanel_value[2]*3.3f/4096); HAL_Delay(100); /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ } /* USER CODE END 3 */ } /** * @brief System Clock Configuration * @retval None */ void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; /** Configure the main internal regulator output voltage */ __HAL_RCC_PWR_CLK_ENABLE(); __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); /** Initializes the RCC Oscillators according to the specified parameters * in the RCC_OscInitTypeDef structure. */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 15; RCC_OscInitStruct.PLL.PLLN = 216; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 4; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { Error_Handler(); } /** Activate the Over-Drive mode */ if (HAL_PWREx_EnableOverDrive() != HAL_OK) { Error_Handler(); } /** Initializes the CPU, AHB and APB buses clocks */ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { Error_Handler(); } } /* USER CODE BEGIN 4 */ /* USER CODE END 4 */ /** * @brief This function is executed in case of error occurrence. * @retval None */ void Error_Handler(void) { /* USER CODE BEGIN Error_Handler_Debug */ /* User can add his own implementation to report the HAL error return state */ __disable_irq(); while (1) { } /* USER CODE END Error_Handler_Debug */ } #ifdef USE_FULL_ASSERT /** * @brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * @param file: pointer to the source file name * @param line: assert_param error line source number * @retval None */ void assert_failed(uint8_t *file, uint32_t line) { /* USER CODE BEGIN 6 */ /* User can add his own implementation to report the file name and line number, ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ /* USER CODE END 6 */ } #endif /* USE_FULL_ASSERT */
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HAL_ADC_Start_DMA函数的作用就是启动ADC并且使用DMA传输数据。后面跟的数据长度要和自己设定的缓冲区长度一致，DMA会自动递增地址存放数据，递增设置的长度之后会自动复位地址重新开始从第一个地址写数据，覆盖掉之前的数据。
ADC规则通道只有一个数据寄存器， ADC_DR，在使能 DMA 模式的情况下（ADC_CR2 寄存器中的 DMA 位置 1），每完成规则通道组中的 一个通道转换后，都会生成一个 DMA 请求。这样便可将转换的数据从 ADC_DR 寄存器传输 到用软件选择的目标位置。
2.2三重ADC
/* USER CODE BEGIN Header */ /** ****************************************************************************** * @file adc.c * @brief This file provides code for the configuration * of the ADC instances. ****************************************************************************** * @attention * * Copyright (c) 2022 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include "adc.h" /* USER CODE BEGIN 0 */ /* USER CODE END 0 */ ADC_HandleTypeDef hadc1; ADC_HandleTypeDef hadc2; ADC_HandleTypeDef hadc3; DMA_HandleTypeDef hdma_adc1; /* ADC1 init function */ void MX_ADC1_Init(void) { /* USER CODE BEGIN ADC1_Init 0 */ /* USER CODE END ADC1_Init 0 */ ADC_MultiModeTypeDef multimode = {0}; ADC_ChannelConfTypeDef sConfig = {0}; /* USER CODE BEGIN ADC1_Init 1 */ /* USER CODE END ADC1_Init 1 */ /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) */ hadc1.Instance = ADC1; hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4; hadc1.Init.Resolution = ADC_RESOLUTION_12B; hadc1.Init.ScanConvMode = DISABLE; hadc1.Init.ContinuousConvMode = ENABLE; hadc1.Init.DiscontinuousConvMode = DISABLE; hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START; hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc1.Init.NbrOfConversion = 1; hadc1.Init.DMAContinuousRequests = ENABLE; hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV; if (HAL_ADC_Init(&hadc1) != HAL_OK) { Error_Handler(); } /** Configure the ADC multi-mode */ multimode.Mode = ADC_TRIPLEMODE_INTERL; multimode.DMAAccessMode = ADC_DMAACCESSMODE_2; multimode.TwoSamplingDelay = ADC_TWOSAMPLINGDELAY_5CYCLES; if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK) { Error_Handler(); } /** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. */ sConfig.Channel = ADC_CHANNEL_13; sConfig.Rank = 1; sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN ADC1_Init 2 */ /* USER CODE END ADC1_Init 2 */ } /* ADC2 init function */ void MX_ADC2_Init(void) { /* USER CODE BEGIN ADC2_Init 0 */ /* USER CODE END ADC2_Init 0 */ ADC_ChannelConfTypeDef sConfig = {0}; /* USER CODE BEGIN ADC2_Init 1 */ /* USER CODE END ADC2_Init 1 */ /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) */ hadc2.Instance = ADC2; hadc2.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4; hadc2.Init.Resolution = ADC_RESOLUTION_12B; hadc2.Init.ScanConvMode = DISABLE; hadc2.Init.ContinuousConvMode = ENABLE; hadc2.Init.DiscontinuousConvMode = DISABLE; hadc2.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc2.Init.NbrOfConversion = 1; hadc2.Init.DMAContinuousRequests = DISABLE; hadc2.Init.EOCSelection = ADC_EOC_SINGLE_CONV; if (HAL_ADC_Init(&hadc2) != HAL_OK) { Error_Handler(); } /** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. */ sConfig.Channel = ADC_CHANNEL_13; sConfig.Rank = 1; sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES; if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN ADC2_Init 2 */ /* USER CODE END ADC2_Init 2 */ } /* ADC3 init function */ void MX_ADC3_Init(void) { /* USER CODE BEGIN ADC3_Init 0 */ /* USER CODE END ADC3_Init 0 */ ADC_ChannelConfTypeDef sConfig = {0}; /* USER CODE BEGIN ADC3_Init 1 */ /* USER CODE END ADC3_Init 1 */ /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) */ hadc3.Instance = ADC3; hadc3.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4; hadc3.Init.Resolution = ADC_RESOLUTION_12B; hadc3.Init.ScanConvMode = DISABLE; hadc3.Init.ContinuousConvMode = ENABLE; hadc3.Init.DiscontinuousConvMode = DISABLE; hadc3.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc3.Init.NbrOfConversion = 1; hadc3.Init.DMAContinuousRequests = DISABLE; hadc3.Init.EOCSelection = ADC_EOC_SINGLE_CONV; if (HAL_ADC_Init(&hadc3) != HAL_OK) { Error_Handler(); } /** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. */ sConfig.Channel = ADC_CHANNEL_13; sConfig.Rank = 1; sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES; if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN ADC3_Init 2 */ /* USER CODE END ADC3_Init 2 */ } void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle) { GPIO_InitTypeDef GPIO_InitStruct = {0}; if(adcHandle->Instance==ADC1) { /* USER CODE BEGIN ADC1_MspInit 0 */ /* USER CODE END ADC1_MspInit 0 */ /* ADC1 clock enable */ __HAL_RCC_ADC1_CLK_ENABLE(); __HAL_RCC_GPIOC_CLK_ENABLE(); /**ADC1 GPIO Configuration PC3 ------> ADC1_IN13 */ GPIO_InitStruct.Pin = GPIO_PIN_3; GPIO_InitStruct.Mode = GPIO_MODE_ANALOG; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(GPIOC, &GPIO_InitStruct); /* ADC1 DMA Init */ /* ADC1 Init */ hdma_adc1.Instance = DMA2_Stream0; hdma_adc1.Init.Channel = DMA_CHANNEL_0; hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY; hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE; hdma_adc1.Init.MemInc = DMA_MINC_ENABLE; hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD; hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_WORD; hdma_adc1.Init.Mode = DMA_CIRCULAR; hdma_adc1.Init.Priority = DMA_PRIORITY_LOW; hdma_adc1.Init.FIFOMode = DMA_FIFOMODE_DISABLE; if (HAL_DMA_Init(&hdma_adc1) != HAL_OK) { Error_Handler(); } __HAL_LINKDMA(adcHandle,DMA_Handle,hdma_adc1); /* USER CODE BEGIN ADC1_MspInit 1 */ /* USER CODE END ADC1_MspInit 1 */ } else if(adcHandle->Instance==ADC2) { /* USER CODE BEGIN ADC2_MspInit 0 */ /* USER CODE END ADC2_MspInit 0 */ /* ADC2 clock enable */ __HAL_RCC_ADC2_CLK_ENABLE(); __HAL_RCC_GPIOC_CLK_ENABLE(); /**ADC2 GPIO Configuration PC3 ------> ADC2_IN13 */ GPIO_InitStruct.Pin = GPIO_PIN_3; GPIO_InitStruct.Mode = GPIO_MODE_ANALOG; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(GPIOC, &GPIO_InitStruct); /* USER CODE BEGIN ADC2_MspInit 1 */ /* USER CODE END ADC2_MspInit 1 */ } else if(adcHandle->Instance==ADC3) { /* USER CODE BEGIN ADC3_MspInit 0 */ /* USER CODE END ADC3_MspInit 0 */ /* ADC3 clock enable */ __HAL_RCC_ADC3_CLK_ENABLE(); __HAL_RCC_GPIOC_CLK_ENABLE(); /**ADC3 GPIO Configuration PC3 ------> ADC3_IN13 */ GPIO_InitStruct.Pin = GPIO_PIN_3; GPIO_InitStruct.Mode = GPIO_MODE_ANALOG; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(GPIOC, &GPIO_InitStruct); /* USER CODE BEGIN ADC3_MspInit 1 */ /* USER CODE END ADC3_MspInit 1 */ } } void HAL_ADC_MspDeInit(ADC_HandleTypeDef* adcHandle) { if(adcHandle->Instance==ADC1) { /* USER CODE BEGIN ADC1_MspDeInit 0 */ /* USER CODE END ADC1_MspDeInit 0 */ /* Peripheral clock disable */ __HAL_RCC_ADC1_CLK_DISABLE(); /**ADC1 GPIO Configuration PC3 ------> ADC1_IN13 */ HAL_GPIO_DeInit(GPIOC, GPIO_PIN_3); /* ADC1 DMA DeInit */ HAL_DMA_DeInit(adcHandle->DMA_Handle); /* USER CODE BEGIN ADC1_MspDeInit 1 */ /* USER CODE END ADC1_MspDeInit 1 */ } else if(adcHandle->Instance==ADC2) { /* USER CODE BEGIN ADC2_MspDeInit 0 */ /* USER CODE END ADC2_MspDeInit 0 */ /* Peripheral clock disable */ __HAL_RCC_ADC2_CLK_DISABLE(); /**ADC2 GPIO Configuration PC3 ------> ADC2_IN13 */ HAL_GPIO_DeInit(GPIOC, GPIO_PIN_3); /* USER CODE BEGIN ADC2_MspDeInit 1 */ /* USER CODE END ADC2_MspDeInit 1 */ } else if(adcHandle->Instance==ADC3) { /* USER CODE BEGIN ADC3_MspDeInit 0 */ /* USER CODE END ADC3_MspDeInit 0 */ /* Peripheral clock disable */ __HAL_RCC_ADC3_CLK_DISABLE(); /**ADC3 GPIO Configuration PC3 ------> ADC3_IN13 */ HAL_GPIO_DeInit(GPIOC, GPIO_PIN_3); /* USER CODE BEGIN ADC3_MspDeInit 1 */ /* USER CODE END ADC3_MspDeInit 1 */ } } /* USER CODE BEGIN 1 */ /* USER CODE END 1 */
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/* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2022 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include "main.h" #include "adc.h" #include "dma.h" #include "usart.h" #include "gpio.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ uint32_t adc_buffer[300] = {0}; /* USER CODE END PD */ /* Private macro -------------------------------------------------------------*/ /* USER CODE BEGIN PM */ /* USER CODE END PM */ /* Private variables ---------------------------------------------------------*/ /* USER CODE BEGIN PV */ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); /* USER CODE BEGIN PFP */ /* USER CODE END PFP */ /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ /* USER CODE END 0 */ /** * @brief The application entry point. * @retval int */ int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* USER CODE BEGIN Init */ /* USER CODE END Init */ /* Configure the system clock */ SystemClock_Config(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_DMA_Init(); MX_ADC1_Init(); MX_ADC2_Init(); MX_ADC3_Init(); MX_USART1_UART_Init(); /* USER CODE BEGIN 2 */ printf("\r\n------ ADC DMA ------\r\n\r\n"); HAL_ADC_Start(&hadc3); HAL_ADC_Start(&hadc2); HAL_ADCEx_MultiModeStart_DMA(&hadc1,adc_buffer,300); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ printf("\r\n------ ADC DMA ------\r\n\r\n"); printf(" AD1 value = %1.3fV \r\n", (uint16_t)adc_buffer[0]*3.3f/4096); printf(" AD1 value = %1.3fV \r\n", (adc_buffer[0]>>16)*3.3f/4096); printf(" AD1 value = %1.3fV \r\n", (uint16_t)adc_buffer[1]*3.3f/4096); printf(" AD1 value = %1.3fV \r\n", (adc_buffer[1]>>16)*3.3f/4096); HAL_Delay(100); /* USER CODE BEGIN 3 */ } /* USER CODE END 3 */ } /** * @brief System Clock Configuration * @retval None */ void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; /** Configure the main internal regulator output voltage */ __HAL_RCC_PWR_CLK_ENABLE(); __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); /** Initializes the RCC Oscillators according to the specified parameters * in the RCC_OscInitTypeDef structure. */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 15; RCC_OscInitStruct.PLL.PLLN = 216; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 4; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { Error_Handler(); } /** Activate the Over-Drive mode */ if (HAL_PWREx_EnableOverDrive() != HAL_OK) { Error_Handler(); } /** Initializes the CPU, AHB and APB buses clocks */ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { Error_Handler(); } } /* USER CODE BEGIN 4 */ /* USER CODE END 4 */ /** * @brief This function is executed in case of error occurrence. * @retval None */ void Error_Handler(void) { /* USER CODE BEGIN Error_Handler_Debug */ /* User can add his own implementation to report the HAL error return state */ __disable_irq(); while (1) { } /* USER CODE END Error_Handler_Debug */ } #ifdef USE_FULL_ASSERT /** * @brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * @param file: pointer to the source file name * @param line: assert_param error line source number * @retval None */ void assert_failed(uint8_t *file, uint32_t line) { /* USER CODE BEGIN 6 */ /* User can add his own implementation to report the file name and line number, ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ /* USER CODE END 6 */ } #endif /* USE_FULL_ASSERT */
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注意在启动ADC的时候要以下面的顺序开启，DMA是使用ADC1的
HAL_ADC_Start(&hadc3);
HAL_ADC_Start(&hadc2);
HAL_ADCEx_MultiModeStart_DMA(&hadc1,adc_buffer,300);
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在多重 ADC 模式下，可在多模式数据寄存器 (ADC_CDR) 中读取转换的数据。可在多模式状 态寄存器 (ADC_CSR) 中读取状态位
在三重 ADC 模式下，ADC 通用数据寄存器 (ADC_CDR) 包含 ADC1、ADC2 和 ADC3 的规则转换数据。 按照所选的存储顺序使用全部 32 个寄存器位。
在双重 ADC 模式下，ADC 通用数据寄存器 (ADC_CDR) 包含 ADC1 和 ADC2 的规则转换数据。使用全部 32 个寄存器位。
![[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-segkD2js-1656898707919)(https://raw.githubusercontent.com/Master-4869/pictures/main/image-20220702114556931.png)]](https://img-blog.csdnimg.cn/c1a70d41c55f4f3faccc914036fb5e06.png)
3.结果
多通道ADC
多重ADC
工程文件已上传。
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