STM32G030F6使用CubeMx配置DMA读取多通道ADC实验

2024-07-08 04:44| 来源: 网络整理| 查看: 265

1. 使用 CubeMx 创建 ADC 工程

打开 CubeMx 软件，选中我们此次使用的单片机型号 STM32G030F6P6 ，点击 StartProject.

先配置一下串口，用来打印相关信息配置串口

再来配置 ADC 配置ADC

配置DMA PS：DMA　需要要配置成循环模式，否则只填满一次缓存数组后就停止工作，需要重调用启动 DMA 的函数.

配置时钟在这里插入图片描述

ps:本实验使用内部高速时钟，未使用外部晶振，主频设置为最大的64MHZ.

配置工程相关选项在这里插入图片描述

配置完成后点击右上角 GENERATE CODE完成工程的创建

2. 编程 2.1 串口相关的代码因打印相关信息需要使用 printf ，需要包含 stdio.h 的头文件，且需要重新设 fputc 的函数 /* Includes ------------------------------------------------------------------*/ #include "main.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ #include "stdio.h" /* 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 ---------------------------------------------------------*/ ADC_HandleTypeDef hadc1; DMA_HandleTypeDef hdma_adc1; UART_HandleTypeDef huart1; /* USER CODE BEGIN PV */ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_DMA_Init(void); static void MX_ADC1_Init(void); static void MX_USART1_UART_Init(void); /* USER CODE BEGIN PFP */ /* USER CODE END PFP */ /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ __IO uint16_t adcCovValueBuff[30][2] = {0}; //存放ADC的值 2通道每个通道存放30个值，由DMA循环写入 uint16_t adcAverageBuff[2] = {0}; //对每个通道30个ADC值取平均值 #ifdef __GNUC_ #define PUTCHAR_PROTOTYPE int __io_putchar(int ch) #else #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f) #endif PUTCHAR_PROTOTYPE { HAL_UART_Transmit(&huart1, (uint8_t*)&ch, 1, 0xFFFF); return ch; } /* USER CODE END 0 */ 2.2 main 函数 /** * @brief The application entry point. * @retval int */ int main(void) { /* USER CODE BEGIN 1 */ float votage = 0; uint32_t sum = 0; /* 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_USART1_UART_Init(); /* USER CODE BEGIN 2 */ printf("stm32g030f6 adc demo...... \n"); HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adcCovValueBuff, 60); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while(1) { for(uint8_t i = 0; i sum += adcCovValueBuff[count][i]; } adcAverageBuff[i] = sum / 30; sum = 0; } printf("---------------------------------------- \n"); printf("ADC Channel01 Value:0x%04X \n", adcAverageBuff[0]); votage = (float) adcAverageBuff[0] / 4096 * (float)3.3; printf("ADC Channel01 Voltage:%f V \n", votage); printf("ADC Channel02 Value:0x%04X \n", adcAverageBuff[1]); votage = (float) adcAverageBuff[1] / 4096 * (float)3.3; printf("ADC Channel02 Voltage:%f V \n", votage); printf("---------------------------------------- \n"); HAL_Delay(1000); /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ } /* USER CODE END 3 */ } 2.3 外设的初始化函数

外设的初始化函数都是由 CubeMx 生成的，因为我们只用 DMA 搬运数据，未使用 DMA　的中断功能，故初始化　DMA　时可将中断配置函数注释。

/** * @brief ADC1 Initialization Function * @param None * @retval None */ static 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_DIV2; hadc1.Init.Resolution = ADC_RESOLUTION_12B; hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE; hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV; hadc1.Init.LowPowerAutoWait = DISABLE; hadc1.Init.LowPowerAutoPowerOff = DISABLE; hadc1.Init.ContinuousConvMode = ENABLE; hadc1.Init.NbrOfConversion = 2; hadc1.Init.DiscontinuousConvMode = DISABLE; hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START; hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; hadc1.Init.DMAContinuousRequests = ENABLE; hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED; hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_12CYCLES_5; hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_12CYCLES_5; hadc1.Init.OversamplingMode = DISABLE; hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH; if(HAL_ADC_Init(&hadc1) != HAL_OK) { Error_Handler(); } /** Configure Regular Channel */ sConfig.Channel = ADC_CHANNEL_7; sConfig.Rank = ADC_REGULAR_RANK_1; sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_1; if(HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } /** Configure Regular Channel */ sConfig.Channel = ADC_CHANNEL_8; sConfig.Rank = ADC_REGULAR_RANK_2; sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_2; if(HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN ADC1_Init 2 */ /* USER CODE END ADC1_Init 2 */ } /** * @brief USART1 Initialization Function * @param None * @retval None */ static void MX_USART1_UART_Init(void) { /* USER CODE BEGIN USART1_Init 0 */ /* USER CODE END USART1_Init 0 */ /* USER CODE BEGIN USART1_Init 1 */ /* USER CODE END USART1_Init 1 */ huart1.Instance = USART1; huart1.Init.BaudRate = 115200; huart1.Init.WordLength = UART_WORDLENGTH_8B; huart1.Init.StopBits = UART_STOPBITS_1; huart1.Init.Parity = UART_PARITY_NONE; huart1.Init.Mode = UART_MODE_TX_RX; huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE; huart1.Init.OverSampling = UART_OVERSAMPLING_16; huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE; huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1; huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT; if(HAL_UART_Init(&huart1) != HAL_OK) { Error_Handler(); } if(HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK) { Error_Handler(); } if(HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK) { Error_Handler(); } if(HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN USART1_Init 2 */ /* USER CODE END USART1_Init 2 */ } /** * Enable DMA controller clock */ static void MX_DMA_Init(void) { /* DMA controller clock enable */ __HAL_RCC_DMA1_CLK_ENABLE(); /* DMA interrupt init */ /* DMA1_Channel1_IRQn interrupt configuration */ //HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);　//未使用中断功能，故注释　 //HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn); } /** * @brief GPIO Initialization Function * @param None * @retval None */ static void MX_GPIO_Init(void) { /* GPIO Ports Clock Enable */ __HAL_RCC_GPIOB_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); } 3. 实验现象

编译并将程序下载到开发板中,连接串口助手并打开；实验现象：每秒打印一次当前两个通道的　ADC　值及换算后的电压.

4.完整工程

如果您需要完成的工程，可点击此处下载 STM32G030F6使用CubeMx配置DMA读取多通道ADC实验

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