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芯片:STM32G0311: 描述使用STM32G031给客户做假产品,在使用ADC时,采集的数值一直为0的情况。给大家 使用STM32CubeMX开发代码。配置ADC,PB0为ADC1_8,PA11[PA9]为ADC1_15. 生成代码如下: int main(void) { HAL_Init(); SystemClock_Config(); MX_DMA_Init(); MX_ADC1_Init(); MX_NVIC_Init(); HAL_ADCEx_Calibration_Start(&hadc1); HAL_ADC_Start_DMA(&hadc1,(uint32_t *)&adcbuf,2); while (1) { if(get_sys_time_us() % 1000 == 0) { printf("adc1 = %drn", adcbuf[0]); printf("adc1 = %drn", adcbuf[1]); } } ADC_HandleTypeDef hadc1; DMA_HandleTypeDef hdma_adc1; /* ADC1 init function */ void MX_ADC1_Init(void) { ADC_AnalogWDGConfTypeDef AnalogWDGConfig = {0}; ADC_ChannelConfTypeDef sConfig = {0}; /** 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.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_160CYCLES_5; hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_160CYCLES_5; hadc1.Init.OversamplingMode = DISABLE; hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH; if (HAL_ADC_Init(&hadc1) != HAL_OK) { Error_Handler(); } /** Configure Analog WatchDog 2 */ AnalogWDGConfig.WatchdogMode = ADC_ANALOGWATCHDOG_SINGLE_REG; if (HAL_ADC_AnalogWDGConfig(&hadc1, &AnalogWDGConfig) != HAL_OK) { Error_Handler(); } /** Configure Regular Channel */ sConfig.Channel = ADC_CHANNEL_15; 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(); } } 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_ADC_CLK_ENABLE(); __HAL_RCC_GPIOB_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); /**ADC1 GPIO Configuration PB0 ------> ADC1_IN8 PA11 [PA9] ------> ADC1_IN15 */ GPIO_InitStruct.Pin = GPIO_PIN_0; GPIO_InitStruct.Mode = GPIO_MODE_ANALOG; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); GPIO_InitStruct.Pin = GPIO_PIN_11; 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 = DMA1_Channel1; hdma_adc1.Init.Request = DMA_REQUEST_ADC1; 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_HALFWORD; hdma_adc1.Init.Mode = DMA_CIRCULAR; hdma_adc1.Init.Priority = DMA_PRIORITY_HIGH; 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 */ } } 把STM32CubeMX生成的代码下载到芯片中运行,结果ADC1_8的值可以读到,但是ADC1_15的值却一直为0。 出现上述问题的原因是因为STM32G031的ADC序列器配置成完全可配置时,使用只能通 道0-14,不能使用通道15,16,17,18;所以在有使用到通道15,16,17 ,18 的情况下,ADC 序列 器要配置成不完全可配置。 Sequencer 选项选择为:Sequencer not fully configured 如果是多通道则不连续转换模式要使能。 |
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