STM32G030K6T6 使用HAL库 ADC DMA多通道采样数据为啥不正确？
了了一起.. 提问时间: 2023-08-11 10:55:24 / 未解决| ADC DMA多通道 进行采样时，获取到得数据与实际不一致，单通道时是对的 void MX_ADC1_Init(void) { 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_DIV2; hadc1.Init.Resolution = ADC_RESOLUTION_12B; hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE; hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV; hadc1.Init.LowPowerAutoWait = DISABLE; hadc1.Init.LowPowerAutoPowerOff = DISABLE; hadc1.Init.ContinuousConvMode = ENABLE; hadc1.Init.NbrOfConversion = 12; 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_39CYCLES_5; hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_39CYCLES_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_0; sConfig.Rank = 0; sConfig.SamplingTime = ADC_SAMPLETIME_39CYCLES_5; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } sConfig.Channel = ADC_CHANNEL_1; sConfig.Rank = 1; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } sConfig.Channel = ADC_CHANNEL_2; sConfig.Rank = 2; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } sConfig.Channel = ADC_CHANNEL_3; sConfig.Rank = 3; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } sConfig.Channel = ADC_CHANNEL_4; sConfig.Rank = 4; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } sConfig.Channel = ADC_CHANNEL_5; sConfig.Rank = 5; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } sConfig.Channel = ADC_CHANNEL_6; sConfig.Rank = 6; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } sConfig.Channel = ADC_CHANNEL_7; sConfig.Rank = 7; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } sConfig.Channel = ADC_CHANNEL_8; sConfig.Rank = 8; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } sConfig.Channel = ADC_CHANNEL_9; sConfig.Rank = 9; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } sConfig.Channel = ADC_CHANNEL_10; sConfig.Rank = 10; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } sConfig.Channel = ADC_CHANNEL_11; sConfig.Rank = 11; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } } void adc_Dma_start(void) { HAL_ADCEx_Calibration_Start(&hadc1); HAL_ADC_Start_DMA(&hadc1,(uint32_t *)&adcBuff,12); } |
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2个回答
- xmshao 回答时间: 2023-08-11 11:17:55
参考下相关话题 STM32G0系列ADC扫描序列模式解读 (qq.com)
- xmshao 回答时间: 2023-08-11 11:36:02
关于G0系列的ADC，你要注意下有两种采集序列的选择问题，如果你选择了 Sequencer set of fully configurable, 此时最多支持8个通道，而且这8个通道还只能在CH0~CH14间选择。如果你希望转换的通道超过8个，请选择 not fully configurable模式。下面链接文字可以阅读下，重点介绍了该话题，ADC结果数据也是基于DMA提取的。 参考资料。