我需要实现软件触发多通道 ADC 扫描，由 10ms 定时器中断回调驱动采集；DMA 时序无法精准控制，因此不能用 DMA。
以前纯 CMSIS 寄存器写法从没出过问题，但 HAL 库调试出现问题。
硬件初始化逻辑理论上没问题：调度器启动前有一段 while 循环测试，连续跑 10 次采样数值全部正常。一旦放到定时器中断回调里执行，程序直接卡死、触发硬件异常 Fault。
void MX_ADC1_Init(void)
{
ADC_MultiModeTypeDef multimode = {0};
ADC_ChannelConfTypeDef sConfig = {0};
/** Common config */
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_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.ContinuousConvMode = DISABLE;
hadc1.Init.NbrOfConversion = 2;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc1.Init.DMAContinuousRequests = DISABLE;
hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
hadc1.Init.OversamplingMode = DISABLE;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure the ADC multi-mode */
multimode.Mode = ADC_MODE_INDEPENDENT;
if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel */
sConfig.Channel = ADC_CHANNEL_13;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_47CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel */
sConfig.Channel = ADC_CHANNEL_14;
sConfig.Rank = ADC_REGULAR_RANK_2;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
}
启动前初始化
MX_ADC1_Init();
HAL_ADCEx_Calibration_Start(&hadc1, ADC_SINGLE_ENDED);
10ms TIM2 中断回调内错误采集代码
{
HAL_ADC_Start(&hadc1);
HAL_ADC_PollForConversion(&hadc1, 50);
accumulator[TEMP] += HAL_ADC_GetValue(&hadc1);
HAL_ADC_PollForConversion(&hadc1, 50);
accumulator[VBAT] += HAL_ADC_GetValue(&hadc1);
HAL_ADC_Stop(&hadc1);
}
这套代码无法正常工作。请教故障在哪里？如果无法解决，我计划把板子 L4 芯片全部换成 F4，换回原生 CMSIS 寄存器开发。
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