ARM, RISC-V контроллеры

Чего то не получается реализовать запуск АЦП по таймеру совмесно с работой DMA. Когда ставлю в настройках АЦП ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConv_T15_TRGO; период опроса АЦП все равно остается равным 17 мкс, хотя период переполнения T15 равен 200 мкс. Вот кусок кода: void ADC1_INI(void) { ADC_InitTypeDef ADC_InitStructure; DMA_InitTypeDef DMA_InitStructure; /* ADC1 DeInit */ ADC_DeInit(ADC1); /* ADC1 Periph clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); /* DMA1 clock enable */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE); /* DMA1 Channel1 Config */ DMA_DeInit(DMA1_Channel1); DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address; DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RegularConvData_Tab; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_BufferSize = 3; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; DMA_InitStructure.DMA_Priority = DMA_Priority_High; DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_Init(DMA1_Channel1, &DMA_InitStructure); /* DMA1 Channel1 enable */ DMA_Cmd(DMA1_Channel1, ENABLE); /* ADC DMA request in circular mode */ ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular); /* Enable ADC_DMA */ ADC_DMACmd(ADC1, ENABLE); /* Initialize ADC structure */ ADC_StructInit(&ADC_InitStructure); /* Configure the ADC1 in continous mode withe a resolutuion equal to 12 bits */ ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; ADC_InitStructure.ADC_ContinuousConvMode = //DISABLE; ENABLE; ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None; // ADC_ExternalTrigConv_T15_TRGO; ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Backward; ADC_Init(ADC1, &ADC_InitStructure); /* Convert the ADC1 temperature sensor with 55.5 Cycles as sampling time */ ADC_ChannelConfig(ADC1, ADC_Channel_TempSensor , ADC_SampleTime_71_5Cycles); ADC_TempSensorCmd(ENABLE); /* Convert the ADC1 Vref with 55.5 Cycles as sampling time */ ADC_ChannelConfig(ADC1, ADC_Channel_Vrefint , ADC_SampleTime_71_5Cycles); ADC_VrefintCmd(ENABLE); ADC_ChannelConfig(ADC1, ADC_Channel_11 , ADC_SampleTime_71_5Cycles); /* ADC Calibration */ ADC_GetCalibrationFactor(ADC1); /* Enable ADC1 */ ADC_Cmd(ADC1, ENABLE); /* Wait the ADCEN falg */ while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN)); /* ADC1 regular Software Start Conv */ ADC_StartOfConversion(ADC1); }