Проблема казалось бы на ровном месте. Не хотят работать 2 потока DMA от 1 источника TIM1_CC1. Параметры одинаковые, адреса разные.

DMA_InitTypeDef	 DMA_InitStructure;

// Enable ADC3, DMA2 and GPIO clocks **************************************
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);

// Сохранение TIM1->CCR1 в память по событию захвата TIM1_СС1 || DMA ch6 str1
DMA_InitStructure.DMA_Channel = DMA_Channel_6;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) &(TIM1->CCR1);
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&CCR1mem;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
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_FIFOMode = DMA_FIFOMode_Disable;	
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;

DMA_Init(DMA2_Stream1, &DMA_InitStructure);
DMA_Cmd(DMA2_Stream1, ENABLE);

// Сохранение TIM4->CNT в память по событию захвата TIM1_СС1 || DMA ch6 str3 при тех же параметрах
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) &(TIM4->CNT);
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t) &CNT4mem;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
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_FIFOMode = DMA_FIFOMode_Disable;	
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;

DMA_Init(DMA2_Stream6, &DMA_InitStructure);
DMA_Cmd(DMA2_Stream6, ENABLE);
/**/

TIM_DMAConfig (TIM1, TIM_DMABase_CCR1, TIM_DMABurstLength_1Transfer);
TIM_DMACmd (TIM1, TIM_DMA_CC1, ENABLE);

Если строку

DMA_Cmd(DMA2_Stream6, ENABLE);

закомментировать 1 половина работает нормально. Аналогично если наоборот - не включать Stream1.

Это ограничение контроллера или тут какой-то финт нужно сделать?
Раздел: STM32