TIM_DMAError with ErrorCode 1

[JBond.1]

Hi, I am trying to send WS2812 LED data as PWM signal using DMA. All works on STM32F091/STM32F103, but when I try to do it on STM32F407 sending via DMA fails.

My TIM1/DMA/NVIC settings:

 

I am trying to call:

HAL_TIM_PWM_Start_DMA(&htim1, TIM_CHANNEL_1, (uint32_t*)LedData, LED_DATA_LENGTH);

But I get calback to "TIM_DMAError" with "hdma->ErrorCode = 1" which means "HAL_DMA_ERROR_TE"?

What could be wrong?

[JBond.1]

It seems that the issue was in IRAM2 setting in my old project:

VS newly generated project:

New project works now. The question is now, why the old project had bad IRAM2 and why do I need IRAM2 setting at all?