STM32F405 TIM DMA work only once

[phonght32]

Hi ST team,

I'm implementing DShot protocol with Timer + DMA. I use 4 PWM channels to generate control signals for ESC. 

Timer and DMA's parameters are same for all PWM channel. But PA3 (TIM2_CH4) does not work the same as other PWM channels. It only transmit DMA buffer once.

Below is my configuration:

Auto reload value is 560, and this dma buffer will be transfered to pwm compare registers:

I use these function to start transfer data:

Could you please help me check this issue? 

Thank you very much.

[TDK]

Do the HAL functions return HAL_OK? Set TIM2 IRQ and its DMA to higher priority than the others. Does it work then?