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bug report: problem with 4 Channel output compare mode of TIM2

Question asked by qizhang.chen on Dec 20, 2013
Latest reply on Dec 20, 2013 by qizhang.chen
I used STM32F407 to generate pulse output in 4 channel of TIM2 , these 4 channels are configured in output compare mode and toggle mode, which compare value are DMA transfered. Every channel works fine when working indepently, but the 4th channel output becomes bad when these 4 channels work simultaneously. 

In my project, every channel have 4 compare value in one timer period, it seems 4th channel DMA only transferred 2 value for comparision.

Does any have ideas?  Thanks a lot! st_IMG_20131220_103500.jpg