stm32f429t6, the uart8 dma rx function works on 3 out of 5 boards and does not work on 2
In stm32f429t6, the uart8 dma rx function works on 3 out of 5 boards and does not work on 2. The same firmware was applied to 5 boards, and if only the uart8 interrupt was used without using dma, the 5 boards mode operated normally. What is the cause...