Stm32h7 Hal library SPI DMA transmission has been in busy solution

One . brief introduction

In the use of smt32H7 Of hal When I was in the library , Use alone spi It's OK when , But add DMA After that , Can send data once , Then its state is always BUSY 了 . Baidu hasn't solved it for a long time , Finally, a solution was found .

Two . terms of settlement

call DMA After sending data , call HAL_SPI_Abort Function （ Appropriately add a little delay ）.
The specific situation is not clear . It is estimated that HAL One of the libraries. bug Well .