RT1024 SPI DMA问题

[Geass]

你好：

  我使用RT1024的SPI1 和SPI2 以DAM的方式周期性发送数据，当我调用LPSPI_MasterTransferEDMA（）函数后发现，SPI需要十几us的延迟才会还是传输，而且调用发送函数后SPI启动发送的延迟时间是不定的，有时是十几us有时是二十几us，程序中没有其它地方使用SPI，循环调用SPI的频率大概是10Khz,我想问一下怎样才能快速启动SPI传输（调用LPSPI_MasterTransferEDMA（）函数后SPI立即启动传输），还有SPI1和SPI2通过DMA模式是否可以同步传输。

[jeremyzhou]

Hi,
非常感谢使用NXP产品，很高兴为你提供技术支持！
请上传一下完整的测试代码。
Have a great day,
TIC

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------