i.MX Processors中的主题 Re: ECSPI using SDMA for cortex M4 can not recive data

ECSPI using SDMA for cortex M4 can not recive data

JanChiang — Tue, 15 Jun 2021 12:05:41 GMT

Hi ，

I have a strange problem. I use SDMA to control the SPI according to the example ecspi_polling_master. Finally, I can get the correct data(tx and rx) on the oscilloscope, but the data from the ecspi_receiveData interface is always 0(rx).

The ECSPI Control Register is 0xF0B211, The Config Register is 0x100011

Re: ECSPI using SDMA for cortex M4 can not recive data

igorpadykov — Wed, 16 Jun 2021 01:05:50 GMT

Hi Jan

I believe for sdma "polling" should not be used, for m4 ecspi sdma example one can look at

Windows Installer: MCUXpresso SDK2.2 for i.MX 6ULL

Best regards
igor

Re: ECSPI using SDMA for cortex M4 can not recive data

JanChiang — Wed, 16 Jun 2021 02:54:21 GMT

Hi igor:

thanks your reply, But our platform and the files you provided look very different, the interface mentioned in your files can not be found in our code

Re: ECSPI using SDMA for cortex M4 can not recive data

JanChiang — Wed, 16 Jun 2021 03:01:32 GMT

and here is the ecspi api for our platform

Re: ECSPI using SDMA for cortex M4 can not recive data

igorpadykov — Wed, 23 Jun 2021 01:10:13 GMT

right, in your release such examples are not available, you can use them just as reference for

creating own.

Best regards
igor