topic Re: ECSPI transfer gets stuck after 3 bytes in i.MX Processors

ECSPI transfer gets stuck after 3 bytes

MBaer — Mon, 17 Jan 2022 09:36:32 GMT

Hello.

We are using the ECSPI2 in the i.mx8 m mini from the M4 core.

ECSPI2 is disabled in the device tree so that the M4 has full control.

The SPI is configured to transfer 5 bytes with the ECSPI_MasterTransferNonBlocking and then generate the RXFIFO Data Request Interrupt.

This works fine for some time but at some point the SPI Transfer hangs after sending 3 byte.

What could cause ECSPI to only transfer 3 byte?

Cheers Marcel

jimmychan — Fri, 21 Jan 2022 10:30:06 GMT

Which SDK are you using? Which board are you using?

Have you try other examples in the SDK and still have the issue?

MBaer — Tue, 25 Jan 2022 08:19:54 GMT

Hi Jimmy

We are using SDK 2.11.0 with a custom board using the i.MX8M Mini.

I could fix the original issue by using the CMSIS implementation of the ECSPI.

But there i face an other issue, that i cannot use ecspi2 and ecspi3 simultaneously.

I used the cmsis_ecspi_int_loopback_transfer as starting point and implemented ecspi 3 accordingly. I can use the ecspi3 alone but not both together.

Either the ECSPI2_DriverIRQHandler or the ECSPI3_DriverIRQHandler is not triggered.

MBaer — Wed, 26 Jan 2022 13:37:53 GMT

I added the NvicInit() and now it works on both spis.