An exception occurred when configuring flexio for SPI communication

[zenging]

HI, NXP
The version I used is S32DS 3.5, and the chip I chose is S32K311.

I want to configure flexio for SPI communication, but after I follow your tutorial configuration is complete. Burning debugging appears to be stuck in the function of the SPI transfer.
Because I set the breakpoint but the program is not stuck at the breakpoint.

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I want to know if there is something wrong with my configuration that prevents the program from running. Here's my program and I hope you can check it for me.

Finally, I hope you can provide me with a flexio spi communication program based on S32K311 version 3.5 for my reference, thank you.

[VaneB]

Hi @zenging 

Currently, the only RTD version that provides driver examples for S32K311 devices is the S32K3 Real-Time Drivers Version 3.0.0 CD04. Unfortunately, all software included in this release has Code Drop quality status in terms of testing is not fully tested. So, it is not recommended for production use but you can be used them as a reference.

BR, VaneB

[zenging]

HI @VaneB

I have some questions about the configuration of flexio. I saw in your tutorial on flexio configuration SPI that when configuring flexio_SPI components, tx, rx, clk, cs are configured using four channels and four pins.

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However, flexio's channel configuration in my version 3.5 has only two options.

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Should I check Enable Flexio Add Channel and Enable Flexio Add Pin in the configuration of Flexio_Mcl_Ip?

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Whether these configuration problems will cause my program to have problems when using the SPI transfer function so that the program can not run properly.

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Finally, the following is my project, I hope you can help me to see if there is any problem with the configuration.

[zenging]

By the way, the problem appears to be with Flexio_Mcl_Ip_GetShifterStatus() in the Flexio_Spi_Ip_SyncTransmitProcessData() function, through debugging of serial print. It seems that the IsShifterFlagRaised parameter is only set to 1 the first time TX is entered. After that, neither receive nor transmit can be set to 1. I would like to ask if this is because I have a problem with flexio_Spi configuration.

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For my spi configuration, I want to configure it to mode 1 and clock at 4Mhz. The following pictures are some of my flexio_spi configurations, hoping to correct them.

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[VaneB]

Hi @zenging 

In recent versions of the software, instead of configuring each channel separately, channel configuration is done in pairs. SpiFlexioTxAndClkChannelsConfig selects 1 PIN to configure as TX channel and 1 PIN to configure as CLK channel and SpiFlexioRxAndCsChannelsConfig selects 1 PIN to configure as RX channel and 1 PIN to configure as CS channel (the order of the pin configurations corresponds to the order in which the parameter is named).

Looking at the shared images, I see that you modified the Flexio_Spi_Ip_SyncTransmitProcessData() function, am I correct? If so, did you modify any other functions?

[zenging]

HI @VaneB 

Regarding what you said, I modified Flexio_Spi_Ip_SyncTransmitProcessData() function.In fact, I just added the function of serial print so that I know where the function is going wrong. This change should not cause problems with the function.

In addition to this function, I also added a serial print to Flexio_Spi_Ip_SyncTransmit() to find the location where my program keeps getting stuck in a loop.

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So could you please help me to see if there is something wrong with my initial configuration? Because I am not sure whether there is something wrong with the peripheral configuration of Flexio_Spi and Flexio_Mcl_Ip. What I want to configure is mode 1 of the SPI with a clock frequency of 4MHz.

[zenging]

Hi,@VaneB 

Regarding Flexio_Spi_Ip_SyncTransmit, this function can now transmit and receive data.

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But I have other problems here. My vision is to send 68 bytes of data and get 68 bytes of data at the same time. When 68 bytes of data have been sent, the program enters the DevAssert() function. The program can no longer run.

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All the received data printing is done at the bottom of Flexio_Spi_Ip_SyncTransmit. And the data I received was not what I expected. What causes this in general?

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[VaneB]

Hi @zenging 

The DEV_ASSERTs seem to be the ones called during Lpuart_Uart_Ip_SyncSend(). To verify that the UART is not interfering with the functionality, could you use breakpoints instead?