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SPI Self Test Fails

Former Member

I'm having trouble getting the SPI Self Test example to pass. I'm using Vivado 2014.4.


I checked both SPI peripherals in the "MIO Configuration" in Vivado. "ps7_spi_0" and "ps7_spi_1" both show up in system.mss in my BSP in the SDK. The base address for both peripherals is correct in "xparameters.h".


I imported the Xilinx example project "xspips_selftest_example" and ran it both for device ID 0 and 1 (SPI 0 and SPI 1) and both failed. The part it fails at is in the "int XSpiPs_SelfTest(XSpiPs *InstancePtr)" function it calls the "XSpiPs_Reset" function and then checks that the SPI registers are in their default state, which they are not which causes the test to fail.


Does anyone know where I can dig to find out why this test might be failing? Or maybe the test is out of date and shouldn't actually work in the first place? Thanks!


edit: To get into more detail of why the test is failing: The driver performs a reset on the SPI peripheral and then reads back the register value to see if it gets an expected value in the "Config_reg" register. The expected value is 0x00020000, but it actually reads back 0x00000000 which causes it to fail this test. I looked at the register value in Eclipse and it is indeed 0x00000000. I tried manually changing the register value and it has no effect, even though many of the bits are read/write according to the Technincal Reference Manual.

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  • 0

    You might want to look at which MIO signals you assigned to your PS SPI ports. While the MIO assignments for SPI 1 include the MIO pin that go to the MicroZed PS PMOD port the only MIO assignments that work for SPI 0 are also used by the default Ethernet or USB ports which are already connected to those peripherals on the MicroZed.

     

    I built a quick Vivado 2014.4 project for the MicroZed and assigned SPI 1 to MIO connected to the PMOD port and assigned SPI 0 to EMIO. I then exported the design to SDK. There I used the 'New Application' > 'Peripheral Test' template to generate a test program. The C code supplied here also uses the XSpiPS_SelfTest function and passed with no issues when I ran the test application. You might what to use this approach and look at how this example code calls the self test functions.

     

    -Gary

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  • 0

    You might want to look at which MIO signals you assigned to your PS SPI ports. While the MIO assignments for SPI 1 include the MIO pin that go to the MicroZed PS PMOD port the only MIO assignments that work for SPI 0 are also used by the default Ethernet or USB ports which are already connected to those peripherals on the MicroZed.

     

    I built a quick Vivado 2014.4 project for the MicroZed and assigned SPI 1 to MIO connected to the PMOD port and assigned SPI 0 to EMIO. I then exported the design to SDK. There I used the 'New Application' > 'Peripheral Test' template to generate a test program. The C code supplied here also uses the XSpiPS_SelfTest function and passed with no issues when I ran the test application. You might what to use this approach and look at how this example code calls the self test functions.

     

    -Gary

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  • 0 in reply to Former Member

    Hi Gary,

    I tried starting a new project with no other components on the board except the ZYNQ7 Processing System. I ran design automation which connected the fixed IO and the DDR. Then I started a C project and used the "Peripheral Test" template as you suggested.

    All of the tests passed except for the SPI test. I'll post the results below:

    ---Entering main---

    Running ScuGicSelfTestExample() for ps7_scugic_0...
    ScuGicSelfTestExample PASSED
    ScuGic Interrupt Setup PASSED

    Running XDmaPs_Example_W_Intr() for ps7_dma_s...
    Test round 0
    XDmaPs_Example_W_Intr PASSED

    Running QspiSelfTestExample() for ps7_qspi_0...
    QspiPsSelfTestExample PASSED

    Running DcfgSelfTestExample() for ps7_dev_cfg_0...
    DcfgSelfTestExample PASSED

    Running ScuTimerPolledExample() for ps7_scutimer_0...
    ScuTimerPolledExample PASSED

    Running Interrupt Test  for ps7_scutimer_0...
    ScuTimerIntrExample PASSED

    Running Interrupt Test  for ps7_scuwdt_0...
    ScuWdtIntrExample PASSED

    Running SpiPsSelfTestExample() for ps7_spi_1...
    SpiPsSelfTestExample FAILED
    ---Exiting main---

    I'm using SPI1 on MIO pins 10, 11 and 12 with ss[0] set to MIO13. I'm not sure how to post images on this forum or I could add a screenshot.

    Thanks for the suggestion, I'm just not sure why it isn't working for me. Is there any way you could post your project so that I could open it and try running it?

  • 0 in reply to Former Member

    In my project I selected the MicroZed 7020 board and used the MicroZed Board Definition Files available here:

    http://zedboard.org/support/documentation/1519

     

    When I added the Zynq PS System and ran the 'Automation' I did leave the 'use board presets' checked. I left all of the peripherals selected by the preset enabled (including Ethernet) and added PS SPI 0 and PS SPI 1. I selected MIO 10...15 for SPI 1 as you did. Then I generated a bitstream and exported the design to SDK.

     

    Given that I do not see the Interrupt Test for ps7_ethernet in your test results I suspect that you did not use the same board definition files. I would install the Avnet MicroZed board definition files and select the MicroZed board (7010 or 7020) and then generate your design. I would use the board presets and then just delete any peripherals you do not want.

     

    -Gary