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PS SPI Pmod JE7 Hardware system

Former Member

Hello everyone,

I'm in the process of interfacing my Avnet CC3000-Pmod Compatible Wi-Fi Adapter to the ZedBoard via the JE7 Pmod header, which is connected to the PS.

At first I thought this should be a simple thing, since creating a hardware system that includes SPI was so simple, but ...

When I try to use the SPI device (via the SpiPs device driver), I am stuck in the XSpiPs_PolledTransfer() function, waiting for the status register flag that indicates the transmission has finished (XSPIPS_IXR_TXOW_MASK). The reason that the flag never comes, is that I read nonsense values from the register (a 0x2 in this case).
Then I added the XSpiPs_SelfTest() function, which failed at the very first register read. So I'm guessing there is something wrong with my hardware design.

I got the Zynq IP setup & configured as follows:

  +--------------------------------+
  |         ZYNQ               DDR +-----> DDR
  |                       FIXED_IO +-----> FIXED_IO
  |                       USBIND_0 +-
-+ TTC0_CLK0_IN         M_AXI_GP0 +-
-+ TTC0_CLK1_IN    TTC0_WAVE0_OUT +-
-+ TTC0_CLK2_IN    TTC0_WAVE1_OUT +-
+-+ M_AXI_GP0_ACLK  TTC0_WAVE2_OUT +-
| |                      FCLK_CLK0 +--+
| |                  FCLK_RESET0_N +- |
| +--------------------------------+  |
+-------------------------------------+

SPI 1: MIO 10 .. 15
SS[1] IO MIO 14
SPI 1 MIO 10 mosi
SPI 1 MIO 11 miso
SPI 1 MIO 12 sclk
SPI 1 MIO 14 ss[1]

The clock is set to ca. 16MHz, which is the maximum the CC3000 can take.

Has anybody had any experience with the CC3000 Adapter, Pmod or SPI on the ZedBoard? I'd be very glad for any help, since I'm pretty much stuck here.

With best regards,
Darius

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    Hi Darius

    If you want to be able to work on the lowest level of SPI by bitbanging, then I can help!

    I did not manage to get SPI 1 to talk to the JE7 pins, however I could do it by enabling GPIO.. I used this to enable writing to an SD card in SPI mode, over the GPIO pins 40-47 (SD card slot)

    ( http://www.zedboard.org/content/sdio-windows-7 )

    #define MIO_09_JE8 t9
    #define MIO_10_JE2 t10
    #define MIO_11_JE3 t11
    #define MIO_12_JE4 t12
    #define MIO_13_JE1 t13
    #define MIO_14_JE9 t14
    #define MIO_15_JE10 t15

    #define PIN_HIGH 1
    #define PIN_LOW 0

    int main(void)
    {
    tXGpioPs Gpio;
    tXGpioPs_Config * ConfigPtr = XGpioPs_LookupConfig(XPAR_PS7_GPIO_0_DEVICE_ID);
    tXGpioPs_CfgInitialize(&Gpio, ConfigPtr, ConfigPtr->BaseAddr);

    t//set JE1 to output -> pin high
    tXGpioPs_SetDirectionPin(&Gpio, MIO_13_JE1, MIO_OUTPUT);
    tXGpioPs_WritePin(&Gpio, MIO_13_JE1, PIN_HIGH);
    t
    t//set JE1 to output -> pin low
    tXGpioPs_SetDirectionPin(&Gpio, MIO_13_JE1, MIO_OUTPUT);
    tXGpioPs_WritePin(&Gpio, MIO_13_JE1, PIN_LOW);
    t
    t//set JE2 to input -> read pin
    tXGpioPs_SetDirectionPin(&Gpio, MIO_42_SD_P7_MISO, MIO_INPUT);
    tXGpioPs_ReadPin(&Gpio,MIO_10_JE2);

    t//etc etc...

    treturn 0;
    }

    Does that help at all?

    Kenny

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  • 0

    Hi Darius

    If you want to be able to work on the lowest level of SPI by bitbanging, then I can help!

    I did not manage to get SPI 1 to talk to the JE7 pins, however I could do it by enabling GPIO.. I used this to enable writing to an SD card in SPI mode, over the GPIO pins 40-47 (SD card slot)

    ( http://www.zedboard.org/content/sdio-windows-7 )

    #define MIO_09_JE8 t9
    #define MIO_10_JE2 t10
    #define MIO_11_JE3 t11
    #define MIO_12_JE4 t12
    #define MIO_13_JE1 t13
    #define MIO_14_JE9 t14
    #define MIO_15_JE10 t15

    #define PIN_HIGH 1
    #define PIN_LOW 0

    int main(void)
    {
    tXGpioPs Gpio;
    tXGpioPs_Config * ConfigPtr = XGpioPs_LookupConfig(XPAR_PS7_GPIO_0_DEVICE_ID);
    tXGpioPs_CfgInitialize(&Gpio, ConfigPtr, ConfigPtr->BaseAddr);

    t//set JE1 to output -> pin high
    tXGpioPs_SetDirectionPin(&Gpio, MIO_13_JE1, MIO_OUTPUT);
    tXGpioPs_WritePin(&Gpio, MIO_13_JE1, PIN_HIGH);
    t
    t//set JE1 to output -> pin low
    tXGpioPs_SetDirectionPin(&Gpio, MIO_13_JE1, MIO_OUTPUT);
    tXGpioPs_WritePin(&Gpio, MIO_13_JE1, PIN_LOW);
    t
    t//set JE2 to input -> read pin
    tXGpioPs_SetDirectionPin(&Gpio, MIO_42_SD_P7_MISO, MIO_INPUT);
    tXGpioPs_ReadPin(&Gpio,MIO_10_JE2);

    t//etc etc...

    treturn 0;
    }

    Does that help at all?

    Kenny

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