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UART0 routed to PL via EMIO does not send any data out

fayyazrafiq

Hi,

I am having the EMIO problem. I wanted to use PS UART0 via EMIO and connected it to PL side package pins in XPS, but i could see any data out after several tries.  I am using XPS 14.5 and SDK 14.5 with ZEDBOARD.

I also tried the XMD debugger and I can see the UART0 data out via PL package pins. I don't know where is the problem but i am struggling this problem from one week. please help me.

Any help is highly appreciated.

Regards
Fayyaz

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  • 0

    Hi Gary,

    I duplicated your instructions using Vivado 2017.2 but was not able to read anything off the TX and RX lines in my Picozed 7030 via CC V2. Here's what I did (and hopefully you might be able to see what I did wrong?):

    1. UART0 --> EMIO

    2. UART0 TX [external] --> to pin AA17 (Picozed)/JB PMOD, Pin 1 --> constraints file.

    3. UART0 RX [external] --> to pin AA16 (Picozed)JB PMOD, Pin 2 --> constrainst file.

    ie...

    set_property PACKAGE_PIN AA16 [get_ports UART0_RX]

    set_property PACKAGE_PIN AA17 [get_ports UART0_TX]

    4. Synthesized/Implemented and Generated Bitstream with no issues

    5. Export Hardware (including Bitstream) and opened the SDK

    6. In Board Support Package Settings: stdin and stdout is set to ps7_uart_0

    7. Generated Hello World using:

    a) File --> New --> Application Project --> Hello World example project...

    b) In system.mss, under peripheral drivers --> ps7_uart_0 --> Import examples --> Hello World example project...

     

    I ran both methods for step 7 but with no success. Nothing popped up on my terminal.

    Serial settings:

    Baud: 115200 (set in Vivado hardware and matched to terminal program)

    TX (Picozed) <---> RX (terminal)

    RX (Picozed) <--> TX (terminal)

    GND <--> GND

     

    Did I miss anything?


    Thank you.
     

    Regards,


    Ron.

  • 0 in reply to rwong1231

    One more thing: after regenerating the BSP sources, the problem window displayed the following message:

    missing initializer for field 'HandlerTable' of 'XScuGic_Config {aka struct <anonymous>}' [-Wmissing-field-initializers]

    I'm not sure if this may contribute to the issue I'm having but am putting it in here in case it does.

    Severity: warning

    Ron.

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