IMXRT 1064 with KSZ8081RNB interface

[vasudhevan]

Hi,

     I checked with imxrt1064 evk schematic ENET_INT and ENET_RST connected to jtag.

     Imported tcpecho echo example code this two pins controlled manually by using GPIO.

     Compulsory we needs to handle these two pins ?  

                                    (or)

     Can we connect two pull up resistor these two pins with out handling gpio ?   

Thanks & Regards 

         Vasu

[fangfang]

Hello.

  By default i.MX RT1050 uses the SWD interface for debugging, applyingonly JTAG_TMS (as SWD_DIO) and  JTAG_TCK (as  SWD_CLK) signals.This allows to use other JTAG related pins  for different functionality.

 For ENET_INT please use the GPIO.

For ENET_RST can use pull up resistor for it.

Have a nice day.

[vasudhevan]

Hi,

    IMX RT 1064 evk schematic

                 ENET_INT connected to JTAG_TDO

                 ENET_RST connected to JTAG_TDI

    If we change these two pins value how jtag working without disconnecting from debugger ?

This code i took from tcpecho example 

     GPIO_PinInit(GPIO1, 9, &gpio_config);
     GPIO_PinInit(GPIO1, 10, &gpio_config);
       /* pull up the ENET_INT before RESET. */
     GPIO_WritePinOutput(GPIO1, 10, 1);
     GPIO_WritePinOutput(GPIO1, 9, 0);
     delay();
     GPIO_WritePinOutput(GPIO1, 9, 1);

Can you give code example for handling gpio (For ENET_INT please use the GPIO) ?

Thanks & Regards

          Vasu

[fangfang · Accepted solution]

Hello,

>>If we change these two pins value how jtag working without disconnecting from debugger ?

ENET_INT/ ENET_RST and JTAG_TDO/JTAG_TDI can use at the same time.

And for the code please remove  GPIO_WritePinOutput(GPIO1, 10, 1);  delay() time please refer to KSZ8081RNB file.

[vasudhevan]

Hi fangfang,

     Thank you.