How to use TCK, TDI, TMS, TDO pins as GPIO during normal functioning?

Hi Mahesh,

Please check the SPRUFN3D doc: Here's your answer

Regards,

Gautam

Hi Gautam,

  Thanks for the reply.

In CCS we write the below instruction to make the I/O line General purpose I/O 

GPIO_setMode(myGpio, GPIO_Number_1, GPIO_1_Mode_GeneralPurpose);

and below instruction to make it output.

GPIO_setDirection(myGpio, GPIO_Number_1, GPIO_Direction_Output);

For the GPIO 35-38 No instruction is required, If we make TRST=0 externally, these pins become General purpose I/O.

Do I need to write below instruction to make it output & Input?

GPIO_setDirection(myGpio, GPIO_Number_35, GPIO_Direction_Output);

GPIO_setDirection(myGpio, GPIO_Number_36, GPIO_Direction_Input);

Please clarify.

Regards,

Mahesh K.R.

Do I need to write below instruction to make it output & Input?

GPIO_setDirection(myGpio, GPIO_Number_35, GPIO_Direction_Output);

GPIO_setDirection(myGpio, GPIO_Number_36, GPIO_Direction_Input);

Yes, writing the instruction is always recommended.

Regards,

Gautam

Hi Gautam,

  Thank you very much for the support. It is working. I checked GPIO_Number_35. I got three more GPIO. I think TD0 can be used only as an input. There is no output option in the block diagram.

Regards,

Mahesh K.R.

Yes Mahesh, TDO can only be used as input. Hope all your queries have been answered, if so please close this thread by verifying the answer.

Regards,

Gautam

Hi Gautam,

  You are right. Now I am clear. I am not able to see the " Verify Answer" button.

Regards,

Mahesh K.R.