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CC2652R7: UART2 is not working in DIO17 and DIO18

Part Number: CC2652R7

Hi

SDK Used : simplelink_cc13xx_cc26xx_sdk_7_10_01_24

Code Used : display_LP_CC2652R7_tirtos7_ticlang

EVK Using : CC2652-R7 Development kit

In default code "display_LP_CC2652R7_tirtos7_ticlang" -> display.syscfg file -> Display -> I used "CONFIG_Display_UART" . In this below are the changes i did,

Existing Configuration : 

Use Hardware : XDS110 UART

PinMux 

Tx pin : DIO02

Rx pin : DIO03

Changed configuration I did : 

Use Hardware : None

PinMux 

Tx pin : DIO17

Rx pin : DIO18

After I changed this configuration, UART was not working. I using the display UART only If I used normal UART also not working. When I selected the Tx pin as DIO00 and Rx pin as DIO01 It is working but If i used the Tx pin as DIO17 and Rx pin as DIO18 It is not working.

If I used the same configuration in CC2652R1 EVK, Display UART is working with DIO17 and DIO18.

Please help here. I want the the UART to be worked with Tx pin as DIO17 and Rx pin as DIO18 in CC2652R7 chipset

  • Hi mohan,

    Your experiments with DIO0/DIO1 confirm that you have the correct method in place.  From the LP-CC2652R7 Design Files you will find that DIO17/DIO18 are connected to TDI/SWO, respectively.  These are XDS110 JTAG debugger pins, thus you will need to make sure that:

    1. TDI and SWO jumpers are not connected on the XDS110 header row of the LP-CC2652R7.
    2. Your project configuration (.ccxml) file is not using 4-wire JTAG, which would require use of TDO/TDI lines.

    Regards,
    Ryan