LP-EM-CC2340R5: Instead of using XDS110 can i do a UART communication directly

Navami GS

Part Number: LP-EM-CC2340R5
Other Parts Discussed in Thread: CC2340R5, LP-XDS110ET, , SYSCONFIG

I'm using the CC2340R5 evaluation board with the XDS110 Launchpad. My requirement is to send and read messages from my laptop to the evaluation board using a TTL-USB converter. How to do this?

over 1 year ago

0 Ryan Brown1 over 1 year ago

TI__Guru**** 217237 points

Hi Navami,

The LP-XDS110ET has a direct connection with the LP-EM-CC2340R5 which uses UART communication on DIO20 for TX and DIO22 for RX, respectively. Thus with the LP-XDS110ET disconnected, you can power the LP-EM-CC2340R5 separately and directly connect the TTL-USB converter to the TX/DIO20 and RX/DIO22 lines given the correct voltage levels. Or, if the LP-XDS110ET is still connected, you must reassign the TX/RX PinMux within your CC2340R5 project's SysConfig file.

Regards,
Ryan

0 Navami GS over 1 year ago in reply to Ryan Brown1

Prodigy 180 points

Hi Ryan,

Thank you for the reply. This resolves my issue.

However, you mentioned, "if the LP-XDS110ET is still connected, you must reassign the TX/RX PinMux within your CC2340R5 project's SysConfig file." I don't understand which pin i need to reassign.

Could you please provide clarification on this?

+1 Ryan Brown1 over 1 year ago in reply to Navami GS

TI__Guru**** 217237 points

DIO22 and DIO20 are directly tied to the LP-XDS110ET female connector, so if this debugger is actively connected to the LP-EM-CC2340R5 then you must either use the XDS110 backchannel UART or re-assign TX/RX UART pins in SysConfig. This is accomplished by changing the modules Display -> Use Hardware to "None" and UART2 -> PinMux -> "TX Pin" and "RX Pin" selected between the available options. You may also consider selecting "USE CUSTOM BOARD" from the Board Display window.

https://dev.ti.com/tirex/content/simplelink_lowpower_f3_sdk_7_40_00_64/docs/ble5stack/ble_user_guide/html/ble-stack-5.x-guide/sysconfig-index-cc23xx.html
https://dev.ti.com/tirex/content/simplelink_lowpower_f3_sdk_7_40_00_64/docs/ble5stack/ble_user_guide/html/cc23xx/custom-hardware-cc23xx.html

Regards,
Ryan

0 Navami GS over 1 year ago in reply to Ryan Brown1

Prodigy 180 points

Hi Ryan

Thankyou for your continued support.

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LP-EM-CC2340R5: Instead of using XDS110 can i do a UART communication directly