LAUNCHXL-F28P65X: LAUNCHXL-F28P65X issue with USB-UART output pin configuration

Gabor Szabo

Part Number: LAUNCHXL-F28P65X
Other Parts Discussed in Thread: SYSCONFIG

Hallo TI,

I have a question related to this topic:

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1588088/launchxl-f28p65x-issue-with-launchxl-f28p65x-usb-uart-output

I have now a working example for this SCI USB-UART configured to pins GPIO48 and GPIO49, but in the schematic of MCU117A (this is the only version on TI webpage) these two pins are connected to a pin header only... My board is MCU117B, so in this case something was changed, because otherwise it could not work with GPIO48 and GPIO49.

Can you please provide the schematics of MCU117B board?

Thank you.

3 months ago

0 Peter Luong 3 months ago

TI__Mastermind 23241 points

Hi Gabor,

We have not updated the boosterpack pinout between these 2 revisions since the board is considered in a released state. Only difference between A and B revisions would be the MCU device itself having improved test and trim

Regards,

Peter

0 Gabor Szabo 3 months ago in reply to Peter Luong

Prodigy 70 points

Hallo Peter,

thank you for the information and the quick reply.

In this case it is a mistery for me how can this USB-UART work (:

From MCU117A schematic:

Only connection of GPIO49:

Only connection of GPIO48:

Best regards,

Gábor

+1 Peter Luong 3 months ago in reply to Gabor Szabo

TI__Mastermind 23241 points

Hi Gabor,

I see you have configured the SysConfig, but are you calling the Board_init() inside your initialization code and then using the #define from the board.h file associated with the SysConfig UART configuration? Or are you using the #defines from the device.h associated with the UART pins?

Regards,

Peter

0 Gabor Szabo 3 months ago in reply to Peter Luong

Prodigy 70 points

Thank you, there was a confusion between multiple SysConfigs.

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LAUNCHXL-F28P65X: LAUNCHXL-F28P65X issue with USB-UART output pin configuration