CC2640R2L: uart expand

Colin Chen

Mastermind 25541 points

Part Number: CC2640R2L

CC2640R2L has only 1 uart, My customer need 2 uarts.

1.Can GPIO be used to simulate uart for communication?

2.If it is not feasible, is there any other way to solve it？

over 5 years ago

0 IUsedToBeARealPerson (M-W) over 5 years ago

TI__Guru 58425 points

Hi Qixiang,

There are two options, either they implement a SW based solution for the second UART or they leverage the UART emulator of the Sensor Controller, an example of this exists in Sensor Controller Studio.

0 Colin Chen over 5 years ago in reply to IUsedToBeARealPerson (M-W)

TI__Mastermind 25541 points

Hi M-W,

Thanks for your reply. My customer would use 2 uarts at the same time, and there is not a Sensor Controller in CC2640R2L.

0 IUsedToBeARealPerson (M-W) over 5 years ago in reply to Colin Chen

TI__Guru 58425 points

Hi Qixiang,

My bad, I read the part number/name a bit to fast. In the case of the "L" device, implementing a SW based solution is the only and best approach really. It could be that they could take advantage of the SPI module while doing so in order to lower the SW a bit but that would really only work for a TX only UART:

www.ti.com/.../spna234.pdf

0 Colin Chen over 5 years ago in reply to IUsedToBeARealPerson (M-W)

TI__Mastermind 25541 points

Thank you for your support !

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CC2640R2L: uart expand