Additional UART channel on a C55XX possible ?

citizen

Hi,

I'm a little at a loss how to add an additional UART channel to a C55XX ultra-low power device to treat two independent and asynchronous serial ports ? These devices have only one UART channel and we're already multiplexing this port amongst two other peripherals, but that's ok as we don't use the peripherals at the same time, and only switch them when needed.

However now with additional peripherals it looks like an additional, independent UART will be necessary ... I'm thinking about the unused INT0 interrupt pin on the DSP possibly coming into play, generated by and IRQ from an external UART bridge or something similar, servicing the received data as interrupted, however this adds complexity and cost ... perhaps there might be other ways to do it without and external UART bridge ??

Does TI propose such devices - a SPI Slave to UART bridge ? I'd love to hear some thoughts on this ...

Regards, Mike

over 7 years ago

0 Lalindra Jayatilleke over 7 years ago

TI__Mastermind 30365 points

Hi Mike,

Not that I'm aware of. Did you consider perhaps adding something like a MSP430 to the C55x SPI interface to perhaps add more UART ports that will interface to the MSP430? Just a thought.

Lali

0 citizen over 7 years ago in reply to Lalindra Jayatilleke

Expert 2770 points

Hi Lalindra,

I was thinking more along the lines of a TL16C752C or similar however a dual channel is not necessary, and a SPI bus interface would be nice. Will look into it thanks for the reply.

Regards,

Mike

0 Lalindra Jayatilleke over 7 years ago in reply to citizen

TI__Mastermind 30365 points

Mike,

No worries.
Would appreciate it if you could please click "Verify Answer" on the response in order to close out the thread. Thanks.

Lali

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Additional UART channel on a C55XX possible ?