CC2650 Baudrate Setup

Kuo Austin

Prodigy 110 points

Other Parts Discussed in Thread: CC2650, LAUNCHXL-CC2650

Hi All

Can the baudrate of the CC2650 be set higher than 115200? (ex:256000)

I want to transfer large amounts of data.

I hope to reduce time.

over 2 years ago

0 Ryan Brown1 over 2 years ago

TI__Guru**** 220427 points

Hi Kuo,

The Datasheet lists baud rates up to 3MBaud, which is also supported in the TI Driver. Thus the device is capable, although be cautious of physical hardware limitations.

Regards,
Ryan

0 Kuo Austin over 2 years ago in reply to Ryan Brown1

Prodigy 110 points

Thanks for your reply.

If the defined gpio has sensor controller function.

Will it affect?

+1 Ryan Brown1 over 2 years ago in reply to Kuo Austin

TI__Guru**** 220427 points

You should not be using one pin to accomplish UART peripheral and Sensor Controller functionality while both are being used simultaneously. Note that the SCS UART Emulator has a maximum baud rate of 115200

Regards,
Ryan

0 Kuo Austin over 2 years ago in reply to Ryan Brown1

Prodigy 110 points

Thanks a lot.

0 Kuo Austin over 2 years ago in reply to Ryan Brown1

Prodigy 110 points

Hi Ryan

I set gpio to only uart function.

But it doesn't work at baud rate 256000.

baud rate 115200 is ok.

Could there be another reason?

0 Ryan Brown1 over 2 years ago in reply to Kuo Austin

TI__Guru**** 220427 points

Hi Kuo,

What hardware are you evaluating? There could be a physical limitation. Have you tried other baud rates, even smaller ones, such as 9600 or 128000? This would help confirm whether you are correctly changing the baud rate in your code. Have you tested with the UART Echo example?

Regards,
Ryan

0 Kuo Austin over 2 years ago in reply to Ryan Brown1

Prodigy 110 points

I have tried to use 128000 is work.

But can't choose higher.

The usb-to-serial pcb has been confirmed by HW to support up to 3m

I am sending from windows pc to mcu through usb to uart.

0 Kuo Austin over 2 years ago in reply to Ryan Brown1

Prodigy 110 points

Sorry, My mistake.

My usb-to-uart pcb supports higher baudrate.

But its FW should not support.

Because I could used other usb-to-uart to got data on higher baudrate.

0 Ryan Brown1 over 2 years ago in reply to Kuo Austin

TI__Guru**** 220427 points

I just confirmed a baud rate of 921600 with the LAUNCHXL-CC2650, the UART Echo example, and a terminal emulator. Thus the issue you are experiencing is based on the hardware and tool resources you are using, not the CC2650. There have been similar instances on the E2E of users having difficulty increasing the baud rate.

Regards,
Ryan

0 Kuo Austin over 2 years ago in reply to Ryan Brown1

Prodigy 110 points

Thanks for your help

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CC2650 Baudrate Setup