RTOS/TDA3XEVM: change baud rate at uart1

Terry17

Prodigy 250 points

Part Number: TDA3XEVM

Tool/software: TI-RTOS

Hi,

I got a radar sensor and its interface is UART baudrate 460800.

I want to use tda3xx uart1 to connect the sensor.

I refer to links_fw/src/rtos/utils_common/src/utils_uart.c to create a instance for uart1.

When I set the baudrate to UART_BAUDRATE_9_6K and UART_BAUDRATE_115_2K

to test sent and receive. It is fine.

The system is halt if I set 460800.

There are no default baudrate for 460800.

Can it support this baudrate?

over 7 years ago

0 Stanislav Stilyanov over 7 years ago

TI__Mastermind 18900 points

Hi,
According to TRM, this baudrate should be possible. Only divider settings differ between the 2 baudrates. This should be a software driver issue.

Regards,
Stan

0 Terry17 over 7 years ago in reply to Stanislav Stilyanov

Prodigy 250 points

Hi Stan,

Thanks for the reply.

According to the TRM, the baudrate 460800 is listed.

Could you tell me which file it set the baudrate in driver or how to read/write in the baudrate 460800?

I'm not clear how DEV_construct() in links_fw/src/rtos/utils_common/src/utils_uart.c works.

Thanks.

Best regards,

Terry

0 Terry17 over 7 years ago

Prodigy 250 points

Dear experts,

Could anyone help me to use uart at baudrate 460800?

I need to read data from it.

VSDK 3.2

TDA3xx

Thanks,

Terry

0 Yordan Kamenov over 7 years ago in reply to Terry17

TI__Mastermind 42515 points

Hi Terry,

can you try the CSL Uart example from here:
processors.wiki.ti.com/.../PDK_TDA_CSL_User_Guide
and see if you are able to run at baudrate 460800?
(Look at the beginning of the page for instruction hot to build CSL examples)

Regards,
Yordan

0 Terry17 over 7 years ago in reply to Yordan Kamenov

Prodigy 250 points

Hi Yordan,

Yes.

C:\PROCESSOR_SDK_VISION_03_02_00_00\ti_components\drivers\pdk_01_08_01_06\packages\ti\csl\example\uart\

Three samples can set baudrate 460800 and works.

Can it integrate to vsdk?

Most functions only in csl examples.

I'll try to include them.

0 Prasad Konnur over 7 years ago in reply to Terry17

TI__Expert 6065 points

Hi Terry,

You can use the CSL functions and configure the particular UART instance is not used by VSDK.
VSDK uses the UART for printing on the console and for some sensors.
Note that this is not validated, but it should work.

Also the VSDK uses the driver present in the ti_components\drivers\pdk\packages\ti\drv\bsp_lld\uart.
The driver doesnot support the baudrate you are referring.
But if you want you can add the support for the different baudrate by re configuring the dividers.
You can refer to the driver implementation for the baudrate UART_BAUDRATE_115_2K.

Regards,
Prasad

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RTOS/TDA3XEVM: change baud rate at uart1