MSPM0G3507: MSPM0G UART break mode

Bhushan Khole

Prodigy 50 points

Part Number: MSPM0G3507

Tool/software:

Hi,

I need to insert UART break mode for MSPM0 UART interface with DAC device supporting UART in break mode.

Is there any hardware support in MSPM0 MCU hardware to insert UART break mode?

Or having the TX pin turned into GPIO mode momentarily for inserting UART break mode is the only option?

Regards,

Bhushan

over 1 year ago

+1 Bruce McKenney over 1 year ago

Guru 99105 points

According to TRM (SLAU846A) Table 16-42, you can generate a Break by setting LCRH.BRK=1. You have to time it (11 bit-times) yourself. It's intended for LIN, but I don't see anything preventing you from using it otherwise. I see Driverlib functions "DL_UART_[enable/disable]LINSendBreak" [dl_uart.h] which do this.

For receiving a Break, there's a BRKERR indicator [Ref TRM Table 16-2]

[Edit: Minor clarification]

0 Zoey Wei over 1 year ago

TI__Genius 10611 points

Hi Bhushan,

Totally agree with Bruce.

For send break, you can use LCRH register.

    DL_UART_enableLINSendBreak(UART_0_INST);
    delay_cycles(16000);
    DL_UART_disableLINSendBreak(UART_0_INST);

Regards,

Zoey

0 Bhushan Khole over 1 year ago in reply to Zoey Wei

Prodigy 50 points

Thanks Bruce for super fast response.

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MSPM0G3507: MSPM0G UART break mode