AM67: How to configure DTS of RS485 to enable flow control?

Zekun Bai

Part Number: AM67
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Customer are implementing HW flow control based on AM67.

Here they use UART1 UART2 UART3 UART4 UART5 UART6.

For UART1 and UART2, they use UART_RTS pin. For other UART, they use general GPIO.

UART1-UART2

UART3 - UART6

And here is their DTS file, could you help check three things?

1. If need implement flow control, UART_RTS pin is necessary for rts-GPIO? Can general GPIO be used as rts-GPIO for UART3 - UART6?

2. For UART1 and UART2, the DTS configuration is right or not?

3. Is SW flow control in SDK ready or just HW flow control?

Regards

Zekun

+1 Keerthy J 1 month ago

Hello Zekun,

As responded in the other thread that Software flow control may not be functional. Closing this thread as well.

- Keerthy

0 Zekun Bai 1 month ago in reply to Keerthy J

Hi Keerthy

This is HW flow control solution..

Regards

Zekun

0 Keerthy J 1 month ago in reply to Zekun Bai

Zekun,

I am looping in hardware expert for the flow control for other UARTs which do not have pins by default in the SoC.

Zekun Bai said:
SW flow control in SDK ready or just HW flow control?

HW flow control.

Zekun Bai said:
UART1 and UART2, the DTS configuration is right or not?

You can use the sysconfig tool to get that.

Best regards,

Keerthy

0 Zekun Bai 1 month ago in reply to Keerthy J

Hi Keerthy

I have helped customer fix this issue, Thanks.

Close it.

Regards

Zekun

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