CC2340R5: CC2340R5SIPA configuration for 1-wire UART with UART0RXD / UART0TXD on single pin

Hello Mike Wu1,

I hope you are doing well. For 1-wire UART you will likely need to switch to a custom hardware configuration, then you will need to build your UART code to use DIO20 for both RX and TX (*switching when needed).

Mike Wu1 said:

my customer need to develop user-define boot loader, right?

Correct, if the customer wants to do 4 wire UART then they will have to develop their own bootloader. 

Thanks,
Alex F

Hi Alex, 

Thanks for your comment.

Please help to check if TI have the HW reference design for my customer to refenerece.

Or just Pull-up DIO20_11 w/ 100Kohm.

Thanks.

Hello Mike,

I will check with our HW team if we have a reference somewhere.

Thanks,
Alex F

Hello Mike,

I got with the HW team, and we do not have a direct reference for the 1-wire UART here, they recommended to use a custom bootloader setup for 1-wire uart instead of our inbuilt Serial bootloader. 

Thanks,
Alex 

Hi Alex,

Is there a example code for custom bootloader setup for 1-wire uart ? 

Hi Alex, 

Before developing custom serial bootloader setup for 1-wire UART, the verification of 1-wire UART function in freeRTOS shall be finished first.

Please help to check if TI have the example code of 1-wire UART in freeRTOS.

Thanks.

Hello Mike Wu1,

We currently do not have a direct example of 1-wire UART, you would likely need to MUX the pin, or create your own 1-wire UART driver, as TI's driver assumes 2 wire UART is used.

Thanks,
Alex F

Got it. Thanks.