AWR1642: RS232 on AWR1642

prateek hegde

Part Number: AWR1642

Hi all,

How to send the data over RS232 from AWR1642?. I wanted to send the detected object information from the RS232 pins(Tx pin). In the schematics it is shown that the pin5 of J6 connector is connected to the TX pin of the RS232 of the device. Demo programs sends the detected object through USB but not to this port. How to write the data to this port?.

Even I tried to capture the data from the AR_MSS_LOGGER but no data captured.

Thanks in advance

Prateek

over 6 years ago

0 Cesar over 6 years ago

TI__Guru*** 148804 points

Hi,

Are you using AWR1642BOOST or are you designing your own board?

Thank you
Cesar

0 prateek hegde over 6 years ago in reply to Cesar

Intellectual 380 points

On AWR1642 ONLY

0 aozer over 6 years ago in reply to prateek hegde

TI__Mastermind 30545 points

Hello Prateek,

The data is sent out via the MSS_LOGGER pin to the TM4C microcontroller. The MCU then does RS232 to FTDI conversion and sends the data out over USB.

Regards,

Adrian

0 prateek hegde over 6 years ago in reply to aozer

Intellectual 380 points

Dear all
We checked MSS_LOGGGER pin on the oscilloscope(J5 connector ,AR_MSS_LOGGER,Pin 9 of J5 connector) , but not able to capture the data. Why so???

Thanks in advance

Prateek

0 aozer over 6 years ago in reply to prateek hegde

TI__Mastermind 30545 points

Hello Prateek,

You need to populate R26 to bring out the pin to the J5 connector. The 0ohm resistor is DNI by default.

Regards,

Adrian

0 Mingsai Huan over 6 years ago in reply to aozer

Prodigy 30 points

Hello aozer，

How can I convert TTL signal to RS232 TX/RX on J6?

What is this RS232 level ?

Thanks

0 aozer over 6 years ago in reply to Mingsai Huan

TI__Mastermind 30545 points

Hello Mingsai,

You can use any FTDI to USB adapter, like this: www.adafruit.com/.../70

The voltage level is 3.3V, so make sure that the adapter you use is for 3.3V and not 5V.

Regards,

Adrian

0 Mingsai Huan over 6 years ago in reply to aozer

Prodigy 30 points

Thanks for your reply,

Now, I know how to convert FTDI to USB.

And how to connect this FTDI serial port on J6 to general TTL on another MCU?

0 aozer over 6 years ago in reply to Mingsai Huan

TI__Mastermind 30545 points

Hello Mingsai,

These pins on the AWR1642 can already directly interface with a SCI on an MCU, there should be no conversion needed.

Regards,

Adrian

0 Mingsai Huan over 6 years ago in reply to aozer

Prodigy 30 points

Thanks,

How to connect RS232 pins on J6 with USART pins in STM32 MCU?

What's the difference between SCI and UART?

0 aozer over 6 years ago in reply to Mingsai Huan

TI__Mastermind 30545 points

Hello Mingsai,

UART is a type of SCI. SCI is just a serial communication interface, which encompasses different types of interfaces.

Assuming the STM32 has a standard 3.3V UART there should be no issue with directly connecting the uart on the AWR1642 and STM32.

Regards,

Adrian

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AWR1642: RS232 on AWR1642