EK-TM4C1294XL: Questions on implementing RS422 or RS232 in software?

Julio Apps

Part Number: EK-TM4C1294XL

Hello Team,

I am working with a customer whom i am trying to provide some information regarding the following. Can you provide some guidance on where to start? He is trying to implement a 25 pin serial interface RS422 or RS232.

2) Determine if the built in TIVA-C serial controllers can support the desired protocols or do we need an external synchronous serial controller for the desired protocols? Our baud rate is 38.4Kbps and below. (25 pin serial port would support being configured via software to either RS422 or RS232)

3) If there is code available I know who would like to see it.

over 4 years ago

0 Bob Crosby over 4 years ago

TI__Guru 72500 points

RS422 and RS232 describe the electrical interface of serial communications. The UARTs of the TM4C129 can support either, but they require different line drivers/receivers. RS422 is differential, RS-232 is single ended bi-polar (positive and negative with respect to ground).

0 Julio Apps over 4 years ago in reply to Bob Crosby

TI__Expert 3665 points

Hi Bob,

Thank for the clarification, i looked at the exact protocols the customer is looking to support (HDLC ISO/IEC 13239:2002, and Genysis ) . Do you have any familiarity with this? They are serial protocol's, i guess from the micro perspective its about the correct software implementation and the correct line driver's in hardware.

0 Bob Crosby over 4 years ago in reply to Julio Apps

TI__Guru 72500 points

Sorry, we do not have any examples implementing those protocols. You are correct about software for the protocol and the correct line driver hardware.

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EK-TM4C1294XL: Questions on implementing RS422 or RS232 in software?