TMS320F280039C: How to send SCI Break by compulsion

Jaehoon Jeong

Prodigy 140 points

Part Number: TMS320F280039C

Hi, I'm developing 1-wire SCI communication with using TMS320F280039C & C2000_DigitalPower_SDK 4.2.0.00

SCI communication that I willing to develop starts communication with receiving SCI break.

I can make a code in receiver side like below with using C2000_DigitalPower SDK Library

if(SCI_getRxStatus(SCIA_BASE) == SCI_RXSTATUS_BREAK)

{

start communication

}

I should test communication both receiver side and transmitter side.

But I don't know how to make SCI Break in transmitter side.

SCI communication can send data once with 8-bit, but SCI Break occurs when logic low for 9.625 bit periods following a missing stop bit.

Can you tell me how to send SCI Break to receiver side from trasmitter side

over 2 years ago

0 Luke Jones over 2 years ago

TI__Mastermind 28220 points

Hi Jaehoon,

To my knowledge, the only may to manually induce a break-detect on the RX pin is to manually drive the pin low as a normal GPIO. I will confirm this with our other SCI experts and get back to you as soon as possible.

Thank you,

Luke

+1 Luke Jones over 2 years ago in reply to Luke Jones

TI__Mastermind 28220 points

Hi Jaehoon,

I discussed this with another SCI expert, and only proven way to do this is by driving the pin low as a GPIO by switching the mux option. Is this acceptable for your application?

Thank you,

Luke

0 Jaehoon Jeong over 2 years ago in reply to Luke Jones

Prodigy 140 points

Hi Luke,

Thank you for your confirmation.

I'll try to make SCI Break with using GPIO control.

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280039C: How to send SCI Break by compulsion