Need help regarding SCI communication

Posted on August 16, 2005 at 15:44

Hi,

I am using ST72F264 micro with SCI communication. In my application I need to enable my RS232 transceiver while transmitting and disable it when transmission is complete.

It is possible to get an interrupt when the content of the TDR register is transferred into the shift register but I need to know when the shift register finished to disable the RS232 driver.

Does anyone know a way to get an interrupt when the shift register finishes?

Posted on August 17, 2005 at 04:47

Hi Gilat,

what about the TC-flag? (chapter 11.5.7 of the datasheet)

Bit 6 = TC Transmission complete.

 

This bit is set by hardware when transmission of a

 

frame containing Data is complete. An interrupt is

 

generated if TCIE=1 in the SCICR2 register. It is

 

cleared by a software sequence (an access to the

 

SCISR register followed by a write to the SCIDR

 

register).

 

0: Transmission is not complete

 

1: Transmission is complete

 

Note: TC is not set after the transmission of a Preamble

 

or a Break.

Regards

WoRo

Posted on August 17, 2005 at 19:03

Thanks!

I missed that....