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Pull Tx low?

 
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cerr



Joined: 10 Feb 2011
Posts: 241
Location: Vancouver, BC

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Pull Tx low?
PostPosted: Fri Mar 11, 2011 5:39 pm     Reply with quote
Hi There,

I would like to pull low the Tx of my RS232 USART to signal the other PIC that it should enter into the bootloader mode but I don't know how to get this done, I declared the rs232 port like this:
Code:
#use rs232(baud=9600,parity=N,xmit=PIN_G1,rcv=PIN_G2,stream=MCU1)

and tried this to pull down Tx which didn't work... :(
Code:
output_low(PIN_G1);


Any suggestions on how i could solve this? Should I, Can I switch off the RS232 USART while my app is running, I reset the other MCU and once it has entered the bootloader mode, I'd switch on the rs232 interface to send out the data.

Thanks
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Fri Mar 11, 2011 10:06 pm     Reply with quote
This thread about sending a break character, may help:
http://www.ccsinfo.com/forum/viewtopic.php?t=42857
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