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overmindx
Joined: 06 Oct 2008
Posts: 43
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| disable tx pin using 18f67k22 |
 Posted: Fri Jan 27, 2012 2:49 am |
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hi, im trying to disable the tx pin in my software uart.
can i disable my tx pin (PIN_E2) using this code?
| Code: |
#byte TXEN = 0xAC // location of TXSTA1 register
#use rs232(force_sw,invert,baud=1200,BRGH1OK, parity=e, bits=7, stop=1,xmit=PIN_E2,rcv=PIN_E3, stream=SDI12)
void disableXT()
{
bit_clear(TXEN,5) // disable transmit
}
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please help.. thanks |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19382
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| Posted: Fri Jan 27, 2012 3:00 am |
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Using a _software UART_, which you are doing, _none_ of the internal registers come into play at all. Hence changing TXEN, does absolutely nothing.
Seriously, with a software UART, if you don't use the output, you can drive the pins completely normally. If you want the pin to go high, just set pin_e2 high. If you want it to be an input, just read from it.....
Best Wishes |
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