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HELP!! how to get data from RXD of PIC16F877? (RS 232)

 
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cxiong



Joined: 09 Sep 2003
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HELP!! how to get data from RXD of PIC16F877? (RS 232)
PostPosted: Fri Oct 31, 2003 2:43 pm     Reply with quote

I try to experiment on the wireless Technology and use the XMIT & RCV channel of the PIC above.

I know that when you printf(" .......",x) is to send the serial data to the TX line or to the PC, but I want to read the data of the RVC line of my wireless receiver module and display the data in portc.

The data from the transmitter was a temperatue sensor attached to ADC (10-bits)channel0 of a PIC16F877. The transmitter get the sensor data and transmit it to the TX line. The TX line was connected to a wireless transmitter module.

What code should I use to get the sensor data?

Any body got an example code in PIC C?

Please help.
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Fri Oct 31, 2003 3:36 pm     Reply with quote

Are you asking how to get a byte that has been received by the USART ?

The answer is, use the getc() function. Example:

main()
{
char c;

c = getc();


while(1);
}
Guest








PostPosted: Mon Mar 15, 2004 6:49 pm     Reply with quote

i was going through the search looking for help on cummunicating wireless between to pics,


from the above it lloks like all i need to do is connect the transmitter to c6 the tx pin, and printf(",,,,",x) whatever i need.

then to recieve i just connect the rx to c7 the recieve pin and use a getc command,

is it this easy, i doubt it.
PCM programmer



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PostPosted: Mon Mar 15, 2004 6:58 pm     Reply with quote

I wouldn't draw a lot of conclusions from my answer to him.

He didn't give all the details necessary for a complete
answer, to I just gave him the most simple answer possible.
treitmey



Joined: 23 Jan 2004
Posts: 1094
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PostPosted: Tue Mar 16, 2004 12:37 pm     Reply with quote

remember also that if you don't use a RS232 level converter,..ie max232 then you need to INVERT the signal.
Code:

#use rs232(baud=19200, xmit=PIN_E0, INVERT, stream=debug)
[/code]
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