Rs232 on Pic 16F877A

[williB]

i used Mike's rs232 converter in place of a max 232 chip
thanks Mike !
it worked , but i had to use the +12V on the breadboard ,instead of pin 7
pin 7 didnt work ?
actually i had pin7 & 8 connected together, like on the infrared reciever in my other post.
i used the Mikro pascal USART library demo program

 

[Mike - K8LH]

You can also try pin 4 on the DB9 connector. I've noticed that some PC software doesn't set pin 7.

You can also probably connect the pull-up resistor to 5v on your PIC board. Most PC serial ports work fine with 5v for the "high" signal.

Happy Holidays. Mike

 

[williB]

yes +5V worked fine , you da man

 

[wowowee]

do you know how to connect the rs232a to a circuit that uses pic16f877? i have a circuit here but i dont know how to interface the rs232a in it.. can you help me?

 

[Nigel Goodwin]

As above, or check my PIC tutorials.

 

[williB]

When i connect the terminal program to my circuit and select decimal output
the adc output comes on the screen as decimal.
but when i save it to a file , i get strange characters?
will hyperterminal work better?

 

[Nigel Goodwin]

You need to send the data from the PIC as ASCII, not as plain HEX data.

 

[williB]

i can send it as text , but i'm not sure how to do that
below is a description of the write text procedure