Pic 12f675 - Rs232 - Electronic Circuits Projects Diagrams Free

pkvasan · 10th November 2008, 01:19 PM

Hi i am new to microcontroller and trying to learn PIC controllers, i have completed few examples as mentioned in book, like flashing LED's etc...

Iam stuck with one problem , i am trying to send "Hello" to PC via RS232,
i wanted to see "Hello" in my PC hyperterminal as soon as i power up my PIC board, I have followed all the connections as mentioned in book, i have used MAX232 for serial communication.

I am not able to see "Hello" in Hyperterminal. I even connected LED to PIN 14 of MAX232(T1Out , which is connected to pin 2 of 9 pin D Connector)LED is blinking but "Hello" does not appear on Hyperterminal

Please help me to find solution

Rgds

**Nigel Goodwin** · 10th November 2008, 01:25 PM

You might take a look at my PIC tutorials?.

The 12F675 uses the same 14 bit core as the 16F628.

eblc1388 · 10th November 2008, 03:03 PM

Quote:

Originally Posted by pkvasan

LED is blinking but "Hello" does not appear on Hyperterminal

Please help me to find solution

Rgds

Does gibberish (i.e. rubbish characters) appear on Hyperterminal?

If there is none, then you are having wiring connection problems. One cause is a crossed serial cable.

If there are rubbish characters appearing, then your PIC baudrate or Comm settings is probably wrong. This can be caused by bad UART register setup, wrong crystal frequency used or you have the incorrect OSCCAL factory calibrating value loaded if you're using internal oscillator.

pkvasan · 11th November 2008, 04:26 AM

I think there is some wiring problem, it worked once. if check the voltage level at PIN 14 of Max232 i am getting approx 5V continously but i can see any think in hyperterminal. is it only wiring problem or there is any problem in my PC. i checked config setting in hyperterminal and seems to be correct.

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10th November 2008, 01:19 PM	#1
pkvasan	Pic 12f675 - Rs232 Hi i am new to microcontroller and trying to learn PIC controllers, i have completed few examples as mentioned in book, like flashing LED's etc... Iam stuck with one problem , i am trying to send "Hello" to PC via RS232, i wanted to see "Hello" in my PC hyperterminal as soon as i power up my PIC board, I have followed all the connections as mentioned in book, i have used MAX232 for serial communication. I am not able to see "Hello" in Hyperterminal. I even connected LED to PIN 14 of MAX232(T1Out , which is connected to pin 2 of 9 pin D Connector)LED is blinking but "Hello" does not appear on Hyperterminal Please help me to find solution Rgds

10th November 2008, 01:25 PM	#2
Nigel Goodwin	You might take a look at my PIC tutorials?. The 12F675 uses the same 14 bit core as the 16F628. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

11th November 2008, 04:26 AM	#4
pkvasan	I think there is some wiring problem, it worked once. if check the voltage level at PIN 14 of Max232 i am getting approx 5V continously but i can see any think in hyperterminal. is it only wiring problem or there is any problem in my PC. i checked config setting in hyperterminal and seems to be correct.