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i am using the pic 16f628.i would like to communicate with srf02 ultrasonic module.this module accepts only 9600 2 stop no parity.i can't find if i can choose to send with serout command with 2 stop bits.is it possible or i have to use the hardware usart?i am using pic basic pro v2.47
thanks
Correct me if I'm wrong, but isn't the stop bit a high bit, and doest the line idle high?
If that is the case, just adding a quick pause after the serout2 command should result in ensuring that the line stays high for a short time after the first stop bit is done.
thanks for your reply i will try it....
what baud rate are you using?
hi kamikaze47,
the baud rate is 9600.i check it in hyper terminal and working both tx and rx with stop bit 1. i can't understand how and why but it's working. i connected to my project and working also perfectly. i am using serout2 command.
thanks for your help.if anyone need sample code for srf02 tell me.
At 9600 baud, each bit is approx 104uS long, so a PAUSEUS 104 after your serout command should represent that 2nd stop bit.
I'm glad its working 4 u.
Adding
DEFINE CHAR_PACING 104 'Serout character pacing in us
will give you an extra 104 uSecs between characters - effectively giving you an extra stop bit at 9600 bps.
HTH
Brian
In hopes you are still monitoring this thread, Kamikaze, I would very much like to collaborate with you and receive a copy of your sample code for using the SRF02.Quote:
Originally Posted by santamaria
I am currently developing an application that will work with the SRF02. It uses a DS1337 clock's Alarm1 (INTA) as an interrupt to an 18F4550 MCU to wake it up out of SLEEP mode, take 6 range measurements from the SRF02, average the 6 measurements into a single average value, store it in EEPROM and go back to sleep till the next interrupt. Interrupts can be set according to DS1337 clock Alarm settings or a person could replace the clock interrupts with a push button interrupt to manually take measurements and display them.
If you could post your code here it would be a help to me and possibly to other members of this forum.
BTW, I see that you had some difficulties in using a serial interface with the SRF02. I am using I2C interface which seems a lot simpler. Curious....how come you chose to use the serial interface option as opposed to I2C??
i never used the srf02. I was just helping out santamaria with his serial problems.
But it sounds like you have a good idea about what you want to do. Why not give it a go. Were are you getting stuck?
Sorry about that, Kamikaze.Quote:
Originally Posted by santamaria
Santamaria, if you are out there, can you please answer my above post??
Thanks!