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Hi All,
I'm doing some work with a PIC 12F675 (programming with a Melabs USB programmer) and accidently erased my calibration values for the internal oscillator. Is there a way to reprogram this? I'm using the standard "beta" software used to interface with the USB U2 programmer.
I know if you have another one you can look at the last address which is where it is stored. Then you can store that number in your's
Run a program and see how close it comes to your calculations and then adjust it.
Hmmm... how much Test Equipment, time and patience have you got???
(1) If you have a Frequency Counter, program for INTOSC CLKOUT and measure fosc/4 on the GPIO.4 OSCOUT pin. Adjust for 1MHz.
(2) If you don't have a frequency counter, SEROUT a Test Message at say 9600 baud to your PC. Keep adjusting the value until sensible data is reliably copied onto say your PC's Hyperterminal.
(3) Save yourself $500 worth of effort, spend $1 and buy yourself a new PIC.
4) IF you have 40 Bucks ... to spend.
Buy a Pickit2 ( or 3 ! with more bucks )
and just hit the " retrieve cal factor" button ...
for the money ... you get an excellent ICSP programmer ...
Alain
Oh Melanie,Quote:
(3) Save yourself $500 worth of effort, spend $1 and buy yourself a new PIC.
You and your quick whips are always good for a laugh... thank you