Not really following all your calcs. I have a PIC18F4620, 40Mhz HSPLL, my interrupt frequency is 2500 uS. /* Initialize TRM0 (in T0CON) */ TMR0ON = 1; /* Timer0 1 = on */ T08BIT = 1; /* Timer0 8 bit = 1 */ T0CS = 0; /* Timer0 0= internal clock, 1= T0CKI pin */ T0SE = 0; /* Timer0 1=inc on H to L tra...

Interesting topic for me, as I'm working with I2C on my 'bot. We probably need more data to help you any. What language, C? Might need to see schematic. Are there data and clock line pull-ups on the I2C? Alan KM6VV Hi I have some hardware that is containing 2 pics 18f9722 acting as master / slave An...

Hi Roger, That's the same thing, I've just used a slightly shorter version. I don't know enough of your program to advise on the int vs long problem. Are you changing types? Perhaps you need a cast (int) to manage it. Another possibility is the addressing of the EEPROM. int pointers will automatical...

Try: Alan KM6VV

I have another board, I’m going to test it there. But I need a REASON it’s failing on this board. I had a ‘scope on the I2C lines which were supposed to be in idle, and once each second I thought I saw a jump. I have a “heart beat” LED that flashes 1/sec, and some tasks (such as sending out logging ...

Any new info on this problem? I'm using an 18F4620 and High-Tech C compiler, and my application is to read an ultrasonic ranger (SRF08) for a robot. After about 4-6 minutes, the test looking for SEN low times out, first infrequently, and then solidly. (I have timeout code, and the routine is not all...