kersing wrote: ↑

Thu Feb 16, 2023 9:04 pm

To solve the numbers being to large you can use a loop to call delay repeatedly. If you have a minute spot on you can just loop the number of minutes you need.

But then don't use interrupts because a delay action will mess up the stack and the program will crash.

Interrupt is better - Simply have the interrupt setup for a specific timer based time, and each time the interrupt is called, increment your variable. In the main loop, simply look for a variable number larger than the time you need, and then set that variable to zero, and turn off your output. Your...

The input can't drop fast due to the input capacitance which has enough stored energy to run the regulator which keeps system 5volts until the input capacitor in depleted to around 7 volts. As you can see, my monitor voltage is derived from the 17V power. So the scenario you suggest is not possible....

My method of saving data at power down was to feed the supply DC voltage into an analog input and constantly poll the analog watching for a voltage below a limit value. Your smoothing capacitor will provide enough energy to allow your macro to run and save variables in eprom. I have posted the schem...

Hello - I do understand how the while loop works. Predominantly used if for a specific count value. I tried the "count using a variable" drop down box. That seems squirrely and does not do what I would inherently expect. However, selecting the "loop Count" check box and putting the variable name in ...

Perfect Ben. Just what I needed.

Hello - I'm putting a signal (sine wave zero crossing) on the interrupt input pin of the PIC18f2553. I'm driving a motor from AC and the drive is a triac. Works well. Normally, I like to store variables in Eeprom, and since I can't continuously write eprom values due to life, I store on power down. ...

Not ALL variables can be edited. I have noticed that a floating point variable is there to stay. The only way I could edit it (Change it to a non floater) was to delete and start over.

Simply set a flag in the interrupt, Then when you are out of the interrupt, look at the flag, and reset it, then perform your macro.

You might consider stepper motors since it moves in steps - A simple stepper will have 50 poles, and that would equate to 200 pulses per rev if you 1/4 stepped the windings. At that point, counting and providing pulses to each motor would keep them locked in phase. A top speed from a stepper motor i...