francis123
Member
I have a program running in a 28X1 picaxe and I would also like to keep track of the number of pulses input during a 10 sec interval from input 5 can I do this? Which command do I use?
How to use the timer function of a 28X1 ?
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francis123
Member
Yes that is the problem the program stops
doing another function while it waits the 10 seconds to count the number of pulses. Is there any way to have the count in the background while the program is running a program? Could I use a LM555 timer and have an input every 10 seconds and have an interrupt that increments a variable to keep track of the input pulses? What is the best way to do this?
Thanks again for your help.
doing another function while it waits the 10 seconds to count the number of pulses. Is there any way to have the count in the background while the program is running a program? Could I use a LM555 timer and have an input every 10 seconds and have an interrupt that increments a variable to keep track of the input pulses? What is the best way to do this?
Thanks again for your help.
It would be a good idea to be more precise about your "another function" as there may be a way to code it in. Depends.... ditto an external interrupt... depends on your code and your requirement.
Alternatively, it is possible to use some kind of counter chip and then read it every 10 seconds based on the 28X1 timer. Or use a second PICAXE (eg a low cost 08) and make a programmable counter.
Many things are possibley possible maybe. It depends on your exact requirements, which are currently a little vague. Sorry.
Generally, it's always best to clearly lay out the problem with a sort of flow chart or list, maybe some psuedo-code and a schematic of any circuit.
It takes the strain off our crystal balls
(which were a cheap bulk order from Ebay) and drip feeding information can turn a 2 page thread into 20 pages.
Alternatively, it is possible to use some kind of counter chip and then read it every 10 seconds based on the 28X1 timer. Or use a second PICAXE (eg a low cost 08) and make a programmable counter.
Many things are possibley possible maybe. It depends on your exact requirements, which are currently a little vague. Sorry.
Generally, it's always best to clearly lay out the problem with a sort of flow chart or list, maybe some psuedo-code and a schematic of any circuit.
It takes the strain off our crystal balls
(which were a cheap bulk order from Ebay) and drip feeding information can turn a 2 page thread into 20 pages.francis123
Member
Ok I didn't want to overuse this forum too much
the application is to build a brushless DC motor as a class project. I have a 3" dia. disk which has (2) North pole button magnets on the outside rim, opposite each other facing down. As the disk rotates they pass over a total of (3) fixed coils equal spaced which I am controlling with the Picaxe 28x, (or could use a 28x1 if have to) using the L293D to create a north or south pole to rotate the disk. I also have 3 hall effect sensors equally spaced inbetween the coils to sense the disks position. The objectives are to:
1) rotate the disk
2) calculate the disk rpm
3) display the rpm on an lcd serial display with updates every 10 seconds
Ok thanks again for your help.
Francis
the application is to build a brushless DC motor as a class project. I have a 3" dia. disk which has (2) North pole button magnets on the outside rim, opposite each other facing down. As the disk rotates they pass over a total of (3) fixed coils equal spaced which I am controlling with the Picaxe 28x, (or could use a 28x1 if have to) using the L293D to create a north or south pole to rotate the disk. I also have 3 hall effect sensors equally spaced inbetween the coils to sense the disks position. The objectives are to:
1) rotate the disk
2) calculate the disk rpm
3) display the rpm on an lcd serial display with updates every 10 seconds
Ok thanks again for your help.
Francis
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