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LDmicro Forum - High speed counter |
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High speed counter (by Kumar)
Dear John,
Kumar here. Does your compiler support high speed counter, something like in the range up to 37kHz?. For your knowledge, i'm planning to use 16F628A. Please reply.Thanks.
(no subject) (by David R)
NO,
I used A cd4040 binary counter and interface it to the pic using the 12 binary pins and the reset, then use bin to dec conversion in the pic to get the count. but disable the count into the 4040 when taking the reading as the binary can change faster than the scan time of the PIC. Regards David.
(no subject) (by Kumar)
Dear David,
Kumar here, Thanks for the reply. So, i will go ahead with your advice.
(no subject) (by BoumPower)
You couln't use a timer and manipulate them from ladder logic ?
I have similare difficulties, so I'm writing a VM for PIC (or other CPU) that handle "interpretable byte code" What do you wont doing with this counter ?
(no subject) (by Kumar)
I'm planning to use this high speed counter for measurement of motor rotation, which the high speed pulses will come from the motor encoder.
(no subject) (by BoumPower)
Ok...
You have the same problem as me... I will use ladder logic to handle some process and in the same time controling DC brushless motor. Do do that, I'm writing a new ladder compiler that produce VM code more efficient. After, I will write a VM machine (for PIC16 and PIC18) that interpret VM code in a task, I will use cooperative multi-tasking) for a great part of my software and an interrupt routine to manage the motor (brushless without hall sensor, position is derived from back induction in coil) I plan to delocate VM code in a external I2C EEprom or use program flash memory if I have enough space. You can use timer hardware from pic to count your pulses,
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