Pi4J PWM control - Raspberry Pi Forums

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i'm made drawing machine controlled raspberry pi. moves pen around board 2 stepper motors , servo acting pen lift. works apart 1 little problem servo.

could't desired hardware generated pwm signals using pi4j don't think bits need exposed. ended writing own software pwm generator works well.

http://www.raspberrypi.org/phpbb3/viewtopic.php?t=50658

problem when os in background see following things happen:

- motors slow down. not problem, take longer steps.
- servo gets signal slow! disaster when ask pen up, not!!!

answer dump software pwm generator , tap hardware generated signals never scuppered background os tasks.

has managed java or need start reading data sheets bcm2835?

thanks

pi4j wrapper around c library. 1 solution put wrapper around c library such pigpio supports hardware timed pwm.


raspberrypi



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