What is PWM for PIC32?
Pulse Width Modulation, or PWM, is a technique used to vary the average magnitude of a signal by changing its duty cycle (the proportion of time that a signal is active or “high”). For a more in-depth introduction to PWM motor control click here. PWM for PIC32 is discussed in more detail in the Microchip Output Compare documention.
How does the DMA module work with a PIC32?
The DMA module requires the actual physical address of the memory used, so we need to translate the pic32’s virtual memory address into a physical address, which is what virt_to_phys () does. The next thing you’ll not is we have to supply a “source” interrupt for the DMA transfers.
Why is the PIC32 microcontroller so slow?
The memory on the PIC32 is a bit slow and peripherals use various tricks, like caching or making their own copies of data, to get better speed. The problem with this is that two devices accessing the same area of memory can end up reading different values from the same memory location due to this.
How to use PWM in the operation mode?
For the operation mode, to use PWM one of the first two constants must be used. The output compare modules use either Timer 2 (default) or Timer 3. These must be set up using OpenTimerX function, where X is either 2 or 3. The period can be between 0 and 0xFFFF inclusive.
What is PWM (pulse width modulation)?
Pulse Width Modulation, or PWM, is a technique used to vary the average magnitude of a signal by changing its duty cycle (the proportion of time that a signal is active or “high”). For a more in-depth introduction to PWM motor control click here .
What are the pins available for PWM?
The pins available for PWM are 5 input pins (OC1, OC2, OC3, OC4, and OC5) and 2 output pins (OCFA and OCFB). The output pins are for fault pin protection. PWM can be set up by either changing directly the special function registers or using the functions in outcompare.h (a header file included in the peripheral library (plib.h).
