Hi, I would like to start working with the quadrature encoder hardware in the DUE. It appears you can use the pins TIOA0, TIOB0 and TIOA1 to decode 2 channel quadrature plus an index. (SAM3X manual p. 855) If my reading of the pinout is correct, this would be pins 2, 13 and AD7. Could someone poin…

@fiddler : All three QDEC pins are on a connector, the pinout is as dreschel wrote @dreschel: I came to the same point like you and nothing further :frowning: This is a header file from Keil, it defines allot of registers and peripheral base adresses: http://www.keil.com/dd/docs/arm/atmel/sam3x/s…

It seems that this file \hardware\arduino\sam\system\CMSIS\Device\ATMEL\sam3xa\include\component\component_tc.h present the same information.

thats great news :slight_smile: I also found it in "Contents/Resources/Java/hardware/arduino/sam/system/CMSIS/Device/ATMEL/sam3xa/include/component/components_tc.h" I am trying to figure out how to include all necessary files with all the typedefs and stuff to not get compiling errors

I'm currently working my self through the datasheet and the Timer/Counter relating header and source files and I think I'm almost there :slight_smile: But: which T/C channel should I use to not generate conflicts with a PWM output or any other peripheral. Does any one know which channels are alrea…

I got the hardware quadrature encoder running partially... Using the following code and a motor with a 2 trace quadrature encoder I manage to make the REG_TC0_CV0 register measure the position of the motor. To use the hardware quadrature encoder the two traces need to be connected to digital pins 2…

anyone ideas that could explain this behaviour? maybe the quadrature encoder is not build to evaluate all slopes (which would be kinda stupid)? But possible until proven otherwise I guess? Shouldn't the datasheet shed light on how it responds to the four transitions of each encoder step is handle…

I checked, but I couldn't find a clear statement. In Figure 37-15 the wire going out the Quadrature Decoder block is labeled "PHEdges" (and not particularly PHAEdges or PHBedges, they name the quadrature signals PHA and PHB in the datasheet), which kind of makes me think there should be edges on bot…

just solved the problem.. the EDGPHA bit in the TC_BMR register controls whether the edges are detected on both PHA and PHB or just on PHA. I had this bit set to 0 before which according to the datasheet was the good choice. ("0: edges are detected on both PHA and PHB. 1: edges are detected on PHA …

so for us dummies, does this code print the accumulated count from quadrature input on digital pins 2 and 13? not too good at complicated datasheets. also, are there only two pins that can be used as quadrature input and are they D2 and D13? i have a TFT shield that is wired to pin 2 among many othe…

Using the Hardware Quadrature Encoder Channel on the DUE

Official Hardware Mega Due

fiddler January 10, 2013, 6:58pm 2

dreschel

Did you get the encoder to work ?
It appear that only 1 of the the 2 Quadrature channels pins have been connected to pins.

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Using the Hardware Quadrature Encoder Channel on the DUE

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