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demo_quadEncWBtn.spin2
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demo_quadEncWBtn.spin2
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'' =================================================================================================
''
'' File....... demo_quadEncWBtn.spin2
'' Purpose.... Demonstrate Basic quad encoder behavior
'' Authors.... Stephen M Moraco
'' -- Copyright (c) 2023 Iron Sheep Productions, LLC
'' -- see below for terms of use
'' E-mail..... stephen@ironsheep.biz
'' Started.... May 2023
'' Updated.... 12 May 2023
''
'' =================================================================================================
CON { timing }
CLK_FREQ = 270_000_000 ' system freq as a constant
_clkfreq = CLK_FREQ ' set system clock
CON { fixed io pins }
RX1 = 63 { I } ' programming / debug
TX1 = 62 { O }
SF_CS = 61 { O } ' serial flash
SF_SCK = 60 { O }
SF_SDO = 59 { O }
SF_SDI = 58 { I }
CON { application io pins }
' NOTE: pins 24 & 25 also use 26 & 27 to determine rate of rotation
QUAD_ENC_CLK = 26 { I }
QUAD_ENC_DAT = 27 { I }
QUAD_ENC_BTN = 28 { I }
SRVO_OFST_RANGE = 750 ' NOTE customize this to adjut servo range span
SRVO_OFST_CNTR = 1500
SRVO_OFST_MIN = SRVO_OFST_CNTR - SRVO_OFST_RANGE
SRVO_OFST_MAX = SRVO_OFST_CNTR + SRVO_OFST_RANGE
SRVO_PULSE_WIDTH_MS = 50 ' pulse width in milliSeconds
' multiply the runtime-determined spin rate of the encoder knob
ENC_RATE_SCALE = 4 ' 2 = 5 turns end-to-end, 4 = 3 turns end-to-end
OBJ
quadEnc : "isp_quadEncWBtn_sp"
DAT
priorPosition LONG -1
deltaPosition LONG -1
desiredOffset LONG 0
PUB main() | currPosn, currRate, tmpOffset
quadEnc.start(QUAD_ENC_CLK, QUAD_ENC_DAT, QUAD_ENC_BTN)
repeat
if quadEnc.isButtonPressed()
debug("* Button Pressed")
currPosn, currRate := quadEnc.positionRate()
if currPosn <> priorPosition
deltaPosition := currPosn - priorPosition
priorPosition := currPosn
debug("* Rotary Encoder at ", sdec_(currPosn), ", delta ", sdec_(deltaPosition))
tmpOffset := desiredOffset + (deltaPosition * currRate * 4)
desiredOffset := SRVO_OFST_MIN #> tmpOffset <# SRVO_OFST_MAX
debug("* ----- ", sdec_(desiredOffset), " -----")
debug(" ")
waitms(250)
CON { license }
{{
-------------------------------------------------------------------------------------------------
MIT License
Copyright (c) 2023 Iron Sheep Productions, LLC
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
=================================================================================================
}}