From 789659599cc711d9b45adf73dbd0cd66731a045c Mon Sep 17 00:00:00 2001 From: Geoff Shannon Date: Thu, 10 Oct 2019 17:11:34 -0700 Subject: [PATCH] adc_temperature: add support for AD849x thermocouple amplifiers (#1994) Signed-off-by: Geoff Shannon --- config/example-extras.cfg | 18 +++++++ klippy/extras/adc_temperature.py | 88 +++++++++++++++++++++++++++++++- 2 files changed, 104 insertions(+), 2 deletions(-) diff --git a/config/example-extras.cfg b/config/example-extras.cfg index c595bafd..feba2a38 100644 --- a/config/example-extras.cfg +++ b/config/example-extras.cfg @@ -835,6 +835,24 @@ # pullup_resistor parameter (see example.cfg for details). At least # two measurements must be provided. +# AD849x series thermocouple amplifier temperature sensors. The +# following parameters are available in heater sections that use one +# of these sensor types. +#[extruder] +# See the "extruder" section in example.cfg for a description of +# heater parameters. The parameters below describe sensor parameters. +#sensor_type: +# One of "AD8494", "AD8495", "AD8496", "AD8497" +#adc_voltage: +# The reference voltage for the ADC pin specified for +# sensor_pin. This parameter is required. +#sensor_pin: +# The ADC pin the AD849x device is connected to. This parameter is +# required. +#voltage_offset: +# The voltage applied to the REF pin on the AD849x device being +# used. The default is 0. + # MAXxxxxx serial peripheral interface (SPI) temperature based # sensors. The following parameters are available in heater sections # that use one of these sensor types. diff --git a/klippy/extras/adc_temperature.py b/klippy/extras/adc_temperature.py index 7f8b0f46..2e333792 100644 --- a/klippy/extras/adc_temperature.py +++ b/klippy/extras/adc_temperature.py @@ -88,9 +88,10 @@ class LinearInterpolate: class LinearVoltage: def __init__(self, config, params): adc_voltage = config.getfloat('adc_voltage', 5., above=0.) + voltage_offset = config.getfloat('voltage_offset', 0.0) samples = [] for temp, volt in params: - adc = volt / adc_voltage + adc = (volt - voltage_offset) / adc_voltage if adc < 0. or adc > 1.: logging.warn("Ignoring adc sample %.3f/%.3f in heater %s", temp, volt, config.get_name()) @@ -172,6 +173,84 @@ AD595 = [ (420., 4.266), (440., 4.476), (460., 4.686), (480., 4.896) ] + +AD8494 = [ + (-180, -0.714), (-160, -0.658), (-140, -0.594), (-120, -0.523), + (-100, -0.446), (-80, -0.365), (-60, -0.278), (-40, -0.188), + (-20, -0.095), (0, 0.002), (20, 0.1), (25, 0.125), (40, 0.201), + (60, 0.303), (80, 0.406), (100, 0.511), (120, 0.617), (140, 0.723), + (160, 0.829), (180, 0.937), (200, 1.044), (220, 1.151), (240, 1.259), + (260, 1.366), (280, 1.473), (300, 1.58), (320, 1.687), (340, 1.794), + (360, 1.901), (380, 2.008), (400, 2.114), (420, 2.221), (440, 2.328), + (460, 2.435), (480, 2.542), (500, 2.65), (520, 2.759), (540, 2.868), + (560, 2.979), (580, 3.09), (600, 3.203), (620, 3.316), (640, 3.431), + (660, 3.548), (680, 3.666), (700, 3.786), (720, 3.906), (740, 4.029), + (760, 4.152), (780, 4.276), (800, 4.401), (820, 4.526), (840, 4.65), + (860, 4.774), (880, 4.897), (900, 5.018), (920, 5.138), (940, 5.257), + (960, 5.374), (980, 5.49), (1000, 5.606), (1020, 5.72), (1040, 5.833), + (1060, 5.946), (1080, 6.058), (1100, 6.17), (1120, 6.282), (1140, 6.394), + (1160, 6.505), (1180, 6.616), (1200, 6.727) +] + +AD8495 = [ + (-260, -0.786), (-240, -0.774), (-220, -0.751), (-200, -0.719), + (-180, -0.677), (-160, -0.627), (-140, -0.569), (-120, -0.504), + (-100, -0.432), (-80, -0.355), (-60, -0.272), (-40, -0.184), (-20, -0.093), + (0, 0.003), (20, 0.1), (25, 0.125), (40, 0.2), (60, 0.301), (80, 0.402), + (100, 0.504), (120, 0.605), (140, 0.705), (160, 0.803), (180, 0.901), + (200, 0.999), (220, 1.097), (240, 1.196), (260, 1.295), (280, 1.396), + (300, 1.497), (320, 1.599), (340, 1.701), (360, 1.803), (380, 1.906), + (400, 2.01), (420, 2.113), (440, 2.217), (460, 2.321), (480, 2.425), + (500, 2.529), (520, 2.634), (540, 2.738), (560, 2.843), (580, 2.947), + (600, 3.051), (620, 3.155), (640, 3.259), (660, 3.362), (680, 3.465), + (700, 3.568), (720, 3.67), (740, 3.772), (760, 3.874), (780, 3.975), + (800, 4.076), (820, 4.176), (840, 4.275), (860, 4.374), (880, 4.473), + (900, 4.571), (920, 4.669), (940, 4.766), (960, 4.863), (980, 4.959), + (1000, 5.055), (1020, 5.15), (1040, 5.245), (1060, 5.339), (1080, 5.432), + (1100, 5.525), (1120, 5.617), (1140, 5.709), (1160, 5.8), (1180, 5.891), + (1200, 5.98), (1220, 6.069), (1240, 6.158), (1260, 6.245), (1280, 6.332), + (1300, 6.418), (1320, 6.503), (1340, 6.587), (1360, 6.671), (1380, 6.754) +] + +AD8496 = [ + (-180, -0.642), (-160, -0.59), (-140, -0.53), (-120, -0.464), + (-100, -0.392), (-80, -0.315), (-60, -0.235), (-40, -0.15), (-20, -0.063), + (0, 0.027), (20, 0.119), (25, 0.142), (40, 0.213), (60, 0.308), + (80, 0.405), (100, 0.503), (120, 0.601), (140, 0.701), (160, 0.8), + (180, 0.9), (200, 1.001), (220, 1.101), (240, 1.201), (260, 1.302), + (280, 1.402), (300, 1.502), (320, 1.602), (340, 1.702), (360, 1.801), + (380, 1.901), (400, 2.001), (420, 2.1), (440, 2.2), (460, 2.3), + (480, 2.401), (500, 2.502), (520, 2.603), (540, 2.705), (560, 2.808), + (580, 2.912), (600, 3.017), (620, 3.124), (640, 3.231), (660, 3.34), + (680, 3.451), (700, 3.562), (720, 3.675), (740, 3.789), (760, 3.904), + (780, 4.02), (800, 4.137), (820, 4.254), (840, 4.37), (860, 4.486), + (880, 4.6), (900, 4.714), (920, 4.826), (940, 4.937), (960, 5.047), + (980, 5.155), (1000, 5.263), (1020, 5.369), (1040, 5.475), (1060, 5.581), + (1080, 5.686), (1100, 5.79), (1120, 5.895), (1140, 5.999), (1160, 6.103), + (1180, 6.207), (1200, 6.311) +] + +AD8497 = [ + (-260, -0.785), (-240, -0.773), (-220, -0.751), (-200, -0.718), + (-180, -0.676), (-160, -0.626), (-140, -0.568), (-120, -0.503), + (-100, -0.432), (-80, -0.354), (-60, -0.271), (-40, -0.184), + (-20, -0.092), (0, 0.003), (20, 0.101), (25, 0.126), (40, 0.2), + (60, 0.301), (80, 0.403), (100, 0.505), (120, 0.605), (140, 0.705), + (160, 0.804), (180, 0.902), (200, 0.999), (220, 1.097), (240, 1.196), + (260, 1.296), (280, 1.396), (300, 1.498), (320, 1.599), (340, 1.701), + (360, 1.804), (380, 1.907), (400, 2.01), (420, 2.114), (440, 2.218), + (460, 2.322), (480, 2.426), (500, 2.53), (520, 2.634), (540, 2.739), + (560, 2.843), (580, 2.948), (600, 3.052), (620, 3.156), (640, 3.259), + (660, 3.363), (680, 3.466), (700, 3.569), (720, 3.671), (740, 3.773), + (760, 3.874), (780, 3.976), (800, 4.076), (820, 4.176), (840, 4.276), + (860, 4.375), (880, 4.474), (900, 4.572), (920, 4.67), (940, 4.767), + (960, 4.863), (980, 4.96), (1000, 5.055), (1020, 5.151), (1040, 5.245), + (1060, 5.339), (1080, 5.433), (1100, 5.526), (1120, 5.618), (1140, 5.71), + (1160, 5.801), (1180, 5.891), (1200, 5.981), (1220, 6.07), (1240, 6.158), + (1260, 6.246), (1280, 6.332), (1300, 6.418), (1320, 6.503), (1340, 6.588), + (1360, 6.671), (1380, 6.754) +] + PT100 = [ (0, 0.00), (1, 1.11), (10, 1.15), (20, 1.20), (30, 1.24), (40, 1.28), (50, 1.32), (60, 1.36), (70, 1.40), (80, 1.44), (90, 1.48), (100, 1.52), @@ -188,7 +267,12 @@ PT100 = [ def load_config(config): # Register default sensors pheater = config.get_printer().lookup_object("heater") - for sensor_type, params in [("AD595", AD595), ("PT100 INA826", PT100)]: + for sensor_type, params in [("AD595", AD595), + ("AD8494", AD8494), + ("AD8495", AD8495), + ("AD8496", AD8496), + ("AD8497", AD8497), + ("PT100 INA826", PT100)]: func = (lambda config, params=params: PrinterADCtoTemperature(config, LinearVoltage(config, params))) pheater.add_sensor_factory(sensor_type, func)