support for firmware v 0.2, add ADC cal data

gex/units/ADC.py

@@ -10,6 +10,7 @@ import numpy as np
 
 CMD_READ_RAW = 0
 CMD_READ_SMOOTHED = 1
+CMD_READ_CAL_CONSTANTS = 2
 CMD_GET_ENABLED_CHANNELS = 10
 CMD_GET_SAMPLE_RATE = 11
 
@@ -40,6 +41,24 @@ class TriggerReport:
     def __str__(self):
         return "EventReport(edge %d, pretrig len %d, ts %d, data %s)" % (self.edge, self.pretrig, self.timestamp, self.data)
 
+class ADC_CalData:
+    def __init__(self, pp:gex.PayloadParser):
+        self.VREFINT_CAL = pp.u16() # ADC raw value for VREFINT, 30C ambient
+        self.VREFINT_CAL_VADCREF = pp.u16() # Analog reference voltage during VREFINT calibration (mV) +-10mV
+
+        self.TSENSE_CAL1 = pp.u16() # ADC raw value in point 1
+        self.TSENSE_CAL2 = pp.u16() # ADC raw value in point 2
+        self.TSENSE_CAL1_TEMP = pp.u8() # Temperature for point 1 (Celsius) +-5C
+        self.TSENSE_CAL2_TEMP = pp.u8() # Temperature for point 2 (Celsius) +-5C
+        self.TSENSE_CAL_VADCREF = pp.u16() # Analog reference voltage during TSENSE calibration (mV) +-10mV
+
+    def __str__(self):
+        return "ADC_CalData(VREFINT=%d at Vref=%d mV, TSENSE_%dC=%d, TSENSE_%dC=%d at Vref=%d mV)" % \
+               (self.VREFINT_CAL, self.VREFINT_CAL_VADCREF,
+                self.TSENSE_CAL1_TEMP, self.TSENSE_CAL1, self.TSENSE_CAL2_TEMP, self.TSENSE_CAL2, self.TSENSE_CAL_VADCREF)
+
+    # TODO utility for converting raw values to real voltage / temperature
+
 class ADC(gex.Unit):
     """
     ADC device
@@ -161,6 +180,13 @@ class ADC(gex.Unit):
         msg = self._query(CMD_GET_ENABLED_CHANNELS)
         return list(msg.data)
 
+    def get_calibration_data(self):
+        """
+        Read ADC calibration data
+        """
+        msg = self._query(CMD_READ_CAL_CONSTANTS)
+        return ADC_CalData(gex.PayloadParser(msg.data))
+
     def set_sample_rate(self, freq:int):
         """ Set sample rate in Hz. Returns the real achieved frequency as float. """
         pb = gex.PayloadBuilder()

nrf_config.ini

@@ -0,0 +1,86 @@
+## UNITS.INI
+## GEX v0.1.0 on STM32F072-HUB
+## built Mar 28 2018 at 00:42:03
+
+[UNITS]
+# Create units by adding their names next to a type (e.g. DO=A,B),
+# remove the same way. Reload to update the unit sections below.
+
+# Digital output
+DO=ce
+# Digital input with triggers
+DI=irq
+# Neopixel RGB LED strip
+NPX=
+# I2C master
+I2C=
+# SPI master
+SPI=spi
+# Serial port
+USART=
+# 1-Wire master
+1WIRE=
+# Analog/digital converter
+ADC=
+# Shift register driver (595, 4094)
+SIPO=
+# Frequency and pulse measurement
+FCAP=
+# Capacitive touch sensing
+TOUCH=
+# Simple PWM output
+PWMDIM=
+# Two-channel analog output with waveforms
+DAC=
+
+[DO:ce@2]
+# Port name
+port=B
+# Pins (comma separated, supports ranges)
+pins=6, 2
+# Initially high pins
+initial=
+# Open-drain pins
+open-drain=
+
+[DI:irq@3]
+# Port name
+port=B
+# Pins (comma separated, supports ranges)
+pins=8-7
+# Pins with pull-up
+pull-up=
+# Pins with pull-down
+pull-down=
+
+# Trigger pins activated by rising/falling edge
+trig-rise=
+trig-fall=
+# Trigger pins auto-armed by default
+auto-trigger=
+# Triggers hold-off time (ms)
+hold-off=100
+
+[SPI:spi@1]
+# Peripheral number (SPIx)
+device=1
+# Pin mappings (SCK,MISO,MOSI)
+#  SPI1: (0) A5,A6,A7     (1) B3,B4,B5
+#  SPI2: (0) B13,B14,B15
+remap=1
+
+# Prescaller: 2,4,8,...,256
+prescaller=64
+# Clock polarity: 0,1 (clock idle level)
+cpol=0
+# Clock phase: 0,1 (active edge, 0-first, 1-second)
+cpha=1
+# Transmit only, disable MISO
+tx-only=N
+# Bit order (LSB or MSB first)
+first-bit=MSB
+
+# SS port name
+port=B
+# SS pins (comma separated, supports ranges)
+pins=1-0

test_adc.py

@@ -8,9 +8,12 @@ from matplotlib import pyplot as plt
 from scipy.io import wavfile
 
 with gex.Client(gex.TrxRawUSB()) as client:
-    adc = gex.ADC(client, 'a')
+    adc = gex.ADC(client, 'adc')
 
-    adc.set_active_channels([3])
+    print(adc.get_calibration_data())
+    print(adc.get_channels())
+
+    adc.set_active_channels([1])
     rate=500
     fs = adc.set_sample_rate(rate)