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0.3.3 MCP4725
This commit is contained in:
rob tillaart
parent
f0b8e6ecfe
commit
d44d7e680e
@ -2,6 +2,10 @@ compile:
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# Choosing to run compilation tests on 2 different Arduino platforms
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platforms:
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- uno
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- leonardo
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- due
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- zero
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# - due
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# - zero
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# - leonardo
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- m4
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- esp32
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# - esp8266
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# - mega2560
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@ -4,10 +4,14 @@ name: Arduino CI
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on: [push, pull_request]
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jobs:
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arduino_ci:
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runTest:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v2
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- uses: Arduino-CI/action@master
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# Arduino-CI/action@v0.1.1
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- uses: ruby/setup-ruby@v1
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with:
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ruby-version: 2.6
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- run: |
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gem install arduino_ci
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arduino_ci.rb
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@ -1,6 +1,6 @@
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MIT License
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Copyright (c) 2013-2021 Rob Tillaart
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Copyright (c) 2013-2022 Rob Tillaart
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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@ -2,7 +2,7 @@
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// FILE: MCP4725.cpp
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// AUTHOR: Rob Tillaart
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// PURPOSE: Arduino library for 12 bit I2C DAC - MCP4725
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// VERSION: 0.3.2
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// VERSION: 0.3.3
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// URL: https://github.com/RobTillaart/MCP4725
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//
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// HISTORY:
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@ -21,10 +21,11 @@
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// 0.2.1 2020-07-04 Add yield(); add getLastWriteEEPROM();
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// update readme.md + keywords.txt
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// 0.2.2 2020-07-05 add get/setPercentage();
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// 0.2.3 2020-12-26 arduino-CI, bool isConnected(), bool begin()
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// 0.2.3 2020-12-26 Arduino-CI, bool isConnected(), bool begin()
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// 0.3.0 2021-01-15 Add WireN support (e.g. teensy)
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// 0.3.1 2021-05-27 Fix arduino-CI / arduino-lint
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// 0.3.1 2021-05-27 Fix Arduino-CI / Arduino-lint
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// 0.3.2 2021-06-06 Verify input of setPercentage()
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// 0.3.3 2021-12-21 update library.json, license, minor edits
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#include "MCP4725.h"
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@ -104,14 +105,13 @@ uint16_t MCP4725::getValue()
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}
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int MCP4725::setPercentage(float perc)
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int MCP4725::setPercentage(float percentage)
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{
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if ((perc > 100) || (perc < 0)) return MCP4725_VALUE_ERROR;
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return setValue(round(perc * (0.01 * MCP4725_MAXVALUE)));
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if ((percentage > 100) || (percentage < 0)) return MCP4725_VALUE_ERROR;
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return setValue(round(percentage * (0.01 * MCP4725_MAXVALUE)));
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}
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// unfortunately it is not possible to write a different value
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// to the DAC and EEPROM simultaneously or write EEPROM only.
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int MCP4725::writeDAC(const uint16_t value, const bool EEPROM)
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@ -153,7 +153,7 @@ uint16_t MCP4725::readEEPROM()
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// (true) DAC & EEPROM,
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int MCP4725::writePowerDownMode(const uint8_t PDM, const bool EEPROM)
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{
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_powerDownMode = (PDM & 0x03); // mask pdm bits only (written later low level)
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_powerDownMode = (PDM & 0x03); // mask PDM bits only (written later low level)
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return writeDAC(_lastValue, EEPROM);
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}
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@ -190,7 +190,7 @@ int MCP4725::powerOnReset()
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// PAGE 22 - experimental
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// _powerDownMode DAC resets to 0 -- pdm EEPROM stays same !!!
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// _powerDownMode DAC resets to 0 -- PDM EEPROM stays same !!!
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// need to reflect this in cached value
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int MCP4725::powerOnWakeUp()
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{
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@ -270,4 +270,6 @@ int MCP4725::_generalCall(const uint8_t gc)
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return _wire->endTransmission();
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}
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// -- END OF FILE --
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@ -3,7 +3,7 @@
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// FILE: MCP4725.h
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// AUTHOR: Rob Tillaart
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// PURPOSE: Arduino library for 12 bit I2C DAC - MCP4725
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// VERSION: 0.3.2
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// VERSION: 0.3.3
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// URL: https://github.com/RobTillaart/MCP4725
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//
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@ -12,7 +12,7 @@
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#include "Arduino.h"
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#define MCP4725_VERSION (F("0.3.2"))
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#define MCP4725_VERSION (F("0.3.3"))
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// constants
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@ -52,12 +52,12 @@ public:
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// 0..100.0% - no input check.
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int setPercentage(float perc = 0);
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int setPercentage(float percentage = 0);
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float getPercentage() { return getValue() * (100.0 / MCP4725_MAXVALUE); };
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int writeDAC(const uint16_t value, const bool EEPROM = false);
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// RDY isdepreciated in the future, use ready() instead.
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// RDY is depreciated in the future, use ready() instead.
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// inline bool RDY() { return ready(); };
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bool ready();
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uint32_t getLastWriteEEPROM() { return _lastWriteEEPROM; };
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@ -88,4 +88,6 @@ private:
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TwoWire* _wire;
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};
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// -- END OF FILE --
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@ -1,17 +1,21 @@
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[](https://github.com/marketplace/actions/arduino_ci)
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[](https://github.com/RobTillaart/MCP4725/actions/workflows/arduino-lint.yml)
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[](https://github.com/RobTillaart/MCP4725/actions/workflows/jsoncheck.yml)
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[](https://github.com/RobTillaart/MCP4725/blob/master/LICENSE)
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[](https://github.com/RobTillaart/MCP4725/releases)
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# MCP4725
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Arduino library for 12 bit I2C DAC - MCP4725
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Arduino library for 12 bit I2C DAC - MCP4725.
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## Description
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The MCP4725 is an I2C 12 bit Digital to Analog Converter (DAC). It is possible to have
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up to 8 MCP4725 on one bus. The MCP4725 supports 100KHz 400KHz and 3.4MHz bus speeds.
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The MCP4725 is an I2C 12 bit Digital to Analog Converter (DAC).
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It is possible to have up to 8 MCP4725 on one I2C bus.
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The MCP4725 supports 100 KHz 400 KHz and 3.4 MHz bus speeds.
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The output of the MCP4725 depends on the voltage supplied, which is in the range
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of 2.7V .. 5.5V. Check datasheet for the details.
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@ -21,32 +25,36 @@ of 2.7V .. 5.5V. Check datasheet for the details.
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### Constructor
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- **MCP4725(deviceAddress, TwoWire \*wire = &Wire);)** Constructor, needs I2C address, optional set Wire bus
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- **begin(dataPin, clockPin)** for ESP32. Returns true if connected.
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- **begin()** for UNO and other boards with hard wired I2C pins. Returns true if connected.
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Only suppport for Wire so not for Wire1 or Wire2 etc
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- **isConnected()** returns true if device (address) can be seen on the I2C bus.
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- **MCP4725(uint8_t deviceAddress, TwoWire \*wire = &Wire)** Constructor, needs I2C address, optional set Wire bus
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- **bool begin(uint8_t dataPin, uint8_t clockPin)** for ESP32. Returns true if connected.
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- **bool begin()** for UNO and other boards with hard wired I2C pins.
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Returns true if deviceAddress can be found on the I2C bus.
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- **bool isConnected()** returns true if device (address) can be seen on the I2C bus.
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### base
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- **setValue(value)** value = 0 .. 4095
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- **int setValue(uint16_t value = 0)** value = 0 .. 4095.
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Uses writeFastMode and does not write to EEPROM.
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Therfore it does not update the lastWriteEEPROM timestamp.
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- **getValue()** returns last value set from cache, this is much faster than readDAC().
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This latter gives the real value from the MCP4725. A difference can be caused by power
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outage a reset etc.
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- **setPercentage(perc)** perc = 0..100.0% Convenience wrapper around setValue().
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- **getPercentage()** returns percentage. Wrapper around getValue().
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- **writeDAC(value, const bool EEPROM = false)** Writes to DAC and conditionally to EEPROM.
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This latter is for startup / reset behavior. Check datasheet for the detail behavior.
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- **ready()** returns true if a new value can be written to the MCP4725.
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Therefore it does not update the lastWriteEEPROM timestamp.
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The default value is 0.
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Returns 0 on success
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- **uint16_t getValue()** returns last value set from cache, this is much faster than readDAC().
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This latter gives the real value from the MCP4725.
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Note: a difference can be caused by power outage a reset etc.
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- **int setPercentage(float percentage)** percentage = 0..100.0%.
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Convenience wrapper around setValue().
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- **float getPercentage()** returns percentage. Wrapper around getValue().
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- **int writeDAC(value, bool EEPROM = false)** Writes to DAC and conditionally to EEPROM.
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This latter is for startup / reset behaviour. Check datasheet for the detail behaviour.
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- **bool ready()** returns true if a new value can be written to the MCP4725.
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Return false if recently was written to EEPROM.
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- **readDAC()** reads the current value set in the MCP4725.
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- **readEEPROM()** reads the current value in the EEPROM of the MCP4725.
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- **getLastWriteEEPROM()** returns time in millis() when last value was written to EEPROM.
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- **uint16_t readDAC()** reads the current value set in the MCP4725.
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- **uint16_t readEEPROM()** reads the current value in the EEPROM of the MCP4725.
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- **uint32_t getLastWriteEEPROM()** returns time in millis() when last value was written to EEPROM.
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Page 3 of datasheet states it takes **25 - 50 ms** before values are written to EEPROM.
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So the exact timing of a sensor can differ a lot.
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So the exact timing of a sensor can differ quite a lot.
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When writing to EEPROM with **writeDAC()** one should check it is at least 50 ms ago.
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If one know the specific timing of a sensor one can tune this or even make it adaptive.
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@ -55,11 +63,11 @@ If one know the specific timing of a sensor one can tune this or even make it ad
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Check datasheet for these functions, (not tested enough yet).
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- **writePowerDownMode(PDM, const bool EEPROM = false)**
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- **readPowerDownModeEEPROM()**
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- **readPowerDownModeDAC()**
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- **powerOnReset()**
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- **powerOnWakeUp()**
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- **int writePowerDownMode(uint8_t PDM, bool EEPROM = false)**
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- **uint8_t readPowerDownModeEEPROM()**
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- **uint8_t readPowerDownModeDAC()**
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- **int powerOnReset()**
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- **int powerOnWakeUp()**
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More investigations needed for:
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- Writing to EEPROM, **ready()** and **getLastWriteEEPROM()**
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@ -95,3 +103,14 @@ It has 4 channels per chip (no experience /library yet)
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## Operation
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See examples
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## Future
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- update documentation
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- test the powerDown modes / functions.
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- write a sketch to measure the **writeDac()** timing if possible.
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- extend unit tests
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-
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@ -1,7 +1,6 @@
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//
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// FILE: MCP4725_wave_generator.ino
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.0
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// PURPOSE: demo function generators
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// DATE: 2021-01-07
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// URL: https://github.com/RobTillaart/FunctionGenerator
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@ -10,10 +9,11 @@
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// other signals are less difficult so have a slightly larger range.
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//
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// PLATFORM SINUS SQUARE SAWTOOTH TRIANGLE
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// UNO -100 Hz
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// UNO -100 Hz
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// ESP32 -200 Hz -1000 -250 -100
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//
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#include "MCP4725.h"
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#include "Wire.h"
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@ -171,4 +171,6 @@ void loop()
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{
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}
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// END OF FILE
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// -- END OF FILE --
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@ -1,13 +1,12 @@
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//
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// FILE: mcp4725_isConnected.ino
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.0
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// PURPOSE: test mcp4725 lib
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// DATE: 2020-12-26
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// URL: https://github.com/RobTillaart/MCP4725
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//
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// test to see behaviour when sensor is not connected and reconnected again. E.g. loose wires..
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// test to see behavior when sensor is not connected and reconnected again. E.g. loose wires..
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#include "Wire.h"
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#include "MCP4725.h"
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@ -16,6 +15,7 @@ MCP4725 MCP(0x62); // 0x62 or 0x63
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bool connected = false;
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void setup()
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{
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Serial.begin(115200);
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@ -31,6 +31,7 @@ void setup()
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Serial.println("end of setup()");
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}
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void loop()
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{
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if (!connected && MCP.isConnected())
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@ -47,5 +48,5 @@ void loop()
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}
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// -- END OF FILE --
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@ -1,12 +1,10 @@
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//
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// FILE: MCP4725_keypad.ino
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// AUTHOR: Rob Tillaart
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// VERSION: 0.2.0
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// PURPOSE: test MCP4725 lib
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// DATE: 2019-10-16
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// URL: https://github.com/RobTillaart/MCP4725
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//
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// Note: possible to replace I2CKeypad with Serial code
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@ -23,6 +21,7 @@ I2CKeyPad keyPad(KEYPAD_ADDR);
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uint32_t value = 0;
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uint32_t oldValue = 0;
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void setup()
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{
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Serial.begin(115200);
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@ -35,6 +34,7 @@ void setup()
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keyPad.begin();
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}
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void loop()
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{
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char c = updateKeyPadValue(value, 4095);
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@ -81,4 +81,6 @@ char updateKeyPadValue(uint32_t &value, uint32_t maxValue)
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return c;
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}
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// -- END OF FILE --
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@ -1,11 +1,10 @@
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//
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// FILE: mcp4725_test.ino
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.5
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// PURPOSE: test mcp4725 lib
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// DATE: 2013-11-24
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// URL: https://github.com/RobTillaart/MCP4725
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//
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#include "Wire.h"
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#include "MCP4725.h"
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@ -15,6 +14,7 @@ MCP4725 MCP(0x62); // 0x62 or 0x63
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volatile int x;
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uint32_t start, stop;
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void setup()
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{
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Serial.begin(115200);
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@ -31,6 +31,7 @@ void setup()
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test6();
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}
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void test1()
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{
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Serial.print("\nValue:\t");
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@ -49,6 +50,7 @@ void test1()
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Serial.println();
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}
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void test2()
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{
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Serial.println("\n\nMCP4725_II\n\n");
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@ -88,6 +90,7 @@ void test2()
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Serial.println();
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}
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void test3()
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{
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Serial.println("\n\nMCP4725_POWERDOWNMODE\n\n");
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@ -134,6 +137,7 @@ void test3()
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Serial.println();
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}
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void test4()
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{
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Serial.println("\n\nEXPERIMENTAL");
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@ -168,6 +172,7 @@ void test4()
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Serial.println();
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}
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void test5()
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{
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Serial.println("\n\nPERFORMANCE");
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@ -245,6 +250,7 @@ void test5()
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Serial.println(stop - start);
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}
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void test6()
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{
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Serial.println("\n\nEXPERIMENTAL II");
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@ -279,6 +285,7 @@ void test6()
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Serial.print("\nDone... (start triangle mode)");
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}
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void loop()
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{
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for (uint16_t i = 0; i < 4096; i++)
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@ -293,4 +300,6 @@ void loop()
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}
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}
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// -- END OF FILE --
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@ -1,17 +1,17 @@
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//
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// FILE: smooth2Value.ino
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.1
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// PURPOSE: test mcp4725 lib
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||||
// DATE: 2013-12-01
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// URL: https://github.com/RobTillaart/MCP4725
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//
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|
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#include "Wire.h"
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#include "MCP4725.h"
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MCP4725 MCP(0x62); // 0x62 or 0x63
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|
||||
|
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void setup()
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{
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Serial.begin(115200);
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@ -54,6 +54,7 @@ void setup()
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Serial.print("\nDone... (start triangle mode)");
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}
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void loop()
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{
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// different gradients
|
||||
@ -84,4 +85,6 @@ int smooth2Value(uint16_t value, uint16_t steps)
|
||||
return MCP.setValue(value);
|
||||
}
|
||||
|
||||
|
||||
// -- END OF FILE --
|
||||
|
||||
|
||||
@ -1,34 +1,43 @@
|
||||
# Syntax Coloring Map For MCP4725
|
||||
# Syntax Colouring Map For MCP4725
|
||||
|
||||
# Datatypes (KEYWORD1)
|
||||
|
||||
# Data types (KEYWORD1)
|
||||
MCP4725 KEYWORD1
|
||||
|
||||
|
||||
# Methods and Functions (KEYWORD2)
|
||||
begin KEYWORD2
|
||||
isConnected KEYWORD2
|
||||
read KEYWORD2
|
||||
|
||||
setValue KEYWORD2
|
||||
getValue KEYWORD2
|
||||
writeDAC KEYWORD2
|
||||
|
||||
ready KEYWORD2
|
||||
readDAC KEYWORD2
|
||||
readEEPROM KEYWORD2
|
||||
|
||||
writePowerDownMode KEYWORD2
|
||||
readPowerDownModeEEPROM KEYWORD2
|
||||
readPowerDownModeDAC KEYWORD2
|
||||
powerOnReset KEYWORD2
|
||||
powerOnWakeUp KEYWORD2
|
||||
|
||||
getLastWriteEEPROM KEYWORD2
|
||||
setPercentage KEYWORD2
|
||||
getPercentage KEYWORD2
|
||||
|
||||
|
||||
# Instances (KEYWORD2)
|
||||
|
||||
|
||||
# Constants (LITERAL1)
|
||||
MCP4725_VERSION LITERAL1
|
||||
MCP4725_MAXVALUE LITERAL1
|
||||
MCP4725_VALUE_ERROR LITERAL1
|
||||
MCP4725_REG_ERROR LITERAL1
|
||||
|
||||
MCP4725_PDMODE_NORMAL LITERAL1
|
||||
MCP4725_PDMODE_1K LITERAL1
|
||||
MCP4725_PDMODE_100K LITERAL1
|
||||
|
||||
@ -15,8 +15,9 @@
|
||||
"type": "git",
|
||||
"url": "https://github.com/RobTillaart/MCP4725.git"
|
||||
},
|
||||
"version": "0.3.2",
|
||||
"version": "0.3.3",
|
||||
"license": "MIT",
|
||||
"frameworks": "arduino",
|
||||
"platforms": "*"
|
||||
"platforms": "*",
|
||||
"headers": "MCP4725.h"
|
||||
}
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
name=MCP4725
|
||||
version=0.3.2
|
||||
version=0.3.3
|
||||
author=Rob Tillaart <rob.tillaart@gmail.com>
|
||||
maintainer=Rob Tillaart <rob.tillaart@gmail.com>
|
||||
sentence=Arduino library for 12 bit I2C DAC - MCP4725
|
||||
|
||||
@ -28,11 +28,12 @@
|
||||
#include "MCP4725.h"
|
||||
|
||||
|
||||
|
||||
unittest_setup()
|
||||
{
|
||||
fprintf(stderr, "MCP4725_VERSION: %s\n", (char *) MCP4725_VERSION);
|
||||
}
|
||||
|
||||
|
||||
unittest_teardown()
|
||||
{
|
||||
}
|
||||
@ -40,10 +41,20 @@ unittest_teardown()
|
||||
|
||||
unittest(test_constructor)
|
||||
{
|
||||
fprintf(stderr, "VERSION: %s\n", MCP4725_VERSION);
|
||||
MCP4725 MCP(0x62);
|
||||
Wire.begin();
|
||||
|
||||
assertEqual(0, MCP.getValue());
|
||||
assertEqual(0, MCP.getLastWriteEEPROM());
|
||||
|
||||
fprintf(stderr, "test start\n");
|
||||
assureTrue(MCP.isConnected());
|
||||
// assertTrue(MCP.begin());
|
||||
}
|
||||
|
||||
|
||||
unittest(test_constant)
|
||||
{
|
||||
fprintf(stderr, "test default values\n");
|
||||
assertEqual(MCP4725_MAXVALUE, 4095);
|
||||
assertEqual(MCP4725_OK, 0);
|
||||
@ -56,16 +67,6 @@ unittest(test_constructor)
|
||||
assertEqual(MCP4725_PDMODE_1K, 1);
|
||||
assertEqual(MCP4725_PDMODE_100K, 2);
|
||||
assertEqual(MCP4725_PDMODE_500K, 3);
|
||||
|
||||
assertEqual(0, MCP.getValue());
|
||||
assertEqual(0, MCP.getLastWriteEEPROM());
|
||||
|
||||
fprintf(stderr, "test start\n");
|
||||
|
||||
assureTrue(MCP.isConnected());
|
||||
// assertTrue(MCP.begin());
|
||||
// assertTrue(MCP.isConnected());
|
||||
|
||||
}
|
||||
|
||||
|
||||
@ -95,6 +96,7 @@ unittest(test_writeDAC)
|
||||
assertEqual(MCP4725_VALUE_ERROR, MCP.writeDAC(4096, true));
|
||||
}
|
||||
|
||||
|
||||
unittest_main()
|
||||
|
||||
// --------
|
||||
|
||||
Loading…
Reference in New Issue
Block a user