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The PrintrBoard Rev F utilizes a mcp4728 DAC to set motor current. Printrbot's implementation utilizes 2 new M-codes to set and write the DAC settings to the DAC EEPROM: `M909` (Read DAC) and `M910` (Write DAC). `M907` is re-used to set value, `M908` for direct control. The Pins file for the RevF board is included.pull/1/head
Stephanie
9 years ago
committed by
Scott Lahteine
Scott Lahteine
7 changed files with 365 additions and 2 deletions
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/*
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mcp4728.cpp - Arduino library for MicroChip MCP4728 I2C D/A converter |
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For implementation details, please take a look at the datasheet http://ww1.microchip.com/downloads/en/DeviceDoc/22187a.pdf
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For discussion and feedback, please go to http://arduino.cc/forum/index.php/topic,51842.0.html
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*/ |
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/* _____PROJECT INCLUDES_____________________________________________________ */ |
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#include "dac_mcp4728.h" |
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#if ENABLED(DAC_STEPPER_CURRENT) |
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// Used Global variables
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uint16_t mcp4728_values[4]; |
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/*
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Begin I2C, get current values (input register and eeprom) of mcp4728 |
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*/ |
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void mcp4728_init() { |
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Wire.begin(); |
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Wire.requestFrom(int(DAC_DEV_ADDRESS), 24); |
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while(Wire.available()) { |
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int deviceID = Wire.receive(); |
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int hiByte = Wire.receive(); |
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int loByte = Wire.receive(); |
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int isEEPROM = (deviceID & 0B00001000) >> 3; |
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int channel = (deviceID & 0B00110000) >> 4; |
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if (isEEPROM != 1) { |
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mcp4728_values[channel] = word((hiByte & 0B00001111), loByte); |
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} |
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} |
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} |
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/*
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Write input resister value to specified channel using fastwrite method. |
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Channel : 0-3, Values : 0-4095 |
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*/ |
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uint8_t mcp4728_analogWrite(uint8_t channel, uint16_t value) { |
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mcp4728_values[channel] = value; |
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return mcp4728_fastWrite(); |
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} |
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/*
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Write all input resistor values to EEPROM using SequencialWrite method. |
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This will update both input register and EEPROM value |
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This will also write current Vref, PowerDown, Gain settings to EEPROM |
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*/ |
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uint8_t mcp4728_eepromWrite() { |
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Wire.beginTransmission(DAC_DEV_ADDRESS); |
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Wire.send(SEQWRITE); |
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for (uint8_t channel=0; channel <= 3; channel++) { |
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Wire.send(DAC_STEPPER_VREF << 7 | 0 << 5 | DAC_STEPPER_GAIN << 4 | highByte(mcp4728_values[channel])); |
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Wire.send(lowByte(mcp4728_values[channel])); |
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} |
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return Wire.endTransmission(); |
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} |
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/*
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Write Voltage reference setting to all input regiters |
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*/ |
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uint8_t mcp4728_setVref_all(uint8_t value) { |
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Wire.beginTransmission(DAC_DEV_ADDRESS); |
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Wire.send(VREFWRITE | value << 3 | value << 2 | value << 1 | value); |
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return Wire.endTransmission(); |
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} |
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/*
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Write Gain setting to all input regiters |
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*/ |
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uint8_t mcp4728_setGain_all(uint8_t value) { |
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Wire.beginTransmission(DAC_DEV_ADDRESS); |
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Wire.send(GAINWRITE | value << 3 | value << 2 | value << 1 | value); |
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return Wire.endTransmission(); |
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} |
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/*
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Return Input Regiter value |
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*/ |
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uint16_t mcp4728_getValue(uint8_t channel) { return mcp4728_values[channel]; } |
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/*
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// Steph: Might be useful in the future
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// Return Vout
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uint16_t mcp4728_getVout(uint8_t channel) { |
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uint32_t vref = 2048; |
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uint32_t vOut = (vref * mcp4728_values[channel] * (_DAC_STEPPER_GAIN + 1)) / 4096; |
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if (vOut > defaultVDD) vOut = defaultVDD; |
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return vOut; |
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} |
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*/ |
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/*
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FastWrite input register values - All DAC ouput update. refer to DATASHEET 5.6.1 |
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DAC Input and PowerDown bits update. |
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No EEPROM update |
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*/ |
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uint8_t mcp4728_fastWrite() { |
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Wire.beginTransmission(DAC_DEV_ADDRESS); |
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for (uint8_t channel=0; channel <= 3; channel++) { |
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Wire.send(highByte(mcp4728_values[channel])); |
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Wire.send(lowByte(mcp4728_values[channel])); |
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} |
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return Wire.endTransmission(); |
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} |
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/*
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Common function for simple general commands |
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*/ |
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uint8_t mcp4728_simpleCommand(byte simpleCommand) { |
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Wire.beginTransmission(GENERALCALL); |
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Wire.send(simpleCommand); |
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return Wire.endTransmission(); |
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} |
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#endif // DAC_STEPPER_CURRENT
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@ -0,0 +1,44 @@ |
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/**
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Arduino library for MicroChip MCP4728 I2C D/A converter. |
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*/ |
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#ifndef mcp4728_h |
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#define mcp4728_h |
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#include "Configuration.h" |
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#include "Configuration_adv.h" |
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#if ENABLED(DAC_STEPPER_CURRENT) |
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#include "WProgram.h" |
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#include "Wire.h" |
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//#include <Wire.h>
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#define defaultVDD 5000 |
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#define BASE_ADDR 0x60 |
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#define RESET 0B00000110 |
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#define WAKE 0B00001001 |
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#define UPDATE 0B00001000 |
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#define MULTIWRITE 0B01000000 |
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#define SINGLEWRITE 0B01011000 |
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#define SEQWRITE 0B01010000 |
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#define VREFWRITE 0B10000000 |
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#define GAINWRITE 0B11000000 |
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#define POWERDOWNWRITE 0B10100000 |
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#define GENERALCALL 0B0000000 |
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#define GAINWRITE 0B11000000 |
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// This is taken from the original lib, makes it easy to edit if needed
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#define DAC_DEV_ADDRESS (BASE_ADDR | 0x00) |
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void mcp4728_init(); |
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uint8_t mcp4728_analogWrite(uint8_t channel, uint16_t value); |
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uint8_t mcp4728_eepromWrite(); |
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uint8_t mcp4728_setVref_all(uint8_t value); |
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uint8_t mcp4728_setGain_all(uint8_t value); |
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uint16_t mcp4728_getValue(uint8_t channel); |
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uint8_t mcp4728_fastWrite(); |
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uint8_t mcp4728_simpleCommand(byte simpleCommand); |
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#endif |
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#endif |
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@ -0,0 +1,134 @@ |
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/**
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* Printrboard pin assignments (AT90USB1286) |
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* Requires the Teensyduino software with Teensy++ 2.0 selected in Arduino IDE! |
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* http://www.pjrc.com/teensy/teensyduino.html
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* See http://reprap.org/wiki/Printrboard for more info
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*/ |
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#ifndef __AVR_AT90USB1286__ |
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#error Oops! Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu. |
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#endif |
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#if ENABLED(AT90USBxx_TEENSYPP_ASSIGNMENTS) // use Teensyduino Teensy++2.0 pin assignments instead of Marlin traditional.
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#error These Printrboard assignments depend on traditional Marlin assignments, not AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h |
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#endif |
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#define LARGE_FLASH true |
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#define X_STEP_PIN 0 |
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#define X_DIR_PIN 1 |
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#define X_ENABLE_PIN 39 |
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#define Y_STEP_PIN 2 |
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#define Y_DIR_PIN 3 |
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#define Y_ENABLE_PIN 38 |
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#define Z_STEP_PIN 4 |
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#define Z_DIR_PIN 5 |
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#define Z_ENABLE_PIN 23 |
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#define E0_STEP_PIN 6 |
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#define E0_DIR_PIN 7 |
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#define E0_ENABLE_PIN 19 |
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#define HEATER_0_PIN 21 // Extruder
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#define HEATER_1_PIN 46 |
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#define HEATER_2_PIN 47 |
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#define HEATER_BED_PIN 20 |
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// If soft or fast PWM is off then use Teensyduino pin numbering, Marlin
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// fastio pin numbering otherwise
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#if ENABLED(FAN_SOFT_PWM) || ENABLED(FAST_PWM_FAN) |
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#define FAN_PIN 22 |
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#else |
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#define FAN_PIN 16 |
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#endif |
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#define X_STOP_PIN 35 |
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#define Y_STOP_PIN 12 |
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#define Z_STOP_PIN 36 |
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#define TEMP_0_PIN 1 // Extruder / Analog pin numbering
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#define TEMP_BED_PIN 0 // Bed / Analog pin numbering
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#if ENABLED(FILAMENT_SENSOR) |
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#define FILWIDTH_PIN 2 |
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#endif |
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#define TEMP_1_PIN -1 |
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#define TEMP_2_PIN -1 |
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////LCD Pin Setup////
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#define SDPOWER -1 |
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#define SDSS 20 // Teensylu pin mapping
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#define LED_PIN -1 |
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#define PS_ON_PIN -1 |
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#define KILL_PIN -1 |
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#define ALARM_PIN -1 |
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// uncomment to enable an I2C based DAC like on the Printrboard REVF
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#define DAC_STEPPER_CURRENT |
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// Number of channels available for DAC, For Printrboar REVF there are 4
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#define DAC_STEPPER_ORDER {3,2,1,0} |
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#define DAC_STEPPER_SENSE 0.11 |
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#define DAC_STEPPER_ADDRESS 0 |
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#define DAC_STEPPER_MAX 3520 |
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#define DAC_STEPPER_VREF 1 //internal Vref, gain 1x = 2.048V
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#define DAC_STEPPER_GAIN 0 |
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#if DISABLED(SDSUPPORT) |
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// these pins are defined in the SD library if building with SD support
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#define SCK_PIN 9 |
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#define MISO_PIN 11 |
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#define MOSI_PIN 10 |
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#endif |
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#if ENABLED(ULTRA_LCD) |
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#define BEEPER_PIN -1 |
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#define LCD_PINS_RS 9 |
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#define LCD_PINS_ENABLE 8 |
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#define LCD_PINS_D4 7 |
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#define LCD_PINS_D5 6 |
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#define LCD_PINS_D6 5 |
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#define LCD_PINS_D7 4 |
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#define BTN_EN1 16 |
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#define BTN_EN2 17 |
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#define BTN_ENC 18//the click
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#define BLEN_C 2 |
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#define BLEN_B 1 |
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#define BLEN_A 0 |
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#define SD_DETECT_PIN -1 |
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//encoder rotation values
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#define encrot0 0 |
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#define encrot1 2 |
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#define encrot2 3 |
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#define encrot3 1 |
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#endif |
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#if ENABLED(VIKI2) || ENABLED(miniVIKI) |
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#define BEEPER_PIN 32 //FastIO
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// Pins for DOGM SPI LCD Support
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#define DOGLCD_A0 42 //Non-FastIO
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#define DOGLCD_CS 43 //Non-FastIO
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#define LCD_SCREEN_ROT_180 |
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//The encoder and click button (FastIO Pins)
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#define BTN_EN1 26 |
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#define BTN_EN2 27 |
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#define BTN_ENC 47 //the click switch
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#define SDSS 45 |
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#define SD_DETECT_PIN -1 // FastIO (Manual says 72 I'm not certain cause I can't test)
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#if ENABLED(TEMP_STAT_LEDS) |
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#define STAT_LED_RED 12 //Non-FastIO
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#define STAT_LED_BLUE 10 //Non-FastIO
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#endif |
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#endif |
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