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.master
Stephanie
9 years ago
committed by
Scott Lahteine
parent
7f2375ab46
commit
6843b78f99
@ -0,0 +1,115 @@
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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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