Add support for Printrboard RevF

Marlin/Makefile

@@ -163,6 +163,9 @@ MCU              ?= at90usb1286
 else ifeq  ($(HARDWARE_MOTHERBOARD),81)
 HARDWARE_VARIANT ?= Teensy
 MCU              ?= at90usb1286
+else ifeq  ($(HARDWARE_MOTHERBOARD),811)
+HARDWARE_VARIANT ?= Teensy
+MCU              ?= at90usb1286
 else ifeq  ($(HARDWARE_MOTHERBOARD),82)
 HARDWARE_VARIANT ?= Teensy
 MCU              ?= at90usb646
@@ -287,7 +290,7 @@ CXXSRC = WMath.cpp WString.cpp Print.cpp Marlin_main.cpp	\
 	SdFile.cpp SdVolume.cpp planner.cpp stepper.cpp \
 	temperature.cpp cardreader.cpp configuration_store.cpp \
 	watchdog.cpp SPI.cpp servo.cpp Tone.cpp ultralcd.cpp digipot_mcp4451.cpp \
-	vector_3.cpp qr_solve.cpp buzzer.cpp
+	dac_mcp4728.cpp vector_3.cpp qr_solve.cpp buzzer.cpp
 ifeq ($(LIQUID_TWI2), 0)
 CXXSRC += LiquidCrystal.cpp
 else

Marlin/Marlin_main.cpp

@@ -68,6 +68,10 @@
   #include <SPI.h>
 #endif
 
+#if ENABLED(DAC_STEPPER_CURRENT)
+  #include "stepper_dac.h"
+#endif
+
 /**
  * Look here for descriptions of G-codes:
  *  - http://linuxcnc.org/handbook/gcode/g-code.html
@@ -203,6 +207,8 @@
  * M605 - Set dual x-carriage movement mode: S<mode> [ X<duplication x-offset> R<duplication temp offset> ]
  * M907 - Set digital trimpot motor current using axis codes.
  * M908 - Control digital trimpot directly.
+ * M909 - DAC_STEPPER_CURRENT: Print digipot/DAC current value
+ * M910 - DAC_STEPPER_CURRENT: Commit digipot/DAC value to external EEPROM via I2C
  * M350 - Set microstepping mode.
  * M351 - Toggle MS1 MS2 pins directly.
  *
@@ -5643,21 +5649,44 @@ inline void gcode_M907() {
     // for each additional extruder (named B,C,D,E..., channels 4,5,6,7...)
     for (int i = NUM_AXIS; i < DIGIPOT_I2C_NUM_CHANNELS; i++) if (code_seen('B' + i - (NUM_AXIS))) digipot_i2c_set_current(i, code_value());
   #endif
+  #if ENABLED(DAC_STEPPER_CURRENT)
+    if (code_seen('S')) {
+      float dac_percent = code_value();
+      for (uint8_t i = 0; i <= 4; i++) dac_current_percent(i, dac_percent);
+    }
+    for (uint8_t i = 0; i < NUM_AXIS; i++) if (code_seen(axis_codes[i])) dac_current_percent(i, code_value());
+  #endif
 }
 
-#if HAS_DIGIPOTSS
+#if HAS_DIGIPOTSS || ENABLED(DAC_STEPPER_CURRENT)
 
   /**
    * M908: Control digital trimpot directly (M908 P<pin> S<current>)
    */
   inline void gcode_M908() {
-    digitalPotWrite(
-      code_seen('P') ? code_value() : 0,
-      code_seen('S') ? code_value() : 0
-    );
+    #if HAS_DIGIPOTSS
+      digitalPotWrite(
+        code_seen('P') ? code_value() : 0,
+        code_seen('S') ? code_value() : 0
+      );
+    #endif
+    #ifdef DAC_STEPPER_CURRENT
+      dac_current_raw(
+        code_seen('P') ? code_value_long() : -1,
+        code_seen('S') ? code_value_short() : 0
+      );
+    #endif
   }
 
-#endif // HAS_DIGIPOTSS
+  #if ENABLED(DAC_STEPPER_CURRENT) // As with Printrbot RevF
+
+    inline void gcode_M909() { dac_print_values(); }
+
+    inline void gcode_M910() { dac_commit_eeprom(); }
+
+  #endif
+
+#endif // HAS_DIGIPOTSS || DAC_STEPPER_CURRENT
 
 #if HAS_MICROSTEPS
 
@@ -6356,11 +6385,25 @@ void process_next_command() {
         gcode_M907();
         break;
 
-      #if HAS_DIGIPOTSS
+      #if HAS_DIGIPOTSS || ENABLED(DAC_STEPPER_CURRENT)
+
         case 908: // M908 Control digital trimpot directly.
           gcode_M908();
           break;
-      #endif // HAS_DIGIPOTSS
+
+        #if ENABLED(DAC_STEPPER_CURRENT) // As with Printrbot RevF
+
+          case 909: // M909 Print digipot/DAC current value
+            gcode_M909();
+            break;
+
+          case 910: // M910 Commit digipot/DAC value to external EEPROM
+            gcode_M910();
+            break;
+
+        #endif
+
+      #endif // HAS_DIGIPOTSS || DAC_STEPPER_CURRENT
 
       #if HAS_MICROSTEPS
 

Marlin/boards.h

@@ -40,6 +40,7 @@
 #define BOARD_TEENSYLU          8    // Teensylu
 #define BOARD_RUMBA             80   // Rumba
 #define BOARD_PRINTRBOARD       81   // Printrboard (AT90USB1286)
+#define BOARD_PRINTRBOARD_REVF  811  // Printrboard Revision F (AT90USB1286)
 #define BOARD_BRAINWAVE         82   // Brainwave (AT90USB646)
 #define BOARD_SAV_MKI           83   // SAV Mk-I (AT90USB1286)
 #define BOARD_TEENSY2           84   // Teensy++2.0 (AT90USB1286) - CLI compile: DEFINES=AT90USBxx_TEENSYPP_ASSIGNMENTS HARDWARE_MOTHERBOARD=84  make

Marlin/dac_mcp4728.cpp

@@ -0,0 +1,115 @@
+/*
+
+  mcp4728.cpp - Arduino library for MicroChip MCP4728 I2C D/A converter
+  For implementation details, please take a look at the datasheet http://ww1.microchip.com/downloads/en/DeviceDoc/22187a.pdf
+  For discussion and feedback, please go to http://arduino.cc/forum/index.php/topic,51842.0.html
+*/
+
+
+/* _____PROJECT INCLUDES_____________________________________________________ */
+#include "dac_mcp4728.h"
+
+#if ENABLED(DAC_STEPPER_CURRENT)
+
+// Used Global variables
+uint16_t     mcp4728_values[4];
+
+/*
+Begin I2C, get current values (input register and eeprom) of mcp4728
+*/
+void mcp4728_init() {
+  Wire.begin();
+  Wire.requestFrom(int(DAC_DEV_ADDRESS), 24);
+  while(Wire.available()) {
+    int deviceID = Wire.receive();
+    int hiByte = Wire.receive();
+    int loByte = Wire.receive();
+
+    int isEEPROM = (deviceID & 0B00001000) >> 3;
+    int channel = (deviceID & 0B00110000) >> 4;
+    if (isEEPROM != 1) {
+      mcp4728_values[channel] = word((hiByte & 0B00001111), loByte);
+    }
+  }
+}
+
+/*
+Write input resister value to specified channel using fastwrite method.
+Channel : 0-3, Values : 0-4095
+*/
+uint8_t mcp4728_analogWrite(uint8_t channel, uint16_t value) {
+  mcp4728_values[channel] = value;
+  return mcp4728_fastWrite();
+}
+/*
+Write all input resistor values to EEPROM using SequencialWrite method.
+This will update both input register and EEPROM value
+This will also write current Vref, PowerDown, Gain settings to EEPROM
+*/
+uint8_t mcp4728_eepromWrite() {
+  Wire.beginTransmission(DAC_DEV_ADDRESS);
+  Wire.send(SEQWRITE);
+  for (uint8_t channel=0; channel <= 3; channel++) {
+    Wire.send(DAC_STEPPER_VREF << 7 | 0 << 5 | DAC_STEPPER_GAIN << 4 | highByte(mcp4728_values[channel]));
+    Wire.send(lowByte(mcp4728_values[channel]));
+  }
+  return Wire.endTransmission();
+}
+
+/*
+  Write Voltage reference setting to all input regiters
+*/
+uint8_t mcp4728_setVref_all(uint8_t value) {
+  Wire.beginTransmission(DAC_DEV_ADDRESS);
+  Wire.send(VREFWRITE | value << 3 | value << 2 | value << 1 | value);
+  return Wire.endTransmission();
+}
+/*
+  Write Gain setting to all input regiters
+*/
+uint8_t mcp4728_setGain_all(uint8_t value) {
+  Wire.beginTransmission(DAC_DEV_ADDRESS);
+  Wire.send(GAINWRITE | value << 3 | value << 2 | value << 1 | value);
+  return Wire.endTransmission();
+}
+
+/*
+  Return Input Regiter value
+*/
+uint16_t mcp4728_getValue(uint8_t channel) { return mcp4728_values[channel]; }
+
+/*
+// Steph: Might be useful in the future
+// Return Vout
+uint16_t mcp4728_getVout(uint8_t channel) {
+  uint32_t vref = 2048;
+  uint32_t vOut = (vref * mcp4728_values[channel] * (_DAC_STEPPER_GAIN + 1)) / 4096;
+  if (vOut > defaultVDD) vOut = defaultVDD;
+  return vOut;
+}
+*/
+
+/*
+FastWrite input register values - All DAC ouput update. refer to DATASHEET 5.6.1
+DAC Input and PowerDown bits update.
+No EEPROM update
+*/
+uint8_t mcp4728_fastWrite() {
+  Wire.beginTransmission(DAC_DEV_ADDRESS);
+  for (uint8_t channel=0; channel <= 3; channel++) {
+    Wire.send(highByte(mcp4728_values[channel]));
+    Wire.send(lowByte(mcp4728_values[channel]));
+  }
+  return Wire.endTransmission();
+}
+
+/*
+Common function for simple general commands
+*/
+uint8_t mcp4728_simpleCommand(byte simpleCommand) {
+  Wire.beginTransmission(GENERALCALL);
+  Wire.send(simpleCommand);
+  return Wire.endTransmission();
+}
+
+#endif // DAC_STEPPER_CURRENT

Marlin/dac_mcp4728.h

@@ -0,0 +1,44 @@
+/**
+Arduino library for MicroChip MCP4728 I2C D/A converter.
+*/
+
+#ifndef mcp4728_h
+#define mcp4728_h
+
+#include "Configuration.h"
+#include "Configuration_adv.h"
+
+#if ENABLED(DAC_STEPPER_CURRENT)
+#include "WProgram.h"
+#include "Wire.h"
+//#include <Wire.h>
+
+#define defaultVDD 5000
+#define BASE_ADDR 0x60
+#define RESET 0B00000110
+#define WAKE 0B00001001
+#define UPDATE 0B00001000
+#define MULTIWRITE 0B01000000
+#define SINGLEWRITE 0B01011000
+#define SEQWRITE 0B01010000
+#define VREFWRITE 0B10000000
+#define GAINWRITE 0B11000000
+#define POWERDOWNWRITE 0B10100000
+#define GENERALCALL 0B0000000
+#define GAINWRITE 0B11000000
+
+// This is taken from the original lib, makes it easy to edit if needed
+#define DAC_DEV_ADDRESS (BASE_ADDR | 0x00)
+
+void mcp4728_init();
+uint8_t mcp4728_analogWrite(uint8_t channel, uint16_t value);
+uint8_t mcp4728_eepromWrite();
+uint8_t mcp4728_setVref_all(uint8_t value);
+uint8_t mcp4728_setGain_all(uint8_t value);
+uint16_t mcp4728_getValue(uint8_t channel);
+uint8_t mcp4728_fastWrite();
+uint8_t mcp4728_simpleCommand(byte simpleCommand);
+
+#endif
+#endif
+

Marlin/pins.h

@@ -77,6 +77,8 @@
   #include "pins_RUMBA.h"
 #elif MB(PRINTRBOARD)
   #include "pins_PRINTRBOARD.h"
+#elif MB(PRINTRBOARD_REVF)
+  #include "pins_PRINTRBOARD_REVF.h"
 #elif MB(BRAINWAVE)
   #include "pins_BRAINWAVE.h"
 #elif MB(BRAINWAVE_PRO)