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grbl/examples/grblUpload/grblUpload.ino

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+/***********************************************************************
+This sketch compiles and uploads Grbl to your 328p-based Arduino! 
+
+To use:
+- First make sure you have imported Grbl source code into your Arduino
+  IDE. There are details on our Github website on how to do this.
+
+- Select your Arduino Board and Serial Port in the Tools drop-down menu.
+  NOTE: Grbl only officially supports 328p-based Arduinos, like the Uno.
+  Using other boards will likely not work!
+
+- Then just click 'Upload'. That's it!
+
+For advanced users:
+  If you'd like to see what else Grbl can do, there are some additional
+  options for customization and features you can enable or disable. 
+  Navigate your file system to where the Arduino IDE has stored the Grbl 
+  source code files, open the 'config.h' file in your favorite text 
+  editor. Inside are dozens of feature descriptions and #defines. Simply
+  comment or uncomment the #defines or alter their assigned values, save
+  your changes, and then click 'Upload' here. 
+
+Copyright (c) 2015 Sungeun K. Jeon
+Released under the MIT-license. See license.txt for details.
+***********************************************************************/
+
+#include <grbl.h>
+
+// Do not alter this file!

grbl/examples/grblUpload/license.txt

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+The MIT License (MIT)
+
+Copyright (c) 2015 Sungeun K. Jeon
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

grbl/examples/grblWrite_BuildInfo/grblWrite_BuildInfo.ino

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+/***********************************************************************
+This sketch writes a `$I` build info string directly into Arduino EEPROM
+
+To use:
+- Just alter the "build_info_line" string to whatever you'd like. Then 
+  compile and upload this sketch to your Arduino.
+    
+- If your Arduino is blinking slowly, your string has already been 
+  written to your EEPROM and been verified by checksums! That's it!
+
+- If you Arduino LED is blinking fast, something went wrong and the 
+  checksums don't match. You can optionally connect to the Arduino via
+  the serial monitor, and the sketch will show what its doing.
+
+NOTE: This sketch is provided as a tool template for OEMs who may need
+to restrict users from altering their build info, so they can place
+important product information here when enabling the restriction.
+
+NOTE: When uploading Grbl to the Arduino with this sketch on it, make
+sure you see the slow blink before you start the upload process. This
+ensures you aren't flashing Grbl when it's in mid-write of the EEPROM.
+
+Copyright (c) 2016 Sungeun K. Jeon for Gnea Research LLC
+Released under the MIT-license. See license.txt for details.
+***********************************************************************/
+
+#include <avr/pgmspace.h>
+#include <EEPROM.h>
+
+#define SERIAL_BAUD_RATE 115200
+#define LINE_LENGTH 80U    // Grbl line length
+#define BYTE_LOCATION 942U // Grbl build info EEPROM address.
+
+
+// ----- CHANGE THIS LINE -----
+
+char build_info_line[LINE_LENGTH] = "Testing123.";
+
+// -----------------------------
+
+
+uint8_t status = false;
+int ledPin = 13;                 // LED connected to digital pin 13
+
+void setup() {
+  Serial.begin(SERIAL_BAUD_RATE);
+  delay(500);
+  
+  uint32_t address = BYTE_LOCATION;
+  uint32_t size = LINE_LENGTH;
+  char *write_pointer = (char*)build_info_line;
+  uint8_t write_checksum = 0;
+  for (; size>0; size--) { 
+    write_checksum = (write_checksum << 1) || (write_checksum >> 7);
+    write_checksum += *write_pointer;
+    EEPROM.put(address++, *(write_pointer++)); 
+  }
+  EEPROM.put(address,write_checksum);
+  
+  Serial.print(F("-> Writing line to EEPROM: '"));
+  Serial.print(build_info_line);
+  Serial.print(F("'\n\r-> Write checksum: "));
+  Serial.println(write_checksum,DEC);
+
+  size = LINE_LENGTH;
+  address = BYTE_LOCATION;
+  uint8_t data = 0;
+  char read_line[LINE_LENGTH];
+  char *read_pointer = (char*)read_line;
+  uint8_t read_checksum = 0;
+  uint8_t stored_checksum = 0;
+  for(; size > 0; size--) { 
+    data = EEPROM.read(address++);
+    read_checksum = (read_checksum << 1) || (read_checksum >> 7);
+    read_checksum += data;    
+    *(read_pointer++) = data; 
+  }
+  stored_checksum = EEPROM.read(address);
+
+  Serial.print(F("<- Reading line from EEPROM: '"));
+  Serial.print(read_line);
+  Serial.print("'\n\r<- Read checksum: ");
+  Serial.println(read_checksum,DEC);
+  
+  if ((read_checksum == write_checksum) && (read_checksum == stored_checksum)) {
+    status = true;
+    Serial.print(F("SUCCESS! All checksums match!\r\n"));
+  } else {
+    if (write_checksum != stored_checksum) {
+      Serial.println(F("ERROR! Write and stored EEPROM checksums don't match!"));
+    } else {
+      Serial.println(F("ERROR! Read and stored checksums don't match!"));
+    }
+  }
+  pinMode(ledPin, OUTPUT);      // sets the digital pin as output
+}
+
+void loop() {
+  // Blink to let user know EEPROM write status. 
+  // Slow blink is 'ok'. Fast blink is an 'error'.
+  digitalWrite(ledPin, HIGH);   // sets the LED on
+  if (status) { delay(1500); } // Slow blink
+  else { delay(100); } // Rapid blink
+  digitalWrite(ledPin, LOW);    // sets the LED off
+  if (status) { delay(1500); }
+  else { delay(100); } 
+}
+
+

grbl/examples/grblWrite_BuildInfo/license.txt

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+The MIT License (MIT)
+
+Copyright (c) 2016 Sungeun K. Jeon for Gnea Research LLC
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.