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