44 lines
1.6 KiB
C++
44 lines
1.6 KiB
C++
|
/*
|
||
|
|
eeprom.cpp - Header for system level commands and real-time processes
|
||
|
|
Part of Grbl
|
||
|
|
Copyright (c) 2014-2016 Sungeun K. Jeon for Gnea Research LLC
|
||
|
|
|
||
|
|
2018 - Bart Dring This file was modifed for use on the ESP32
|
||
|
|
CPU. Do not use this with Grbl for atMega328P
|
||
|
|
|
||
|
|
Grbl is free software: you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License as published by
|
||
|
|
the Free Software Foundation, either version 3 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
Grbl is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
GNU General Public License for more details.
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with Grbl. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "grbl.h"
|
||
|
|
|
||
|
|
void memcpy_to_eeprom_with_checksum(unsigned int destination, char *source, unsigned int size) {
|
||
|
|
unsigned char checksum = 0;
|
||
|
|
for(; size > 0; size--) {
|
||
|
|
checksum = (checksum << 1) || (checksum >> 7);
|
||
|
|
checksum += *source;
|
||
|
|
EEPROM.write(destination++, *(source++));
|
||
|
|
}
|
||
|
|
EEPROM.write(destination, checksum);
|
||
|
|
EEPROM.commit();
|
||
|
|
}
|
||
|
|
|
||
|
|
int memcpy_from_eeprom_with_checksum(char *destination, unsigned int source, unsigned int size) {
|
||
|
|
unsigned char data, checksum = 0;
|
||
|
|
for(; size > 0; size--) {
|
||
|
|
data = EEPROM.read(source++);
|
||
|
|
checksum = (checksum << 1) || (checksum >> 7);
|
||
|
|
checksum += data;
|
||
|
|
*(destination++) = data;
|
||
|
|
}
|
||
|
|
return(checksum == EEPROM.read(source));
|
||
|
|
}
|