1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/**
* Marlin 3D Printer Firmware
* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program 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.
*
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
/**
* Platform-independent Arduino functions for SPI EEPROM.
* Enable USE_SHARED_EEPROM if not supplied by the framework.
*/
#include "../../inc/MarlinConfig.h"
#if ENABLED(SPI_EEPROM)
#include "eeprom_if.h"
void eeprom_init() {}
#if ENABLED(USE_SHARED_EEPROM)
#define CMD_WREN 6 // WREN
#define CMD_READ 2 // WRITE
#define CMD_WRITE 2 // WRITE
#ifndef EEPROM_WRITE_DELAY
#define EEPROM_WRITE_DELAY 7
#endif
uint8_t eeprom_read_byte(uint8_t* pos) {
uint8_t v;
uint8_t eeprom_temp[3];
// set read location
// begin transmission from device
eeprom_temp[0] = CMD_READ;
eeprom_temp[1] = ((unsigned)pos>>8) & 0xFF; // addr High
eeprom_temp[2] = (unsigned)pos& 0xFF; // addr Low
WRITE(SPI_EEPROM1_CS, HIGH);
WRITE(SPI_EEPROM1_CS, LOW);
spiSend(SPI_CHAN_EEPROM1, eeprom_temp, 3);
v = spiRec(SPI_CHAN_EEPROM1);
WRITE(SPI_EEPROM1_CS, HIGH);
return v;
}
void eeprom_write_byte(uint8_t* pos, uint8_t value) {
uint8_t eeprom_temp[3];
/*write enable*/
eeprom_temp[0] = CMD_WREN;
WRITE(SPI_EEPROM1_CS, LOW);
spiSend(SPI_CHAN_EEPROM1, eeprom_temp, 1);
WRITE(SPI_EEPROM1_CS, HIGH);
delay(1);
/*write addr*/
eeprom_temp[0] = CMD_WRITE;
eeprom_temp[1] = ((unsigned)pos>>8) & 0xFF; //addr High
eeprom_temp[2] = (unsigned)pos & 0xFF; //addr Low
WRITE(SPI_EEPROM1_CS, LOW);
spiSend(SPI_CHAN_EEPROM1, eeprom_temp, 3);
spiSend(SPI_CHAN_EEPROM1, value);
WRITE(SPI_EEPROM1_CS, HIGH);
delay(EEPROM_WRITE_DELAY); // wait for page write to complete
}
#endif // USE_SHARED_EEPROM
#endif // I2C_EEPROM
|
