You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
2.6 KiB
88 lines
2.6 KiB
/**
|
|
* 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)
|
|
|
|
#if DISABLED(SPI_EEPROM_W25Q)
|
|
|
|
#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
|
|
|
|
static void _eeprom_begin(uint8_t * const pos, const uint8_t cmd) {
|
|
const uint8_t eeprom_temp[3] = {
|
|
cmd,
|
|
(unsigned(pos) >> 8) & 0xFF, // Address High
|
|
unsigned(pos) & 0xFF // Address Low
|
|
};
|
|
WRITE(SPI_EEPROM1_CS_PIN, HIGH); // Usually free already
|
|
WRITE(SPI_EEPROM1_CS_PIN, LOW); // Activate the Bus
|
|
spiSend(SPI_CHAN_EEPROM1, eeprom_temp, 3);
|
|
// Leave the Bus in-use
|
|
}
|
|
|
|
uint8_t eeprom_read_byte(uint8_t *pos) {
|
|
_eeprom_begin(pos, CMD_READ); // Set read location and begin transmission
|
|
|
|
const uint8_t v = spiRec(SPI_CHAN_EEPROM1); // After READ a value sits on the Bus
|
|
|
|
WRITE(SPI_EEPROM1_CS_PIN, HIGH); // Done with device
|
|
|
|
return v;
|
|
}
|
|
|
|
void eeprom_write_byte(uint8_t *pos, uint8_t value) {
|
|
const uint8_t eeprom_temp = CMD_WREN;
|
|
WRITE(SPI_EEPROM1_CS_PIN, LOW);
|
|
spiSend(SPI_CHAN_EEPROM1, &eeprom_temp, 1); // Write Enable
|
|
|
|
WRITE(SPI_EEPROM1_CS_PIN, HIGH); // Done with the Bus
|
|
delay(1); // For a small amount of time
|
|
|
|
_eeprom_begin(pos, CMD_WRITE); // Set write address and begin transmission
|
|
|
|
spiSend(SPI_CHAN_EEPROM1, value); // Send the value to be written
|
|
WRITE(SPI_EEPROM1_CS_PIN, HIGH); // Done with the Bus
|
|
delay(EEPROM_WRITE_DELAY); // Give page write time to complete
|
|
}
|
|
|
|
#endif // USE_SHARED_EEPROM
|
|
|
|
#endif
|
|
#endif // I2C_EEPROM
|
|
|