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/**
* Marlin 3D Printer Firmware
*
* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
* Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
* Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
* Copyright (c) 2016 Victor Perez victor_pv@hotmail.com
*
* 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/>.
*
*/
#ifdef TARGET_LPC1768
#include "../../inc/MarlinConfig.h"
#if ENABLED(SDCARD_EEPROM_EMULATION)
#include "../shared/eeprom_api.h"
#include <chanfs/diskio.h>
#include <chanfs/ff.h>
extern uint32_t MSC_Aquire_Lock();
extern uint32_t MSC_Release_Lock();
FATFS fat_fs;
FIL eeprom_file;
bool eeprom_file_open = false;
#ifndef MARLIN_EEPROM_SIZE
#define MARLIN_EEPROM_SIZE size_t(0x1000) // 4KiB of Emulated EEPROM
#endif
size_t PersistentStore::capacity() { return MARLIN_EEPROM_SIZE; }
bool PersistentStore::access_start() {
const char eeprom_erase_value = 0xFF;
MSC_Aquire_Lock();
if (f_mount(&fat_fs, "", 1)) {
MSC_Release_Lock();
return false;
}
FRESULT res = f_open(&eeprom_file, "eeprom.dat", FA_OPEN_ALWAYS | FA_WRITE | FA_READ);
if (res) MSC_Release_Lock();
if (res == FR_OK) {
UINT bytes_written;
FSIZE_t file_size = f_size(&eeprom_file);
f_lseek(&eeprom_file, file_size);
while (file_size < capacity() && res == FR_OK) {
res = f_write(&eeprom_file, &eeprom_erase_value, 1, &bytes_written);
file_size++;
}
}
if (res == FR_OK) {
f_lseek(&eeprom_file, 0);
f_sync(&eeprom_file);
eeprom_file_open = true;
}
return res == FR_OK;
}
bool PersistentStore::access_finish() {
f_close(&eeprom_file);
f_unmount("");
MSC_Release_Lock();
eeprom_file_open = false;
return true;
}
// This extra chit-chat goes away soon, but is helpful for now
// to see errors that are happening in read_data / write_data
static void debug_rw(const bool write, int &pos, const uint8_t *value, const size_t size, const FRESULT s, const size_t total=0) {
PGM_P const rw_str = write ? PSTR("write") : PSTR("read");
SERIAL_CHAR(' ');
serialprintPGM(rw_str);
SERIAL_ECHOLNPAIR("_data(", pos, ",", int(value), ",", int(size), ", ...)");
if (total) {
SERIAL_ECHOPGM(" f_");
serialprintPGM(rw_str);
SERIAL_ECHOPAIR("()=", int(s), "\n size=", int(size), "\n bytes_");
serialprintPGM(write ? PSTR("written=") : PSTR("read="));
SERIAL_ECHOLN(total);
}
else
SERIAL_ECHOLNPAIR(" f_lseek()=", int(s));
}
// File function return codes for type FRESULT. This goes away soon, but
// is helpful right now to see any errors in read_data and write_data.
//
// typedef enum {
// FR_OK = 0, /* (0) Succeeded */
// FR_DISK_ERR, /* (1) A hard error occurred in the low level disk I/O layer */
// FR_INT_ERR, /* (2) Assertion failed */
// FR_NOT_READY, /* (3) The physical drive cannot work */
// FR_NO_FILE, /* (4) Could not find the file */
// FR_NO_PATH, /* (5) Could not find the path */
// FR_INVALID_NAME, /* (6) The path name format is invalid */
// FR_DENIED, /* (7) Access denied due to prohibited access or directory full */
// FR_EXIST, /* (8) Access denied due to prohibited access */
// FR_INVALID_OBJECT, /* (9) The file/directory object is invalid */
// FR_WRITE_PROTECTED, /* (10) The physical drive is write protected */
// FR_INVALID_DRIVE, /* (11) The logical drive number is invalid */
// FR_NOT_ENABLED, /* (12) The volume has no work area */
// FR_NO_FILESYSTEM, /* (13) There is no valid FAT volume */
// FR_MKFS_ABORTED, /* (14) The f_mkfs() aborted due to any problem */
// FR_TIMEOUT, /* (15) Could not get a grant to access the volume within defined period */
// FR_LOCKED, /* (16) The operation is rejected according to the file sharing policy */
// FR_NOT_ENOUGH_CORE, /* (17) LFN working buffer could not be allocated */
// FR_TOO_MANY_OPEN_FILES, /* (18) Number of open files > FF_FS_LOCK */
// FR_INVALID_PARAMETER /* (19) Given parameter is invalid */
// } FRESULT;
bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
if (!eeprom_file_open) return true;
FRESULT s;
UINT bytes_written = 0;
s = f_lseek(&eeprom_file, pos);
if (s) {
debug_rw(true, pos, value, size, s);
return s;
}
s = f_write(&eeprom_file, (void*)value, size, &bytes_written);
if (s) {
debug_rw(true, pos, value, size, s, bytes_written);
return s;
}
crc16(crc, value, size);
pos += size;
return bytes_written != size; // return true for any error
}
bool PersistentStore::read_data(int &pos, uint8_t *value, const size_t size, uint16_t *crc, const bool writing/*=true*/) {
if (!eeprom_file_open) return true;
UINT bytes_read = 0;
FRESULT s;
s = f_lseek(&eeprom_file, pos);
if (s) {
debug_rw(false, pos, value, size, s);
return true;
}
if (writing) {
s = f_read(&eeprom_file, (void*)value, size, &bytes_read);
crc16(crc, value, size);
}
else {
uint8_t temp[size];
s = f_read(&eeprom_file, (void*)temp, size, &bytes_read);
crc16(crc, temp, size);
}
if (s) {
debug_rw(false, pos, value, size, s, bytes_read);
return true;
}
pos += size;
return bytes_read != size; // return true for any error
}
#endif // SDCARD_EEPROM_EMULATION
#endif // TARGET_LPC1768
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