diff --git a/Marlin/src/HAL/HAL_LPC1768/persistent_store_api.h b/Marlin/src/HAL/HAL_LPC1768/persistent_store_api.h
new file mode 100644
index 0000000000..2b4d23a54a
--- /dev/null
+++ b/Marlin/src/HAL/HAL_LPC1768/persistent_store_api.h
@@ -0,0 +1,24 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016, 2017 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 .
+ *
+ */
+#include "../persistent_store_api.h"
+
+//#define FLASH_EEPROM
diff --git a/Marlin/src/HAL/HAL_LPC1768/persistent_store_flash.cpp b/Marlin/src/HAL/HAL_LPC1768/persistent_store_flash.cpp
new file mode 100644
index 0000000000..36825f15ff
--- /dev/null
+++ b/Marlin/src/HAL/HAL_LPC1768/persistent_store_flash.cpp
@@ -0,0 +1,139 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016, 2017 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 .
+ *
+ */
+#ifdef TARGET_LPC1768
+
+/**
+ * Emulate EEPROM storage using Flash Memory
+ *
+ * Use a single 32K flash sector to store EEPROM data. To reduce the
+ * number of erase operations a simple "levelling" scheme is used that
+ * maintains a number of EEPROM "slots" within the larger flash sector.
+ * Each slot is used in turn and the entire sector is only erased when all
+ * slots have been used.
+ *
+ * A simple RAM image is used to hold the EEPROM data during I/O operations
+ * and this is flushed to the next available slot when an update is complete.
+ * If RAM usage becomes an issue we could store this image in one of the two
+ * 16Kb I/O buffers (intended to hold DMA USB and Ethernet data, but currently
+ * unused).
+ */
+#include "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(EEPROM_SETTINGS)
+
+#include "persistent_store_api.h"
+
+#if ENABLED(FLASH_EEPROM)
+
+extern "C" {
+ #include "lpc17xx_iap.h"
+}
+
+#define SECTOR_START(sector) ((sector < 16) ? (sector * 0x1000) : ((sector - 14) * 0x8000))
+#define EEPROM_SECTOR 29
+#define EEPROM_SIZE (E2END+1)
+#define SECTOR_SIZE (32768)
+#define EEPROM_SLOTS (SECTOR_SIZE/EEPROM_SIZE)
+#define EEPROM_ERASE (0xff)
+#define SLOT_ADDRESS(sector, slot) (((uint8_t *)SECTOR_START(sector)) + slot * EEPROM_SIZE)
+
+#if EEPROM_SIZE != 4096
+ #error "EEPROM_SIZE must match flash write size"
+#endif
+
+static uint8_t ram_eeprom[EEPROM_SIZE];
+static bool eeprom_dirty = false;
+static int current_slot = 0;
+
+bool PersistentStore::access_start() {
+ uint32_t first_nblank_loc, first_nblank_val;
+ IAP_STATUS_CODE status;
+
+ // discover which slot we are currently using.
+ __disable_irq();
+ status = BlankCheckSector(EEPROM_SECTOR, EEPROM_SECTOR, &first_nblank_loc, &first_nblank_val);
+ __enable_irq();
+ SERIAL_PROTOCOLLNPAIR("Blank check status: ", status);
+ if (status == CMD_SUCCESS) {
+ // sector is blank so nothing stored yet
+ SERIAL_PROTOCOLLNPGM("FLASH empty");
+ for (int i = 0; i < EEPROM_SIZE; i++) ram_eeprom[i] = EEPROM_ERASE;
+ current_slot = EEPROM_SLOTS;
+ }
+ else {
+ // current slot is the first non blank one
+ current_slot = first_nblank_loc / EEPROM_SIZE;
+ SERIAL_PROTOCOLLNPAIR("Flash slot: ", current_slot);
+ uint8_t *eeprom_data = SLOT_ADDRESS(EEPROM_SECTOR, current_slot);
+ SERIAL_PROTOCOLLNPAIR("Address: ", (int)eeprom_data);
+
+ // load current settings
+ for (int i = 0; i < EEPROM_SIZE; i++) ram_eeprom[i] = eeprom_data[i];
+ }
+ eeprom_dirty = false;
+
+ return true;
+}
+
+bool PersistentStore::access_finish() {
+ if (eeprom_dirty) {
+ IAP_STATUS_CODE status;
+ if (--current_slot < 0) {
+ // all slots have been used, erase everything and start again
+ __disable_irq();
+ PrepareSector(EEPROM_SECTOR, EEPROM_SECTOR);
+ status = EraseSector(EEPROM_SECTOR, EEPROM_SECTOR);
+ __enable_irq();
+ SERIAL_PROTOCOLLNPAIR("Erase status: ", status);
+ current_slot = EEPROM_SLOTS - 1;
+ }
+ SERIAL_PROTOCOLLNPAIR("Writing data to: ", current_slot);
+ __disable_irq();
+ PrepareSector(EEPROM_SECTOR, EEPROM_SECTOR);
+ status = CopyRAM2Flash(SLOT_ADDRESS(EEPROM_SECTOR, current_slot), ram_eeprom, IAP_WRITE_4096);
+ __enable_irq();
+ SERIAL_PROTOCOLLNPAIR("CopyRAM2Flash status: ", status);
+ if (status != CMD_SUCCESS) return false;
+ eeprom_dirty = false;
+ }
+ return true;
+}
+
+bool PersistentStore::write_data(int &pos, const uint8_t *value, uint16_t size, uint16_t *crc) {
+ for (int i = 0; i < size; i++) ram_eeprom[pos + i] = value[i];
+ eeprom_dirty = true;
+ crc16(crc, value, size);
+ pos += size;
+ return false; // return true for any error
+}
+
+bool PersistentStore::read_data(int &pos, uint8_t* value, uint16_t size, uint16_t *crc, const bool writing/*=true*/) {
+ const uint8_t * const buff = writing ? &value[0] : &ram_eeprom[pos];
+ if (writing) for (int i = 0; i < size; i++) value[i] = ram_eeprom[pos + i];
+ crc16(crc, buff, size);
+ pos += size;
+ return false; // return true for any error
+}
+
+#endif // FLASH_EEPROM
+#endif // EEPROM_SETTINGS
+#endif // TARGET_LPC1768
diff --git a/Marlin/src/HAL/HAL_LPC1768/persistent_store_sdcard.cpp b/Marlin/src/HAL/HAL_LPC1768/persistent_store_sdcard.cpp
index 42264e1ccc..f221f1b0b2 100644
--- a/Marlin/src/HAL/HAL_LPC1768/persistent_store_sdcard.cpp
+++ b/Marlin/src/HAL/HAL_LPC1768/persistent_store_sdcard.cpp
@@ -22,11 +22,13 @@
*/
#ifdef TARGET_LPC1768
-#include "../../inc/MarlinConfig.h"
+#include "../../inc/MarlinConfigPre.h"
#if ENABLED(EEPROM_SETTINGS)
-#include "../persistent_store_api.h"
+#include "persistent_store_api.h"
+
+#if DISABLED(FLASH_EEPROM)
#include
#include
@@ -73,8 +75,31 @@ bool PersistentStore::access_finish() {
return true;
}
-// File function return codes for type FRESULT This goes away soon. But it is helpful right now to see
-// the different errors the read_data() and write_data() functions are seeing.
+// 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) {
+ const char * const rw_str = write ? PSTR("write") : PSTR("read");
+ SERIAL_PROTOCOLCHAR(' ');
+ serialprint_PGM(rw_str);
+ SERIAL_PROTOCOLPAIR("_data(", pos);
+ SERIAL_PROTOCOLPAIR(",", (int)value);
+ SERIAL_PROTOCOLPAIR(",", (int)size);
+ SERIAL_PROTOCOLLNPGM(", ...)");
+ if (total) {
+ SERIAL_PROTOCOLPGM(" f_");
+ serialprint_PGM(rw_str);
+ SERIAL_PROTOCOLPAIR("()=", (int)s);
+ SERIAL_PROTOCOLPAIR("\n size=", size);
+ SERIAL_PROTOCOLPGM("\n bytes_");
+ serialprint_PGM(write ? PSTR("written=") : PSTR("read="));
+ SERIAL_PROTOCOLLN(total);
+ }
+ else
+ SERIAL_PROTOCOLLNPAIR(" 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 */
@@ -106,28 +131,18 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, const size_t si
s = f_lseek(&eeprom_file, pos);
if (s) {
- SERIAL_PROTOCOLPAIR(" write_data(", pos); // This extra chit-chat goes away soon. But it is helpful
- SERIAL_PROTOCOLPAIR(",", (int)value); // right now to see errors that are happening in the
- SERIAL_PROTOCOLPAIR(",", (int)size); // read_data() and write_data() functions
- SERIAL_PROTOCOLLNPGM("...)");
- SERIAL_PROTOCOLLNPAIR(" f_lseek()=", (int)s);
- return s;
+ debug_rw(true, pos, value, size, s);
+ return s;
}
s = f_write(&eeprom_file, (void*)value, size, &bytes_written);
if (s) {
- SERIAL_PROTOCOLPAIR(" write_data(", pos); // This extra chit-chat goes away soon. But it is helpful
- SERIAL_PROTOCOLPAIR(",", (int)value); // right now to see errors that are happening in the
- SERIAL_PROTOCOLPAIR(",", size); // read_data() and write_data() functions
- SERIAL_PROTOCOLLNPGM("...)");
- SERIAL_PROTOCOLLNPAIR(" f_write()=", (int)s);
- SERIAL_PROTOCOLPAIR(" size=", size);
- SERIAL_PROTOCOLLNPAIR("\n bytes_written=", bytes_written);
- return s;
+ debug_rw(true, pos, value, size, s, bytes_written);
+ return s;
}
crc16(crc, value, size);
- pos = pos + size;
- return (bytes_written != size); // return true for any error
+ 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*/) {
@@ -137,14 +152,8 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, const size_t size, uin
s = f_lseek(&eeprom_file, pos);
if (s) {
- SERIAL_PROTOCOLPAIR(" read_data(", pos); // This extra chit-chat goes away soon. But it is helpful
- SERIAL_PROTOCOLCHAR(',');
- SERIAL_PROTOCOL((int)value); // right now to see errors that are happening in the
- SERIAL_PROTOCOLCHAR(',');
- SERIAL_PROTOCOL(size); // read_data() and write_data() functions
- SERIAL_PROTOCOLLNPGM("...)");
- SERIAL_PROTOCOLLNPAIR(" f_lseek()=", (int)s);
- return true;
+ debug_rw(false, pos, value, size, s);
+ return true;
}
if (writing) {
@@ -158,23 +167,16 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, const size_t size, uin
}
if (s) {
- SERIAL_PROTOCOLPAIR(" read_data(", pos); // This extra chit-chat goes away soon. But it is helpful
- SERIAL_PROTOCOLCHAR(',');
- SERIAL_PROTOCOL((int)value); // right now to see errors that are happening in the
- SERIAL_PROTOCOLCHAR(',');
- SERIAL_PROTOCOL(size); // read_data() and write_data() functions
- SERIAL_PROTOCOLLNPGM("...)");
- SERIAL_PROTOCOLLNPAIR(" f_write()=", (int)s);
- SERIAL_PROTOCOLPAIR(" size=", size);
- SERIAL_PROTOCOLLNPAIR("\n bytes_read=", bytes_read);
- return true;
+ debug_rw(false, pos, value, size, s, bytes_read);
+ return true;
}
- pos = pos + size;
+ pos += size;
return bytes_read != size; // return true for any error
}
const size_t PersistentStore::capacity() { return 4096; } // 4KiB of Emulated EEPROM
+#endif // !FLASH_EEPROM
#endif // EEPROM_SETTINGS
#endif // TARGET_LPC1768
diff --git a/frameworks/CMSIS/LPC1768/system/LPC1768.ld b/frameworks/CMSIS/LPC1768/system/LPC1768.ld
index 7236f04013..f30ea0d1fc 100644
--- a/frameworks/CMSIS/LPC1768/system/LPC1768.ld
+++ b/frameworks/CMSIS/LPC1768/system/LPC1768.ld
@@ -1,8 +1,10 @@
/* Linker script for mbed LPC1768 */
MEMORY
{
- //FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 512K
- FLASH (rx) : ORIGIN = 16K, LENGTH = (512K - 16K)
+ /* Reserve first 16K (4 sectors * 4KB) for bootloader
+ * Reserve the last 32KB sector for EEPROM emulation
+ */
+ FLASH (rx) : ORIGIN = 16K, LENGTH = (512K - 48K)
RAM (rwx) : ORIGIN = 0x100000C8, LENGTH = (32K - 0xC8)
USB_RAM(rwx) : ORIGIN = 0x2007C000, LENGTH = 16K