Revision 0:e2b0ee19db2b, committed 2014-09-26

Comitter:

kstech

Date:

Fri Sep 26 09:22:57 2014 +0000

Commit message:

11u24 Eeprom utility

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/IAP.cpp	Fri Sep 26 09:22:57 2014 +0000
@@ -0,0 +1,248 @@
+/**    IAP : internal Flash memory access library
+ *
+ *        The internal Flash memory access is described in the LPC1768 usermanual. 
+ *            http://www.nxp.com/documents/user_manual/UM10360.pdf
+ *
+ *            Chapter  2: "LPC17xx Memory map"
+ *            Chapter 32: "LPC17xx Flash memory interface and programming"
+ *                refering Rev. 01 - 4 January 2010
+ *
+ *        Released under the MIT License: http://mbed.org/license/mit
+ *
+ *        revision 1.0  09-Mar-2010   1st release
+ *        revision 1.1  12-Mar-2010   chaged: to make possible to reserve flash area for user
+ *                                            it can be set by USER_FLASH_AREA_START and USER_FLASH_AREA_SIZE in IAP.h
+ *
+ *     by Tedd OKANO http://mbed.org/users/okano/notebook/iap-in-application-programming-internal-flash-eras/
+ *     modified by Suga (supported to LPC11U24)
+ */
+
+#include    "mbed.h"
+#include    "IAP.h"
+
+#define     USER_FLASH_AREA_START_STR( x )      STR( x )
+#define     STR( x )                            #x
+
+unsigned char user_area[ USER_FLASH_AREA_SIZE ] __attribute__((section( ".ARM.__at_" USER_FLASH_AREA_START_STR( USER_FLASH_AREA_START ) ), zero_init));
+
+
+/*
+ *  Reserve of flash area is explained by Igor. Please refer next URL
+ *    http://mbed.org/users/okano/notebook/iap-in-application-programming-internal-flash-eras/?page=1#comment-271
+ */
+ 
+//unsigned char user_area[ size ] __attribute__((section(".ARM.__at_0x78000"), zero_init));
+
+/*
+ *  IAP command codes
+ *  Table 589. "IAP Command Summary", Chapter 8. "IAP commands", usermanual
+ */
+
+enum command_code
+        {
+            IAPCommand_Prepare_sector_for_write_operation    = 50,
+            IAPCommand_Copy_RAM_to_Flash,
+            IAPCommand_Erase_sector,
+            IAPCommand_Blank_check_sector,
+            IAPCommand_Read_part_ID,
+            IAPCommand_Read_Boot_Code_version,
+            IAPCommand_Compare,
+            IAPCommand_Reinvoke_ISP,
+            IAPCommand_Read_device_serial_number,
+            IAPCommand_EEPROM_Write = 61,
+            IAPCommand_EEPROM_Read,
+        };
+
+
+/** Read part identification number
+ *
+ *  @return    device ID
+ *  @see       read_serial()
+ */
+
+int IAP::read_ID( void ) {
+    IAP_command[ 0 ]    = IAPCommand_Read_part_ID;
+    
+    iap_entry( IAP_command, IAP_result );
+    
+    //  return ( (int)IAP_result[ 0 ] );
+    return ( (int)IAP_result[ 1 ] );    //  to return the number itself (this command always returns CMD_SUCCESS)
+}
+
+
+/** Read device serial number
+ *
+ *  @return    device serial number
+ *  @see       read_ID()
+ */
+
+int IAP::read_serial( void ) {
+    IAP_command[ 0 ]    = IAPCommand_Read_device_serial_number;
+    
+    iap_entry( IAP_command, IAP_result );
+    
+    //  return ( (int)IAP_result[ 0 ] );
+    return ( (int)IAP_result[ 1 ] );    //  to return the number itself (this command always returns CMD_SUCCESS)
+}
+
+
+/** Blank check sector(s)
+ *  
+ *  @param    start    a Start Sector Number
+ *  @param    end      an End Sector Number (should be greater than or equal to start sector number).
+ *  @return error code: CMD_SUCCESS | BUSY | SECTOR_NOT_BLANK | INVALID_SECTOR
+ */
+
+int IAP::blank_check( int start, int end ) {
+    IAP_command[ 0 ]    = IAPCommand_Blank_check_sector;
+    IAP_command[ 1 ]    = (unsigned int)start;  //  Start Sector Number
+    IAP_command[ 2 ]    = (unsigned int)end;    //  End Sector Number (should be greater than or equal to start sector number)
+
+    iap_entry( IAP_command, IAP_result );
+
+    return ( (int)IAP_result[ 0 ] );
+}
+
+
+/** Erase Sector(s)
+ *  
+ *  @param    start    a Start Sector Number
+ *  @param    end      an End Sector Number (should be greater than or equal to start sector number).
+ *  @return   error code: CMD_SUCCESS | BUSY | SECTOR_NOT_PREPARED_FOR_WRITE_OPERATION | INVALID_SECTOR
+ */
+
+int IAP::erase( int start, int end ) {
+    IAP_command[ 0 ]    = IAPCommand_Erase_sector;
+    IAP_command[ 1 ]    = (unsigned int)start;  //  Start Sector Number
+    IAP_command[ 2 ]    = (unsigned int)end;    //  End Sector Number (should be greater than or equal to start sector number)
+    IAP_command[ 3 ]    = cclk_kHz;             //  CPU Clock Frequency (CCLK) in kHz
+
+    iap_entry( IAP_command, IAP_result );
+
+    return ( (int)IAP_result[ 0 ] );
+}
+
+
+/** Prepare sector(s) for write operation
+ *  
+ *  @param    start    a Start Sector Number
+ *  @param    end      an End Sector Number (should be greater than or equal to start sector number).
+ *  @return   error code: CMD_SUCCESS | BUSY | INVALID_SECTOR
+ */
+
+int IAP::prepare( int start, int end ) {
+    IAP_command[ 0 ]    = IAPCommand_Prepare_sector_for_write_operation;
+    IAP_command[ 1 ]    = (unsigned int)start;  //  Start Sector Number
+    IAP_command[ 2 ]    = (unsigned int)end;    //  End Sector Number (should be greater than or equal to start sector number).
+    
+    iap_entry( IAP_command, IAP_result );
+    
+    return ( (int)IAP_result[ 0 ] );
+}
+
+
+/** Copy RAM to Flash
+ *  
+ *  @param    source_addr    Source RAM address from which data bytes are to be read. This address should be a word boundary.
+ *  @param    target_addr    Destination flash address where data bytes are to be written. This address should be a 256 byte boundary.
+ *  @param    size           Number of bytes to be written. Should be 256 | 512 | 1024 | 4096.
+ *  @return   error code: CMD_SUCCESS | SRC_ADDR_ERROR (Address not a word boundary) | DST_ADDR_ERROR (Address not on correct boundary) | SRC_ADDR_NOT_MAPPED | DST_ADDR_NOT_MAPPED | COUNT_ERROR (Byte count is not 256 | 512 | 1024 | 4096) | SECTOR_NOT_PREPARED_FOR_WRITE_OPERATION | BUSY
+ */
+
+int IAP::write( char *source_addr, char *target_addr, int size ) {
+    IAP_command[ 0 ]    = IAPCommand_Copy_RAM_to_Flash;
+    IAP_command[ 1 ]    = (unsigned int)target_addr;    //  Destination flash address where data bytes are to be written. This address should be a 256 byte boundary.
+    IAP_command[ 2 ]    = (unsigned int)source_addr;    //  Source RAM address from which data bytes are to be read. This address should be a word boundary.
+    IAP_command[ 3 ]    = size;                         //  Number of bytes to be written. Should be 256 | 512 | 1024 | 4096.
+    IAP_command[ 4 ]    = cclk_kHz;                     //  CPU Clock Frequency (CCLK) in kHz.
+
+    iap_entry( IAP_command, IAP_result );
+
+    return ( (int)IAP_result[ 0 ] );
+}
+
+
+/** Compare <address1> <address2> <no of bytes>
+ *  
+ *  @param    source_addr Starting flash or RAM address of data bytes to be compared. This address should be a word boundary.
+ *  @param    target_addr Starting flash or RAM address of data bytes to be compared. This address should be a word boundary.
+ *  @param    size         Number of bytes to be compared; should be a multiple of 4.
+ *  @return   error code: CMD_SUCCESS | COMPARE_ERROR | COUNT_ERROR (Byte count is not a multiple of 4) | ADDR_ERROR | ADDR_NOT_MAPPED     
+ */
+
+int IAP::compare( char *source_addr, char *target_addr, int size ) {
+    IAP_command[ 0 ]    = IAPCommand_Compare;
+    IAP_command[ 1 ]    = (unsigned int)target_addr;    //  Starting flash or RAM address of data bytes to be compared. This address should be a word boundary.
+    IAP_command[ 2 ]    = (unsigned int)source_addr;    //  Starting flash or RAM address of data bytes to be compared. This address should be a word boundary.
+    IAP_command[ 3 ]    = size;                         //  Number of bytes to be compared; should be a multiple of 4.
+
+    iap_entry( IAP_command, IAP_result );
+
+    return ( (int)IAP_result[ 0 ] );
+}
+
+
+/** Get user reserved flash start address
+ *
+ *  @return    start address of user reserved flash memory
+ *  @see       reserved_flash_area_size()
+ */
+
+char * IAP::reserved_flash_area_start( void )
+{
+    return ( (char *)USER_FLASH_AREA_START );
+}
+
+
+/** Get user reserved flash size
+ *
+ *  @return    size of user reserved flash memory
+ *  @see       reserved_flash_area_start()
+ */
+
+int IAP::reserved_flash_area_size( void )
+{
+    return ( USER_FLASH_AREA_SIZE );
+}
+
+#if defined(TARGET_LPC11U24)
+/** Copy RAM to EEPROM (LPC11U24)
+ *  
+ *  @param    source_addr    Source RAM address from which data bytes are to be read.
+ *  @param    target_addr    Destination EEPROM address where data bytes are to be written.
+ *  @param    size           Number of bytes to be written.
+ *  @return   error code: CMD_SUCCESS | SRC_ADDR_NOT_MAPPED | DST_ADDR_NOT_MAPPED
+ *  Remark: The top 64 bytes of the EEPROM memory are reserved and cannot be written to.
+ */
+int IAP::write_eeprom( char *source_addr, char *target_addr, int size ) {
+    IAP_command[ 0 ]    = IAPCommand_EEPROM_Write;
+    IAP_command[ 1 ]    = (unsigned int)target_addr;    //  Destination EEPROM address where data bytes are to be written. This address should be a 256 byte boundary.
+    IAP_command[ 2 ]    = (unsigned int)source_addr;    //  Source RAM address from which data bytes are to be read. This address should be a word boundary.
+    IAP_command[ 3 ]    = size;                         //  Number of bytes to be written. Should be 256 | 512 | 1024 | 4096.
+    IAP_command[ 4 ]    = cclk_kHz;                     //  CPU Clock Frequency (CCLK) in kHz.
+
+    iap_entry( IAP_command, IAP_result );
+
+    return ( (int)IAP_result[ 0 ] );
+}
+
+/** Copy EEPROM to RAM (LPC11U24)
+ *  
+ *  @param    source_addr    Source EEPROM address from which data bytes are to be read.
+ *  @param    target_addr    Destination RAM address where data bytes are to be written.
+ *  @param    size           Number of bytes to be written.
+ *  @return   error code: CMD_SUCCESS | SRC_ADDR_NOT_MAPPED | DST_ADDR_NOT_MAPPED
+ *  Remark: The top 64 bytes of the EEPROM memory are reserved and cannot be written to.
+ */
+int IAP::read_eeprom( char *source_addr, char *target_addr, int size ) {
+    IAP_command[ 0 ]    = IAPCommand_EEPROM_Read;
+    IAP_command[ 1 ]    = (unsigned int)source_addr;    //  Source EEPROM address from which data bytes are to be read. This address should be a word boundary.
+    IAP_command[ 2 ]    = (unsigned int)target_addr;    //  Destination RAM address where data bytes are to be written. This address should be a 256 byte boundary.
+    IAP_command[ 3 ]    = size;                         //  Number of bytes to be written. Should be 256 | 512 | 1024 | 4096.
+    IAP_command[ 4 ]    = cclk_kHz;                     //  CPU Clock Frequency (CCLK) in kHz.
+
+    iap_entry( IAP_command, IAP_result );
+
+    return ( (int)IAP_result[ 0 ] );
+}
+#endif

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/IAP.h	Fri Sep 26 09:22:57 2014 +0000
@@ -0,0 +1,237 @@
+/**    IAP : internal Flash memory access library
+ *
+ *        The internal Flash memory access is described in the LPC1768 usermanual. 
+ *            http://www.nxp.com/documents/user_manual/UM10360.pdf
+ *
+ *            Chapter  2: "LPC17xx Memory map"
+ *            Chapter 32: "LPC17xx Flash memory interface and programming"
+ *                refering Rev. 01 - 4 January 2010
+ *
+ *        Released under the MIT License: http://mbed.org/license/mit
+ *
+ *        revision 1.0  09-Mar-2010   1st release
+ *        revision 1.1  12-Mar-2010   chaged: to make possible to reserve flash area for user
+ *                                            it can be set by USER_FLASH_AREA_START and USER_FLASH_AREA_SIZE in IAP.h
+ *
+ *     by Tedd OKANO http://mbed.org/users/okano/notebook/iap-in-application-programming-internal-flash-eras/
+ *     modified by Suga (supported to LPC11U24)
+ */
+
+#ifndef        MBED_IAP
+#define        MBED_IAP
+
+#include    "mbed.h"
+
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+#define     USER_FLASH_AREA_START   FLASH_SECTOR_29
+#define     USER_FLASH_AREA_SIZE    (FLASH_SECTOR_SIZE_16_TO_29 * 1)
+#elif defined(TARGET_LPC11U24)
+#define     USER_FLASH_AREA_START   FLASH_SECTOR_7
+#define     USER_FLASH_AREA_SIZE    (FLASH_SECTOR_SIZE_0_TO_15 * 1)
+#endif
+
+/*
+ *  memory map information is available in next URL also.
+ *    http://mbed.org/projects/libraries/svn/mbed/trunk/LPC1768/LPC17xx.h
+ */
+ 
+/**    Table for start adress of sectors
+ *    
+ *        LPC1768 internal flash memory sector numbers and addresses
+ *
+ *        LPC1768 flash memory are and sector number/size
+ *        Table 568 "Sectors in a LPC17xx device", Section 5. "Sector numbers", usermanual
+ *
+ *        0x00000000 - 0x0007FFFF        flash (29 sectors)
+ *
+ *      Sector0:     0x00000000 - 0x00000FFF        4K
+ *      Sector1:     0x00001000 - 0x00001FFF        4K
+ *      Sector2:     0x00002000 - 0x00002FFF        4K
+ *      Sector3:     0x00003000 - 0x00003FFF        4K
+ *      Sector4:     0x00004000 - 0x00004FFF        4K
+ *      Sector5:     0x00005000 - 0x00005FFF        4K
+ *      Sector6:     0x00006000 - 0x00006FFF        4K
+ *      Sector7:     0x00007000 - 0x00007FFF        4K
+ *      Sector8:     0x00008000 - 0x00008FFF        4K
+ *      Sector9:     0x00009000 - 0x00009FFF        4K
+ *      Sector10:    0x0000A000 - 0x0000AFFF        4K
+ *      Sector11:    0x0000B000 - 0x0000BFFF        4K
+ *      Sector12:    0x0000C000 - 0x0000CFFF        4K
+ *      Sector13:    0x0000D000 - 0x0000DFFF        4K
+ *      Sector14:    0x0000E000 - 0x0000EFFF        4K
+ *      Sector15:    0x0000F000 - 0x0000FFFF        4K
+ *
+ *      Sector16:    0x00010000 - 0x00017FFF        32K
+ *      Sector17:    0x00018000 - 0x0001FFFF        32K
+ *      Sector18:    0x00020000 - 0x00027FFF        32K
+ *      Sector19:    0x00028000 - 0x0002FFFF        32K
+ *      Sector20:    0x00030000 - 0x00037FFF        32K
+ *      Sector21:    0x00038000 - 0x0003FFFF        32K
+ *      Sector22:    0x00040000 - 0x00047FFF        32K
+ *      Sector23:    0x00048000 - 0x0004FFFF        32K
+ *      Sector24:    0x00050000 - 0x00057FFF        32K
+ *      Sector25:    0x00058000 - 0x0005FFFF        32K
+ *      Sector26:    0x00060000 - 0x00067FFF        32K
+ *      Sector27:    0x00068000 - 0x0006FFFF        32K
+ *      Sector28:    0x00070000 - 0x00077FFF        32K
+ *      Sector29:    0x00078000 - 0x0007FFFF        32K
+ */
+ 
+#define     FLASH_SECTOR_0       0x00000000
+#define     FLASH_SECTOR_1       0x00001000
+#define     FLASH_SECTOR_2       0x00002000
+#define     FLASH_SECTOR_3       0x00003000
+#define     FLASH_SECTOR_4       0x00004000
+#define     FLASH_SECTOR_5       0x00005000
+#define     FLASH_SECTOR_6       0x00006000
+#define     FLASH_SECTOR_7       0x00007000
+#define     FLASH_SECTOR_8       0x00008000
+#define     FLASH_SECTOR_9       0x00009000
+#define     FLASH_SECTOR_10      0x0000A000
+#define     FLASH_SECTOR_11      0x0000B000
+#define     FLASH_SECTOR_12      0x0000C000
+#define     FLASH_SECTOR_13      0x0000D000
+#define     FLASH_SECTOR_14      0x0000E000
+#define     FLASH_SECTOR_15      0x0000F000
+#define     FLASH_SECTOR_16      0x00010000
+#define     FLASH_SECTOR_17      0x00018000
+#define     FLASH_SECTOR_18      0x00020000
+#define     FLASH_SECTOR_19      0x00028000
+#define     FLASH_SECTOR_20      0x00030000
+#define     FLASH_SECTOR_21      0x00038000
+#define     FLASH_SECTOR_22      0x00040000
+#define     FLASH_SECTOR_23      0x00048000
+#define     FLASH_SECTOR_24      0x00050000
+#define     FLASH_SECTOR_25      0x00058000
+#define     FLASH_SECTOR_26      0x00060000
+#define     FLASH_SECTOR_27      0x00068000
+#define     FLASH_SECTOR_28      0x00070000
+#define     FLASH_SECTOR_29      0x00078000
+
+#define     FLASH_SECTOR_SIZE_0_TO_15    ( 4 * 1024)
+#define     FLASH_SECTOR_SIZE_16_TO_29   (32 * 1024)
+
+static char * sector_start_adress[]    = {
+    (char *)FLASH_SECTOR_0,
+    (char *)FLASH_SECTOR_1,
+    (char *)FLASH_SECTOR_2,
+    (char *)FLASH_SECTOR_3,
+    (char *)FLASH_SECTOR_4,
+    (char *)FLASH_SECTOR_5,
+    (char *)FLASH_SECTOR_6,
+    (char *)FLASH_SECTOR_7,
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    (char *)FLASH_SECTOR_8,
+    (char *)FLASH_SECTOR_9,
+    (char *)FLASH_SECTOR_10,
+    (char *)FLASH_SECTOR_11,
+    (char *)FLASH_SECTOR_12,
+    (char *)FLASH_SECTOR_13,
+    (char *)FLASH_SECTOR_14,
+    (char *)FLASH_SECTOR_15,
+    (char *)FLASH_SECTOR_16,
+    (char *)FLASH_SECTOR_17,
+    (char *)FLASH_SECTOR_18,
+    (char *)FLASH_SECTOR_19,
+    (char *)FLASH_SECTOR_20,
+    (char *)FLASH_SECTOR_21,
+    (char *)FLASH_SECTOR_22,
+    (char *)FLASH_SECTOR_23,
+    (char *)FLASH_SECTOR_24,
+    (char *)FLASH_SECTOR_25,
+    (char *)FLASH_SECTOR_26,
+    (char *)FLASH_SECTOR_27,
+    (char *)FLASH_SECTOR_28,
+    (char *)FLASH_SECTOR_29    
+#endif
+};
+
+
+/**    Error code by IAP routine
+ *  
+ *        Table 588 "ISP Return Codes Summary", Section 7.15 "ISP Return Codes", usermanual
+ */
+
+enum error_code
+    {
+            CMD_SUCCESS,
+            INVALID_COMMAND,
+            SRC_ADDR_ERROR,
+            DST_ADDR_ERROR,
+            SRC_ADDR_NOT_MAPPED,
+            DST_ADDR_NOT_MAPPED,
+            COUNT_ERROR,
+            INVALID_SECTOR,
+            SECTOR_NOT_BLANK,
+            SECTOR_NOT_PREPARED_FOR_WRITE_OPERATION,
+            COMPARE_ERROR,
+            BUSY,
+            PARAM_ERROR,
+            ADDR_ERROR,
+            ADDR_NOT_MAPPED,
+            CMD_LOCKED,
+            INVALID_CODE,
+            INVALID_BAUD_RATE,
+            INVALID_STOP_BIT,
+            CODE_READ_PROTECTION_ENABLED
+    };
+
+
+
+/*
+ *  IAP routine entry
+ *
+ *        Chapter 8. "IAP commands", usermanual
+ */
+
+#define     IAP_LOCATION    0x1fff1ff1
+typedef     void (*IAP_call)(unsigned int [], unsigned int []);
+
+/**    IAP class
+ *  
+ *        Interface for internal flash memory access
+ */
+
+
+class IAP {
+public:
+
+    /*
+     *  SystemCoreClock ??? :  
+     *    http://mbed.org/forum/mbed/topic/229/
+     *    http://mbed.org/users/simon/programs/SystemCoreClock/16mhsh/
+     */
+
+    
+    /**    Constructor for IAP
+     *
+     */
+
+    IAP() : iap_entry( reinterpret_cast<IAP_call>(IAP_LOCATION) ), cclk_kHz( SystemCoreClock / 1000 ) {}
+    int read_ID( void );
+    int read_serial( void );
+    int blank_check( int start, int end );
+    int erase( int start, int end );
+    int prepare( int start, int end );
+    int write( char *source_addr, char *target_addr, int size );
+    int compare( char *source_addr, char *target_addr, int size );
+    
+    char *reserved_flash_area_start( void );
+    int   reserved_flash_area_size( void );
+
+#if defined(TARGET_LPC11U24)
+    int write_eeprom( char *source_addr, char *target_addr, int size );
+    int read_eeprom( char *source_addr, char *target_addr, int size );
+#endif
+
+private:
+    IAP_call        iap_entry;
+    unsigned int    IAP_command[ 5 ];
+    unsigned int    IAP_result[ 5 ];
+    int             cclk_kHz;
+    
+    //int cpu_clock( void );
+}
+;
+
+#endif    //  #ifndef  MBED_IAP

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TextLCD.lib	Fri Sep 26 09:22:57 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/simon/code/TextLCD/#0bffc59d590b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TextLCD/TextLCD.cpp	Fri Sep 26 09:22:57 2014 +0000
@@ -0,0 +1,159 @@
+/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
+ * Copyright (c) 2007-2010, sford, http://mbed.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "TextLCD.h"
+#include "mbed.h"
+
+TextLCD::TextLCD(PinName rs, PinName e, PinName d0, PinName d1,
+                 PinName d2, PinName d3, LCDType type) : _rs(rs),
+        _e(e), _d(d0, d1, d2, d3),
+        _type(type) {
+
+    _e  = 1;
+    _rs = 0;            // command mode
+
+    wait(0.015);        // Wait 15ms to ensure powered up
+
+    // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
+    for (int i=0; i<3; i++) {
+        writeByte(0x3);
+        wait(0.00164);  // this command takes 1.64ms, so wait for it
+    }
+    writeByte(0x2);     // 4-bit mode
+    wait(0.000040f);    // most instructions take 40us
+
+    writeCommand(0x28); // Function set 001 BW N F - -
+    writeCommand(0x0C);
+    writeCommand(0x6);  // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
+    cls();
+}
+
+void TextLCD::character(int column, int row, int c) {
+    int a = address(column, row);
+    writeCommand(a);
+    writeData(c);
+}
+
+void TextLCD::cls() {
+    writeCommand(0x01); // cls, and set cursor to 0
+    wait(0.00164f);     // This command takes 1.64 ms
+    locate(0, 0);
+}
+
+void TextLCD::locate(int column, int row) {
+    _column = column;
+    _row = row;
+}
+
+int TextLCD::_putc(int value) {
+    if (value == '\n') {
+        _column = 0;
+        _row++;
+        if (_row >= rows()) {
+            _row = 0;
+        }
+    } else {
+        character(_column, _row, value);
+        _column++;
+        if (_column >= columns()) {
+            _column = 0;
+            _row++;
+            if (_row >= rows()) {
+                _row = 0;
+            }
+        }
+    }
+    return value;
+}
+
+int TextLCD::_getc() {
+    return -1;
+}
+
+void TextLCD::writeByte(int value) {
+    _d = value >> 4;
+    wait(0.000040f); // most instructions take 40us
+    _e = 0;
+    wait(0.000040f);
+    _e = 1;
+    _d = value >> 0;
+    wait(0.000040f);
+    _e = 0;
+    wait(0.000040f);  // most instructions take 40us
+    _e = 1;
+}
+
+void TextLCD::writeCommand(int command) {
+    _rs = 0;
+    writeByte(command);
+}
+
+void TextLCD::writeData(int data) {
+    _rs = 1;
+    writeByte(data);
+}
+
+int TextLCD::address(int column, int row) {
+    switch (_type) {
+        case LCD20x4:
+            switch (row) {
+                case 0:
+                    return 0x80 + column;
+                case 1:
+                    return 0xc0 + column;
+                case 2:
+                    return 0x94 + column;
+                case 3:
+                    return 0xd4 + column;
+            }
+        case LCD16x2B:
+            return 0x80 + (row * 40) + column;
+        case LCD16x2:
+        case LCD20x2:
+        default:
+            return 0x80 + (row * 0x40) + column;
+    }
+}
+
+int TextLCD::columns() {
+    switch (_type) {
+        case LCD20x4:
+        case LCD20x2:
+            return 20;
+        case LCD16x2:
+        case LCD16x2B:
+        default:
+            return 16;
+    }
+}
+
+int TextLCD::rows() {
+    switch (_type) {
+        case LCD20x4:
+            return 4;
+        case LCD16x2:
+        case LCD16x2B:
+        case LCD20x2:
+        default:
+            return 2;
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TextLCD/TextLCD.h	Fri Sep 26 09:22:57 2014 +0000
@@ -0,0 +1,111 @@
+/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
+ * Copyright (c) 2007-2010, sford, http://mbed.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MBED_TEXTLCD_H
+#define MBED_TEXTLCD_H
+
+#include "mbed.h"
+
+/** A TextLCD interface for driving 4-bit HD44780-based LCDs
+ *
+ * Currently supports 16x2, 20x2 and 20x4 panels
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "TextLCD.h"
+ * 
+ * TextLCD lcd(p10, p12, p15, p16, p29, p30); // rs, e, d0-d3
+ * 
+ * int main() {
+ *     lcd.printf("Hello World!\n");
+ * }
+ * @endcode
+ */
+class TextLCD : public Stream {
+public:
+
+    /** LCD panel format */
+    enum LCDType {
+        LCD16x2     /**< 16x2 LCD panel (default) */
+        , LCD16x2B  /**< 16x2 LCD panel alternate addressing */
+        , LCD20x2   /**< 20x2 LCD panel */
+        , LCD20x4   /**< 20x4 LCD panel */
+    };
+
+    /** Create a TextLCD interface
+     *
+     * @param rs    Instruction/data control line
+     * @param e     Enable line (clock)
+     * @param d0-d3 Data lines
+     * @param type  Sets the panel size/addressing mode (default = LCD16x2)
+     */
+    TextLCD(PinName rs, PinName e, PinName d0, PinName d1, PinName d2, PinName d3, LCDType type = LCD16x2);
+
+#if DOXYGEN_ONLY
+    /** Write a character to the LCD
+     *
+     * @param c The character to write to the display
+     */
+    int putc(int c);
+
+    /** Write a formated string to the LCD
+     *
+     * @param format A printf-style format string, followed by the
+     *               variables to use in formating the string.
+     */
+    int printf(const char* format, ...);
+#endif
+
+    /** Locate to a screen column and row
+     *
+     * @param column  The horizontal position from the left, indexed from 0
+     * @param row     The vertical position from the top, indexed from 0
+     */
+    void locate(int column, int row);
+
+    /** Clear the screen and locate to 0,0 */
+    void cls();
+
+    int rows();
+    int columns();
+
+protected:
+
+    // Stream implementation functions
+    virtual int _putc(int value);
+    virtual int _getc();
+
+    int address(int column, int row);
+    void character(int column, int row, int c);
+    void writeByte(int value);
+    void writeCommand(int command);
+    void writeData(int data);
+
+    DigitalOut _rs, _e;
+    BusOut _d;
+    LCDType _type;
+
+    int _column;
+    int _row;
+};
+
+#endif

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Sep 26 09:22:57 2014 +0000
@@ -0,0 +1,156 @@
+
+
+#include "mbed.h"
+#include    "IAP.h"
+#include "TextLCD.h"
+#include "stdlib.h"
+#include <stdio.h>
+
+#define     FLOAT_SIZE        4
+#define     TARGET_ADDRESS   64
+#define     NEXT_PLACE 1
+#define     PLACE   0
+
+IAP     iap;
+float getEepromFloat(int place);
+void teletype(char* text, int row);
+
+typedef char * string;
+
+// ====== Pins =========
+
+DigitalOut gLED(P1_18);
+DigitalOut rLED(P1_24);
+
+
+TextLCD lcd(P1_22, P1_14, P0_9, P0_8, P1_21, P1_2); // rs, e, d4-d7
+
+
+//Tie unused analogue pins LOW
+
+DigitalOut a1(P0_15);
+DigitalOut a2(P0_16);
+DigitalOut a3(P0_22);
+DigitalOut a4(P0_23);
+
+// ====== Variables =========
+
+float test_float = 12.5;
+float display_float = 0.0;
+
+int twodp =0;
+
+float _ON;
+float _OFF;
+
+float calib;
+float voltage;
+float displayVoltage;
+float displaySet;
+
+float difference = 0;
+float calibrate=0.0;
+
+
+
+
+// ====== CODE BEGINS=========
+
+typedef union _data {
+    float f;
+    char  s[4];
+} myData;
+
+
+float getEepromFloat(int place)
+{
+    myData returnedFloat;
+    char someBytes[4];
+
+    iap.read_eeprom( (char*)(TARGET_ADDRESS+(place*4)), someBytes, FLOAT_SIZE );
+
+    returnedFloat.s[0] = someBytes[0];
+    returnedFloat.s[1] = someBytes[1];
+    returnedFloat.s[2] = someBytes[2];
+    returnedFloat.s[3] = someBytes[3];
+    return returnedFloat.f;
+
+}
+
+void setEepromFloat(int place, float incomingFloat)
+{
+    char theBytes[4];
+    myData aFloat;
+
+    aFloat.f = incomingFloat;
+
+    theBytes[0] = aFloat.s[0];
+    theBytes[1] = aFloat.s[1];
+    theBytes[2] = aFloat.s[2];
+    theBytes[3] = aFloat.s[3];
+
+    iap.write_eeprom( theBytes, (char*) (TARGET_ADDRESS+(place*4)), FLOAT_SIZE );
+
+}
+
+
+int main()
+{
+
+    teletype("Hello", 0);
+    float aValue=0.0;
+    float theReturned=99.99;
+    
+    while (1) {
+                wait(2.0);
+                
+                aValue++;     // increment it
+                
+                setEepromFloat(PLACE,aValue);         //put it in place 0 (Global variable)
+                        
+                theReturned = getEepromFloat(PLACE); //get it back
+                
+                lcd.cls();
+                teletype("Value: %f", theReturned);  //output it to the screen
+                
+
+    };
+}
+
+
+
+
+char* left(string Source,int NewLen)
+{
+
+    char* result;
+    char* temp;
+    if (NewLen <=0)
+        NewLen =1; /* Minimum length */
+
+    result = (char*)malloc(NewLen + 1); /* +1 = DFTTZ! */
+    *result=' ';   /* default for unassigned strings */
+    temp=result;
+    if (Source && *Source) { /* don't copy an empty string */
+        while (NewLen-- >0)
+            *temp++=*Source++;
+    } else temp++;
+    *temp='\0';
+    return result;
+}
+
+void teletype(char* text, int row)
+{
+    lcd.locate(0,row);
+    lcd.printf("                ");
+
+    int whole=strlen(text);
+
+    for (int i=1; i<=whole; i++) {
+        lcd.locate(0,row);
+        lcd.printf(left(text,i));
+        wait(0.15);
+    }
+}
+
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri Sep 26 09:22:57 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/e2ed12d17f06
\ No newline at end of file