IAP_internal_flash_write - Sample code for how to erase/write LPC1768, LPC11…

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Tedd OKANO / Mbed 2 deprecated IAP_internal_flash_write

Sample code for how to erase/write LPC1768, LPC11U24, LPC1114, LPC812 and LPC824 internal flash memory. This program uses IAP call of MCU's ROM routines. The IAP library also supports read/write of EEPROM in LPC11U24.

Dependencies: mbed IAP

Sample code for how to erase/write LPC1768, LPC11U24, LPC1114, LPC812 and LPC824 internal flash memory. This program uses IAP call of MCU's ROM routines.

No filesystem interface available. This program is just an interface to flash erasing and writing. User need manage where to store the data in the flash area.

This IAP library supports read/write of EEPROM in LPC11U24.

More information available in
http://mbed.org/users/okano/notebook/iap-in-application-programming-internal-flash-eras/

main.cpp@0:b802bd2f4cc9, 2010-03-12 (annotated)

Committer:: okano
Date:: Fri Mar 12 10:24:57 2010 +0000
Revision:: 0:b802bd2f4cc9
Child:: 1:a85b51eeb446

Who changed what in which revision?

User	Revision	Line number	New contents of line
okano	0:b802bd2f4cc9	1	/** IAP demo : demo code for internal Flash memory access library
okano	0:b802bd2f4cc9	2	*
okano	0:b802bd2f4cc9	3	* The internal Flash memory access is described in the LPC1768 usermanual.
okano	0:b802bd2f4cc9	4	* http://www.nxp.com/documents/user_manual/UM10360.pdf
okano	0:b802bd2f4cc9	5	*
okano	0:b802bd2f4cc9	6	* Chapter 2: "LPC17xx Memory map"
okano	0:b802bd2f4cc9	7	* Chapter 32: "LPC17xx Flash memory interface and programming"
okano	0:b802bd2f4cc9	8	* refering Rev. 01 - 4 January 2010
okano	0:b802bd2f4cc9	9	*
okano	0:b802bd2f4cc9	10	* This main.cpp demonstrates how the flash can be erased and wrote.
okano	0:b802bd2f4cc9	11	*
okano	0:b802bd2f4cc9	12	* This program tries to...
okano	0:b802bd2f4cc9	13	* 0. read device ID and serial#
okano	0:b802bd2f4cc9	14	* 1. check if the targat sector blank
okano	0:b802bd2f4cc9	15	* 2. erase the sector if it was not blank
okano	0:b802bd2f4cc9	16	* 3. write into the flash (prepare before write)
okano	0:b802bd2f4cc9	17	* 4. verify the data by IAP command
okano	0:b802bd2f4cc9	18	* 5. show the content of the flash
okano	0:b802bd2f4cc9	19	*
okano	0:b802bd2f4cc9	20	* The Flash must be erased as sectors. No overwrite can be done like SRAM.
okano	0:b802bd2f4cc9	21	* So erase should be done in size of 4K or 32K.
okano	0:b802bd2f4cc9	22	*
okano	0:b802bd2f4cc9	23	* Writing sector can be done with size of 256, 512, 1024 or 4096.
okano	0:b802bd2f4cc9	24	* If other size is used, the IAP returns an error.
okano	0:b802bd2f4cc9	25	* The SRAM memory should be allocated in
okano	0:b802bd2f4cc9	26	*
okano	0:b802bd2f4cc9	27	*
okano	0:b802bd2f4cc9	28	* Released under the MIT License: http://mbed.org/license/mit
okano	0:b802bd2f4cc9	29	*
okano	0:b802bd2f4cc9	30	* revision 1.0 09-Mar-2010 1st release
okano	0:b802bd2f4cc9	31	* revision 1.1 12-Mar-2010 chaged: to make possible to reserve flash area for user
okano	0:b802bd2f4cc9	32	* it can be set by USER_FLASH_AREA_START and USER_FLASH_AREA_SIZE in IAP.h
okano	0:b802bd2f4cc9	33	*/
okano	0:b802bd2f4cc9	34
okano	0:b802bd2f4cc9	35	#include "mbed.h"
okano	0:b802bd2f4cc9	36	#include "IAP.h"
okano	0:b802bd2f4cc9	37
okano	0:b802bd2f4cc9	38	#define MEM_SIZE 256
okano	0:b802bd2f4cc9	39	#define TARGET_SECTOR 29
okano	0:b802bd2f4cc9	40
okano	0:b802bd2f4cc9	41	void memdump( char *p, int n );
okano	0:b802bd2f4cc9	42	int isprint( int c );
okano	0:b802bd2f4cc9	43
okano	0:b802bd2f4cc9	44	IAP iap;
okano	0:b802bd2f4cc9	45
okano	0:b802bd2f4cc9	46
okano	0:b802bd2f4cc9	47	int main() {
okano	0:b802bd2f4cc9	48	char mem[ MEM_SIZE ]; // memory, it should be aligned to word boundary
okano	0:b802bd2f4cc9	49	int r;
okano	0:b802bd2f4cc9	50
okano	0:b802bd2f4cc9	51	printf( "IAP: Flash memory writing test\n" );
okano	0:b802bd2f4cc9	52	printf( " device-ID = 0x%08X, serial# = 0x%08X, CPU running %dkHz\n", iap.read_ID(), iap.read_serial(), SystemCoreClock / 1000 );
okano	0:b802bd2f4cc9	53	printf( " user reserved flash area: start_address=0x%08X, size=%d bytes\n", iap.reserved_flash_area_start(), iap.reserved_flash_area_size() );
okano	0:b802bd2f4cc9	54
okano	0:b802bd2f4cc9	55	for ( int i = 0; i < MEM_SIZE; i++ )
okano	0:b802bd2f4cc9	56	mem[ i ] = i & 0xFF;
okano	0:b802bd2f4cc9	57
okano	0:b802bd2f4cc9	58	// blank check: The mbed will erase all flash contents after downloading new executable
okano	0:b802bd2f4cc9	59
okano	0:b802bd2f4cc9	60	r = iap.blank_check( TARGET_SECTOR, TARGET_SECTOR );
okano	0:b802bd2f4cc9	61	printf( "blank check result = 0x%08X\n", r );
okano	0:b802bd2f4cc9	62
okano	0:b802bd2f4cc9	63	// erase sector, if required
okano	0:b802bd2f4cc9	64
okano	0:b802bd2f4cc9	65	if ( r == SECTOR_NOT_BLANK ) {
okano	0:b802bd2f4cc9	66	iap.prepare( TARGET_SECTOR, TARGET_SECTOR );
okano	0:b802bd2f4cc9	67	r = iap.erase( TARGET_SECTOR, TARGET_SECTOR );
okano	0:b802bd2f4cc9	68	printf( "erase result = 0x%08X\n", r );
okano	0:b802bd2f4cc9	69	}
okano	0:b802bd2f4cc9	70
okano	0:b802bd2f4cc9	71	// copy RAM to Flash
okano	0:b802bd2f4cc9	72
okano	0:b802bd2f4cc9	73	iap.prepare( TARGET_SECTOR, TARGET_SECTOR );
okano	0:b802bd2f4cc9	74	r = iap.write( mem, sector_start_adress[ TARGET_SECTOR ], MEM_SIZE );
okano	0:b802bd2f4cc9	75	printf( "copied: SRAM(0x%08X)->Flash(0x%08X) for %d bytes. (result=0x%08X)\n", mem, sector_start_adress[ TARGET_SECTOR ], MEM_SIZE, r );
okano	0:b802bd2f4cc9	76
okano	0:b802bd2f4cc9	77	// compare
okano	0:b802bd2f4cc9	78
okano	0:b802bd2f4cc9	79	r = iap.compare( mem, sector_start_adress[ TARGET_SECTOR ], MEM_SIZE );
okano	0:b802bd2f4cc9	80	printf( "compare result = \"%s\"\n", r ? "FAILED" : "OK" );
okano	0:b802bd2f4cc9	81
okano	0:b802bd2f4cc9	82	//#define WRITE_NEXT_BLOCK
okano	0:b802bd2f4cc9	83	#ifdef WRITE_NEXT_BLOCK
okano	0:b802bd2f4cc9	84
okano	0:b802bd2f4cc9	85	// copy RAM to Flash
okano	0:b802bd2f4cc9	86
okano	0:b802bd2f4cc9	87	iap.prepare( TARGET_SECTOR, TARGET_SECTOR );
okano	0:b802bd2f4cc9	88	r = iap.write( mem, sector_start_adress[ TARGET_SECTOR ] + 256, MEM_SIZE );
okano	0:b802bd2f4cc9	89	printf( "copied: SRAM(0x%08X)->Flash(0x%08X) for %d bytes. (result=0x%08X)\n", mem, sector_start_adress[ TARGET_SECTOR ], MEM_SIZE, r );
okano	0:b802bd2f4cc9	90
okano	0:b802bd2f4cc9	91	// compare
okano	0:b802bd2f4cc9	92
okano	0:b802bd2f4cc9	93	r = iap.compare( mem, sector_start_adress[ TARGET_SECTOR ] + 256, MEM_SIZE );
okano	0:b802bd2f4cc9	94	printf( "compare result = \"%s\"\n", r ? "FAILED" : "OK" );
okano	0:b802bd2f4cc9	95
okano	0:b802bd2f4cc9	96	#endif
okano	0:b802bd2f4cc9	97
okano	0:b802bd2f4cc9	98	printf( "showing the flash contents...\n" );
okano	0:b802bd2f4cc9	99	memdump( sector_start_adress[ TARGET_SECTOR ], MEM_SIZE * 3 );
okano	0:b802bd2f4cc9	100	}
okano	0:b802bd2f4cc9	101
okano	0:b802bd2f4cc9	102
okano	0:b802bd2f4cc9	103	void memdump( char *base, int n ) {
okano	0:b802bd2f4cc9	104	unsigned int *p;
okano	0:b802bd2f4cc9	105
okano	0:b802bd2f4cc9	106	printf( " memdump from 0x%08X for %d bytes", (unsigned long)base, n );
okano	0:b802bd2f4cc9	107
okano	0:b802bd2f4cc9	108	p = (unsigned int *)((unsigned int)base & ~(unsigned int)0x3);
okano	0:b802bd2f4cc9	109
okano	0:b802bd2f4cc9	110	for ( int i = 0; i < (n >> 2); i++, p++ ) {
okano	0:b802bd2f4cc9	111	if ( !(i % 4) )
okano	0:b802bd2f4cc9	112	printf( "\n 0x%08X :", (unsigned int)p );
okano	0:b802bd2f4cc9	113
okano	0:b802bd2f4cc9	114	printf( " 0x%08X", *p );
okano	0:b802bd2f4cc9	115	}
okano	0:b802bd2f4cc9	116
okano	0:b802bd2f4cc9	117	printf( "\n" );
okano	0:b802bd2f4cc9	118	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	12 Mar 2010
Imports:	1534
Forks:	0
Commits:	10
Dependents:	0
Dependencies:	2
Followers:	22
Issues:	0

The code in this repository is MIT licensed.

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IAP (In-Application Programming)

main.cpp@0:b802bd2f4cc9, 2010-03-12 (annotated)

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