drivers/ecos_lpc2138_sja1000/lpc2138.c
author lbessard
Wed, 10 Jan 2007 17:42:34 +0100
changeset 64 c72dd78e547f
parent 0 4472ee7c6c3e
permissions -rw-r--r--
Bug reported by Dean corrected
0
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/*
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This file is part of CanFestival, a library implementing CanOpen Stack.
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 Author: Christian Fortin (canfestival@canopencanada.ca)
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See COPYING file for copyrights details.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "applicfg.h"
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// #include "objdictdef.h"
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#include "lpc2138_pinout.h"
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#include "lpc2138_defs.h"
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#include "lpc2138.h"
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#define IAP_LOCATION    0x7ffffff1
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// define a page of data of 256 bytes
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//
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short          data_len; /* 0 to 256 bytes */
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unsigned int   *data_page = NULL;
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unsigned int   data_addr;
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// local definitons
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void ee_erase(unsigned int ,unsigned int[]);		//function erases EEPROM
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void ee_write_page(unsigned int);	//function adds a record in EEPROM
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void ee_read_page(unsigned int);	//function reads the latest valid record in EEPROM
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typedef void (*IAP)(unsigned int [],unsigned int[]);
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IAP iap_entry;
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/***************************************************************************************/
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void lpc2138_pinsel_set(int pin, LPC2138_PORT port, int size, int func) 
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{
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    int i;
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    for (i = 0; i < size; pin++, i++) 
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    {
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        /* 2 bits par broche. */
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        int shift = (pin - ((pin < 16) ? 0 : 16)) << 1;
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        REG32_ADDR pinsel = (port == 1) ?
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            (REG32_ADDR) P1_PINSEL2_ADDR : ((pin < 16) ?
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                (REG32_ADDR) P0_PINSEL0_ADDR : (REG32_ADDR) P0_PINSEL1_ADDR);
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        *pinsel = (*pinsel & ~(BITMASK_2 << shift)) | (func << shift);
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    }
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}
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void lpc2138_pinsel_clear() 
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{
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    P0_PINSEL0 = 0x00000000;
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    P0_PINSEL1 = 0x00000000;
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    P1_PINSEL2 = 0x00000000;
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}
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int lpc2138_printf(void) 
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{
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    return lpc2138_fprintf(stdout);
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}
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int lpc2138_printf_pins(void) 
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{
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    return lpc2138_fprintf_pins(stdout);
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}
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int lpc2138_fprintf(FILE *stream) 
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{
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    return fprintf(stream,
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        "[p0=0x%08X,p0_iodir=0x%08X,p0_pinsel0=0x%08X,p0_pinsel1=0x%08X," \
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        "p1=0x%08X,p1_iodir=0x%08X,p1_pinsel2=0x%08X]",
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        P0_IOPIN, P0_IODIR, P0_PINSEL0, P0_PINSEL1,
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        P1_IOPIN, P1_IODIR, P1_PINSEL2);
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}
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int lpc2138_fprintf_pins(FILE *stream) 
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{
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    return fprintf(stream,
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        "[cs_s1d13706=0x%X," \
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        "cs_sja1000=0x%X," \
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        "wait=0x%X," \
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        "bhe=0x%X," \
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        "interrupt_sja1000=0x%X," \
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        "redgreenled=0x%X," \
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        "ale=0x%X," \
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        "rd=0x%X," \
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        "wr=0x%X," \
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        "data=0x%X," \
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        "addresses=0x%X]",
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        lpc2138_cs_s1d13706_get(),
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        lpc2138_cs_sja1000_get(),
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        lpc2138_wait_get(),
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        lpc2138_bhe_get(),
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        lpc2138_redgreenled_get(),
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        lpc2138_interrupt_sja1000_get(),
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        lpc2138_ale_get(),
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        lpc2138_rd_get(),
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        lpc2138_wr_get(),
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        lpc2138_data_get(),
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        lpc2138_addresses_get());
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}
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/*
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	SJA1000 interface
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*/
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unsigned char sja1000_read(unsigned char addr8)
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{
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    unsigned char data;
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    lpc2138_data_set_mode(LPC2138_MODE_OUTPUT);
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    lpc2138_ale_set(1);
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    lpc2138_data_set(addr8);
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    lpc2138_ale_set(0);
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    lpc2138_data_set_mode(LPC2138_MODE_INPUT);
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    lpc2138_cs_sja1000_set(0);
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    lpc2138_rd_set(0);
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    data = lpc2138_data_get();
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    data = lpc2138_data_get();
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    lpc2138_rd_set(1);
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    lpc2138_cs_sja1000_set(1);
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    lpc2138_data_set_mode(LPC2138_MODE_OUTPUT);
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    return data;
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}
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void sja1000_write(unsigned char addr8, unsigned char data)
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{
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    lpc2138_data_set_mode(LPC2138_MODE_OUTPUT);
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    lpc2138_data_set(addr8);
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    lpc2138_ale_set(1);
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    lpc2138_ale_set(0);
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    lpc2138_cs_sja1000_set(0);
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    lpc2138_wr_set(0);
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    lpc2138_data_set(data);
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    lpc2138_wr_set(1);
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    lpc2138_cs_sja1000_set(1);
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}
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/*
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	FLASH interface
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*/
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/************************************************************************/
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/*                                                                    	*/
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/* function:								*/
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/*  void ee_erase(unsigned int command_ee,unsigned int result_ee[])	*/
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/*                                                                     	*/
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/* type: void                                                          	*/
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/*                                                                     	*/
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/* parameters: 								*/
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/* 	command_ee   - Not used.  	               			*/
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/*  result_ee[0] - Returns a response to the last IAP command used.	*/
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/*                 0 - EEPROM successfully erased.			*/
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/*                 For all other response values, see microcontroller 	*/
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/*		   User Manual, IAP Commands and Status Codes Summary.	*/
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/*  result_ee[1] - Not used.                         			*/
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/*                                                                     	*/
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/* version: 1.1 (01/27/2006)                                           	*/
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/*                                                                     	*/
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/* constants defined in LPC2k_ee.h used in this function:              	*/
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/*  EE_SEC_L 	 - microcontroller's Flash sector where EEPROM begins	*/
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/*  EE_SEC_H 	 - microcontroller's Flash sector where EEPROM ends	*/
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/*  EE_CCLK		 - microcontroller's system clock (cclk)        */
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/*                                                                     	*/
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/* description:								*/
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/*  This function erases LPC2000 on-chip Flash sectors selected to act 	*/
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/*  as an EEPROM. All Flash sectors between EE_SEC_L abd EE_SEC_H	*/
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/*  (including these sectors) will be erased using the In Application	*/
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/*  Programming (IAP) routines (see User Manual for more details). 	*/
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/*  Also, this function disables all interrupts while erasing the       */
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/*  EEPROM. If this is not needed, three lines of the ee_erase          */
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/*  subroutine can simply be commented-out without affecting the        */
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/*  routine performance at all.                                         */
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/*                                                                     	*/
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/* revision history:                                                   	*/
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/* - Rev. 1.1 adds interrupt disable feature.				*/
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/*                                                                     	*/
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/************************************************************************/
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void iat_flash_erase(unsigned int command_ee,unsigned int result_ee[])
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{
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	unsigned int command_iap[5];
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	unsigned int result_iap[3];
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	unsigned long int enabled_interrupts;
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	enabled_interrupts = VICIntEnable;  //disable all interrupts
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	VICIntEnClr        = enabled_interrupts;
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	command_iap[0]=50;	// prepare sectors from EE_SEC_L to EE_SEC_H for erase
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	command_iap[1]=EE_SEC_L;
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	command_iap[2]=EE_SEC_H;
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	iap_entry=(IAP) IAP_LOCATION;
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	iap_entry(command_iap,result_iap);
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	command_iap[0]=52;	// erase sectors from EE_SEC_L to EE_SEC_H
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	command_iap[1]=EE_SEC_L;
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	command_iap[2]=EE_SEC_H;
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	command_iap[3]=EE_CCLK;
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	iap_entry=(IAP) IAP_LOCATION;
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	iap_entry(command_iap,result_iap);
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	command_iap[0]=53;	// blankcheck sectors from EE_SEC_L to EE_SEC_H
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	command_iap[1]=EE_SEC_L;
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	command_iap[2]=EE_SEC_H;
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	iap_entry=(IAP) IAP_LOCATION;
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	iap_entry(command_iap,result_iap);
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	VICIntEnable = enabled_interrupts;  //restore interrupt enable register
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	result_ee[0]=result_iap[0];
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	return;
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}
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/************************************************************************/
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/*                                                                    	*/
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/* function: 								*/
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/*  void ee_write(unsigned int command_ee,unsigned int result_ee[])	*/
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/*                                                                     	*/
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/* type: void                                                          	*/
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/*                                                                     	*/
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/* parameters: 								*/
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/* 	command_ee   - An address of a content of ee_data type that has	*/
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/*                 to be programmed into EEPROM.                       	*/
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/*  result_ee[0] - Returns a response to the last IAP command used.	*/
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/*                 0 - data successfully programmed in EEPROM.		*/
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/*               501 - no space in EEPROM to program data.             	*/
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/*                 For all other response values, see microcontroller 	*/
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/*		   User Manual, IAP Commands and Status Codes Summary.	*/
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/*  result_ee[1] - Not used.                           			*/
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/*                                                                     	*/
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/* version: 1.1 (01/27/2006)                                           	*/
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/*                                                                     	*/
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/* constants defined in LPC2k_ee.h used in this function:              	*/
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/*  EE_BUFFER_SIZE 	   - IAP buffer size; must be 256 or 512 	*/
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/*  NO_SPACE_IN_EEPROM - EEPROM is full and no data can be programmed	*/
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/*  EE_BUFFER_MASK	   - parameter used for interfacing with IAP	*/
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/*  EE_REC_SIZE   	   - ee_data structure size in bytes        	*/
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/*  EE_SEC_L 	 	   - micro's Flash sector where EEPROM begins	*/
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/*  EE_SEC_H 	 	   - micro's Flash sector where EEPROM ends	*/
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/*  EE_CCLK		 	   - micro's system clock (cclk)       	*/
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/*                                                                     	*/
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/* description:								*/
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/*  This function writes a single structure of ee_data type into the	*/
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/*  EEPROM using an In Application	Programming (IAP) routines (see */
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/*  User Manual for more details). command_ee contains an address of	*/
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/*  this structure. EEPROM is scanned for the last (if any) record 	*/
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/*  identifier (EE_REC_ID), and a new record is added next to it.      	*/
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/*  Also, this function disables all interrupts while erasing the       */
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/*  EEPROM. If this is not needed, three lines of the ee_write          */
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/*  subroutine can simply be commented-out without affecting the        */
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/*  routine performance at all.                                         */
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/*                                                                     	*/
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/* revision history:                                                   	*/
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/* - Rev. 1.1 fixes a bug related to verifying a content written into	*/
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/*   the EEPROM. 1.0 was reporting missmatch even when there were no	*/
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/*   problems at all.							*/
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/*   Rev. 1.1 adds interrupt disable feature.				*/
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/*                                                                     	*/
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/************************************************************************/
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void iat_flash_write_page(unsigned int addr)
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{
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	unsigned long int enabled_interrupts;
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	// unsigned char ee_buffer[16];
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	unsigned int command_iap[5], result_iap[3];
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	enabled_interrupts = VICIntEnable;  //disable all interrupts
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	VICIntEnClr        = enabled_interrupts;
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	iap_entry = (IAP) IAP_LOCATION;
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	// prepare sectors from EE_SEC_L to EE_SEC_H for erase
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	command_iap[0] = 50;			
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	command_iap[1] = EE_SEC_L;
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	command_iap[2] = EE_SEC_H;
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	iap_entry(command_iap, result_iap);
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	// copy RAM to flash/eeprom
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	command_iap[0] = 51;
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	command_iap[1] = (unsigned int) (addr & EE_START_MASK); // 256 kb boundary
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	command_iap[2] = (unsigned int) (data_page);            // should be on a word boundary
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	command_iap[3] = 256;
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	command_iap[4] = EE_CCLK;
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	iap_entry(command_iap, result_iap);
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#if 0 
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	// compare RAM and flash/eeprom
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	command_iap[0] = 56;
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	command_iap[1] = (unsigned int) data;
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	command_iap[2] = addr;
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	command_iap[3] = dlen;
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	iap_entry(command_iap, result_iap);
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#endif
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	VICIntEnable = enabled_interrupts;  //restore interrupt enable register
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}
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/************************************************************************/
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/*                                                                    	*/
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/* function: 								*/
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/*  void ee_read(unsigned int command_ee,unsigned int result_ee[])	*/
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/*                                                                     	*/
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/* type: void                                                          	*/
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/*                                                                     	*/
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/* parameters: 								*/
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/* 	command_ee   - Not used.					*/
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/*  result_ee[0] - Returns a response.					*/
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/*                 0 - data successfully found in EEPROM.		*/
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/*               500 - no data/records available in EEPROM.		*/
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/*  result_ee[1] - an address of the last record of ee_data type	*/
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/*				   in EEPROM.  	              		*/
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/*                                                                     	*/
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/* version: 1.1 (01/27/2006)                                           	*/
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/*                                                                     	*/
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/* constants defined in LPC2k_ee.h used in this function:              	*/
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/*  NO_RECORDS_AVAILABLE - EEPROM is empty/no records identifiable	*/
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/*			   with a record identifier (EE_REC_ID) found	*/
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/*  EE_ADR_L 	    - micro's Flash address from where EEPROM begins	*/
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/*  EE_REC_SIZE    - size (in bytes) of a ee_data structure        	*/
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/*                                                                 	*/
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/* description:								*/
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/*  This function scans an EEPROM content looking for the last record 	*/
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/*  that can be identified with a record identifier (EE_REC_ID). When 	*/
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/*  such data is found, its address is passed as result_ee[1].		*/
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/*                                                                     	*/
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/* revision history:                                                   	*/
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/* - Rev. 1.0 had problems with accessing the last record in a fully	*/
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/*   occupied EEPROM. Rev. 1.1 fixes this.				*/
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/*                                                                     	*/
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/************************************************************************/
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void iat_flash_read_page(unsigned int addr)
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{
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	memcpy(data_page, (unsigned int *)addr, sizeof(unsigned int)*64);
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}
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