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/*
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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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flash.c
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save to / retrieve from the non-volatile memory
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to be tested
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- can we write/read into an address without working with the whole page (256bytes)
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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 "data.h"
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#include "objdictdef.h"
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#include "lpc2138_defs.h" /* LPC21xx definitions */
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#define IAP_LOCATION 0x7ffffff1
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// define a page of data of NVRAM_BLOCK_SIZE bytes
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//
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short data_len; /* 0 to NVRAM_BLOCK_SIZE bytes */
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short data_num_pages;
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unsigned int *data_page = NULL;
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unsigned int data_addr;
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unsigned int *regs_page = NULL;
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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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/* */
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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 ee_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 ee_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 ee_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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//////////////////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////////////////
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/*
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CAN FESTIVAL interface functions
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*/
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int _get_data_len(int type)
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{
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int len = 0; /* number of bytes */
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switch(type)
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{
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case boolean:
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len = 1;
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break;
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case int8:
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case uint8:
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len = 1;
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break;
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case int16:
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case uint16:
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len = 2;
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break;
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case int24:
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case uint24:
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len = 3;
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break;
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case int32:
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case uint32:
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case real32:
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len = 4;
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break;
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case int40:
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case uint40:
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len = 5;
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break;
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case int48:
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case uint48:
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len = 6;
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break;
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case int56:
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case uint56:
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len = 7;
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break;
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case int64:
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case uint64:
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case real64:
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len = 8;
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break;
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#if 0
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/* TO DO */
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case visible_string:
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case octet_string:
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case unicode_string:
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case time_of_day:
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case time_difference:
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#endif
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}
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return len;
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}
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