oremeq@3: /* oremeq@3: canfestival@canopencanada.ca oremeq@3: oremeq@3: See COPYING file for copyrights details. oremeq@3: oremeq@3: This library is free software; you can redistribute it and/or oremeq@3: modify it under the terms of the GNU Lesser General Public oremeq@3: License as published by the Free Software Foundation; either oremeq@3: version 2.1 of the License, or (at your option) any later version. oremeq@3: oremeq@3: This library is distributed in the hope that it will be useful, oremeq@3: but WITHOUT ANY WARRANTY; without even the implied warranty of oremeq@3: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU oremeq@3: Lesser General Public License for more details. oremeq@3: oremeq@3: You should have received a copy of the GNU Lesser General Public oremeq@3: License along with this library; if not, write to the Free Software oremeq@3: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA oremeq@3: oremeq@3: flash.c oremeq@3: save to / retrieve from the non-volatile memory oremeq@3: to be tested oremeq@3: - can we write/read into an address without working with the whole page (256bytes) oremeq@3: */ oremeq@3: oremeq@3: oremeq@3: #include oremeq@3: #include oremeq@3: oremeq@3: #include "applicfg.h" oremeq@3: #include "data.h" oremeq@3: #include "objdictdef.h" oremeq@3: oremeq@3: #include "lpc2138_defs.h" /* LPC21xx definitions */ oremeq@3: oremeq@3: #define IAP_LOCATION 0x7ffffff1 oremeq@3: oremeq@3: oremeq@3: // define a page of data of NVRAM_BLOCK_SIZE bytes oremeq@3: // oremeq@3: short data_len; /* 0 to NVRAM_BLOCK_SIZE bytes */ oremeq@3: short data_num_pages; oremeq@3: unsigned int *data_page = NULL; oremeq@3: unsigned int data_addr; oremeq@3: oremeq@3: unsigned int *regs_page = NULL; oremeq@3: oremeq@3: // local definitons oremeq@3: void ee_erase(unsigned int ,unsigned int[]); //function erases EEPROM oremeq@3: void ee_write_page(unsigned int); //function adds a record in EEPROM oremeq@3: void ee_read_page(unsigned int); //function reads the latest valid record in EEPROM oremeq@3: oremeq@3: typedef void (*IAP)(unsigned int [],unsigned int[]); oremeq@3: IAP iap_entry; oremeq@3: oremeq@3: oremeq@18: int iat_init() oremeq@18: { oremeq@18: int n = NVRAM_BLOCK_SIZE / sizeof(unsigned int); oremeq@18: oremeq@18: /* some actions to initialise the flash */ oremeq@18: data_len = 0; oremeq@18: data_num_pages = 0; oremeq@18: oremeq@18: data_page = (unsigned int *)malloc(sizeof(unsigned int) * n); oremeq@18: memset(data_page, 0, sizeof(unsigned int)*n); oremeq@18: oremeq@18: if (data_page == NULL) oremeq@18: return -1; oremeq@18: oremeq@18: regs_page = (unsigned int *)malloc(sizeof(unsigned int) * n); oremeq@18: memset(regs_page, 0, sizeof(unsigned int)*n); oremeq@18: if (regs_page == NULL) oremeq@18: return -2; oremeq@18: oremeq@18: iat_flash_read_regs(); oremeq@18: oremeq@18: /* start the data at the location specified in the registers */ oremeq@18: if (0) /* for now it is 0, but put here a test to know whether oremeq@18: or not the NVRAM has been written before */ oremeq@18: data_addr = regs_page[1]; oremeq@18: else oremeq@18: data_addr = NVRAM_BLOCK_SIZE; /* let start at block 1 */ oremeq@18: oremeq@18: return 0; oremeq@18: } oremeq@18: oremeq@18: oremeq@18: void iat_end() oremeq@18: { oremeq@18: /* write the last page before closing */ oremeq@18: iat_flash_write_page(data_addr); oremeq@18: oremeq@18: /* some actions to end accessing the flash */ oremeq@18: free(data_page); oremeq@18: oremeq@18: regs_page[4] = data_num_pages; oremeq@18: /* write the registers to the NVRAM before closing */ oremeq@18: iat_flash_write_regs(); oremeq@18: free(regs_page); oremeq@18: } oremeq@18: oremeq@18: oremeq@3: oremeq@3: /************************************************************************/ oremeq@3: /* */ oremeq@3: /* function: */ oremeq@3: /* void ee_erase(unsigned int command_ee,unsigned int result_ee[]) */ oremeq@3: /* */ oremeq@3: /* type: void */ oremeq@3: /* */ oremeq@3: /* parameters: */ oremeq@3: /* command_ee - Not used. */ oremeq@3: /* result_ee[0] - Returns a response to the last IAP command used. */ oremeq@3: /* 0 - EEPROM successfully erased. */ oremeq@3: /* For all other response values, see microcontroller */ oremeq@3: /* User Manual, IAP Commands and Status Codes Summary. */ oremeq@3: /* result_ee[1] - Not used. */ oremeq@3: /* */ oremeq@3: /* version: 1.1 (01/27/2006) */ oremeq@3: /* */ oremeq@3: /* constants defined in LPC2k_ee.h used in this function: */ oremeq@3: /* EE_SEC_L - microcontroller's Flash sector where EEPROM begins */ oremeq@3: /* EE_SEC_H - microcontroller's Flash sector where EEPROM ends */ oremeq@3: /* EE_CCLK - microcontroller's system clock (cclk) */ oremeq@3: /* */ oremeq@3: /* description: */ oremeq@3: /* This function erases LPC2000 on-chip Flash sectors selected to act */ oremeq@3: /* as an EEPROM. All Flash sectors between EE_SEC_L abd EE_SEC_H */ oremeq@3: /* (including these sectors) will be erased using the In Application */ oremeq@3: /* Programming (IAP) routines (see User Manual for more details). */ oremeq@3: /* Also, this function disables all interrupts while erasing the */ oremeq@3: /* EEPROM. If this is not needed, three lines of the ee_erase */ oremeq@3: /* subroutine can simply be commented-out without affecting the */ oremeq@3: /* routine performance at all. */ oremeq@3: /* */ oremeq@3: /* revision history: */ oremeq@3: /* - Rev. 1.1 adds interrupt disable feature. */ oremeq@3: /* */ oremeq@3: /************************************************************************/ oremeq@3: void ee_erase(unsigned int command_ee,unsigned int result_ee[]) oremeq@3: { oremeq@3: unsigned int command_iap[5]; oremeq@3: unsigned int result_iap[3]; oremeq@3: unsigned long int enabled_interrupts; oremeq@3: oremeq@3: enabled_interrupts = VICIntEnable; //disable all interrupts oremeq@3: VICIntEnClr = enabled_interrupts; oremeq@3: oremeq@3: command_iap[0]=50; // prepare sectors from EE_SEC_L to EE_SEC_H for erase oremeq@3: command_iap[1]=EE_SEC_L; oremeq@3: command_iap[2]=EE_SEC_H; oremeq@3: iap_entry=(IAP) IAP_LOCATION; oremeq@3: iap_entry(command_iap,result_iap); oremeq@3: oremeq@3: command_iap[0]=52; // erase sectors from EE_SEC_L to EE_SEC_H oremeq@3: command_iap[1]=EE_SEC_L; oremeq@3: command_iap[2]=EE_SEC_H; oremeq@3: command_iap[3]=EE_CCLK; oremeq@3: iap_entry=(IAP) IAP_LOCATION; oremeq@3: iap_entry(command_iap,result_iap); oremeq@3: oremeq@3: command_iap[0]=53; // blankcheck sectors from EE_SEC_L to EE_SEC_H oremeq@3: command_iap[1]=EE_SEC_L; oremeq@3: command_iap[2]=EE_SEC_H; oremeq@3: iap_entry=(IAP) IAP_LOCATION; oremeq@3: iap_entry(command_iap,result_iap); oremeq@3: oremeq@3: VICIntEnable = enabled_interrupts; //restore interrupt enable register oremeq@3: oremeq@3: result_ee[0]=result_iap[0]; oremeq@3: return; oremeq@3: } oremeq@3: oremeq@3: /************************************************************************/ oremeq@3: /* */ oremeq@3: /* function: */ oremeq@3: /* void ee_write(unsigned int command_ee,unsigned int result_ee[]) */ oremeq@3: /* */ oremeq@3: /* type: void */ oremeq@3: /* */ oremeq@3: /* parameters: */ oremeq@3: /* command_ee - An address of a content of ee_data type that has */ oremeq@3: /* to be programmed into EEPROM. */ oremeq@3: /* result_ee[0] - Returns a response to the last IAP command used. */ oremeq@3: /* 0 - data successfully programmed in EEPROM. */ oremeq@3: /* 501 - no space in EEPROM to program data. */ oremeq@3: /* For all other response values, see microcontroller */ oremeq@3: /* User Manual, IAP Commands and Status Codes Summary. */ oremeq@3: /* result_ee[1] - Not used. */ oremeq@3: /* */ oremeq@3: /* version: 1.1 (01/27/2006) */ oremeq@3: /* */ oremeq@3: /* constants defined in LPC2k_ee.h used in this function: */ oremeq@3: /* EE_BUFFER_SIZE - IAP buffer size; must be 256 or 512 */ oremeq@3: /* NO_SPACE_IN_EEPROM - EEPROM is full and no data can be programmed */ oremeq@3: /* EE_BUFFER_MASK - parameter used for interfacing with IAP */ oremeq@3: /* EE_REC_SIZE - ee_data structure size in bytes */ oremeq@3: /* EE_SEC_L - micro's Flash sector where EEPROM begins */ oremeq@3: /* EE_SEC_H - micro's Flash sector where EEPROM ends */ oremeq@3: /* EE_CCLK - micro's system clock (cclk) */ oremeq@3: /* */ oremeq@3: /* description: */ oremeq@3: /* This function writes a single structure of ee_data type into the */ oremeq@3: /* EEPROM using an In Application Programming (IAP) routines (see */ oremeq@3: /* User Manual for more details). command_ee contains an address of */ oremeq@3: /* this structure. EEPROM is scanned for the last (if any) record */ oremeq@3: /* identifier (EE_REC_ID), and a new record is added next to it. */ oremeq@3: /* Also, this function disables all interrupts while erasing the */ oremeq@3: /* EEPROM. If this is not needed, three lines of the ee_write */ oremeq@3: /* subroutine can simply be commented-out without affecting the */ oremeq@3: /* routine performance at all. */ oremeq@3: /* */ oremeq@3: /* revision history: */ oremeq@3: /* - Rev. 1.1 fixes a bug related to verifying a content written into */ oremeq@3: /* the EEPROM. 1.0 was reporting missmatch even when there were no */ oremeq@3: /* problems at all. */ oremeq@3: /* Rev. 1.1 adds interrupt disable feature. */ oremeq@3: /* */ oremeq@3: /************************************************************************/ oremeq@3: oremeq@3: void ee_write_page(unsigned int addr) oremeq@3: { oremeq@3: unsigned long int enabled_interrupts; oremeq@3: // unsigned char ee_buffer[16]; oremeq@3: unsigned int command_iap[5], result_iap[3]; oremeq@3: oremeq@3: enabled_interrupts = VICIntEnable; //disable all interrupts oremeq@3: VICIntEnClr = enabled_interrupts; oremeq@3: oremeq@3: iap_entry = (IAP) IAP_LOCATION; oremeq@3: oremeq@3: // prepare sectors from EE_SEC_L to EE_SEC_H for erase oremeq@3: command_iap[0] = 50; oremeq@3: command_iap[1] = EE_SEC_L; oremeq@3: command_iap[2] = EE_SEC_H; oremeq@3: iap_entry(command_iap, result_iap); oremeq@3: oremeq@3: // copy RAM to flash/eeprom oremeq@3: command_iap[0] = 51; oremeq@3: command_iap[1] = (unsigned int) (addr & EE_START_MASK); // 256 kb boundary oremeq@3: command_iap[2] = (unsigned int) (data_page); // should be on a word boundary oremeq@3: command_iap[3] = 256; oremeq@3: command_iap[4] = EE_CCLK; oremeq@3: iap_entry(command_iap, result_iap); oremeq@3: oremeq@3: #if 0 oremeq@3: // compare RAM and flash/eeprom oremeq@3: command_iap[0] = 56; oremeq@3: command_iap[1] = (unsigned int) data; oremeq@3: command_iap[2] = addr; oremeq@3: command_iap[3] = dlen; oremeq@3: iap_entry(command_iap, result_iap); oremeq@3: #endif oremeq@3: oremeq@3: VICIntEnable = enabled_interrupts; //restore interrupt enable register oremeq@3: } oremeq@3: oremeq@3: oremeq@3: /************************************************************************/ oremeq@3: /* */ oremeq@3: /* function: */ oremeq@3: /* void ee_read(unsigned int command_ee,unsigned int result_ee[]) */ oremeq@3: /* */ oremeq@3: /* type: void */ oremeq@3: /* */ oremeq@3: /* parameters: */ oremeq@3: /* command_ee - Not used. */ oremeq@3: /* result_ee[0] - Returns a response. */ oremeq@3: /* 0 - data successfully found in EEPROM. */ oremeq@3: /* 500 - no data/records available in EEPROM. */ oremeq@3: /* result_ee[1] - an address of the last record of ee_data type */ oremeq@3: /* in EEPROM. */ oremeq@3: /* */ oremeq@3: /* version: 1.1 (01/27/2006) */ oremeq@3: /* */ oremeq@3: /* constants defined in LPC2k_ee.h used in this function: */ oremeq@3: /* NO_RECORDS_AVAILABLE - EEPROM is empty/no records identifiable */ oremeq@3: /* with a record identifier (EE_REC_ID) found */ oremeq@3: /* EE_ADR_L - micro's Flash address from where EEPROM begins */ oremeq@3: /* EE_REC_SIZE - size (in bytes) of a ee_data structure */ oremeq@3: /* */ oremeq@3: /* description: */ oremeq@3: /* This function scans an EEPROM content looking for the last record */ oremeq@3: /* that can be identified with a record identifier (EE_REC_ID). When */ oremeq@3: /* such data is found, its address is passed as result_ee[1]. */ oremeq@3: /* */ oremeq@3: /* revision history: */ oremeq@3: /* - Rev. 1.0 had problems with accessing the last record in a fully */ oremeq@3: /* occupied EEPROM. Rev. 1.1 fixes this. */ oremeq@3: /* */ oremeq@3: /************************************************************************/ oremeq@3: void ee_read_page(unsigned int addr) oremeq@3: { oremeq@3: memcpy(data_page, (unsigned int *)addr, sizeof(unsigned int)*64); oremeq@3: } oremeq@3: oremeq@3: oremeq@3: ////////////////////////////////////////////////////////////////////////////////////////// oremeq@3: ////////////////////////////////////////////////////////////////////////////////////////// oremeq@3: oremeq@3: oremeq@3: /* oremeq@3: CAN FESTIVAL interface functions oremeq@3: */ oremeq@3: oremeq@3: oremeq@3: int _get_data_len(int type) oremeq@3: { oremeq@3: int len = 0; /* number of bytes */ oremeq@3: switch(type) oremeq@3: { oremeq@3: case boolean: oremeq@3: len = 1; oremeq@3: break; oremeq@3: oremeq@3: case int8: oremeq@3: case uint8: oremeq@3: len = 1; oremeq@3: break; oremeq@3: case int16: oremeq@3: case uint16: oremeq@3: len = 2; oremeq@3: break; oremeq@3: case int24: oremeq@3: case uint24: oremeq@3: len = 3; oremeq@3: break; oremeq@3: case int32: oremeq@3: case uint32: oremeq@3: case real32: oremeq@3: len = 4; oremeq@3: break; oremeq@3: case int40: oremeq@3: case uint40: oremeq@3: len = 5; oremeq@3: break; oremeq@3: case int48: oremeq@3: case uint48: oremeq@3: len = 6; oremeq@3: break; oremeq@3: case int56: oremeq@3: case uint56: oremeq@3: len = 7; oremeq@3: break; oremeq@3: case int64: oremeq@3: case uint64: oremeq@3: case real64: oremeq@3: len = 8; oremeq@3: break; oremeq@3: #if 0 oremeq@3: /* TO DO */ oremeq@3: case visible_string: oremeq@3: case octet_string: oremeq@3: case unicode_string: oremeq@3: case time_of_day: oremeq@3: case time_difference: oremeq@3: #endif oremeq@3: } oremeq@3: oremeq@3: return len; oremeq@3: } oremeq@3: oremeq@3: oremeq@3: