268 lines
10 KiB
C
268 lines
10 KiB
C
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/**********************************************************************
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* $Id$ lpc_eeprom.c 2011-06-02
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*//**
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* @file lpc_eeprom.c
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* @brief Contains all functions support for EEPROM firmware library on
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* LPC
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* @version 1.0
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* @date 02. June. 2011
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* @author NXP MCU SW Application Team
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*
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* Copyright(C) 2011, NXP Semiconductor
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* All rights reserved.
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*
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***********************************************************************
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* products. This software is supplied "AS IS" without any warranties.
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* NXP Semiconductors assumes no responsibility or liability for the
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* use of the software, conveys no license or title under any patent,
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* copyright, or mask work right to the product. NXP Semiconductors
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* reserves the right to make changes in the software without
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* notification. NXP Semiconductors also make no representation or
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* warranty that such application will be suitable for the specified
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* use without further testing or modification.
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors'
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* relevant copyright in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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**********************************************************************/
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/* Peripheral group ----------------------------------------------------------- */
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/** @addtogroup EEPROM
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* @{
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*/
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#ifdef __BUILD_WITH_EXAMPLE__
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#include "lpc_libcfg.h"
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#else
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#include "lpc_libcfg_default.h"
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#endif /* __BUILD_WITH_EXAMPLE__ */
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#ifdef _EEPROM
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/* Includes ------------------------------------------------------------------- */
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#include "lpc_eeprom.h"
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#include "lpc_clkpwr.h"
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/* Public Functions ----------------------------------------------------------- */
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/*********************************************************************//**
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* @brief Initial EEPROM
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* @param[in] None
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* @return None
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**********************************************************************/
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void EEPROM_Init(void)
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{
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uint32_t val, cclk;
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LPC_EEPROM->PWRDWN = 0x0;
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/* EEPROM is automate turn on after reset */
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/* Setting clock:
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* EEPROM required a 375kHz. This clock is generated by dividing the
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* system bus clock.
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*/
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cclk = CLKPWR_GetCLK(CLKPWR_CLKTYPE_CPU);
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val = (cclk/375000)-1;
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LPC_EEPROM->CLKDIV = val;
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/* Setting wait state */
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val = ((((cclk / 1000000) * 15) / 1000) + 1);
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val |= (((((cclk / 1000000) * 55) / 1000) + 1) << 8);
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val |= (((((cclk / 1000000) * 35) / 1000) + 1) << 16);
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LPC_EEPROM->WSTATE = val;
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}
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/*********************************************************************//**
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* @brief Write data to EEPROM at specific address
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* @param[in] page_offset offset of data in page register(0 - 63)
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* page_address page address (0-62)
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* mode Write mode, should be:
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* - MODE_8_BIT : write 8 bit mode
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* - MODE_16_BIT : write 16 bit mode
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* - MODE_32_BIT : write 32 bit mode
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* data buffer that contain data that will be written to buffer
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* count number written data
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* @return None
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* @note This function actually write data into EEPROM memory and automatically
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* write into next page if current page is overflowed
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**********************************************************************/
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void EEPROM_Write(uint16_t page_offset, uint16_t page_address, void* data, EEPROM_Mode_Type mode, uint32_t count)
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{
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uint32_t i;
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uint8_t *tmp8 = (uint8_t *)data;
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uint16_t *tmp16 = (uint16_t *)data;
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uint32_t *tmp32 = (uint32_t *)data;
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LPC_EEPROM->INT_CLR_STATUS = ((1 << EEPROM_ENDOF_RW)|(1 << EEPROM_ENDOF_PROG));
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//check page_offset
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if(mode == MODE_16_BIT){
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if((page_offset & 0x01)!=0) while(1);
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}
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else if(mode == MODE_32_BIT){
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if((page_offset & 0x03)!=0) while(1);
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}
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LPC_EEPROM->ADDR = EEPROM_PAGE_OFFSET(page_offset);
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for(i=0;i<count;i++)
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{
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//update data to page register
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if(mode == MODE_8_BIT){
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LPC_EEPROM->CMD = EEPROM_CMD_8_BIT_WRITE;
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LPC_EEPROM -> WDATA = *tmp8;
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tmp8++;
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page_offset +=1;
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}
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else if(mode == MODE_16_BIT){
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LPC_EEPROM->CMD = EEPROM_CMD_16_BIT_WRITE;
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LPC_EEPROM -> WDATA = *tmp16;
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tmp16++;
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page_offset +=2;
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}
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else{
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LPC_EEPROM->CMD = EEPROM_CMD_32_BIT_WRITE;
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LPC_EEPROM -> WDATA = *tmp32;
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tmp32++;
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page_offset +=4;
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}
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while(!((LPC_EEPROM->INT_STATUS >> EEPROM_ENDOF_RW)&0x01));
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LPC_EEPROM->INT_CLR_STATUS = (1 << EEPROM_ENDOF_RW);
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if((page_offset >= EEPROM_PAGE_SIZE)|(i==count-1)){
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//update to EEPROM memory
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LPC_EEPROM->INT_CLR_STATUS = (0x1 << EEPROM_ENDOF_PROG);
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LPC_EEPROM->ADDR = EEPROM_PAGE_ADRESS(page_address);
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LPC_EEPROM->CMD = EEPROM_CMD_ERASE_PRG_PAGE;
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while(!((LPC_EEPROM->INT_STATUS >> EEPROM_ENDOF_PROG)&0x01));
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LPC_EEPROM->INT_CLR_STATUS = (1 << EEPROM_ENDOF_PROG);
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}
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if(page_offset >= EEPROM_PAGE_SIZE)
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{
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page_offset = 0;
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page_address +=1;
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LPC_EEPROM->ADDR =0;
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if(page_address > EEPROM_PAGE_NUM - 1) page_address = 0;
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}
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}
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}
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/*********************************************************************//**
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* @brief Read data to EEPROM at specific address
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* @param[in]
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* data buffer that contain data that will be written to buffer
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* mode Read mode, should be:
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* - MODE_8_BIT : read 8 bit mode
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* - MODE_16_BIT : read 16 bit mode
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* - MODE_32_BIT : read 32 bit mode
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* count number read data (bytes)
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* @return data buffer that contain data that will be read to buffer
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**********************************************************************/
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void EEPROM_Read(uint16_t page_offset, uint16_t page_address, void* data, EEPROM_Mode_Type mode, uint32_t count)
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{
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uint32_t i;
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uint8_t *tmp8 = (uint8_t *)data;
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uint16_t *tmp16 = (uint16_t *)data;
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uint32_t *tmp32 = (uint32_t *)data;
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LPC_EEPROM->INT_CLR_STATUS = ((1 << EEPROM_ENDOF_RW)|(1 << EEPROM_ENDOF_PROG));
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LPC_EEPROM->ADDR = EEPROM_PAGE_ADRESS(page_address)|EEPROM_PAGE_OFFSET(page_offset);
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if(mode == MODE_8_BIT)
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LPC_EEPROM->CMD = EEPROM_CMD_8_BIT_READ|EEPROM_CMD_RDPREFETCH;
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else if(mode == MODE_16_BIT){
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LPC_EEPROM->CMD = EEPROM_CMD_16_BIT_READ|EEPROM_CMD_RDPREFETCH;
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//check page_offset
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if((page_offset &0x01)!=0)
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return;
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}
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else{
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LPC_EEPROM->CMD = EEPROM_CMD_32_BIT_READ|EEPROM_CMD_RDPREFETCH;
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//page_offset must be a multiple of 0x04
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if((page_offset & 0x03)!=0)
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return;
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}
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//read and store data in buffer
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for(i=0;i<count;i++){
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if(mode == MODE_8_BIT){
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*tmp8 = (uint8_t)(LPC_EEPROM -> RDATA);
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tmp8++;
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page_offset +=1;
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}
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else if (mode == MODE_16_BIT)
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{
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*tmp16 = (uint16_t)(LPC_EEPROM -> RDATA);
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tmp16++;
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page_offset +=2;
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}
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else{
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*tmp32 = (uint32_t)(LPC_EEPROM ->RDATA);
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tmp32++;
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page_offset +=4;
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}
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while(!((LPC_EEPROM->INT_STATUS >> EEPROM_ENDOF_RW)&0x01));
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LPC_EEPROM->INT_CLR_STATUS = (1 << EEPROM_ENDOF_RW);
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if((page_offset >= EEPROM_PAGE_SIZE) && (i < count - 1)) {
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page_offset = 0;
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page_address++;
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LPC_EEPROM->ADDR = EEPROM_PAGE_ADRESS(page_address)|EEPROM_PAGE_OFFSET(page_offset);
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if(mode == MODE_8_BIT)
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LPC_EEPROM->CMD = EEPROM_CMD_8_BIT_READ|EEPROM_CMD_RDPREFETCH;
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else if(mode == MODE_16_BIT)
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LPC_EEPROM->CMD = EEPROM_CMD_16_BIT_READ|EEPROM_CMD_RDPREFETCH;
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else
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LPC_EEPROM->CMD = EEPROM_CMD_32_BIT_READ|EEPROM_CMD_RDPREFETCH;
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}
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}
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}
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/*********************************************************************//**
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* @brief Erase a page at the specific address
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* @param[in] address EEPROM page address (0-62)
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* @return data buffer that contain data that will be read to buffer
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**********************************************************************/
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void EEPROM_Erase(uint16_t page_address)
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{
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uint32_t i;
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uint32_t count = EEPROM_PAGE_SIZE/4;
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LPC_EEPROM->INT_CLR_STATUS = ((1 << EEPROM_ENDOF_RW)|(1 << EEPROM_ENDOF_PROG));
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//clear page register
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LPC_EEPROM->ADDR = EEPROM_PAGE_OFFSET(0);
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LPC_EEPROM->CMD = EEPROM_CMD_32_BIT_WRITE;
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for(i=0;i<count;i++)
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{
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LPC_EEPROM->WDATA = 0;
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while(!((LPC_EEPROM->INT_STATUS >> EEPROM_ENDOF_RW)&0x01));
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LPC_EEPROM->INT_CLR_STATUS = (1 << EEPROM_ENDOF_RW);
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}
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LPC_EEPROM->INT_CLR_STATUS = (0x1 << EEPROM_ENDOF_PROG);
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LPC_EEPROM->ADDR = EEPROM_PAGE_ADRESS(page_address);
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LPC_EEPROM->CMD = EEPROM_CMD_ERASE_PRG_PAGE;
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while(!((LPC_EEPROM->INT_STATUS >> EEPROM_ENDOF_PROG)&0x01));
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LPC_EEPROM->INT_CLR_STATUS = (1 << EEPROM_ENDOF_PROG);
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}
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/*********************************************************************//**
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* @brief Enable/Disable EEPROM power down mdoe
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* @param[in] NewState PowerDown mode state, should be:
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* - ENABLE: Enable power down mode
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* - DISABLE: Disable power down mode
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* @return None
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**********************************************************************/
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void EEPROM_PowerDown(FunctionalState NewState)
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{
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if(NewState == ENABLE)
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LPC_EEPROM->PWRDWN = 0x1;
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else
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LPC_EEPROM->PWRDWN = 0x0;
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}
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#endif /*_EEPROM*/
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/**
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* @}
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*/
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/* --------------------------------- End Of File ------------------------------ */
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