137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
/*******************************************************************************
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* @note Copyright (C) 2017 Shanghai Panchip Microelectronics Co., Ltd.
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* All rights reserved.
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*
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* @file drv_flash.c
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* @brief FLASH读写
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*
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* @history - V1.0, 2017-03-10, xiaoguolin, first implementation.
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*******************************************************************************/
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#include "lib_driver_flash_pan159.h"
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/*******************************************************************************
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* @brief FLASH擦除扇区(512字节)
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* @param[in] addr - 起始地址(512字节对齐)
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* sectors - 要擦除的连续扇区数目
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* @param[out] 无
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* @return 无
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* @history - V1.0, 2017-03-13, xiaoguolin, first implementation.
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*******************************************************************************/
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void flash_pan159_erase(uint32_t addr, uint16_t sectors)
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{
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SYS_UnlockReg();
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FMC_Open();
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FMC_ENABLE_SP_UPDATE();
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while(sectors != 0)
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{
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FMC_Erase(addr);
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addr += 128;
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sectors--;
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}
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FMC_DISABLE_SP_UPDATE();
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FMC_Close();
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SYS_LockReg();
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}
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/*******************************************************************************
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* @brief FLASH数据写入
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* @param[in] addr - 写入起始地址，要求4字节对齐
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* p_addr - 数据指针
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* len - 数据长度(字节为单位)
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* @param[out] 无
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* @return 无
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* @history - V1.0, 2017-03-13, xiaoguolin, first implementation.
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*******************************************************************************/
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void flash_pan159_write(uint32_t addr, void* p_data, uint16_t len)
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{
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#define PTR32 ((uint32_t*)p_data)
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#define PTR8 ((uint8_t*)p_data)
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uint16_t i;
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union{
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uint32_t u32;
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struct{
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uint8_t x0;
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uint8_t x1;
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uint8_t x2;
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uint8_t x3;
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}u8;
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}tmp;
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tmp.u32 = 0xFFFFFFFF;
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SYS_UnlockReg();
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FMC_Open();
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FMC_ENABLE_SP_UPDATE();
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for(i = 0; i < (len>>2); i++)
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{
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FMC_Write(addr,PTR32[i]);
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addr += 4;
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}
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i <<= 2;
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if(i < len)
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{
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tmp.u8.x0 = PTR8[i++];
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if(i < len)
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{
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tmp.u8.x1 = PTR8[i++];
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if(i < len)
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{
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tmp.u8.x2 = PTR8[i];
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}
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}
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FMC_Write(addr,tmp.u32);
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}
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FMC_DISABLE_SP_UPDATE();
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FMC_Close();
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SYS_LockReg();
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#undef PTR8
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#undef PTR32
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}
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/*******************************************************************************
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* @brief FLASH数据读取
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* @param[in] addr - 读取起始地址，要求4字节对齐
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* len - 数据长度(字节为单位)
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* @param[out] p_data - 数据缓冲区指针，帯回数据
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* @return 无
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* @history - V1.0, 2017-03-13, xiaoguolin, first implementation.
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*******************************************************************************/
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void flash_pan159_read(uint32_t addr, void* p_data, uint16_t len)
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{
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#define PTR32 ((uint32_t*)p_data)
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#define PTR8 ((uint8_t*)p_data)
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#define TMP (*((uint32_t*)tmp))
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uint16_t i;
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uint8_t tmp[4];
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SYS_UnlockReg();
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FMC_Open();
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FMC_ENABLE_SP_UPDATE();
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for(i = 0; i < (len>>2); i++)
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{
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PTR32[i] = FMC_Read(addr);
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addr += 4;
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}
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i <<= 2;
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if(i < len)
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{
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TMP = FMC_Read(addr);
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PTR8[i++] = tmp[0];
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if(i < len)
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{
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PTR8[i++] = tmp[1];
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if(i < len)
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{
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PTR8[i] = tmp[2];
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}
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}
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}
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FMC_DISABLE_SP_UPDATE();
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FMC_Close();
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SYS_LockReg();
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#undef TMP
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#undef PTR8
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#undef PTR32
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}
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