IAR EWARM下44b0x的FlashLoader
Flash Loader 是用IAR Embedded Workbench 开发的本地应用程序。其任务是通过文件I/O 从主机读取应用程序的二进制映象，将映象拆包，并写进Flash 存储器。Flash Loader 可以分成两个部分。一是所有Flash Loader 所共用的框架部分，其源代码由IAR Systems提供并包含在IAR Embedded Workbench 中；二是驱动部份，它是一小段用于实际烧写Flash 存储器的小程序。在IAR Embedded Workbench 中已经包含了一组用于各种内含FLASH的芯片的Flash Loader 驱动程序。而对于S3C44B0X，就得自己写Flash Loader 驱动程序了。本文主要针对44b0x + SST39VF160 (1M*16Bit FLASH) 目标板，在IAR-EWARM下的FLASHLOADER程序提供实例。
/*
;bank0 FLASH: SST39VF160 (1Mb*16)
;bank1
;bank2 16bit IDE
;bank3 rtl8019
;bank4
;bank5 ext
;bank6 16bit SDRAM
;bank7 16bit SDRAM
*/
#include <stdio.h>
#include <stdlib.h>
#include <ios3c44b0x.h>
#include "FlashS3C44B0x.h"
//#include "Interface.h" // The flash loader framework API declarations.
//#include "C:Program FilesIAR SystemsEmbedded Workbench 4.0 EvaluationARMsrcflashloaderframeworkInterface.c"
#define int8 signed char
#define int16 signed short
#define int32 signed long
#define int64 signed double
#define uint8 unsigned char
#define uint16 unsigned short
#define uint32 unsigned long
#define uint64 unsigned double
#define EmiWrite(addr, dat) *((uint16 *)(addr))=(uint16)dat
#define EmiRead(addr) *((uint32 *)(addr))
void cmd_toggle_bit()
{
uint8 dat1, dat2;
dat1 = EmiRead(0x1000<<1);
dat2 = EmiRead(0x1000<<1);
while((dat1^dat2) & 0x40) {
dat1 = dat2;
dat2 = EmiRead(0x1000<<1);
}
}
void cmd_exit()
{
EmiWrite(0x5555<<1, 0xAA);
EmiWrite(0x2AAA<<1, 0x55);
EmiWrite(0x5555<<1, 0xF0);
}
uint32 cmd_getid()
{
EmiWrite(0x5555<<1, 0xAA);
EmiWrite(0x2AAA<<1, 0x55);
EmiWrite(0x5555<<1, 0x90);
return EmiRead(0x0000<<1);
};
//--- 2K WORD，4K BYTE, per sector.
//-- sst39VF160 has 512 sectors
void cmd_sector_erase(uint32 sector)
{
EmiWrite(0x5555<<1, 0xAA);
EmiWrite(0x2AAA<<1, 0x55);
EmiWrite(0x5555<<1, 0x80);
EmiWrite(0x5555<<1, 0xAA);
EmiWrite(0x2AAA<<1, 0x55);
EmiWrite(sector<<12, 0x30);
};
//--- 32K WORD，64K BYTE, per block.
//-- sst39VF160 has 32 blocks
void cmd_block_erase(uint32 block)
{
EmiWrite(0x5555<<1, 0xAA);
EmiWrite(0x2AAA<<1, 0x55);
EmiWrite(0x5555<<1, 0x80);
EmiWrite(0x5555<<1, 0xAA);
EmiWrite(0x2AAA<<1, 0x55);
EmiWrite(block<<16, 0x50);
};
void cmd_chip_erase()
{
EmiWrite(0x5555<<1, 0xAA);
EmiWrite(0x2AAA<<1, 0x55);
EmiWrite(0x5555<<1, 0x80);
EmiWrite(0x5555<<1, 0xAA);
EmiWrite(0x2AAA<<1, 0x55);
EmiWrite(0x5555<<1, 0x10);
};
void cmd_word_program(uint32 ads, uint16 dat)
{
EmiWrite(0x5555<<1, 0xAA);
EmiWrite(0x2AAA<<1, 0x55);
EmiWrite(0x5555<<1, 0xA0);
EmiWrite(ads, dat);
};
// 512 个扇区状态,标识是否已经擦除过，默认没有
uint16 secBitMap[512] = {0};
__root void FlashWriteByte(uint32 addr, int byte)
{
static uint16 cnt = 0;
uint16 dat = byte;
uint16 sector;
cnt++;
if(addr > 0xfffff) { // 超过FLASH的1MB范围
*((char *)addr) = byte;
}else {
if(byte == -1) return;
sector = addr>>12; // 所在扇区
if(secBitMap[sector]==0) {
cmd_sector_erase(sector);
cmd_toggle_bit();
secBitMap[sector]=0xffff;
}
if(addr & 01) {
dat <<=8;
dat |= 0x00ff;
}else {
dat |= 0xff00;
}
addr>>=1;
cmd_word_program(addr<<1, dat);
cmd_toggle_bit();
}
return;
char msg[80];
sprintf(msg, "第 %d 次:FlashWriteByte(0x%X, 0x%X)
", cnt, addr, byte);
FlMessageLog (msg);
}
void FlashDriverInitialize(int argc, char const* argv[])
{
const char* str;
// Register the flash write function.
FlRegisterWriteFunction(FlashWriteByte);
/*
// See if user has passed a clock speed option.
// If not, the default CCLK value is used.
str = FlFindOption("--clock", 1, argc, argv);
if (str){
clock = strtoul(str, 0, 0);
}
*/
}
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