linux下對dataflash裝置操作(擦除、寫入檔案)的應用程式,注意,所有的操作必須要使用mtdx的字元裝置。
mtdchar的字元裝置驅動程式設計參考!
來自:#include
#include
#include
#include
#include
#include
#include
#include
#include
int non_region_erase(int fd, int start, int count, int unlock)
}if (ioctl(fd,memerase,&erase) != 0)
erase.start += meminfo.erasesize;
}printf(" done/n");
}return 0;
}int main(int argc, char *argv)
cmd=argv[1];
if (argc > 3)
// open and size the device
if ((fd = open(argv[2],o_rdwr)) < 0)
else
if (ioctl(fd,memgetregioncount,®count) == 0)
/*erase the device*/
if (strcmp(cmd, "erase") == 0)
printf("erase!/n");
}/*write file to this device*/
if (strcmp(cmd, "write") == 0)
else
readlen=info.writesize;
write_buf=malloc(readlen);
if(write_buf==null)
else
printf("write buf is ok!/n");
imglen1=imglen;
while(imglen)
}if((write_cnt=write(fd,write_buf,readlen))!=readlen)
else
printf("/rwrite mtd device ok!startaddr=%d",(imglen1-imglen));
imglen-=cnt;
}printf("/n");
return 0;
}if (strcmp(cmd, "read") == 0)
return 1;
}命令格式:
擦除命令:
dataflash_ioctl erase /dev/mtd6
info.size=1968384
info.erasesize=528
info.writesize=528
info.oobsize=0
regcount=0
performing flash erase of length 528 at offset 0x1e06f0 done
erase!
寫入檔案命令:
dataflash_ioctl write /dev/mtd6 /modules/uimage2.6.21
info.size=1968384
info.erasesize=528
info.writesize=528
info.oobsize=0
regcount=0
write!
the input file image len is 1406740!
write buf is ok!
write mtd device ok!startaddr=1406064the file is write ok!
write mtd device ok!startaddr=1406592
修改u-boot的啟動引數
cp.b d023f700 20400000 158000
其中d023f700是mtd6在flash中,u-boot識別的位址,20400000是記憶體位址,0x158000是長度!
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