IMX6学习记录(18)-分析官方镜像制作文件

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1.源码

打开/home/jun/i.mx6/sdk/SDK_2.2_MCIM6ULL/tools/imgutil/evkmcimx6ull下面的mkimage.sh文件

#!/bin/bash

function usage()
{
  echo "Usage: $0 target"
  echo "       target: ram -- the image will be loaded to RAM and run, the application must be built with ram link file"
  echo "       target: flash -- the image will be run on flash directly, the application must be build with flash link file"
  echo "       target: sd -- the image will be loaded from SD to RAM and run, the application must be build with ram link file"
  echo "Example: $0 ram"
}

if [ "$#" -ne 1 ]; then
  usage $0
  exit 1
fi

SYSTEM=`uname -s`
if [ $SYSTEM == "Linux" ]; then
    DCD_BUILDER=dcdgen.bin
    IMG_BUILDER=imgutil.bin
else
    DCD_BUILDER=dcdgen.exe
    IMG_BUILDER=imgutil.exe
fi

../bin/$DCD_BUILDER dcd.config dcd.bin
if [ "$1" == "ram" ]; then
    ../bin/$IMG_BUILDER --combine base_addr=0x80000000 ivt_offset=0x1000 app_offset=0x2000 dcd_file=dcd.bin app_file=sdk20-app.bin ofile=sdk20-app.img image_entry_point=0x80002000
elif [ "$1" == "flash" ]; then
    ../bin/$IMG_BUILDER --combine base_addr=0x60000000 ivt_offset=0x1000 app_offset=0x2000 dcd_file=dcd.bin app_file=sdk20-app.bin ofile=sdk20-app.img image_entry_point=0x60002000
elif [ "$1" == "sd" ]; then
    ../bin/$IMG_BUILDER --combine base_addr=0x80000000 ivt_offset=0x400 app_offset=0x2000 dcd_file=dcd.bin app_file=sdk20-app.bin ofile=sdk20-app.img image_entry_point=0x80002000
else
    echo "Unsupported target $1"
    usage $0
fi

2.分析

#!/bin/bash

function usage()
{
  echo "Usage: $0 target"
  echo "       target: ram -- the image will be loaded to RAM and run, the application must be built with ram link file"
  echo "       target: flash -- the image will be run on flash directly, the application must be build with flash link file"
  echo "       target: sd -- the image will be loaded from SD to RAM and run, the application must be build with ram link file"
  echo "Example: $0 ram"
}

if [ "$#" -ne 1 ]; then
  usage $0
  exit 1
fi

如果输入不带参数，就打印这一段信息出来，可以尝试一下

SYSTEM=`uname -s`
if [ $SYSTEM == "Linux" ]; then
    DCD_BUILDER=dcdgen.bin
    IMG_BUILDER=imgutil.bin
else
    DCD_BUILDER=dcdgen.exe
    IMG_BUILDER=imgutil.exe
fi

判断当前实在linux环境还是windows环境下，会加载不同的文件

../bin/$DCD_BUILDER dcd.config dcd.bin
if [ "$1" == "ram" ]; then
    ../bin/$IMG_BUILDER --combine base_addr=0x80000000 ivt_offset=0x1000 app_offset=0x2000 dcd_file=dcd.bin app_file=sdk20-app.bin ofile=sdk20-app.img image_entry_point=0x80002000
elif [ "$1" == "flash" ]; then
    ../bin/$IMG_BUILDER --combine base_addr=0x60000000 ivt_offset=0x1000 app_offset=0x2000 dcd_file=dcd.bin app_file=sdk20-app.bin ofile=sdk20-app.img image_entry_point=0x60002000
elif [ "$1" == "sd" ]; then
    ../bin/$IMG_BUILDER --combine base_addr=0x80000000 ivt_offset=0x400 app_offset=0x2000 dcd_file=dcd.bin app_file=sdk20-app.bin ofile=sdk20-app.img image_entry_point=0x80002000
else
    echo "Unsupported target $1"
    usage $0
fi

重点地方，判断是哪种文件类型，写入对应的地址

也就是这里，限制了文件名必须是sdk20-app

个人感觉是个很傻的操作