#!/bin/sh#
#   ti processor sdk linux am335x evm /bin/setup-uboot-env.sh hacking
# 说明：
#     本文主要对TI的sdk中的setup-uboot-env.sh脚本进行解读，是为了了解
# 其工作机制，另外了解到minicom原来是可以用脚本来和开发板进行交互的。
#
#                                      2016-4-16 深圳 南山平山村 曾剑锋# This distribution contains contributions or derivatives under copyright
# as follows:
#
# Copyright (c) 2010, Texas Instruments Incorporated
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# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.cwd=`dirname $0`
. $cwd/common.shdo_expect() {echo "expect {" >> $3check_statusecho "    $1" >> $3check_statusecho "}" >> $3check_statusecho $2 >> $3check_statusecho >> $3
}echo
echo "--------------------------------------------------------------------------------"
echo "This step will set up the U-Boot variables for booting the EVM."
echo#
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $1 }'
# 192.168.236.130
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ ifconfig | grep 'inet addr:'
#           inet addr:192.168.236.130  Bcast:192.168.236.255  Mask:255.255.255.0
#           inet addr:127.0.0.1  Mask:255.0.0.0
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ ifconfig
# eth0      Link encap:Ethernet  HWaddr 00:0c:29:52:ca:98
#           inet addr:192.168.236.130  Bcast:192.168.236.255  Mask:255.255.255.0
#           inet6 addr: fe80::20c:29ff:fe52:ca98/64 Scope:Link
#           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
#           RX packets:4726 errors:0 dropped:0 overruns:0 frame:0
#           TX packets:2321 errors:0 dropped:0 overruns:0 carrier:0
#           collisions:0 txqueuelen:1000
#           RX bytes:6424263 (6.4 MB)  TX bytes:164155 (164.1 KB)
#           Interrupt:19 Base address:0x2024
#
# lo        Link encap:Local Loopback
#           inet addr:127.0.0.1  Mask:255.0.0.0
#           inet6 addr: ::1/128 Scope:Host
#           UP LOOPBACK RUNNING  MTU:16436  Metric:1
#           RX packets:88 errors:0 dropped:0 overruns:0 frame:0
#           TX packets:88 errors:0 dropped:0 overruns:0 carrier:0
#           collisions:0 txqueuelen:0
#           RX bytes:7092 (7.0 KB)  TX bytes:7092 (7.0 KB)
#
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ ifconfig | grep 'inet addr:'
#           inet addr:192.168.236.130  Bcast:192.168.236.255  Mask:255.255.255.0
#           inet addr:127.0.0.1  Mask:255.0.0.0
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ ifconfig | grep 'inet addr:'| grep -v '127.0.0.1'
#           inet addr:192.168.236.130  Bcast:192.168.236.255  Mask:255.255.255.0
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2
# 192.168.236.130  Bcast
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $1 }'
# 192.168.236.130
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$
#
ipdefault=`ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $1 }'`
# platform=am335x-evm
platform=`grep PLATFORM= $cwd/../Rules.make | cut -d= -f2`echo "Autodetected the following ip address of your host, correct it if necessary"
# 采用自动获取的IP还是手动设置的IP
read -p "[ $ipdefault ] " ip
echo
if [ ! -n "$ip" ]; thenip=$ipdefault
fi# 设置NFS根文件目录
if [ -f $cwd/../.targetfs ]; thenrootpath=`cat $cwd/../.targetfs`
elseecho "Where is your target filesystem extracted?"read -p "[ ${HOME}/targetNFS ]" rootpathif [ ! -n "$rootpath" ]; thenrootpath="${HOME}/targetNFS"fiecho
fi# 设置kernel相关的变量
kernelimage="zImage-""$platform"".bin"
kernelimagesrc=`ls -1 $cwd/../board-support/prebuilt-images/$kernelimage`
kernelimagedefault=`basename $kernelimagesrc`# 设置Linux kernel位置，TFTP还是SD card中
echo "Select Linux kernel location:"
echo " 1: TFTP"
echo " 2: SD card"
echo
read -p "[ 1 ] " kernelif [ ! -n "$kernel" ]; thenkernel="1"
fi# 设置文件系统路径，NFS还是SD card中
echo
echo "Select root file system location:"
echo " 1: NFS"
echo " 2: SD card"
echo
read -p "[ 1 ] " fsif [ ! -n "$fs" ]; thenfs="1"
fiif [ "$kernel" -eq "1" ]; thenechoecho "Available kernel images in /tftproot:"for file in /tftpboot/*; dobasefile=`basename $file`echo "    $basefile"doneechoecho "Which kernel image do you want to boot from TFTP?"read -p "[ $kernelimagedefault ] " kernelimageif [ ! -n "$kernelimage" ]; thenkernelimage=$kernelimagedefaultfi
fiisBB="n"
isBBBlack="n"
isBBrevA3="n"
configBB="n"# 个人认为这里是Ubuntu PC机已经和开发板通过USB连接了，然后这里就可以自动检测出开发板的类型。
check_for_beaglebone() {# First check if there is a rev A3 board which uses the custom VID/PID# combinationlsusb -d 0403:a6d0 > /dev/nullif [ "$?" = "0" ]then# We found a beagleboneisBB="y"isBBrevA3="y"returnfi# Now let's check for a standard VID/PID like newer BeagleBones havesudo lsusb -vv -d 0403:6010 | grep "Product" | grep "BeagleBone" > /dev/nullif [ "$?" = "0" ]thenisBB="y"returnfi# Now let's check for EVM-SKsudo lsusb -vv -d 0403:6010 | grep "Product" | grep "EVM-SK" > /dev/nullif [ "$?" = "0" ]thenisBB="y"returnfi# Now let's check for BeagleBone Blacksudo lsusb -vv -d 0403:6001 > /dev/nullif [ "$?" = "0" ]thenisBB="y"isBBBlack="y"returnfi}#
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00/bin$ ls -al setupBoard.minicom
# -rw-rw-r-- 1 Qt Qt 601 Aug 14  2015 setupBoard.minicom
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00/bin$ cat setupBoard.minicom
# timeout 300
# verbose on
# expect {
#     "stop autoboot:"
# }
# send " "
#
# expect {
#     "U-Boot#"
# }
# send "env default -f -a"
#
# expect {
#     "U-Boot#"
# }
# send "saveenv"
#
# expect {
#     "U-Boot#"
# }
# send "reset"
#
# expect {
#     "stop autoboot:"
# }
# send " "
#
# expect {
#     "U-Boot#"
# }
# send "setenv ip_method none"
#
# expect {
#     "U-Boot#"
# }
# send "setenv bootfile zImage"
#
# expect {
#     "U-Boot#"
# }
# send setenv bootcmd 'mmc rescan; run loadimage; run findfdt; run loadfdt; run mmcargs; bootz ${loadaddr} - ${fdtaddr}'
#
# expect {
#     "U-Boot#"
# }
# send "saveenv"
#
# expect {
#     "U-Boot#"
# }
# send "boot"
#
# ! killall -s SIGHUP minicom
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00/bin$ echo "timeout 300" > $cwd/setupBoard.minicom
echo "verbose on" >> $cwd/setupBoard.minicomdo_expect "\"stop autoboot:\"" "send \" \"" $cwd/setupBoard.minicom
do_expect "\"U-Boot#\"" "send \"env default -f -a\"" $cwd/setupBoard.minicom
do_expect "\"U-Boot#\"" "send \"saveenv\"" $cwd/setupBoard.minicom
do_expect "\"U-Boot#\"" "send \"reset\"" $cwd/setupBoard.minicom
do_expect "\"stop autoboot:\"" "send \" \"" $cwd/setupBoard.minicom# 根据前面的配置，将相关参数设置到setupBoard.minicom对应的文件里。
if [ "$kernel" -eq "1" ]; thenif [ "$fs" -eq "1" ]; then#TFTP and NFS Bootdo_expect "\"U-Boot#\"" "send \"setenv serverip $ip\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send setenv rootpath '$rootpath'" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"setenv bootfile $kernelimage\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"setenv ip_method dhcp\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send setenv bootcmd 'run findfdt; setenv autoload no;dhcp ;tftp \${loadaddr} $kernelimage; tftp \${fdtaddr} \${fdtfile}; run netargs; bootz \${loadaddr} - \${fdtaddr}'" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"saveenv\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"boot\"" $cwd/setupBoard.minicomelse#TFTP and SD Bootdo_expect "\"U-Boot#\"" "send \"setenv serverip $ip\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"setenv bootfile $kernelimage\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"setenv ip_method none\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send setenv bootcmd 'run findfdt; setenv autoload no; dhcp ; tftp \${loadaddr} $kernelimage; tftp \${fdtaddr} \${fdtfile}; run mmcargs; bootz \${loadaddr} - \${fdtaddr}'" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"saveenv\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"boot\"" $cwd/setupBoard.minicomfi
elseif [ "$fs" -eq "1" ]; then#SD and NFS Bootdo_expect "\"U-Boot#\"" "send \"setenv serverip $ip\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send setenv rootpath '$rootpath'" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"setenv bootfile zImage\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"setenv ip_method dhcp\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send setenv bootcmd 'setenv autoload no; mmc rescan; run loadimage; run findfdt; run loadfdt; run netargs; bootz \${loadaddr} - \${fdtaddr}'" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"saveenv\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"boot\"" $cwd/setupBoard.minicomelse#SD and SD boot.do_expect "\"U-Boot#\"" "send \"setenv ip_method none\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"setenv bootfile zImage\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send setenv bootcmd 'mmc rescan; run loadimage; run findfdt; run loadfdt; run mmcargs; bootz \${loadaddr} - \${fdtaddr}'" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"saveenv\"" $cwd/setupBoard.minicomdo_expect "\"U-Boot#\"" "send \"boot\"" $cwd/setupBoard.minicomfi
fi
echo "! killall -s SIGHUP minicom" >> $cwd/setupBoard.minicomecho "--------------------------------------------------------------------------------"
echo "Would you like to create a minicom script with the above parameters (y/n)?"
read -p "[ y ] " minicom
echoif [ ! -n "$minicom" ]; thenminicom="y"
fiif [ "$minicom" = "y" ]; thenecho -n "Successfully wrote "# readlink是linux系统中一个常用工具，主要用来找出符号链接所指向的位置readlink -m $cwd/setupBoard.minicom
fi# 检查是否有设备已经连接上来了，如果有设备已经连接，那么设置对应的配置。
while [ yes ]
do# 检查开发板类型check_for_beagleboneif [ "$isBB" = "y" ]thenecho ""echo "A BeagleBone (Black) or StarterKit board has been detected"echo "Do you want to configure U-Boot for one of the boards mentioned"echo "above? An answer of 'n' will configure U-Boot for the"echo "General Purpose EVM instead"read -p "(y/n) " configBBechoif [ "$configBB" = "y" ] || [ "$configBB" = "n" ]thenbreakelseecho "Invalid response"echocontinuefielseecho ""echo "No BeagleBone (Black) or StarterKit detected. Assuming"echo "general purpose evm is being used. Is this correct?"read -p "(y/n) " validevmecho ""if [ "$validevm" = "y" ]thenconfigBB="n"breakelseif [ "$validevm" != "n" ]thenecho "Invalid response"echocontinuefiecho "Please connect the Beaglebone (Black) or StarterKit to the PC"echo "If your using the StarterKit board make sure it is turned on"read -p "Press any key to try checking again." tempfifi
done# 如果插入的是BB开发板
if [ "$configBB" = "y" ]
thenftdiInstalled=`lsmod | grep ftdi_sio`if [ -z "$ftdiInstalled" ]; then#Add the ability to regconize the BeagleBone as two serial portsif [ "$isBBrevA3" = "y" ]thenecho "Finishing install by adding drivers for Beagle Bone..."# 添加Beagle Bone USB驱动sudo modprobe -q ftdi_sio vendor=0x0403 product=0xa6d0#Create uDev rule# 添加Beagle Bone udev规则echo "# Load ftdi_sio driver including support for XDS100v2." > $cwd/99-custom.rulesecho "SYSFS{idVendor}=="0403", SYSFS{idProduct}=="a6d0", \\" >>  $cwd/99-custom.rulesecho "RUN+=\"/sbin/modprobe -q ftdi_sio vendor=0x0403 product=0xa6d0\"" >> $cwd/99-custom.rulessudo cp $cwd/99-custom.rules /etc/udev/rules.d/rm $cwd/99-custom.ruleselsesudo modprobe -q ftdi_siofifi#infinite loop to look for board unless user asks to stop# 循环检查开发板是否连接上PCwhile [ yes ]doecho "Detecting connection to board..."loopCount=0port=`dmesg | grep FTDI | grep "tty" | tail -1 | grep "attached" |  awk '{ print $NF }'`while [ -z "$port" ] && [ "$loopCount" -ne "10" ]do#count to 10 and timeout if no connection is foundloopCount=$((loopCount+1))sleep 1port=`dmesg  | grep FTDI | grep "tty" | tail -1 | grep "attached" |  awk '{ print $NF }'`done#check to see if we actually found a portif [ -n "$port" ]; thenbreak;fi#if we didn't find a port and reached the timeout limit then ask to reconnectif [ -z "$port" ] && [ "$loopCount" = "10" ]; thenecho ""echo "Unable to detect which port the board is connected to."echo "Please reconnect your board."echo "Press 'y' to attempt to detect your board again or press 'n' to continue..."read -p "(y/n)" retryBoardDetectionfi#if they choose not to retry, ask user to reboot manually and exitif [ "$retryBoardDetection" = "n" ]; thenecho ""echo "Please reboot your board manually and connect using minicom."exit;fidone#Change minicom to accurately reflect the bone# 重新配饰minicom参数minicomcfg=${HOME}/.minirc.dflecho "pu port             /dev/$portpu baudrate         115200pu bits             8pu parity           Npu stopbits         1pu minitpu mresetpu mdialprepu mdialsufpu mdialpre2pu mdialsuf2pu mdialpre3pu mdialsuf3pu mconnectpu mnocon1          NO CARRIERpu mnocon2          BUSYpu mnocon3          NO DIALTONEpu mnocon4          VOICEpu rtscts           No" | tee $minicomcfg > /dev/nullcheck_status
fiecho "Would you like to run the setup script now (y/n)? For the general purpose evm "
echo "you must now connect the RS-232 cable to your evm now. For the Beaglebone (Black)"
echo "or StarterKit this step should of already have been done. Also connect the ethernet"
echo "cable as described in the Quick Start Guide."
echo "**Important**"
echo "Once answering 'y' on the prompt below you will have 300 seconds to turn on the"
echo "board or if it was already on reboot the board before the setup times out"
echo
echo "After successfully executing this script, your board will be set up. You will be "
echo "able to connect to it by executing 'minicom -w' or if you prefer a windows host"
echo "you can set up Tera Term as explained in the Software Developer's Guide."
echo "If you connect minicom or Tera Term and power cycle the board Linux will boot."
echo
read -p "[ y ] " minicomsetupif [ ! -n "$minicomsetup" ]; then
minicomsetup="y"
fiif [ "$minicomsetup" = "y" ]; then
cd $cwd
# 这里相当于用minicom运行minicom脚本
sudo minicom -w -S setupBoard.minicom
cd -
fiecho "You can manually run minicom in the future with this setup script using: minicom -S $cwd/setupBoard.minicom"
echo "--------------------------------------------------------------------------------"