ti processor sdk linux am335x evm /bin/setup-minicom.sh hacking

#!/bin/sh

#
#   ti processor sdk linux am335x evm /bin/setup-minicom.sh hacking
# 说明：
#     本文主要对TI的sdk中的setup-minicom.sh脚本进行解读，是为了了解
# 其工作机制。
#
#                                      2016-4-16 深圳 南山平山村 曾剑锋

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cwd=`dirname $0`
. $cwd/common.sh


minicomcfg=${HOME}/.minirc.dfl

cat << EOM

--------------------------------------------------------------------------------"
This step will set up minicom (serial communication application) for
SDK development


For boards that contain a USB-to-Serial converter on the board such as:
    * BeagleBone
    * Beaglebone Black
    * AM335x EVM-SK

the port used for minicom will be automatically detected. By default Ubuntu
will not recognize this device. Setup will add a udev rule to
/etc/udev/ so that from now on it will be recognized as soon as the board is
plugged in.

For other boards, the serial will defualt to /dev/ttyS0. Please update based
on your setup.

--------------------------------------------------------------------------------

EOM

默认的端口
portdefault=/dev/ttyS0

echo ""
echo "NOTE: If your using any of the above boards simply hit enter"
echo "and the correct port will be determined automatically at a"
echo "later step.  For all other boards select the serial port"
echo "that the board is connected to."
echo "Which serial port do you want to use with minicom?"
read -p "[ $portdefault ] " port

# 如果没有输入，那么就是用默认配置
if [ ! -n "$port" ]; then
    port=$portdefault
fi

# 备份之前的配置
if [ -f $minicomcfg ]; then
    cp $minicomcfg $minicomcfg.old
    echo
    echo "Copied existing $minicomcfg to $minicomcfg.old"
fi

echo "pu port             $port
pu baudrate         115200
pu bits             8
pu parity           N
pu stopbits         1
pu minit
pu mreset
pu mdialpre
pu mdialsuf
pu mdialpre2
pu mdialsuf2
pu mdialpre3
pu mdialsuf3
pu mconnect
pu mnocon1          NO CARRIER
pu mnocon2          BUSY
pu mnocon3          NO DIALTONE
pu mnocon4          VOICE
pu rtscts           No" | tee $minicomcfg > /dev/null  
# tee：读取标准输入的数据，并将其内容输出成文件。
check_status

echo
echo "Configuration saved to $minicomcfg. You can change it further from inside"
echo "minicom, see the Software Development Guide for more information."
echo "--------------------------------------------------------------------------------"