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1、安装 ckermit | ||
sudo apt-get install ckermit | ||
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2、编辑配置文件 vim ~/.mykermrc,写入以下内容: | ||
set line /dev/ttyUSB0 | ||
set speed 115200 | ||
set carrier-watch off | ||
set handshake none | ||
set flow-control none | ||
robust | ||
set file type bin | ||
set file name lit | ||
set rec pack 1000 | ||
set send pack 1000 | ||
set windows 5 | ||
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3、# lsmod | grep usbserial | ||
如果有 usbserial,usbserial 33019 1 ch341 之类的信息则说明系统支持USB转串口 | ||
如果没有则 sudo apt-get install setserial | ||
插上USB转串口,在终端输入命令 # dmesg | grep ttyUSB0,如果出现连接成功信息,则说明ubuntu系统已经识别该设备。 | ||
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4、在 root 权限下打开 kermit | ||
sudo kermit -c | ||
出现分割线后,敲回车,再输入树莓派用户名、密码即可 |
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# Raspberry-Pi | ||
Learning Raspberry Pi |
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1、 | ||
sudo nano /etc/wpa_supplicant/wpa_supplicant.conf | ||
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2、 | ||
在文件的底部添加 wifi 信息: | ||
network={ | ||
ssid=”zhrq95 – wifi” | ||
psk=”123456789″ | ||
key_mgmt=WPA-PSK | ||
} | ||
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3、 | ||
wpa-supplicant 在几秒钟内应该就会注意到设置已经改变了,并且会尝试去连接这个网络。 | ||
如果没有,那么就需要使用 sudo ifdown wlan0 和 sudo ifup wlan0 命令手动重启接口; | ||
或者直接使用 sudo reboot 命令重启树莓派 | ||
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4、 | ||
使用 ifconfig wlan0 命令确认是否已经成功连接上网络: | ||
如果inet addr中已经有地址了,说明树莓派成功连接上了网络; | ||
如果没有,检查 wifi 密码和 ESSID 是否正确。 |
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树莓派3b 的主控芯片内部,将串口分配改了芯片内部集成的蓝牙,所以导致串口不能使用(Putty连接后会一直保持黑屏)。 | ||
为了能够使用 TTL 串口登录树莓派,需要修改根文件夹下 boot 里的 config.txt 文件。 | ||
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输入命令: | ||
pi@raspberrypi:~ $ sudo nano /boot/config.txt | ||
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打开config.txt文件,在最后一行加上 | ||
dtoverlay=pi3-miniuart-bt | ||
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保存退出,重启启动树莓派,就可以使用TTL串口登录了 | ||
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注:若在树莓派3启动完成后,打开串口登录,需要先回车,要不然不会跳到输入用户名 |
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sudo apt-get install omxplayer | ||
一般系统默认已经安装好了 | ||
播放视频需要通过 HDMI 连接到显示器看 | ||
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sudo omxplayer -r -o [both,local,hdmi] 文件名 | ||
例: | ||
omxplayer -o hdmi /path/to/filename.mp4 | ||
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-o 说明了输出源,-o hdmi 表示音频直接通过 HDMI 播放 | ||
-r 说明全屏幕播放 | ||
'+' 和'-'按键控制播放的声音大小 | ||
按左右箭头快进 | ||
按 q 退出 |