1: 2021-09-07 (火) 09:39:03 takaboo | |||
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+ | ***various internal value monitors [#r560210a] | ||
+ | $ watch -n 1 sudo vcgencmd measure_clock arm | ||
+ | $ watch -n 1 sudo vcgencmd measure_volts | ||
+ | $ watch -n 1 sudo vcgencmd measure_temp | ||
+ | *+*stop rpi3 boot splash [#t2669980] | ||
+ | /boot/config.txt | ||
+ | add disable_splash=1 | ||
+ | |||
+ | cd /boot | ||
+ | sudo mkdir /media/restorey | ||
+ | sudo mount /dev/mmcblk0p1/media/recovery/ | ||
+ | sudo cp config.txt /media/recovery/ | ||
+ | sudo restart | ||
+ | |||
+ | ***gpio heartbeat [#u4e95b61] | ||
+ | dtparam=act_led_trigger=heartbeat | ||
+ | dtoverlay=act-led,gpio=16 | ||
+ | |||
+ | ***use gpio on ubuntu [#lf884468] | ||
+ | sudo apt-get install wiringpi | ||
+ | |||
+ | sudo dpkg --add-architecture armhf | ||
+ | sudo apt-get install libc6 | ||
+ | sudo apt-get install libc6:armhf libgcc1:armhf | ||
+ | |||
+ | sudo apt-get install wget | ||
+ | |||
+ | cd /tmp | ||
+ | wget https://project-downloads.drogon.net/wiringpi-latest.deb | ||
+ | sudo dpkg -i wiringpi-latest.deb | ||
+ | |||
+ | |||
+ | $ gpio -v | ||
+ | gpio version: 2.52 | ||
+ | Copyright (c) 2012-2018 Gordon Henderson | ||
+ | This is free software with ABSOLUTELY NO WARRANTY. | ||
+ | For details type: gpio -warranty | ||
+ | |||
+ | Raspberry Pi Details: | ||
+ | Type: Pi 4B, Revision: 04, Memory: 8192MB, Maker: Sony | ||
+ | * Device tree is enabled. | ||
+ | *--> Raspberry Pi 4 Model B Rev 1.4 | ||
+ | * This Raspberry Pi supports user-level GPIO access. |