RaspberryPi

• Kit in https://www.chiptec.net/pcs-e-mobilidade/computadores/raspberrypi/kit-raspberry-pi-3-modelo-b-noobs-caixa-carregador-preto.html

• Access GPIO https://elinux.org/RPi_GPIO_Code_Samples#C

• https://elinux.org/RPi_GPIO_Code_Samples#sysfs

BCM2835

• Timers
• Interrupt controller
• GPIO
• USB
• PCM / I2S
• DMA controller
• I2C master
• I2C / SPI slave
• SPI0, SPI1, SPI2
• PWM
• UART0, UART1

Install and configure screensaver and lock screen

• sudo apt-get install xscreensaver
• Preferences, Screen saver
• Auto lock after 2 minutes
• Create new menu item (Preferences, Main menu editor)
  • Menu item name Lock
  • Command: xscreensaver-comand -lock
  • Icon: /usr/share/lxpanel/images/ns-lock.png