RaspberryPi

• https://en.wikipedia.org/wiki/Raspberry_Pi

• 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

Info

$ lsb_release -a
No LSB modules are available.
Distributor ID: Raspbian
Description:    Raspbian GNU/Linux 9.4 (stretch)
Release:        9.4
Codename:       stretch

$ uname -a
Linux raspberrypi 4.14.71-v7+ #1145 SMP Fri Sep 21 15:38:35 BST 2018 armv7l GNU/Linux

Install eclipse

• apt-get install eclipse-platform

Blink led port 26

• https://www.raspberrypi.org/documentation/usage/gpio/python/README.md

• https://gpiozero.readthedocs.io/en/stable/

• python drive_gpio26.py

   1 # drive_gpio26.py
   2 from gpiozero import LED
   3 from time import sleep
   4 
   5 led = LED(26)
   6 
   7 while True:
   8     led.on()
   9     sleep(1)
  10     led.off()
  11     sleep(1)