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Dobrica Pavlinušić's random unstructured stuff
RaspberryPi: Revision 42
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{tag_list: raspberrypi} ^ Interestring projects TODO: test them out and write full description on this wiki :-) * FreeLSS is a laser scanning program for the Raspberry Pi. It allows a Raspberry Pi to function as the core to a complete turn table laser scanning system. ** https://github.com/hairu/freelss * PWM on the Raspberry pi - done properly (in hardware, stable) ** https://github.com/sarfata/pi-blaster * https://github.com/ali1234/raspi-teletext * https://github.com/jgarff/rpi_ws281x * distcc setup http://openframeworks.cc/setup/raspberrypi/Raspberry-Pi-DISTCC-guide.html * u-boot on sdcard for nfs boot: http://elinux.org/RPi_U-Boot * RF transmitter for Raspberry Pi https://github.com/F5OEO/rpitx ^ [OV7670] * http://www.raspberrypi.org/phpBB3/viewtopic.php?uid=25856&f=44&t=11839&start=0 ^ DHT11/DHT22 * http://www.tortosaforum.com/raspberrypi/dht11driver.htm * http://learn.adafruit.com/dht-humidity-sensing-on-raspberry-pi-with-gdocs-logging/overview ^ [BlinkM] + i2c * http://www.raspberrypi.org/forums/viewtopic.php?t=11969 ^ CEC - control your TV http://www.raspberrypi.org/forum/viewtopic.php?f=35&t=15749 .pre root@raspberrypi:/home/pi# git clone https://github.com/Pulse-Eight/libcec.git root@raspberrypi:/home/pi# cd libcec/ root@raspberrypi:/home/pi/libcec# apt-get install autoconf automake libtool liblockdev1-dev libudev-dev libraspberrypi-dev root@raspberrypi:/home/pi/libcec# sh -x bootstrap root@raspberrypi:/home/pi/libcec# ./configure --with-rpi-include-path=/opt/vc/include/ --with-rpi-lib-path=/opt/vc/lib/ ############################################################################## libCEC version 2:1:0 configured Compilation flags: CXXFLAGS : -g -O2 -fPIC -Wall -Wextra -Wno-missing-field-initializers -Wno-psabi libCEC LDFLAGS : -lbcm_host -llockdev -lrt -ldl -lpthread -L/opt/vc/lib/ -lvcos -lvchiq_arm -ludev client LDFLAGS : -lrt -ldl -lpthread Configured features: Pulse-Eight CEC Adapter : yes Pulse-Eight CEC Adapter detection : yes Raspberry Pi support : yes TDA995x support : no You can now build libCEC by running: make ############################################################################## make install .pre ^^ TV on .pre pi@raspberrypi ~ $ echo "on 0" | cec-client -s .pre ^ Hints from forum ^^ screen saver http://www.raspberrypi.org/phpBB3/viewtopic.php?p=84831#p84831 .pre # prevent screensaver from powering down display setterm -blank 0 -powerdown 0 > /dev/tty0 # clear the display and turn off the flashing cursor clear > /dev/tty0 setterm -cursor 0 > /dev/tty0 # turn the cursor back on when done with omxplayer setterm -cursor 1 > /dev/tty0 .pre ^^ YouTube transcoding in VLC http://www.raspberrypi.org/phpBB3/viewtopic.php?p=163658#p163658 .pre cvlc 'youtube.com/watch?v=XXXXXXXXXX' :sout='#transcode{vcodec=h264,vb=0,fps=0,scale=0,height=720,acodec=mp4a,ab=128,channels=2,samplerate=44100}:http{mux=ffmpeg{mux=flv},dst=:8080/youtube}' :sout-keep .pre ^ Education materials * http://pi.cs.man.ac.uk/download/Raspberry_Pi_Education_Manual.pdf * http://www.ocr.org.uk/qualifications/by-subject/computing/raspberry-pi/ * http://www.cl.cam.ac.uk/projects/raspberrypi/ ^ Raspberry Pi Accessories Starter Kit http://www.conrad.com/ce/en/product/409208/Raspberry-Pi-Accessories-Starter-Kit?ref=searchDetail * 1x Rapberry sticker * Power supply for the Raspberry * Sturdy acrylic housing, which includes all possible connections for this Raspberry and perfectly protects * 4 GB SD card to store your programs ** https://learn.adafruit.com/adafruit-raspberry-pi-lesson-1-preparing-and-sd-card-for-your-raspberry-pi * USB Micro Card Reader * USB cable (for power supply or the power supply of a PC) * 3 m Ethernet cable ** https://learn.adafruit.com/adafruits-raspberry-pi-lesson-6-using-ssh ** https://learn.adafruit.com/adafruit-raspberry-pi-lesson-7-remote-control-with-vnc * TTL USB cable ** https://learn.adafruit.com/adafruits-raspberry-pi-lesson-5-using-a-console-cable/test-and-configure * PI Cobbler (KIT hereby connect the RP with other circuit boards) * Large breadboard circuit * Colored board cable connector * 5x 560 ohm resistors (for LEDS) * 3x LED's (red, green, blue) ** https://learn.adafruit.com/raspberry-pi-e-mail-notifier-using-leds ** https://learn.adafruit.com/debugging-with-the-raspberry-pi-webide/debug-a-blinking-led * 5x 10K resistors (for buttons) * 3x pushbutton ** https://learn.adafruit.com/playing-sounds-and-using-buttons-with-raspberry-pi/bread-board-setup-for-input-buttons * 1x photocell ** https://learn.adafruit.com/basic-resistor-sensor-reading-on-raspberry-pi/basic-photocell-reading * 1x 1uf capacitor (for photocell) ^ GPU * FFT ** http://www.raspberrypi.org/accelerating-fourier-transforms-using-the-gpu/ ** https://github.com/raspberrypi/userland/tree/master/host_applications/linux/apps/hello_pi/hello_fft/qasm * SHA-256 ** http://rpiplayground.wordpress.com/ ** https://github.com/elorimer/rpi-playground/tree/master/QPU * Machine learning - the Deep Belief image recognition SDK ** http://petewarden.com/2014/06/09/deep-learning-on-the-raspberry-pi/ ** http://scientistnobee.wordpress.com/2014/06/20/machine-learning-with-raspberry-pi/ ^ Arduino * Connect using I2C http://www.pihomeserver.fr/en/2013/08/13/raspberry-pi-home-server-arduino-lier-les-deux-via-bus-i2c/ ^ JTAG * https://github.com/synthetos/PiOCD/wiki/Using-a-Raspberry-Pi-as-a-JTAG-Dongle ^ Arduino ProMini 3.3V 8MHz ^^ Disable serial port console edit `/boot/cmdline.txt` and remove all ttyAMA0 leaving: .pre pi@raspberrypi ~ $ cat /boot/cmdline.txt dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait bcm2708.w1_gpio_pin=4 .pre also, comment out ttyAMA0 in `/etc/inittab` ^^ connect Arduino serial RX->TX TX->RX https://github.com/dpavlin/avrdude-rpi/tree/fix_channel_in_use pin definitions in GPIO.RPi are physical pins on board *not* BCM or wiring ip! {image: gpio1.png} ^^ flasing .pre dpavlin@blue:~/Arduino/RF433_Sockets$ scp /tmp/build*.tmp/*.hex pi@rpi.tv:/tmp/ RF433_Sockets.cpp.hex 100% 19KB 18.6KB/s 00:00 pi@raspberrypi ~ $ cat avrdude.sh #!/bin/sh hex=`ls -t /tmp/*.hex | head -1` echo "flash hex: $hex" sudo /home/pi/avrdude-rpi/avrdude-autoreset -C /home/pi/avrdude.conf -v -v -patmega328p -carduino -P/dev/ttyAMA0 -b57600 -D -Uflash:w:$hex:i pi@raspberrypi ~ $ ./avrdude.sh flash hex: /tmp/RF433_Sockets.cpp.hex avrdude: Version 6.1, compiled on Sep 17 2014 at 05:41:35 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/ Copyright (c) 2007-2014 Joerg Wunsch System wide configuration file is "/home/pi/avrdude.conf" User configuration file is "/root/.avrduderc" User configuration file does not exist or is not a regular file, skipping Using Port : /dev/ttyAMA0 Using Programmer : arduino Overriding Baud Rate : 57600 done with autoreset strace: |/home/pi/avrdude-rpi/autoreset: Broken pipe strace: |/home/pi/avrdude-rpi/autoreset: Broken pipe AVR Part : ATmega328P Chip Erase delay : 9000 us PAGEL : PD7 BS2 : PC2 RESET disposition : dedicated RETRY pulse : SCK serial program mode : yes parallel program mode : yes Timeout : 200 StabDelay : 100 CmdexeDelay : 25 SyncLoops : 32 ByteDelay : 0 PollIndex : 3 PollValue : 0x53 Memory Detail : Block Poll Page Polled Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- --------- eeprom 65 20 4 0 no 1024 4 0 3600 3600 0xff 0xff flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00 hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00 efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00 lock 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00 calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00 signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00 Programmer Type : Arduino Description : Arduino Hardware Version: 2 Firmware Version: 1.16 Vtarget : 0.0 V Varef : 0.0 V Oscillator : Off SCK period : 0.1 us avrdude: AVR device initialized and ready to accept instructions Reading | ################################################## | 100% 0.01s avrdude: Device signature = 0x1e950f avrdude: safemode: lfuse reads as 0 avrdude: safemode: hfuse reads as 0 avrdude: safemode: efuse reads as 0 avrdude: reading input file "/tmp/RF433_Sockets.cpp.hex" avrdude: writing flash (6770 bytes): Writing | ################################################## | 100% 1.98s avrdude: 6770 bytes of flash written avrdude: verifying flash memory against /tmp/RF433_Sockets.cpp.hex: avrdude: load data flash data from input file /tmp/RF433_Sockets.cpp.hex: avrdude: input file /tmp/RF433_Sockets.cpp.hex contains 6770 bytes avrdude: reading on-chip flash data: Reading | ################################################## | 100% 1.49s avrdude: verifying ... avrdude: 6770 bytes of flash verified avrdude: safemode: lfuse reads as 0 avrdude: safemode: hfuse reads as 0 avrdude: safemode: efuse reads as 0 avrdude: safemode: Fuses OK (E:00, H:00, L:00) strace: |/home/pi/avrdude-rpi/autoreset: Broken pipe strace: |/home/pi/avrdude-rpi/autoreset: Broken pipe strace: |/home/pi/avrdude-rpi/autoreset: Broken pipe strace: |/home/pi/avrdude-rpi/autoreset: Broken pipe strace: |/home/pi/avrdude-rpi/autoreset: Broken pipe avrdude done. Thank you. strace: |/home/pi/avrdude-rpi/autoreset: Broken pipe .pre ^ DS1307 Tiny RTC * http://www.instructables.com/id/Set-up-Real-Time-Clock-RTC-on-Raspberry-Pi/ * http://electronics.stackexchange.com/questions/98361/how-to-modify-ds1307-rtc-to-use-3-3v-for-raspberry-pi Check if module has 5V pull-up I2C resistors! If it does (like Tiny RTC has R2 and R3) you will have to remove them. {image: tiny-rtc-3.3v-remote-r2-r3.jpg} .pre root@raspberrypi:/home/pi# apt-get install i2c-tools root@raspberrypi:/home/pi# modprobe i2c-dev root@raspberrypi:/home/pi# i2cdetect -y 1 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- 68 -- -- -- -- -- -- -- 70: -- -- -- -- -- -- -- -- root@raspberrypi:/home/pi# modprobe rtc-ds1307 root@raspberrypi:/home/pi# echo ds1307 0x68 > /sys/class/i2c-adapter/i2c-1/new_device root@raspberrypi:/home/pi# hwclock --systohc -D --noadjfile --utc hwclock from util-linux 2.20.1 Using /dev interface to clock. Assuming hardware clock is kept in UTC time. Time elapsed since reference time has been 0.722720 seconds. Delaying further to reach the new time. Setting Hardware Clock to 11:53:41 = 1429876421 seconds since 1969 ioctl(RTC_SET_TIME) was successful. .pre ^^ DS18B20 .pre root@raspberrypi:/home/pi# grep w1 /boot/config.txt dtoverlay=w1-gpio # reboot root@raspberrypi:/home/pi# cat /sys/bus/w1/devices/28-0000043c5507/w1_slave 50 05 4b 46 7f ff 0c 10 1c : crc=1c YES 50 05 4b 46 7f ff 0c 10 1c t=85000 .pre Hmm, you will also want to remove R1 pullup to make it work? ^ avrdude Using Raspberry Pi as Arduino ISP programmer * https://github.com/onandoffables/avrdude-linuxgpio .pre root@raspberrypi:/home/pi# avrdude -c linuxgpio -p atmega328p avrdude: AVR device initialized and ready to accept instructions Reading | ################################################## | 100% 0.00s avrdude: Device signature = 0x1e950f avrdude: safemode: Fuses OK (E:05, H:DA, L:FF) avrdude done. Thank you. .pre ^ logic analyzer * bare metal: https://github.com/tuxyme/metal-pi * Panalyzer - a RaspberryPi based Logic Analyzer https://github.com/richardghirst/Panalyzer ^ rotary encoder http://www.bobrathbone.com/raspberrypi_rotary.htm ^ SWD http://www.disk91.com/2015/technology/programming/swd-programming-using-a-raspberrypi/ https://github.com/disk91/PySWD .pre pi@raspberrypi ~ $ git clone https://github.com/disk91/PySWD pi@raspberrypi ~ $ cd PySWD/ .pre ^ PIC * rpp - PIC Programmer using GPIO http://holdenc.altervista.org/rpp/ * http://mujweb.cz/tlc/rpp/ * https://www.raspberrypi.org/forums/viewtopic.php?f=44&t=14689&start=75 * https://github.com/oh7bf/PiPIC |