AlaMode User Manual
Contents
1. miw da Za S xB YAm Su ai is NWN GMA WYF AU UT SU Co pu H Dita angie Crin ddd rapper Pro Zei lt eth Ap Doar rr Out ASA ai GLEC gezu ou de iii psi some ILE i fa dh m a Tar Aa EA ES Li a Wren a GIE br ae tie 8 54 e fk i tal The Blink sketch is loaded into the IDE Now press the upload icon or press cntrl u to upload the sketch to AlaMode You will see the green LED D6 is blinking which means AlaMode is working 2 If you are using a 5V FTDI cable check the connection then e Select in Arduino menu Tools gt Board gt UNO e Tools gt Serial Port gt dev tty USB0 e File gt Examples gt Basics gt Blink Adding RTC of AlaMode as real time hardware clock for Raspberry Pi via 12C Appreciation to AdaFruit Industries for providing the tutorial This is simply a re writing of that tutorial It is possible to use AlaMode s RTC as a real time hardware clock for Raspberry Pi For this you need LXTerminal Since the DS3231 and the SD 1307 follow the same protocol we can follow the excellent tutorial provided by AdaFruit Industries First you have to get the I2C drivers into the kernel and assuming the user is using the Raspbian distro which already has it in but unfortunately it is disabled so you have to add comment before the two lines Follow the steps on LXTerminal as shown below Alamode User Guide r1 pi raspberrypi sudo2. root raspberrypi home pi echo ds1307 0x68 gt sys class i2c adapter 176 0 men device for revision 1 board oot raspberrypi home pi echo ds1307 0x68 gt sys class i2c Aaa PESE Ze AD ea ea ee for revision 2 beard oot raspberrypi home pi exit If everything goes well then you can check the hwclock time If the time is not correct or if you are not connected to internet you can set the time by running following script It will set this time to hwclock and once the time is correct check it with date command pi raspberrypi sudo hwclock set dare 2013 01 31 209008900 If you are connected to the internet you can instead update the RTC from the system time pi raspberrypi sudo hwclock w and verify it with pi raspberrypi sudo hwclock rr Next time you will like to add the RTC kernel module to the etc modules list so it is loaded automatically when the machine boots For this run pi raspberrypi sudo nano etc modules and add rtc ds1307 at the last line i e after i2c dev and save it 11 Sey Alamode User Guide r1 It is also required to create the DS1307 device creation at boot edit ete rc local by running pi raspberrypi sudo nano etc rc local And add after line containing fi note V is a continuation line that means the command continues on the next line pi raspberrypi sudo modprobe rtc ds1307 pi raspberrypi echo ds1307 0x68 gt a ys elass iz2c adepte
3. com docs Alamode AlaMode_V1datasheet pdf 17 n vy Lu wh Alamode User Guide r1 Using Board Power By putting a jumper between the middle pin and the one closest to the Arduino chip you select to use the same 5V power as the AlaMode board is using If your AlaMode board is using power from the Raspberry Pi GPIO connector then you will not have much power left for your servos If you are powering your AlaMode from its own mini USB connector then you can supply enough power to run several small servos Using Off Board Power Your second choice for powering the servos is to remove the jumpers from rows 7 and 8 Instead you can connect an external 5Vdc power supply to the pins in rows 7 and 8 Ground connects to pin furthest from the Arduino chip and 5vdc connects to the center pin The pin closest to the Arduino will not be used The Arduino IDE has a sample program for controlling servo motors AlaMode continues to reset If you find that your AlaMode board resets when your servos are running with on board power then you are overloading your power supply Moving the servos is pulling your power supply voltage low enough that the Arduino resets You should either use smaller servos use fewer servos or get a more powerful power supply You should be able to run six micro servos with a 2 1A power supply 18 Alamode User Guide r1 Schematics We have included the schematics for the AlaMode in the following pages for further refe
4. Alamode User Guide r1 AlaMode User Manual Revision 1 0 www wyolum com info wyolum com Ya Alamode User Guide r1 Introduction The AlaMode is an integrated Arduino compatible board It is designed as versatile general purpose data acquisition and control module that stacks on the Raspberry Pi computer and provides a direct connection to Raspberry Pi GPIO connector 26 pins The AlaMode includes AVR ATMEGA328P microcontrollers precision real time clock RTC micro SD card reader reset button amp standard shield headers ATMEGA328P microcontroller includes the Arduino bootloader and works as a bridge between Raspberry PI and Arduino You can use the standard ARDUINO environment and graphical interface for Windows or Linux for the software development and programming this chip through ISP connector or Serial interface USB to Serial TTL converter ATMEGA328P is connected to Raspberry Pi with DC SPI amp Serial UART In AlaMode ATMEGA328P is slave device on I2C bus and Raspberry PI is a master AlaMode board includes 3V 5V buffers to connect Raspberry Pi with ATMEGA328P In AlaMode ATMEGA328P uses 5V signal level It provides an easy way to add analog sensors servos see user contributed notes here GPS modules etc Since the board has standard ARDUINO connectors it allows direct connections to the shields specially made for Arduino Its footprint is similar to that of Raspberry Pi Main Features of AlaMode 1 Pro
5. R Alamode User Guide r1 bk at boot up To retest insert an uSD card in the AlaMode then hit reset on the AlaMode then rerun the test by clicking Run in WeblDE a m Adelruit Learning System Rasberry Pi WrblDI Google Chieme li grap bonm leal Bi A A fa Halen Zen Ewckihree Burn S Prestastep _ S a Aker Bookmarks tr s i in lee nnig a rS Zeit gie AlsiiodeTest Adaut RC py Alatiadetester ine Create New File plas File Ffo tee pop fumul a A da H vi Pand dime ul 7 E me holah WM Example 2 Firmata Blink This is only useful if the Raspberry Pi and the AlaMode can interact The Firmata library is a messaging handling protocol that takes a lot of the difficulty out of two platform development while only having to develop code on one the Pi side of the interface Firmata can also be extended on the AlaMode side of the interface to set up special message handling 1 First start the Arduino IDE pi raspberrypi usr bin arduino amp The amp in the above line backgrounds the arduino process so that you can still use the command line 2 When Arduino comes up this can take 15 20 seconds 14 Alamode User Guide r1 Open File gt Examples gt Firmata Standard Firmata Make sure your selected board is AlaMode with serial port dev ttySO B n shetch_febtoa Ardulno LAJ Dro Sketch Tools Help E Cr Sa Crii 5 San A Cori Shit 5 Lipioad iCe
6. SV_Link jumper has to be put in OFF position Note Do not connect the power supply to the power connectors if you use the FTDI for the communications with AVR ATMEGA328P microcontroller FTDI cable or USB to Serial converter will provide USB 5V power to board Once you interface and power up you will note that LED light D1 and D2 are glowing which indicates AlaMode is powered Let s test AlaMode using Simple Blink Test to get you going Open Arduino IDE If AlaMode is directly connected to Raspberry Pi through GPIO connector then e Select in Arduino menu Tools gt Board gt AlaMode Alamode User Guide r1 P dei bbi alAr ene LA Pi fd Eka db mh deze mad ser seat PA Snel Min le FAU L u Entel Por ka ma Li vl Tan wc rie uy a 7 m PaP un Tn Jenn Seda hrd a iw mi ee Pi A Li t e AZA L Zu ou e AT mean M ALL A dai AE ER Jean Vwa Ae Y A it mge Sea the Aim le ALA LO fete E DLA A AAA har Ma A AA MAA po 626 80 DLA TAIL Se A e Fes Bur es dhyn HR Yi L sl A a A A TAIL A oy MS TR EA ear hor Ps ri 75 Pa BM cj sn Aaa BIE Gi Sdt a s i TF AL HMM e Tools gt Serial Port gt dev ttyS0 Eo dd lobia rd ii lr 2dL Ehe dev FWY Pee be md ql RES T Ai pridig ta nasa Embi Hate Za mem R anye S Entel Pai ern Te E Jan Becik Alamode User Guide r1 e File gt Examples gt Basics gt Blink E Wach Ati dials 1 08 al thin Teak lik
7. e care while handling to avoid mechanical or electrical damage to printed circuit board e Do not connect or disconnect AlaMode from Raspberry Pi while connected to power supply e Please observe electrostatic discharge ESD best practice when handling Use of Fonts Normal text Arial Terminal Interaction Courier New with grey background Each line is prefixed with the command prompt pi raspberrypi which you do not Bea Alamode User Guide r1 Rear view of the board Hardware Assembly You will receive AlaMode hardware without headers installed The headers are similar to the one used in Arduino Uno R3 The headers are supplied as a kit and can be soldered if you would like to be able to use standard Arduino shields If you do not plan to use a shield a low profile can be maintained by installing right angle headers instead For experienced solderers it should take 5 10 minutes to solder the headers For beginners do not worry It will only take you a little longer about 15 minutes to solder the headers to the AlaMode PRO TIP push the headers onto the pins of an Arduino Shield before soldering This holds them perfectly aligned while you solder them in Turn the AlaMode upside down where you will find round slot i e coin type battery holder If your application requires you can maintain time information between reboots by populating the RTC backup battery CR1632 http www digikey com product deta
8. grammable directly from the Raspberry Pi GPIO no cables required The temperature controlled precision Real Time Clock RTC DS3231 with battery backup The micro SD Card reader Two way voltage level shifting for safe and accurate communication between Raspberry Pi and AlaMode The GPS interface for Fastrax UP501 module Arduino Uno compatible with standard shield header AVR ATMEGA328P microcontroller which includes the Arduino bootloader Interfaces with Raspberry Pi computer via I2C SPI or Serial UART Analog reference can be set to either 5VO or 3V3 and GND headers to allow interfacing three wires directly PON wo 9 mM Eh L 10 Servo headers with 5V0 and GND connections to allow interfacing of 3 wire servos directly 11 Servos can be powered via onboard 5V0 or from external 5V0 12 FTDI 5V0 or ISP headers for programming amp loading sketches 13 Power via external 5V0 to micro USB socket or directly from Raspberry Pi header 14 5V0 and 3V3 indicator light 15 Reset button 16 General purpose LED on digital pin 13 Alamode User Guide r1 Front view of the board Instructions for safe use Please supervise children using the AlaMode This product should be operated in a well ventilated environment This product should be placed on a stable flat non conductive surface in use and should not be contacted by conductive items During operation do not expose it to water moisture or place on a conductive surface Tak
9. il en CR1632 P036 ND 269743 This will also supply 3 3V backup to both RTC as well as GPS Now your Alamode is ready to for experimenting Note Pay attention to the polarity markings on the holder and battery 4 WER Alamode User Guide r1 Install Arduino IDE for Raspberry Pi We recommend you download either the latest version of Raspbian Wheezy from the download site of www raspberrypi org or Occidentalis which is distributed by Adafruit and is based on Raspbian Wheezy The instructions given below should work for either version These instructions assume you have your Raspberry Pi connected to the internet You will find the icon for LX Terminal on your desktop LX Terminal in Raspbian Open LXTerminal and type following commands pi raspberrypi sudo apt get update pi raspberrypi sudo apt get install arduino To make the necessary changes for the Arduino IDE to recognize AlaMode download AlaMode set up from the link given below https github com wyolum alamode raw master bundles alamode setup tar gz From the command line unpack and install it pi raspberrypi tar xvzf alamode setup tar gz pi raspberrypi cd alamode setup pi raspberrypi sudo setup The above lines will install Arduino IDE and get it ready to work with the AlaMode The standard install will work out of the box with any Arduino compatible board that has an FTDI interface but Uno s dev ttyACMO and the Raspberry Pi dev ttvAMAO are no
10. ing Run in WeblDE 16 l Kl Alamode User Guide r1 E Adsl leaning System Raspberry Pi WebiDE Google Chome D a t iplkorryallezal E Ceske ee Mit e Praha 2 HLTGLAH WN L ea Gage aa eh paling E pg mi ney pyn Caii a era Un SLED Ee SAS L E Creare Ne File Create Hern Polder a d ESCH E Fpesspsakb de v i Haat pat 7 y GerdecabbtN i pt ki F own E Servo Control The AlaMode board provides a convenient way to connect to servo motors The photo of the top of the board shows an area labeled Servo 5VO and GND This area of the board has 8 sets of three pins The first six sets are used to control servo motos the remaining 2 sets select your power option Each set of three pins has Ground 5Vdc and a PWM pin from the Arduino The pin closest to the Arduino chip is the PWM pin the pin furthest from the Arduino chip is the Ground Counting from the edge of the AlaMode the PWM pins are D3 D5 D6 D9 D10 and D11 To connect a servo you push its three wire connector onto a set of pins Be sure the orientation is correct You have two choices for 5V power to your servos This choice is made using the last two sets of three pins set 7 and 8 Rows 7 and 8 have identical function You can select servo power by using only one of the two rows and leaving the other row empty Or you can place an identical jumper in both rows to give you more current This document has an excellent photo of how this works http wyolum
11. nano etc modprobe d raspi blacklist conf Like this ue pliraspbarrypl sudo nano fetcfmodprobe d fraspi blacklist conf Add in front of two lines as shown below blacklist spi bcm2708 fblacklist i2c bcm2708 Like this Press cntrl x and press y to save it pi raspberrypi sudo nano etc modules and add i2c dev at the last line and save it Install the 12C tools pi raspberrypi sudo apt get update pi raspberrypi sudo apt get install i2c tools Then type following lines pi raspberrypi sudo i2cdetect y 0 RPi Model B revision 1 brd pi raspberrypi sudo i2cdetect y 1 RPi Model B revision 2 brd You will see from the figure below that there is a device occupying address 0x68 which is the address for RTC 0123456789abcdef 00 ne 10 20 30 40 SUE BUT IE Re ZEE len ces E ES 10 Au yy old v Alamode User Guide r1 Ka 61 tas Continuing the tutorial let s load up the RTC module by running the following command pi raspberrypi sudo modprobe rtc ds1307 The following commands need to be run as root The command sudo bash changes to the root user And exit returns you to normal user mode pi raspberrypi sudo bash
12. r 12e 0 new device for revision 1 board pi raspberrypi echo ds1307 0x68 gt EE pi raspberrypi sudo hwclock r before exit 0 and save it see the screenshot in the next page 12 Alamode User Guide r1 pt repa my on Me lat Len lipp To make this effective you need to reboot the system by running sudo reboot Now the RTC of AlaMode is added as real time clock for Raspberry Pi Examples Example 1 AlaMode Test This is the factory test we use for AlaMode It tests the Serial port I2C real time clock and SD card A side benefit is you can see both sides the Pi side and the AlaMode side of each of the ports am using the AdaFruit WeblDE to run this example This is a great way to develop on the Raspberry Pi without setting up a display Give it a try or use your favorite method 1 Download or Copy Paste the sketch AlaModeTest ino or get the raw file from bitbucket into the Arduino IDE 2 Upload the sketch to AlaMode by clicking the button with the right arrow on it G 3 Download pyserial 2 5 and install pyserial This is a super easy library that allows connections through any serial port 4 Download or Copy Paste the python AlaModeTester py file into a new file in the WebIDE 5 Run AlaModeTester py by clicking Run in WeblDE Success Mostly did not have an SD card installed in AlaMode at the time of the test The SD test is run on the AlaMode once 13 E
13. rence 19 pra TRAE DESEN Kar VAIPA UE w e i e de num b ES SC SE van ya DN li Alamode User Guide r1 DRESCH 20 AlaMode Schematic 1 et Alamode User Guide r1 O AA fal Apa pe y ADD HS D A 75 AA Tn GE Vela TI od 7 Ts Bi ur qe ELCH a AlaMode Schematic 2 21 e ark di diese ks nechst AA Ce Mon y S 59 TAF e dz RE Wy eE miss el Z BO man den Bet a Pe og ll WSA MTR 6 snt rar as Alamode User Guide r1 22 viyelum Alamode User Guide r1 AlaMode Schematic 3 23 Alamode User Guide r1 rey RSE 129 ET TI NOT MHDpaTa t s krer zt O kw 1 x f bd a lla 3 LA E HE Ss ity 2 8 Git ayo Fate Ak tan 7 ie Pieler at A fos e C H WA iv a dinr a EI ants AlaMode Schematic 4 24 Wyola Alamode User Guide r1 25
14. ri Ll Lpload Using Programmer Ctrl Sg r Ll Page Setup Ceri Shitt P r Ctl Corns Crna Standard imatr 3 Upload the sketch by clicking the button with the right arrow on it H The compiler does not run very quickly on the Raspberry Pi so this takes about a minute 15 A Alamode User Guide r1 4 Now we need to install pyFirmata on the Raspberry Pi Extract the source code to home pi tmp pi raspberrypi mkdir tmp no harm if already exists piGraspberrypi cd tmp pi raspberrypi tmp wget https bitbucker org rino pytirmata ger 3 54 4902154 zip pi raspberrypi tmp nzip 3f54748b2154 zip pi raspberrypi tmp sudo usr bin python2 7 setup py install 5 Run pyFirmataTest through the WeblDE Create New File copy paste code then click run Y A E A PREN EC LANE NEW File Uplead Fale If all went correctly an LED on your AlaMode should be blinking Hooray Today a blinky LED tomorrow the World Example 3 DS3231 Temperature Compensated Real Time Clock In this example we access the time from the DS3231 real time clock Since it is connected directly to the I2C bus we need play only with the Pi side of the house 1 Make a new directory called DS3231 by clicking Make New Folder in WebIDE 2 Download AdaFruit s easy to use 12C library into DS3231 created in step 1 3 Download WyoLum s DS3231 py into the same directory 4 Run DS3231 py by click
15. t recognized by Arduino IDE To do that we have created some udev rules that create symbolic links to those devices that are named dev tty S1 Uno and dev ttyS0 AlaMode respectively Interfacing with Raspberry Pi 8 Powering Up AlaMode comes with built in matching 26 pins female header and for direct interfacing with Raspberry Pi through GPIO pins A bit of care is required when putting the two devices together It is easy to insert just one row of pins into the socket but all of the pins need to be connected The following GPIO pins available to AlaMode are DC SPI UART GND 3V3 5 V 0 GPIO pin 1 for reset It is advised to interface both the devices without connecting to power Alamode User Guide r1 The AlaMode can be powered in three ways 1 Directly from Raspberry Pi you can put jumper on the pins labeled SV_Link to the ON position With this jumper in this position the AlaMode gets its power through the GPIO interface so you will need a power supply for the Raspberry Pi RPi that is capable of supplying a current of at least 1A 5V_Link in ON position h d Alamode User Guide r1 cd sae L a i A Fr Ze ro d 5V_Link in OFF position 2 From external source by connecting it to 5VO using micro USB port available on the other side of the board In this case the SV_Link jumper has to be put in OFF position 3 Using a 5V FTDI cable In this case the
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