Manchester pattern

[ashiq1213]

I want to generate 125Khz signal with manchester pattern. I tried using this library but couldn't find the output in CRO.

[LieBtrau]

Hi Ashiq1213, This library has been designed for Adafruit Protrinket 3V. With small modifications it should work for any ATMEGA328 board (such as Arduino Uno). Unfortunately I don't have an Uno right now, so I can't test it. If you want this code to work for Arduino Uno, you should:

• change the "#ifdef ARDUINO_AVR_PROTRINKET3" to "#ifdef ARDUINO_AVR_PROTRINKET3 || defined(ARDUINO_AVR_UNO)" (without the " s)
• The pwm output is on pin 10
• An arduino Uno works on 16MHz, a Adafruit Protrinket3V works on 12MHz. The values for OCR1A and OCR1B should be changed accordingly. OCR1A=127, OCR1B=63.

I'll try to get an Arduino Uno to make the changes and test them.

[ashiq1213]

thank you for your kind reply. I will change the code as per your guidance mean while it would be great if you too test it and give me a confident result.

Best regards, Ashiq On 28 Aug 2016 15:20, "Christoph Tack" notifications@github.com wrote:

Hi Ashiq1213, This library has been designed for Adafruit Protrinket 3V. With small modifications it should work for any ATMEGA328 board (such as Arduino Uno). Unfortunately I don't have an Uno right now, so I can't test it. If you want this code to work for Arduino Uno, you should:

• change the "#ifdef ARDUINO_AVR_PROTRINKET3" to "#ifdef ARDUINO_AVR_PROTRINKET3 || defined(ARDUINO_AVR_UNO)" (without the " s)
• The pwm output is on pin 10
• An arduino Uno works on 16MHz, a Adafruit Protrinket3V works on 12MHz. The values for OCR1A and OCR1B should be changed accordingly. OCR1A=127, OCR1B=63.

I'll try to get an Arduino Uno to make the changes and test them.

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[ashiq1213]

Hi LieBtrau, I tried the following example code. It got compiled and uploaded but i couldn't see any output in CRO. //Includes for libraries must be done in *.ino file

include "SPI.h"

//Includes needed for this file

include ''as3933gen.h''

//#include

include ''RingBuffer.h''

byte pattern[]={0x127, 0x63}; As3933Gen as(pattern);

// the setup function runs once when you press reset or power the board void setup() { pinMode(11, OUTPUT); as.begin(); }

// the loop function runs over and over again forever void loop() { // if(!as.isBusy()) // { // as.generate(a); // bitClear(PORTB,PB3); // } }

[ashiq1213]

Hi LieBtrau, could you give an example for using as3933.h library. I feel something missing in constructor of as3933.cpp file.

[LieBtrau]

Hi Ashiq, I fixed the wave form generation: as3933gen. The solution is on the task branch. The example "test2" shows you how to use it to generate a waveform. I tested it on Protrinket 3V. I have an Uno now, so I can test it on that one too if I find some time. Waveform output is on pin 10. BTW: The pattern for the AS3933 generator expects two bytes: 0x127 is already two bytes: 0x01 and 0x27. Didn't you get a compiler warning on that one?

About controlling the AS3933: I'll try to have a look at the as3933 later to see what's wrong there.

[ashiq1213]

Hi LieBtrau,

many more thanks for the necessary changes. for as3933 I gave byte pattern as (0×96,0×69). I dint get any warning from compiler.

It would be great if you give an example for as3933. On 30 Aug 2016 22:30, "Christoph Tack" notifications@github.com wrote:

Hi Ashiq, I fixed the wave form generation: as3933gen. The solution is on the task branch. The example "test2" shows you how to use it to generate a waveform. I tested it on Protrinket 3V. I have an Uno now, so I can test it on that one too if I find some time. Waveform output is on pin 10. BTW: The pattern for the AS3933 generator expects two bytes: 0x127 is already two bytes: 0x01 and 0x27. Didn't you get a compiler warning on that one?

About controlling the AS3933: I'll try to have a look at the as3933 later to see what's wrong there.

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[ashiq1213]

Hi LieBtrau, example you have given for as3933gen is working great, Cheers! In as3933 library am trying to set the correlator and write data but am getting error in scope. I feel something is missing in constructor. could you check it and add a suitable example.

[LieBtrau]

Hi Ashiq, On the " tsk_as3933_example_fix"-branch you can find the "test1"-example that compiles, but is not functional. The constructor is called with three parameters: SPI object, the SS-pin (connected to pin 1 of the AS3933), and the DAT-pin (connected to pin 15 of the AS3933). The problem is that my self-made hardware doesn't work correctly. I can only calibrate one antenna. This makes it hard to debug my code. Buying the dev kit is not an option for me, because I find it much too expensive. Later I'll try to write the antenna calibration functionality, but I can only test it with one antenna.

[ashiq1213]

Hi liebtrau,

thanks for your support. you said this example is not functional. then how do we enable the correlator of As3933. I need an example to enable the correlator. According to datasheet, we need to assign value 1 to R1<1> in order to enable correlator. how do we do that? On 31 Aug 2016 22:30, "Christoph Tack" notifications@github.com wrote:

Hi Ashiq, On the " tsk_as3933_example_fix"-branch you can find the "test1"-example that compiles, but is not functional. The constructor is called with three parameters: SPI object, the SS-pin (connected to pin 1 of the AS3933), and the DAT-pin (connected to pin 15 of the AS3933). The problem is that my self-made hardware doesn't work correctly. I can only calibrate one antenna. This makes it hard to debug my code. Buying the dev kit is not an option for me, because I find it much too expensive. Later I'll try to write the antenna calibration functionality, but I can only test it with one antenna.

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[LieBtrau]

Hi Ashiq, I'd like to know what hardware you're using for the AS3933. Could you send me your schematic? The circuit that I designed for this can be found on: 3D LF wakeup receiver.

[ashiq1213]

Hi liebtrau, I have attached the pic of the schematic. could you help me in enabling the correlator. either using your library or making a separate coding to enable it. because I have already coded to transmit data in serial mode and made microcontroller to wait for interrupt by putting microcontroller in power down mode. now I need to enable the correlator and merge that with my coding. On 1 Sep 2016 09:06, "Christoph Tack" notifications@github.com wrote:

Hi Ashiq, I'd like to know what hardware you're using for the AS3933. Could you send me your schematic? The circuit that I designed for this can be found on: 3D LF wakeup receiver https://workspace.circuitmaker.com/Projects/Details/christoph-tack-2/3D-LF-wakeup-receiver-evaluation .

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[LieBtrau]

Where is the attachment?

Anyway, before you can set the correlator, you'll first need to tune the antenna and calibrate the RC-oscillator. I'm writing that code now.

[ashiq1213]

some problem with attached pic. I have re attached now is it visible?

[ashiq1213]

Hi liebtrau, I am using the code below to transmit data in serial mode and made microcontroller to wait for interrupt by putting microcontroller in power down mode. Now i need to attach a code to enable correlator.

include <avr/sleep.h>

void setup() { // start serial port at 9600 bps: Serial.begin(9600); while (!Serial) { ; // wait for serial port to connect. Needed for native USB port only }

Serial.begin(9600); //start serial communication at 9600 baud pinMode(13,OUTPUT); // set pin 13 as an output so we can use LED to monitor digitalWrite(13,LOW); // turn pin 13 LED off pinMode(2, INPUT); //Set interrupt pin 2 as input digitalWrite(2,LOW); //activate the internal pull-up resistor to pull it high when jumper is not connected to GND establishContact(); // send a byte to establish contact until receiver responds pinMode(10, INPUT);//wake(implement pull-down resistance) pinMode(8, OUTPUT);//10-pin output pinMode(12, OUTPUT);//ss-chip select }

void loop() { // if we get a valid byte, read analog ins: //delay(5000); // Stay awake for 5 seconds, then sleep. These are the 5 seconds when we see ~40mA on the multimeter. sleepSetup(); //now we see ~27 mA until pin 2 is connected to GND digitalWrite(12, HIGH); //if (Serial.available() > 0) {

}

void establishContact() { while (Serial.available() <= 0) { //Serial.print(11010000); // send a capital A Serial.write(11010000); delay(300); Serial.write(11111111); delay(5000); sleepSetup(); //delay(300); } } void sleepSetup() { sleep_enable(); attachInterrupt(0, pinInterrupt, HIGH);//Set pin 2 as interrupt and attach Interrupt Service Routine (ISR) set_sleep_mode(SLEEP_MODE_PWR_DOWN);//define power down sleep mode digitalWrite(13,LOW); // turn LED off to indicate sleep sleep_cpu();//Set sleep enable (SE) bit, this puts the ATmega to sleep Serial.println("just woke up!");//When it wakes up due to the interrupt the program continues with the instruction following sleep_cpu() digitalWrite(13,HIGH); // turn LED on to indicate wake up }

void pinInterrupt()//ISR { sleep_disable(); detachInterrupt(0);

}

[LieBtrau]

Hi Ashiq, let's do this step by step. So that we have a strong base to build on and add extra functionality. On the task branch, I added code that tunes the LF1P antenna (the only one you're using). The tuned antenna is then used to calibrate the internal oscillator. This works on my hardware. I suggest you try it too. This code checks your SPI bus, tuning circuit and antenna connection. Once you've got that working, we can move on to the next step.

[ashiq1213]

Hi LieBtrau, am getting the following error: ''fatal error: FreqCount.h: No such file or directory,

include "FreqCount.h''

Can i add any freqcount library to this library or i should add specific library you used for freqcount

[LieBtrau]

You'll have to change your pin usage. See as3933.h. Pins 10-13 have to be used for SPI. Pin 5 is needed for the antenna calibration.

[ashiq1213]

I have done the spi connections. I am getting the about stated error ''fatal error: FreqCount.h: No such file or directory,

include "FreqCount.h''

Can i add any freqcount library to this library or i should add specific library you used for freqcount?

[LieBtrau]

FreqCount library on GitHub

[ashiq1213]

code got compiled and i saw the following result in serial monitor: ''test1: Checking AS3933 functionality Communication with AS3933 fails. Tuning antenna : LF1 Testing bit: 4 Frequency: 0 Testing bit: 3 Frequency: 0 Testing bit: 2 Frequency: 0 Testing bit: 1 Frequency: 0 Testing bit: 0 Frequency: 0 Calibration for antenna 1 fails''

[LieBtrau]

I pushed a new version on the task branch that gives more debug info when communication fails.

[ashiq1213]

code got compiled and i saw the following result in serial monitor: test1: Checking AS3933 functionality Reading data from AS3933 fails: r5: 0 r6: 0 Communication with AS3933 fails.

[ashiq1213]

while running the updated example, I removed ground between IC and Uno board. then i got values in r5andr6.

''test1: Checking AS3933 functionality Reading data from AS3933 fails: r5: FF r6: FF Communication with AS3933 fails.''

[LieBtrau]

Your AS3933 doesn't communicate at all. You should get 0X69 and 0X96 for r5 and r6.
Check all the connections again and pin voltages (3.6V MAX). If this first step doesn't work, it's no use going further.

[ashiq1213]

thank you christoph. I will try again if there is any error with pins or code any.

[ashiq1213]

If i give battery power to As3933, am getting output as r5=0,r6=0 If i give power supply to As3933 from uno board(3.3v), am getting output as r5=FF,r6=FF. I made two boards, I tried on both and getting same output. Is there any other way to enable correlator. I have planned to use As3933gen library to transmit wired signal with signal generator to the antenna connector. So i want to enable the correlator to detect the manchester pattern of the transmitting signal.

[LieBtrau]

To be able to enable the correlator, you need to be able to communicate to the AS3933. As long as you don't have that one fixed, there's nothing you can do with the AS3933. If you send me your schematic, maybe I could help you out. Remark that the IO voltages of the Arduino Uno are 5V. You'll need level translators between the Uno and the AS3933 for the SPI. If you didn't do this, you've probably fried the AS3933 already. If you use a 3V3 Arduino type (ProTrinket3V, Arduino Pro 3V, Arduino Pro Mini 3V), you don't need level shifting.

[ashiq1213]

do you want my gerber file for schematic or hand sketch. but As3933 worked in serial transmission. I made a code to serialy transmit a data from Uno to As3933. after transmitting data I put my uno in power down mode and made it wait for interrupt. once I gave interrupt from 14pin(wake) of As3933 to Uno, it woke up from power down mode. On 2 Sep 2016 08:39, "Christoph Tack" notifications@github.com wrote:

To be able to enable the correlator, you need to be able to communicate to the AS3933. As long as you don't have that one fixed, there's nothing you can do with the AS3933. If you send me your schematic, maybe I could help you out. Remark that the IO voltages of the Arduino Uno are 5V. You'll need level translators between the Uno and the AS3933 for the SPI. If you didn't do this, you've probably fried the AS3933 already. If you use a 3V3 Arduino type (ProTrinket3V, Arduino Pro 3V, Arduino Pro Mini 3V), you don't need level shifting.

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[LieBtrau]

For making the gerber file, you should have drawn a schematic first. The schematic is what I want, not the gerber file. What program are you using to do the PCB layout? Eagle, Altium?

What do you mean by "As3933 worked in serial transmission"? The AS3933 is an RX-only IC.

[ashiq1213]

PCB1 LEGEND.pdf Hi christoph, I have uploaded schematic pdf. I used EASY PC software for PCB layout.

sorry i did a wrong test. AS3933 is Receiver only.

[LieBtrau]

Ashiq, this is not a schematic. It's an assembly drawing. I need the "schematic capture" as your Easy-PC software calls it. Did you make a schematic? You mentioned a hand-sketch already. That would do if you didn't make a schematic. In case you didn't make a schematic: I strongly suggest you use schematics in the future and export them to the PCB-layout. It excludes many types of connection errors.

[ashiq1213]

Christoph, I had schematic capture but that pdf is missing. Am trying to retrieve it. thank you for your support. On 2 Sep 2016 19:13, "Christoph Tack" notifications@github.com wrote:

Ashiq, this is not a schematic. It's an assembly drawing. I need the "schematic capture" as your Easy-PC software calls it. Did you make a schematic? You mentioned a hand-sketch already. That would do if you didn't make a schematic. In case you didn't make a schematic: I strongly suggest you use schematics in the future and export them to the PCB-layout. It excludes many types of connection errors.

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[ashiq1213]

christoph, can you give me a separate code to enable correlator (R1<1>=0) without calling it from As3933 library. just to give a try, while testing if something happens then it will be great. On 2 Sep 2016 20:09, "ashiq rahman" ashiqrahmansns@gmail.com wrote:

Christoph, I had schematic capture but that pdf is missing. Am trying to retrieve it. thank you for your support. On 2 Sep 2016 19:13, "Christoph Tack" notifications@github.com wrote:

Ashiq, this is not a schematic. It's an assembly drawing. I need the "schematic capture" as your Easy-PC software calls it. Did you make a schematic? You mentioned a hand-sketch already. That would do if you didn't make a schematic. In case you didn't make a schematic: I strongly suggest you use schematics in the future and export them to the PCB-layout. It excludes many types of connection errors.

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[LieBtrau]

Don't count on it. As long as you get "Communication with AS3933 fails." it will never work. You want to run before you can walk. I'm willing to help, but you have to be reasonable.

[ashiq1213]

yes your right. I wil try to fix it. thank you so much. On 2 Sep 2016 21:36, "Christoph Tack" notifications@github.com wrote:

Don't count on it. As long as you get "Communication with AS3933 fails." it will never work. You want to run before you can walk. I'm willing to help, but you have to be reasonable.

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[LieBtrau]

Correlator has now also been implemented. If all goes well, you should see this on startup:

test1: Checking AS3933 functionality Tuning antenna : LF1 Testing bit: 4 Frequency: 127541 Testing bit: 3 Frequency: 125328 Testing bit: 2 Frequency: 124255 Testing bit: 1 Frequency: 124785 Testing bit: 0 Frequency: 125058 RC-oscillator OK Everything set up.

[ashiq1213]

thank you christoph. I will try this one. On 4 Sep 2016 12:23, "Christoph Tack" notifications@github.com wrote:

Correlator has now also been implemented. If all goes well, you should see this on startup:

test1: Checking AS3933 functionality Tuning antenna : LF1 Testing bit: 4 Frequency: 127541 Testing bit: 3 Frequency: 125328 Testing bit: 2 Frequency: 124255 Testing bit: 1 Frequency: 124785 Testing bit: 0 Frequency: 125058 RC-oscillator OK Everything set up.

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[ashiq1213]

Christoph, I just added the library to arduino and the i compiled the new example and uploaded on UNO board. I got the same output: test1: Checking AS3933 functionality Reading data from AS3933 fails: r5: 0 r6: 0 Communication with AS3933 fails. Should I make any changes in example program before i upload in UNO board.

[LieBtrau]

No, you have to make changes to your hardware. Your SPI communication doesn't work. Check all the connections again. You could also connect a logic analyzer to the SPI bus.

[ashiq1213]

I need to order an logic analyzer to check and also am trying to get an protrinket 3v. I am planning to Remake the hardware design. but in my hardware am getting output from groung pin(pin6) and supply pin(pin5). Which software you used for PCB layout? How is your hardware? what are the goals like sensitivity,power consumption,wakeup range you reached with your hardware?

[LieBtrau]

Hi Ashiq, I made the design with CircuitMaker. The designs are stored online. The design of my hardware can be found here. This design isn't perfect: see the comments.
To be honest, I stopped development on this AS3933 project. I'm using a Bluetooth Low Energy module (RN4020) now. It provides much more functionality than the AS3933, it's smaller, it can communicate with smartphones, it provides two way communication (also encrypted), the range can be adjusted by changing TX-power, no high power TX-station is needed. The power consumption is in the 10uA range if you set it up well. So it can live a few years on a coin cell. The hardware is much simpler to implement too.

[ashiq1213]

great. all the best On 4 Sep 2016 17:10, "Christoph Tack" notifications@github.com wrote:

Hi Ashiq, I made the design with CircuitMaker. The designs are stored online. The design of my hardware can be found here http://workspace.circuitmaker.com/Projects/Details/christoph-tack-2/3D-LF-wakeup-receiver-evaluation. This design isn't perfect: see the comments.

To be honest, I stopped development on this AS3933 project. I'm using a Bluetooth Low Energy module (RN4020) now. It provides much more functionality than the AS3933, it's smaller, it can communicate with smartphones, it provides two way communication (also encrypted), the range can be adjusted by changing TX-power, no high power TX-station is needed. The power consumption is in the 10uA range if you set it up well. So it can live a few years on a coin cell. The hardware is much simpler to implement too.

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[ashiq1213]

hi christoph, I have ordered for pro trinket 3v. what board you selected in tools menu to use pro trinket in arduino software? and if am using Pro trinket, which library and what examples should I use? In task branch, example test 2 why have you given pattern as 12 and 34. the required pattern is 96 and 69 right? On 4 Sep 2016 17:30, "ashiq rahman" ashiqrahmansns@gmail.com wrote:

great. all the best On 4 Sep 2016 17:10, "Christoph Tack" notifications@github.com wrote:

Hi Ashiq, I made the design with CircuitMaker. The designs are stored online. The design of my hardware can be found here http://workspace.circuitmaker.com/Projects/Details/christoph-tack-2/3D-LF-wakeup-receiver-evaluation. This design isn't perfect: see the comments.

To be honest, I stopped development on this AS3933 project. I'm using a Bluetooth Low Energy module (RN4020) now. It provides much more functionality than the AS3933, it's smaller, it can communicate with smartphones, it provides two way communication (also encrypted), the range can be adjusted by changing TX-power, no high power TX-station is needed. The power consumption is in the 10uA range if you set it up well. So it can live a few years on a coin cell. The hardware is much simpler to implement too.

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[LieBtrau]

Hi Ashiq, I'm using an FTDI cable to program the ProTrinket. Adafruit has an excellent guide about the ProTrinket. Start with a simple "blinky" or something like that. You can use example/test1 and example/test2 as is.

Example test2 and test1 both use 0x12 and 0x34. The default pattern for AS3933 is indeed 0x96 and 0x69, but the exampe/test2 overwrites it.

[ashiq1213]

thank you christoph.

On Mon, Sep 5, 2016 at 7:08 PM, Christoph Tack notifications@github.com wrote:

Hi Ashiq, I'm using an FTDI cable to program the ProTrinket. Adafruit has an excellent guide about the ProTrinket. Start with a simple "blinky" or something like that. You can use example/test1 and example/test2 as is.

Example test2 and test1 both use 0x12 and 0x34. The default pattern for AS3933 is indeed 0x96 and 0x69, but the exampe/test2 overwrites it.

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[ashiq1213]

christoph, I am trying to upload the code in Protrinket but am getting error message as "Could not find USBtiny device (0x2341/0x49)". since am using windows, I installed drivers and selected the board in tools but getting the same error. Did you face this problem?

[LieBtrau]

Hi Ashiq, we're going way out of topic here.
I'm using Ubuntu. No problems here.
If you follow this Adafruit guide it will probably solve your problem. This guide covers ProT rinket setup specifically. Be sure to install the windows driver. You could check your "Device Manager" in Windows to see if your ProTrinket3V is correctly detected.

[ashiq1213]

thank you christoph. I will try On 7 Sep 2016 20:24, "Christoph Tack" notifications@github.com wrote:

Hi Ashiq, we're going way out of topic here.

I'm using Ubuntu. No problems here.

If you follow this Adafruit guide https://cdn-learn.adafruit.com/downloads/pdf/adafruit-arduino-ide-setup.pdf it will probably solve your problem. This guide https://cdn-learn.adafruit.com/downloads/pdf/introducing-pro-trinket.pdf covers ProT rinket setup specifically. Be sure to install the windows driver. You could check your "Device Manager" in Windows to see if your ProTrinket3V is correctly detected.

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[ashiq1213]

Hi christoph, CIRCUIT - Schematic.pdf This is my schematic.

[LieBtrau]

Your schematic is strange. It looks like you've connected an AM-radio detector to your board. You'll probably want to connect a long wire on the left, where the 2pF is connected. I'm not a radio expert, but I think a magnetic loop antenna works better than a long wire for LF. You're using the AS3933 in a way that it was not designed for. There's a lot of special functionality in it, that you won't use, but you will pay for it. Is the AS3933 the right part for you?

I guess this design is your solution to solve some kind of problem. What is the initial problem? What will you use this for?