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spirilis

[Energia Library] Nordic nRF24L01+ library

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Small addition- A private state variable 'readpending' has been implemented that is set in _maintenanceHook() and not cleared until read().  This allows persistent testing of .available(1) for more freedom in your coding.

 

An example of a scenario this would fix:

while ( (millis()-saved_time) < 5000 && !nrf.available(1) )  // Two different tests
  ;
// Ambiguity here--Which condition broke the while() loop?

// This will always fail because if nrf.available(1) succeeded up above, the internal
// _maintenanceHook() call will have cleared the IRQ and nrf.available(1) checks that.
// Can use .available(0) instead.
if (nrf.available(1)) {
  .... read packet and handle ...
}

 

Now that scenario could be handled by just testing if the millis() condition was the one that broke it, but what if both conditions occurred simultaneously?  It's tricky.  Then the user would have to remember to use .available(0) in the 2nd instance instead of .available(1).  Adding extra SPI I/O imo.

 

With this "readpending" variable added, the 2nd nrf.available(1) will succeed since _maintenanceHook() from the "!nrf.available(1)" condition in the while() loop will have set readpending=1 once it discovered an IRQ was raised and went to clear it.  Further executions of nrf.available(1) will continue to report TRUE until nrf.read() is finally executed.

 

This does not affect the behavior of nrf.available(0) at all.  nrf.available(0) goes out over SPI and asks the transceiver if its RX buffers are empty to determine whether there is data pending or not.  It's more thorough.

 

Note that if an error packet (size=0 or >32) was found during the _maintenanceHook() execution, readpending is forcibly set to 0 (because a FLUSH_RX command is required to clear the error packet, throwing out everything in the RX queues).

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The main thing I'd offer is that 2.4GHz is a warzone of noise, and some channels are likely to be noisier than others so you may find some nodes don't work so well.  I'd recommend using the 5-byte RF addresses and stick with one channel--my example channel scanner (in the library) could help you find one that's very quiet.

 

Also with long distances, I recommend using 250Kbps data rate as it's substantially more reliable over distance.  Only downside is under the hood it won't perform auto-ACK.

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I a super green noob and i can do a lot of the basics but I am stuck on how to the following.  I want to have a wireless motion trigger the following code is what I use for taking pics with a wired motion trigger but I am not sure how or what would be the next step to making it wireless.  Any help would be appreciated I have a set of the 

nRF24L01 to use for this.  I ultimately want use the wireless msp430s but I thought I would try first with this.  
/**********************
 * Motion Activated Camera
 * Dan Bridges 2009
 * 
 * For schematics and more documentation see:
 * http://www.dayofthenewdan.com/projects/motion-camera
 **********************/


boolean focus = false;

int shutterPin = 2;
int focusPin = 3;
int PIRPin = 4;

int shutterPressDelay = 200;
int focusPressDelay = 200;
int interPictureDelay = 500;


void setup(){
  pinMode(shutterPin, OUTPUT);
  pinMode(focusPin, OUTPUT);
}

void loop(){
  if (digitalRead(PIRPin)) {
    takePicture();
    delay(interPictureDelay);
  }
}

void takePicture() {
  //If you want the camera to focus first set
  //the focus variable to true.
  if (focus) {
    digitalWrite(focusPin, HIGH);
    delay(focusPressDelay);
    digitalWrite(focusPin, LOW);
    delay(250);
  }
  digitalWrite(shutterPin, HIGH);
  delay(shutterPressDelay);
  digitalWrite(shutterPin, LOW);
}

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Ok, hello again...

So after rereading this topic, I patched Energia and got the correct resulst in the TX, RX and scan examples

 

[...]

 

So this is really related to the Energia problem, I have to improve my github skills...

I will go on and try receive/transmit examples on 2 launchpad soon.

Sorry for disturbing you with this.

 

Hi!

I'm having the same issues with the TX and RX examples... what i've to do to patch Energia?

 

Thank you,

V.

 

EDIT: After few hours of sleep i've successfully patched Energia and now the TX/RX demo is working! :D Thanks again!

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good day guys,

 

I'm totally new to Energia. This is my requirement.

 

I have a stellaris launchpad LM4F120 and a MSP430 launchpad for 2553. I need to establish a simple communication link between these two using NRF24L01 transceivers.

 

I downloaded energia. Then I downloaded the files "spirilis" linked in this post. I copied Enrf24.h, Enrf24.cpp and nRF24L01.h to Enrf24_RXdemo folder. Then I opened the .ino file through energia. But when I verify it through energia I got the following error messages. Please help me through.

 

 

Enrf24.cpp: In member function 'void Enrf24::begin(uint32_t, uint8_t)':
Enrf24.cpp:65:27: error: 'BIT2' was not declared in this scope
Enrf24.cpp: In member function 'void Enrf24::_maintenanceHook()':
Enrf24.cpp:239:41: error: 'BIT1' was not declared in this scope
Enrf24.cpp: In member function 'boolean Enrf24::available(boolean)':
Enrf24.cpp:277:39: error: 'BIT0' was not declared in this scope
Enrf24.cpp: In member function 'size_t Enrf24::read(void*, uint8_t)':
Enrf24.cpp:293:37: error: 'BIT0' was not declared in this scope
Enrf24.cpp: In member function 'void Enrf24::flush()':
Enrf24.cpp:316:13: error: 'BIT5' was not declared in this scope
Enrf24.cpp:322:13: error: 'BIT6' was not declared in this scope
Enrf24.cpp:337:16: error: 'BIT1' was not declared in this scope
Enrf24.cpp:338:49: error: 'BIT3' was not declared in this scope
Enrf24.cpp:338:49: error: 'BIT2' was not declared in this scope
Enrf24.cpp:341:13: error: 'BIT0' was not declared in this scope
Enrf24.cpp:344:49: error: 'BIT3' was not declared in this scope
Enrf24.cpp:344:49: error: 'BIT2' was not declared in this scope
Enrf24.cpp:344:75: error: 'BIT1' was not declared in this scope
Enrf24.cpp: In member function 'uint8_t Enrf24::radioState()':
Enrf24.cpp:396:16: error: 'BIT1' was not declared in this scope
Enrf24.cpp:400:13: error: 'BIT0' was not declared in this scope
Enrf24.cpp:407:36: error: 'BIT4' was not declared in this scope
Enrf24.cpp: In member function 'void Enrf24::deepsleep()':
Enrf24.cpp:417:14: error: 'BIT1' was not declared in this scope
Enrf24.cpp:417:28: error: 'BIT0' was not declared in this scope
Enrf24.cpp:418:49: error: 'BIT3' was not declared in this scope
Enrf24.cpp:418:49: error: 'BIT2' was not declared in this scope
Enrf24.cpp: In member function 'void Enrf24::enableRX()':
Enrf24.cpp:428:47: error: 'BIT3' was not declared in this scope
Enrf24.cpp:428:47: error: 'BIT2' was not declared in this scope
Enrf24.cpp:428:73: error: 'BIT1' was not declared in this scope
Enrf24.cpp:428:87: error: 'BIT0' was not declared in this scope
Enrf24.cpp: In member function 'void Enrf24::disableRX()':
Enrf24.cpp:443:13: error: 'BIT1' was not declared in this scope
Enrf24.cpp:446:49: error: 'BIT3' was not declared in this scope
Enrf24.cpp:446:49: error: 'BIT2' was not declared in this scope
Enrf24.cpp:448:49: error: 'BIT3' was not declared in this scope
Enrf24.cpp:448:49: error: 'BIT2' was not declared in this scope
Enrf24.cpp: In member function 'void Enrf24::setCRC(boolean, boolean)':
Enrf24.cpp:509:16: error: 'BIT3' was not declared in this scope
Enrf24.cpp:511:16: error: 'BIT2' was not declared in this scope

 

Thank you in advance.

 

 

EDIT::: Sorry for the dumb question. I figured it out. :D

Edited by Pradeepa

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Hi. Just red the whole 3 pages but it is not really clear how to patch energia... Can someone explain it as simply as it can be? Another question: What is the range approximetly on the modules (without the amp) on 1Mbps and 250Kbps?

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Good day,


 


I want to connect my Stellaris launchpad and the MSP430 2553 using NRF24L01 transceivers. I found following energia libraries,


 


For MSP430


 


http://forum.43oh.co...f24l01-library/


 


For Stelaris launchpad


 


http://forum.stellar...f24l01-library/


 


 


After that I connected the pins of the modules like below,


 


MSP430


 


CE >> P2.0


CSN >> P2.1


SCK >> P1.5


MOSI >> P1.7


MISO >> P1.6


 


Stellaris launchpad


 


 


CE >> PA6


CSN >> PA7


SCK >> PB4


MOSI >> PB7


MISO >> PB6


 


Then i used putty to check whether the transmission is happening. But I think it is not. 


 


MSP430 serial interface gives my this result,


 


 


Enrf24 radio transceiver status: Receive Mode

Received packet:

Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT

Received packet:

Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT

Received packet:

Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT

Received packet:

Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT

Received packet:

Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT

Received packet:

Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT

Received packet:

Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT

Received packet:

Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT

Received packet:

Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT

Received packet:

Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT

Received packet:

Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT

Received packet:

Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT

Received packet:

Enrf24 radio transceiver status: Receive Mode

Received packet:

 

Stellaris launchpad gives me following result


 


 


Timeout on response from server!

Finished sending

 

I'm not sure whether I am doing this correctly. Can someone please help me through. 

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Good day,

 

I want to connect my Stellaris launchpad and the MSP430 2553 using NRF24L01 transceivers. I found following energia libraries,

 

For MSP430

 

http://forum.43oh.co...f24l01-library/

 

For Stelaris launchpad

 

http://forum.stellar...f24l01-library/

 

 

After that I connected the pins of the modules like below,

 

MSP430

 

CE >> P2.0

CSN >> P2.1

SCK >> P1.5

MOSI >> P1.7

MISO >> P1.6

 

Stellaris launchpad

 

 

CE >> PA6

CSN >> PA7

SCK >> PB4

MOSI >> PB7

MISO >> PB6

 

Then i used putty to check whether the transmission is happening. But I think it is not. 

 

MSP430 serial interface gives my this result,

 

 

Enrf24 radio transceiver status: Receive Mode
Received packet:
Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT
Received packet:
Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT
Received packet:
Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT
Received packet:
Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT
Received packet:
Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT
Received packet:
Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT
Received packet:
Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT
Received packet:
Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT
Received packet:
Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT
Received packet:
Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT
Received packet:
Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT
Received packet:
Enrf24 radio transceiver status: NO TRANSCEIVER PRESENT
Received packet:
Enrf24 radio transceiver status: Receive Mode
Received packet:
 

Stellaris launchpad gives me following result

 

 

Timeout on response from server!
Finished sending
 

I'm not sure whether I am doing this correctly. Can someone please help me through. 

 

Something sounds awful flaky on the MSP430 side.  It shouldn't shift from "Receive Mode" to "NO TRANSCEIVER PRESENT".  Maybe check the wires and make sure they're not intermittently disconnecting or frayed?

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Hi. Just red the whole 3 pages but it is not really clear how to patch energia... Can someone explain it as simply as it can be? Another question: What is the range approximetly on the modules (without the amp) on 1Mbps and 250Kbps?

Geodave in another post mentioned about 40-50ft through 3 walls and I'm pretty sure that's with 250Kbps.  1Mbps is a lot less than that.  I get about ~40ft through 3 or 4 walls with possibly some room to work with.  That same setup does not work at all with 1Mbps.

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