Does this interfere with SPI?

[Anonymous]

Hey Bill, thanks so much for these libraries!

 

I’m currently using a PS2 controller and arduino with a cheap RF tx along with the Easy Transfer Virtual Wire library to send integers such as stick positions and stuff to an RF rx connected to a Dagu Wild Thumper Motor controller (basically Arduino Nano Atmega 168). Everything seems to work great.

However, I also want sound out of my robot so I purchased a Rugged Audio Shield (http://ruggedcircuits.com/html/rugged_audio_shield.html) that I figured I could drive with the processing power of the motor controller. So far I can get the motor controller functionality to work with the PS2 controller coming in wirelessly with the Easy Transfer Virtual Wire method, and I can get the Rugged Audio Shield to play audio files if I load the board specifically for that, but I can’t get them to both work.

The Rugged Audio Shield uses the SPI library and I am using the ICSP pins on the motor controller board to interface with the shield. Does the ET library interfere with this functionality somehow? If I include the ET.begin(details(mydata)); line the audio shield stops working. Any ideas? Thanks so much!

////////////PS2 Input///////////////

//start the library, pass in the data details

ET.begin(details(mydata));

// Initialise the IO and ISR

vw_set_ptt_inverted(true); // Required for DR3100

vw_setup(2000); // Bits per sec

 

vw_rx_start();       // Start the receiver PLL running

randomSeed(analogRead(0));

 

 

//////////Rugged Audio Shield///////////

pinMode(SSpin, OUTPUT);

RAS.begin();

//Serial.begin(38400);

RAS.InitSD();

delay(100);

RAS.OutputEnable();

 

[Anonymous]

Also, for the life of me I can’t figure out where I changed the pins for rx and tx. I currently have the tx coming from D3 on my arduino to the radio and on the receiver I have it set up for D9 as input, but I can’t find where I set these pins!

[Bill]

My guess is you are running out of RAM. Does the code do anything else when the audio shield stops working, something to make sure the code is still running?

[Anonymous]

Oh I think I figured it out. I was running some demo code which included a do while loop checking activity of the audio shield and never breaking to accept new input packets. Thanks, I still can’t figure out where you can change the data receive pin for the easy transfer virtual wire setup. I’m currently using D9 but I can’t figure out where I set that since I can’t see it referenced anywhere. Thanks for the help

[Anonymous]

ah I was able to find a vw_set_rx_pin(7); function, however I’m not sure how the default was set.

[Anonymous]

Oh no, new issue!

Pins 5 and 6 are hardwired to an h bridge for pwm and pins 11 and 3 are hardwired to the other h bridge on the wild thumper.

Since I’ve attached a Rugged Audio Shield to the board that uses SPI which needs pin 11 for MOSI I cut the pin 11 connection and was planning on using a different pin for pwm, but ran into a problem. I can’t get pwm out of pins 9 and 10 anymore because the Easy Transfer Virtual Wire library which uses timer1, thus disabling my pwm abilities on pins 9 and 10! Is there any way to regain PWM capabilities back to pins 9 and 10? Could I maybe get virtual wire to use timer2 instead and then have 9 and 10 available for pwm and cut the connection for the pin 3 h bridge and reroute? Thanks

Pins 5 and 6: controlled by timer0
Pins 9 and 10: controlled by timer1
Pins 11 and 3: controlled by timer2

[Bill]

This is a problem with the Virtual Library itself. I would not know how to change it. I suggest contacting the writers of Virtual Wire.

[Author]

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