Thanks for getting this together. Works for me.

Hi Gordon – I’m trying to run Adafruit’s raw IR decoder sketch (it’s at http://learn.adafruit.com/ir-sensor) with a Pi, Gertboard, IR sensor connected to PD2, and remote IR controller. The sketch uses Serial.*** statements, and is supposed to open up a COM console on a PC. As I’m using the Pi, I have run your instructions for minicom, but nothing seems to happen when I point the IR controller at the the IR sensor on the breadboard. I know the IR sensor is working, because I have an LED flashing when I press a button on the IR controller. Have you any suggestions?

Hi Gordon
The sketch I want to get working is supposed to open up a window as follows:
http://learn.adafruit.com/system/assets/assets/000/000/556/medium800/sonyread.gif?1340910472
But unfortunately no window is opened up on the Pi. That’s my problem.
The sketch is reproduced below:
/* Raw IR decoder sketch!
This sketch/program uses the Arduno and a PNA4602 to
decode IR received. This can be used to make a IR receiver
(by looking for a particular code)
or transmitter (by pulsing an IR LED at ~38KHz for the
durations detected
Code is public domain, check out http://www.ladyada.net and adafruit.com
for more tutorials!
*/

// We need to use the ‘raw’ pin reading methods
// because timing is very important here and the digitalRead()
// procedure is slower!
//uint8_t IRpin = 2;
// Digital pin #2 is the same as Pin D2 see
// http://arduino.cc/en/Hacking/PinMapping168 for the ‘raw’ pin mapping
#define IRpin_PIN PIND
#define IRpin 2

// the maximum pulse we’ll listen for – 65 milliseconds is a long time
#define MAXPULSE 65000

// what our timing resolution should be, larger is better
// as its more ‘precise’ – but too large and you wont get
// accurate timing
#define RESOLUTION 20

// we will store up to 100 pulse pairs (this is -a lot-)
uint16_t pulses[100][2]; // pair is high and low pulse
uint8_t currentpulse = 0; // index for pulses we’re storing

void setup(void) {
Serial.begin(9600);
Serial.println(“Ready to decode IR!”);
}

void loop(void) {
uint16_t highpulse, lowpulse; // temporary storage timing
highpulse = lowpulse = 0; // start out with no pulse length

// while (digitalRead(IRpin)) { // this is too slow!
while (IRpin_PIN & (1 <= MAXPULSE) && (currentpulse != 0)) {
printpulses();
currentpulse=0;
return;
}
}
// we didn’t time out so lets stash the reading
pulses[currentpulse][0] = highpulse;

// same as above
while (! (IRpin_PIN & _BV(IRpin))) {
// pin is still LOW
lowpulse++;
delayMicroseconds(RESOLUTION);
if ((lowpulse >= MAXPULSE) && (currentpulse != 0)) {
printpulses();
currentpulse=0;
return;
}
}
pulses[currentpulse][1] = lowpulse;

// we read one high-low pulse successfully, continue!
currentpulse++;
}

void printpulses(void) {
Serial.println(“\n\r\n\rReceived: \n\rOFF \tON”);
for (uint8_t i = 0; i < currentpulse; i++) {
Serial.print(pulses[i][0] * RESOLUTION, DEC);
Serial.print(" usec, ");
Serial.print(pulses[i][1] * RESOLUTION, DEC);
Serial.println(" usec");
}

// print it in a 'array' format
Serial.println("int IRsignal[] = {");
Serial.println("// ON, OFF (in 10's of microseconds)");
for (uint8_t i = 0; i < currentpulse-1; i++) {
Serial.print("\t"); // tab
Serial.print(pulses[i][1] * RESOLUTION / 10, DEC);
Serial.print(", ");
Serial.print(pulses[i+1][0] * RESOLUTION / 10, DEC);
Serial.println(",");
}
Serial.print("\t"); // tab
Serial.print(pulses[currentpulse-1][1] * RESOLUTION / 10, DEC);
Serial.print(", 0};");
}
If you run this while pointing a Sony IR remote and pressing the ON button you will get the following…

Thanks Gordon – I tried the following sketch using the Arduino 1.0.1 program. I don’t know if you’re familiar with this software, but it allows a user-friendly version of C to be used. The relevant connections for programming the ATmega are made, and the sketch does upload, but it doesn’t work!! :

/*
HelloWorld
Test sketch to print “Hello World” using Gertboard & RasPi
(when using this with a Windows PC you would expect a COM
window to open and display the Serial.println string)
*/

// the setup routine:
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
printf(“Hello World”); //doesn’t do anything !
Serial.println(“Hello World”);
}

Hi,

I used your excellent guide about month ago to get my gertboard and ATmega running straight away. I have since been testing and running a number of sketches with no issue until today when I start getting verification errors on upload and I am stumped.

avrdude: verification error, first mismatch at byte 0×0002
0x52 != 0×40
avrdude: verification error; content mismatch

It first happened when I attempted to upload a sketch with some slight modifications to one that was currently running on the ATMega and runing with no issue. I have since checked all the connections and removed connections not required for upload but still no joy.

What else can I try and is it possible that the ATMega is blown?

Thanks in advance,

Clive

Hi Gordon,
have just purchased the Pre-Assembled Gertboard and having fun with that. I have done some Arduino programming before so was excited to try with the built in chip. With your excellent site I managed to get it up and running without too much trouble, so thank you.

Everything seems fine so far except …. The delay(1000) is giving me a 10 second delay (or there abouts) not 1 second. I checked the boards.txt file and the clock seems to be OK 12000000L.

Any other thoughts?

at the moment I just changed the sketch to be delay(100) but I’d rather know what I was doing wrong.

Thanks again

Colin.

Gordon,

First off, thanks for all the hard work on this! Much appreciated. 😀

Now, for my question… I’m having an issue compiling a program with this setup. I’ve got a cheap OLED module here, which came with an Arduino library: http://www.digole.com/images/file/Tech_Data/DigoleSerial.zip

The GraphicLCDAdapterDemo compiles just fine on my Mac with 1.0.4, but I can’t get it to compile with the Linux IDE on my RPi. It doesn’t seem to want to accept prog_uchar as a valid type. (GraphicLCDAdapterDemo.cpp:23:1 error: ‘prog_uchar’ does not name a type)

I’m thinking it might be a compatibility issue with the version of avr-libc or one of the other libs. Any ideas?

Thanks,
Timothy

Can you try uploading the following Arduino sketch code in the Raspberry Pi Arduino IDE and observe the compile erros that I am experiencing. The same code compiles without error on the PC version of the Arduino IDE. The two SoftwareSerial examples will not compile either.

#include

SoftwareSerial BTSerial(10, 11); // RX | TX

void setup()
{
pinMode(9, OUTPUT); // this pin will pull the HC-05 pin 34 (key pin) HIGH to switch module to AT mode
digitalWrite(9, HIGH);
Serial.begin(9600);
Serial.println(“Enter AT commands:”);
BTSerial.begin(38400); // HC-05 default speed in AT command more
}

void loop()
{

// Keep reading from HC-05 and send to Arduino Serial Monitor
if (BTSerial.available())
Serial.write(BTSerial.read());

// Keep reading from Arduino Serial Monitor and send to HC-05
if (Serial.available())
BTSerial.write(Serial.read());
}

Kind regards

Neil

I am trying to access the serial monitor with Gertboard/Pi combination and to write to the monitor but I get a COM1 error and suggestion that I look in Arduino IDE Tools/Serial Port menu but is is grayed out. How can I get access to the Serial Port menu item please? Regards