Programming ATtiny85 from Arduino Nano - The Upload
In the previous post in this series, we went through the porting process and adapted Blink.ino to be able to run on ATtiny85. In this post, the apdated Blink.ino is uploaded to the ATtiny85.
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Upload
Now we have prepared the Blink.ino sketch for ATtiny85, it is time to upload it to the ATtiny85 chip.
Open Arduino GUI
If you don't have the Arduino GUI open any more, start it first.
Open New Sketch
Open a new sketch. Select:
File -> New Sketch
Use Adapted Blink.ino
Copy/Paste the adapted Blink.ino that uses pin 3 in the new sketch. There is no need to save it.
#define LED_PIN 3
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_PIN, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(LED_PIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(LED_PIN, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
Verify Settings
Make sure you have the same settings that you used for burning the bootloader.
Upload Using Programmer
Instead of using the normal Upload button, you now have to select:
Sketch -> Upload Using Programmer
The output window of the Arduino IDE will show you details of the compilation and upload process and if all goes well, ends with:
avrdude: erasing chip avrdude: reading input file "C:\Users\xxxxxxxx\AppData\Local\Temp\arduino-sketch-50B9D151E34A20A45A3B89D655F813D5/sketch_dec31a.ino.hex" avrdude: writing flash (682 bytes): Writing | ################################################## | 100% 1.02s avrdude: 682 bytes of flash written avrdude done. Thank you.
The adapted Blink.ino is now uploaded onto the ATtiny85. In the next post it is put to the test.