Questions tagged [atmega32u4]

atmega32u4 is low-power Atmel 8-bit AVR RISC-based microcontroller

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How to enable auto reset in Arduino Leonardo?

I am trying to program an ATMega32u4 microcontroller through arduino IDE. I have added external oscillator(16Mhz) and capacitors and few other connections according to the Schematic. I had put a ...
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110 views

Atmega 32U4 doesn't show on device manager after fuse bits reset

I am finally ready to try setting fuse bits on my ATMega32u4-AU custom board (8Mhz Ceramic Resonators, 3.3V), however, after I set the fuse bits and plug my board to computer, the device manager ...
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159 views

Bitmap only displays correctly with PROGMEM keyword

I have a bitmap to draw defined as below. PROGMEM const unsigned char ship1 [] = {0x18, 0x3C, 0x7E, 0xFF, 0x81, 0xC3}; It is then used by the arduboy library's draw slow bitmap function like so: ...
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ATMEGA32u4 Arduino Bootloader Issues

I've been struggling with this issue for a few days on and off now.  I made a custom PCB (schematic) for a smaller Arduino Pro Micro and it works - mostly.  The only issue I had was that the pins on ...
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87 views

It is possible to revive my Arduino Leonardo (mini beetle) board?

I have this board: It has the atmega32u4 chip. I have updated its code several times, and used it without issues for several months. Today, while updating (using Arduino IDE) it started to throw ...
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320 views

avrdude: initialization failed, rc=-1 on Windows but works on Linux

I am using a Deek-Robot USBTinyISP to talk to an ATMega32u4 using avrdude. When I plug the programmer into my Arch Linux box, it works immediately with no drama, but Windows refuses to talk to the ...
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28 views

Trying to install amforth on Leonardo board

Just got a Arduino Leonardo (with headers) dropped in my lap this week. I've tried experimenting with the Arduino C++ IDE and find it awkward. I have some previous experience with Forth and would like ...
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Question about controlling servos with PWM while being able to accurately read the current from a sensor

Hi I am hoping to design a custom board ATMEGA32u4 with practically a Arduino leonardo bootloader. I plan to control up to 12 servos while being able to read back the current sensor voltage of an ...
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885 views

Timer0 overflow interrupt not working

I try to use the Timer0 of an Arduino Leonardo (ATmega32u) to trigger an interrupt at regular intervals, using plain avr-gcc (not the arduino library). I try to blink the built-in LED as test, but it ...
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911 views

Can't reset Arduino Pro Micro

I'm trying to reset an Arduino Pro Micro with a new code and it is not allowing me to. I'm using an empty sketch to upload to the pro micro but I get different error messages every time. I think the ...
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79 views

Atmega32 push button library problem

I have two files, the first file is a library that I use to handle push buttons and initialize it and the second is where I handle my code and change LED state when push button is pressed, but my code ...
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44 views

Get data from a running exe on my pc

I have made a button with an LED using an arduino micro. It's connected to my pc and when I hit the button, the LED activates and a recording on Reaper (digital audio workstation) is started. When I ...
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158 views

Arduino Micro project with Bluetooth low energy

I created my project prototype with Arduino Micro and Adafruit Bluetooth low energy device. Now I need to develop the prototype to production (like a small USB device). I just need Rx, Tx, 3V pin ...