Questions tagged [atmega]
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23 questions
0 votes
0 answers
74 views
ASync Timer2 based OSCCAL value
How to calibrate the internal RC oscillator off of a 32768 Hz crystal serving Timer2? void OSCCAL_calibrate(void) //This version specific to ATmegaXX8 (tested with ATmega328) { unsigned char ...
- 136
0 votes
1 answer
269 views
Questions about ATMega8A including burning my hex files
I wrote a small blink program for an ATMega8U-DIP I bought recently. The source is this, #ifndef F_CPU #define F_CPU 16000000 #endif #include <avr/io.h> #include <util/delay.h> int main(...
- 121
0 votes
2 answers
83 views
I need help with code with two IR sensors using ATMega16
I'm working on a ball-counting project using two IR sensors to detect balls entering and exiting a room, but I'm currently stuck. I need help refining the logic in my while loop. Here's how I want it ...
- 11
1 vote
0 answers
42 views
Mirroring PWM input on a pin + Motor Encoder
I am interested in hooking up a nano to an RC receiver. I want the nano to mirror the PWM input and output on another pin when a specific command is given via serial. I also want to send the received ...
- 161
1 vote
1 answer
376 views
How to write single binary code to output pin
I am relatively new to arduino and coding in general and im just looking for a code to write a single string of binary code e.g.; "01000111101" To a specified output pin instead of copying ...
- 21
2 votes
1 answer
284 views
How does the compiler/assembler work wrt bootloader?
I realized that on the atmega boards the bootloader is programmed into the chip. I'm curious, when compiling a sketch how does the compiler/assembler differ from compiling a standard C program for a ...
- 161
0 votes
1 answer
235 views
Error while burning bootloader onto ATMega-8A using Arduino Mega 2560: avrdude: invalid byte value
So, I'm trying to burn the bootloader onto an ATMega 8A with an Arduino Mega 2560 as ISP. I made the necessary connections, and got this error: C:\Program Files (x86)\Arduino\hardware/tools/avr/bin/...
- 13
0 votes
1 answer
137 views
Will the atmega8-U2 work with Arduino IDE
I use a homemade board that hosts a PIC16F1829 and an ATmega328P on the same board. We use the ATmega328P with the Arduino IDE and the PIC with the MPLABX IDE for about 100 EE students a semester at ...
1 vote
2 answers
115 views
Can we use more than one timer when programming an Atmega32/16?
I tried to do a simple program using the ATmega16 microcontroller, the program is to toggle two LEDs the first one by using timer0 interrupt and the other using timer2 interrupt.
1 vote
1 answer
442 views
Can't burn fuse bits on ATMega168 with Arduino Uno as ISP
I have an ATMega168 that I am programming via my Arduino Uno as ISP. I can burn the bootloader and transfer a hex file just fine, but I can't seem to be able to change the fuse bits. I found a lot of ...
- 31
1 vote
0 answers
1k views
I2C / TWI: set up atmega328p as slave
I try to run an atmega328p as a i2c slave. even with the bare minimum the slave acts as its not wired at all: NACK is transmitted after request (see logic analyzer). The master should read a constant ...
- 21
0 votes
2 answers
1k views
Where is the Arduino IDE boards.txt file for Nano Every located?
My Arduino Nano Every runs at 16Mhz (but the 4809 can support internal 20Mhz). I know it may be possible to alter the boards.txt file and set it to build for 20Mhz. However, I can't find the boards....
- 442
2 votes
1 answer
1k views
ATMega4809 via Nano Every marked as 20Mhz, but does this confirm it is actually at 16Mhz?
If you go to the official Arduino Nano Every page and click the Tech Specs tab, you'll see that it lists it as running at 20Mhz. Turn On Verbose Compile However, if you go into the Arduino IDE and go ...
- 442
0 votes
1 answer
75 views
Is it possible to use the same power source for the arduino and a high current
I've need to control some leds which draw 300mA with an arduino (actually an atmega) and after some searching I think the following is the circuit I need, but I'm not really sure if the power source ...
- 9
1 vote
1 answer
812 views
Arduino Nano Every I2C PORTMUX
Arduino Nano Every schematic informs us that we can use ATMega4809's pins PF03 and PF02 to communicate via I2C. ATMega4809 manual says in page 19 that in order to use those pins as I2C we need to use ...
- 209