Questions tagged [atmega328]
The ATMega328 is the chip that is the heart of the Arduino Uno. It is popular also as a chip to use to create your own board. Since it is available in the through hole version, it can be placed on a breadboard easily for circuits.
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Using Arduino UNO as FTDI
so , just bought some pre-bootloaded ATmega328(p/pu) to which I need to upload sketches on a breadboard using uno TX and RX pin as FTDI
Here is what I am to do.
I connected Uno GND and Reset .
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Is it possible to upload and run code from EEPROM during boot time?
I am having problems while writing custom bootloader, so that it uploads code from EEPROM (for now internal, as I have no external memory in my hands) and writes into flash. After ~2 weeks of ...
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Can the atmega328 return remainder during integer division?
When I write code like this:
int a = 7
int b = 2
int c = a/b
int r = a%b
Does the chip use the remainder while calculating c or does it redo the entire calculation?
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Measuring li-ion that arduino is running from
I am using a 5v Arduino pro mini (with regulator and power led removed).
I have been reading how to accurately measure Li-ion batteries when powering from the same battery you are trying to measure ...
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DIY Arduino with USB port
I am planing on making Arduino from scratch. I found many examples on internet, but they all need another Arduino for programming. How can I make Arduino with USB interface for programming and serial ...
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How can I program my self made Arduino board using USB to TTL converter?
Recently I got a coupon for JLCPCB which was 100% discount so, I designed my 10 Arduino board specially for my needs and ordered it from JLC PCB. The schematic of the board is given. At the time ...
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How to burn the bootloader and upload sketches on ATmega328P U (specifically this model)?
Recently I started to learn embedded electronics and C/C++ and for a couple of days I tried and I am still trying to burn a new ATMega328P U bought from Aliexpress. From what I know new ATMega328P's ...
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ATMega328 functions, but will not output to any pins
Problem:
ATMega328 Refuses to digitalWrite() to any pins, I can upload and run sketches using the board UNO from the ide on the 328 and can confirm it is working using the serial monitor (see code).
I ...
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How to upload a sketch to an atmega328 via FTDI FT232RL UART and Arduino IDE?
I have a sparkfun AVR Pocket Programmer and have burned the bootloader and uploaded programs using "upload using programmer" via USBtinyISP. It works fantastic.
I have a sparkfun FTDI Basic (...
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Arduino Wont Run Program at 4 Mhz
I want my Arduino Nano to consume as little power as possible, so I have been lowering the clock frequency with CLKPR from the default 16 MhZ speed. I successfully ran the program at 8 Mhz by setting ...
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Atmega328 and 4Digit 7 Segment ghost blinking!
I hooked up 4 7Seg leds (CC) with NPN transistors on the cathode of each digit. I am using 74HC595 shift register connected in the circuit in a pretty common fashion. The code I am running is the ...
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Is it possible to detach an interrupt for a certain ammount of time
Hardware: Arduino Uno
Software Version: 1.8.13
My sketch has an interrupt service routine that triggers with the rising edge of digital pin 2.
What I want to do now is detaching the interrupt as soon ...
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How to convert my Arduino setup to a PIC setup?
I have an arduino setup with LCD, RTC, EEPROM, Reed Switch, AC/DC Buck Converter, 4X4 Keypad.
What PIC IC will let me connect with all these(40 Pins), and yet accept Arduino Code.
I don't want to ...
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Using different processors when it comes to arduino
I decided to learn Arduino in this quarantine so I am still a newbie when it comes to micro controllers. Basically I been doing all my projects based on the ATMEGA328P-PU:
I even converted my ...
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Weird effect of AVR C on USB-serial communication
I recently decided to learn direct port manipulation instead of builtin arduino routines.
First I tried this piece of code
void setup() {
pinMode(13, OUTPUT);
Serial.begin(9600);
}
void loop() {
...
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Ardutester Millenium I2c Lcd Not Showing Anything!
Hiii Friends....,
I am Trying to Build Components tester Using Arduino Specifically Atmega328p Chip .
I Downloaded The Ardutester Millenium Code From Here .. https://create.arduino.cc/projecthub/...
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Jumping to bootloader from application code in atmega328p
I'm trying to program an Arduino Uno (atmega328p) using only the serial Tx/Rx lines (no DTR, so no automatic reset). This is so I can upload code via WiFi/TCP using an ESP-01.
To achieve this, I need ...
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WS2812B are only white on custom board
I recently designed a board for an LED project. I am using WS2812B as the LED, and an ATMEGA328P-AU as the microcontroller. I also am using an arduino nano as my ISP and using "flash with ...
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How can I burn the bootloader onto atmega328 (not atmega328p)?
Hi I bought some atmega328 chips (not to be confused with atmega328p). They are very similar but the atmega328p chips are just more power efficient, so I've read. Anyways, my goal is to burn the ...
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How to use Atmega328p-PU from an Uno, on a breadboard without a crystal
How do you use Atmega328p-PU from an Uno, on a breadboard without a crystal?
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Junk values in EEPROM. while writing large values
Facing an issue while writing a large value (like 2000-5000) to EEPROM using EEPROM.put().
For example, While writing 2000 values to address 5 of EEPROM. Some junk values are written automatically to ...
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Error while inputting EEPROM.read() and EEPROM.write()
I am trying to store data in ATmega328 (Arduino Uno) using the following code using tinkercad:
#include <EEPROM.h>
void setup() {
int addr, data=1;
Serial.begin(9600);
for (addr=0; addr&...
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Warm Atmega328p and weird power behaviour
I recently built a circuit with an atmega328p (which I have never used before standalone) and attached all the neccessary components (crystal, capacitors etc). However, when I powered it up with a ...
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Why am I only seeing 1.3V on an analog pin that has been set to high using digitalWrite?
I have run into a bit of trouble with a sewable electronics project. I am trying to power a SparkFun 7-Segment Serial Display from one of the analog ports of a ATmega328 board. I realize this is ...
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Atmega 328pu as stand alone
I am used atmega 328pu as stand alone.i used 7805 as regulator.
I regulated from 12 VOLT 2 amp smps.
When I connect my dc 12 VOLT pump in between 12 VOLT and ground dc motor working fine but Atmega ...
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Arduino UARTS Auto addressing slaves
i'm using this serial topology to connect my Act ATmega328p (Arduino) slaves together to a master ESP32.
They are in total 10 ATmega328p slaves and one master:
With this type of wiring i'm sure that ...
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How to run atmega328p at 8, 4 and 1 mhz?
Instead of using the regular Arduino board I have purchased the atmega328p-pu along with this components:
22pf ceramic capacitor
10K resistor
16mhz crystal
47uF capacitor
3.3 Volts Power supply
The ...
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How do I use a SMD crystal with 4 pins?
I am running my arduino project with the atmega328 chip like this:
I have purchased by mistake this crystal:
The reason why I purchased by mistake that crystal was because it has this description:
...
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Placing decoupling capacitors when building an Arduino PCB with Atmega328-PU
I have previously asked this question:
Custom build of arduino on a pcb
And thanks to the answer by Majenco I have learned that my circuit works a lot better when adding a capacitor. For example I ...
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Serial printing from flash memory (F() macro, PROGMEM, sprintf_P, SPTR)
I have been testing various techniques on an Arduino Uno for serial printing from flash memory instead of RAM. At the same time, I have been using the freeMemory() function from Adafruit.
I created a ...
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Atmega Millis with Quartz crystal
I followed https://www.arduino.cc/en/Tutorial/ArduinoToBreadboard this tutorial to program my Atmega 328p to run on a breadboard with a 16 MHZ Quarz crystal and two 22pF capacitor.
I want to program a ...
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generating signal of 3 phase UPS PWM by SVM
Is there a realization code for 3-phase UPS inverter by Arduino? I need implementation for SVM by voltage and current feedback.
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Bootloader onto an ATmega328p (3.3V/8MHz), the dude won't finish his business
Hi and thank you reading my question !
I need for my projects to design as small as i can. Both the skills, and the hardware counts. So i can't use a DIP package for them, and i have gone for a TQFP ...
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Can i exchange my arduino nano for an atmega328p-pu in my project?
Im currently trying to make a smart light switcher that is attached in front of my rooms light switches. It basically mostly consists of two servos (to turn on or off either switch), two button (to ...
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How to load scal factor external to the code?
We know that, we need calibration factors (scale factors) to read current sensor data (ACS758) to arduino. I am also using voltage reader using voltage divider circuit for my project. I need to build ...
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Start VL53l0X measurement failed
The initialization of the ToF fails with this code. I'm trying to frankenstein it with Radiohead RFM69, so far no luck.
// rf69_reliable_datagram_client.pde
// -*- mode: C++ -*-
// Example sketch ...
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Possibly fried a new atmega328p?
I have a new atmega328p IC that I wanted to program. To do so I placed it into the socket of an arduino uno. I accidentally placed it the wrong way around (180° rotated), and powered it via USB and ...
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Analog Comparator works on Nano, but not working on Pro Mini 3.3v
I've coded an analog comparator to work on Nano, but the same code does not work on a brand new Pro Mini 3.3v 8MHz. The serial monitor just outputs the triggered interrupt continuously. Lines orange ...
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Using PortB as a sink, not working
Out of ideas here, i try using PB0-3 as sinks for a LED matrix and the pins just won't sink.
My test code:
void setup() {
//bitClear(SPCR, 6);
pinMode(PD5, OUTPUT);
pinMode(PB0, OUTPUT);
...
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Replacing large lookup table with switch statement
My arduino needs to take a 14-bit number and convert it to a 10-bit number. Can't use a formula for it since the data is quite random. So I created a lookup table with 2^14 elements, each containing a ...
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Is it possible to connect a 36 pin 4 digit 7 segment display on an Arduino Uno R3?
First of all,here's the datasheet of the 4 digit 7 segment display that I'm using:
http://www.kingbrightusa.com/images/catalog/SPEC/ca56-11ewa.pdf
How can I make a counter or a clock out of this ...
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Keep 5V on while sleep with LowPower library [closed]
Is it possible to keep the 5V on, while putting the Arduino (ATMEGA328P) in sleep more, using LowPower library?
I'm trying to use this HAT:
https://spellfoundry.com/product/sleepy-pi-2-usb-c/
to ...
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Atmega328 standalone not working unless Pin1 connected to Arduino RESET
I'm new into this domain field. My principal occupation is as a .NET developer.
I'm trying to do a personal project in which a AtMega328 takes some output from a scale using HX711 and sends a SMS via ...
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What to do with Arduino floating pins?
I have some unused pins, should I connect them together and to the ground or leave them floating?
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Can we burn Arduino bootloader into any microcontroller chip?
I am new to this Arduino community
I noticed on youtube that while the prototype is complete people purchase new ATmega328p chips and flash bootloaders into them using in-system-programmers so that ...
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ATmega328P-PU blink example not working
I moved from an Arduino to a bare ATmega328P-PU (to save energy). First I wanted to start a blink-script to verify that it's all working. For this I flashed the bootloader and uploaded the blink-...
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Problem with counting inside INT0 ISR while in PowerDown
The issue that I have is in INT0 service in which it doesn't perform properly when MCU is set in PowerDown mode. I declared a global variable as "counter" and put it inside INT0 ISR but its value ...
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What is the correct way to interpret the built-in Analog-to-Digital Converter output?
When using the built-in analog to digital converter of the Arduino Uno Rev 3's Atmega328P with a reference voltage of 5V, what is the appropriate function to interpret the output? There is conflicting ...
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Bootloader difference between Atmel328p(through hole) and Atmel328p au(smd)
It’s been bugging me lot that Can’t we burn the same bootloader for both 328p and 328p au?
I got confused when I see this linksmd 328p au bootloader burn.
Will there be any impact on performance or ...
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NRF24L01 based project freezes for no good reason
I have built and coded a low power NRF24L01 transmitter and receiver, for purposes of transmitting the temperature of the transmitter's environment. I have used an Atmega328P chip for the project. The ...
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