Summary of USBASP Bootloading a ATMega328p with a 8mhZ internal clock
This article explains how to program an ATMega328P microcontroller without using an external crystal oscillator, leveraging the 8MHz internal clock instead. Using a USBASP programmer and the Arduino IDE simplifies the hardware setup by reducing components and helps beginners transition towards more advanced programming methods like WINAVR. The process involves connecting the 6-pin ISP header properly and ensuring the correct board files are installed in the Arduino IDE for the "ATMEGA 328 on a breadboard (8MHz internal clock)" option.
Parts used in the USBASP Bootloading a ATMega328p with 8MHz internal clock:
- ATMega328P microcontroller
- USBASP programmer (clone or original)
- 6-pin ISP header connector
- Breadboard or AVR target board
- Arduino IDE software
What are we going to do is program an ATMega328P without an external crystal by using USBASP programmer and the Arduino IDE.
Why would we want this? It uses less components and gets up closer to knowing how to program with something like WINAVR and because programming is fun an addicting. Not everything runs on Arduino, but it is a great place to start.
I use an USBASP clone programmer from my local electronics store. I have read this same procedure can be done on and Arduino board, but i have not been unsuccessful at making that work.
Step 1: Connections
If you follow the ISP Header 6-pin and connect the
MISO to the MISO on the chip
SCK to SCK on the chip.
You get the idea.
You could do all this on a breadboard or you could use the avr target board fournd here.
Additionally you can get some good help here
The 6-Pin header is on the USBASP.
Step 2: Board Files
Even if you do have the ” ATMEGA 328 on a breadboard (8MHz internal clock) ” showing but it is not working then you need to install my files.
The only difference is the last line. atmega328bb.build.variant=arduino:standard
Board.txt735 bytes
Board files.rar362 bytes