arduino:arduino_without_a_bootloader
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arduino:arduino_without_a_bootloader [2020/01/04 02:46] – [Getting your bootloader back] mithat | arduino:arduino_without_a_bootloader [2021/04/22 00:40] – [Cursed is the bootloader] mithat | ||
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One of the things that simplifies Arduino development is its [[https:// | One of the things that simplifies Arduino development is its [[https:// | ||
- | In the case of the Arduino, the bootloader | + | In the case of the Arduino, the bootloader |
- | But a bootloader isn't the only way to program the microcontrollers on these boards. Instead, you can use an external programming device (a.k.a, // | + | But a bootloader isn't the only way to program the microcontrollers on these boards. Instead, you can use an external programming device (a.k.a, // |
- | So while it's entirely possible to program many Arduino boards without using a bootloader, you would have to tie up one USB port on your computer for programming | + | So while it's entirely possible to program many Arduino boards without using a bootloader, you would have to tie up one USB port on your computer for the programmer |
===== Cursed is the bootloader ===== | ===== Cursed is the bootloader ===== | ||
- | There are times when you might want to bypass the convenience a bootloader offers | + | In spite of the convenience a bootloader offers, there are times when you might want to forego this and program |
- | Another reason to not use a bootloader is that your project' | + | Another reason to not use a bootloader is that the startup time is critical. The Arduino bootloader introduces about a second and a half delay between power-up/ |
- | Yet another situation where you might not want a bootloader is if you have lowered or disabled the [[https:// | + | Yet another situation where you might not want a bootloader is if you have lowered or disabled the [[https:// |
There are situations apart from these where you wouldn' | There are situations apart from these where you wouldn' | ||
===== Hardware ===== | ===== Hardware ===== | ||
- | You're going to need a device you want to program (e.g., an Arduino board) and a device with which you will do the programming (a.k.a., the programmer). You can see the complete list of programmers supported by the Arduino framework by looking at the list available under //Tools > Programmer: " | + | To program an ATmega328P without a bootloader, you're going to need a device you want to program (e.g., an Arduino board) and a device with which you will do the programming (i.e., the programmer). You can see the complete list of programmers supported by the Arduino framework by looking at the list available under //Tools > Programmer: " |
{{ : | {{ : | ||
Line 27: | Line 27: | ||
That's a lot of options! | That's a lot of options! | ||
- | Below, I cover a few cases to get you started. Most of these use the USBtinyISP.((As near as I can tell, the original source of the USBtinyISP design is Dick Streefland' | + | Below, I cover a few cases to get you started. Most of these use the USBtinyISP.((As near as I can tell, the original source of the USBtinyISP design is Dick Streefland' |
The original USBtinyISP has a built-in 3x2 IDC cable that carries the signals needed for ISP (in-system programming). It also has a 5x2 IDC cable that carries the same signals but in a different layout. | The original USBtinyISP has a built-in 3x2 IDC cable that carries the signals needed for ISP (in-system programming). It also has a 5x2 IDC cable that carries the same signals but in a different layout. | ||
- | If you are using a USBtinyISP clone, there' | + | If you are using a USBtinyISP clone, there' |
Depending on the board you are programming, | Depending on the board you are programming, |
arduino/arduino_without_a_bootloader.txt · Last modified: 2022/05/30 05:46 by mithat