Bootloader

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Ayman89
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Posted by Ayman89: Sun. Jul 29, 2018 - 08:31 PM
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hello,

I got some schematic for a development board for AVR.

but for programming it for the first time, should i use external programmer to download the bootloader into AVR or it can happen using the ft232 chip which fixed on the chip?

 

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Tools, In-System Debuggers and Programmers
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westfw
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Posted by westfw: Sun. Jul 29, 2018 - 08:54 PM
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For programming the first time, you need an external programmer.

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ka7ehk
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Posted by ka7ehk: Sun. Jul 29, 2018 - 08:59 PM
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Unless you START with a micro that has the bootloader pre-installed. Such as an Arduino board. Then, you can program via USB with no programmer.

 

Jim

Jim Wagner Oregon Research Electronics, Consulting Div. Tangent, OR, USA http://www.orelectronics.net

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awneil
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Posted by awneil: Mon. Jul 30, 2018 - 07:06 AM
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Why not just get one of the XPlained Pro/Mini/Nano boards - they come with a proper on-board debuggger: so no need to mess about with bootloaders!

 

See: https://www.avrfreaks.net/commen...

 

and: https://www.avrfreaks.net/commen...

 

 

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillator: https://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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