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  about 1 year ago by aschnell | Reply

  The bootloader is working.

  The hardware is a AVR ATmega328P connected 1. via an FTI232 and USB and 2. via an USBTiny ISP to the computer. The USBTiny is used to flash the bootloader to the AVR. The AVR is programmed to start the bootloader on reset. The bootloader communicates via the FTI232 (so the UART) with the computer.

  Once the bootloader is running, screen can be used to connect to it and thus to program and control the AVR:

  The bootloader itself looks more like WozMon than any Arduino stuff AFAIK. It has three commands:

  • LPM (load program memory) to read the flash
  • SPM (store program memory) to write the flash
  • jmp to start the application code

  I managed to write a program using two flash pages to the AVR and start it.

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Edit Comment 7634
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The bootloader is working. The hardware is a AVR ATmega328P connected 1. via an FTI232 and USB and 2. via an USBTiny ISP to the computer. The USBTiny is used to flash the bootloader to the AVR. The AVR is programmed to start the bootloader on reset. The bootloader communicates via the FTI232 (so the UART) with the computer. Once the bootloader is running, screen can be used to connect to it and thus to program and control the AVR: The bootloader itself looks more like WozMon than any Arduino stuff AFAIK. It has three commands: * LPM (load program memory) to read the flash * SPM (store program memory) to write the flash * jmp to start the application code I managed to write a program using two flash pages to the AVR and start it.
 
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Reply to aschnell
The bootloader is working.
The hardware is a AVR ATmega328P connected 1. via an FTI232 and USB and 2. via an USBTiny ISP to the computer. The USBTiny is used to flash the bootloader to the AVR. The AVR is programmed to start the bootloader on reset. The bootloader communicates via the FTI232 (so the UART) with the computer.
Once the bootloader is running, screen can be used to connect to it and thus to program and control the AVR:
The bootloader itself looks more like WozMon than any Arduino stuff AFAIK. It has three commands:
• LPM (load program memory) to read the flash
• SPM (store program memory) to write the flash
• jmp to start the application code
I managed to write a program using two flash pages to the AVR and start it.
---
# A First Level Header
## A Second Level Header

Use one asterisk to *emphasize*

Use two asterisks for **strong emphasis**

- Use hyphens
- for unordereed
- lists

This is an [link to example.com](http://example.com/)

This is an image ![an openSUSE geeko icon](https://en.opensuse.org/images/d/d0/Icon-distribution.png)

This is a user link @hans

This is a project link hw#some-cool-title
More Complex Markdown Help
Formatting Help
• Edit
• Preview