sdinnu:
However that also changes the start address to 3E00 rather than 3C00 which is mentioned in the bootloader's README. When i try to flash the bootloader with the bolded fuses, it only works if I bootload at address 3C00, and even after that I have the same problem of although it boots, any attempt to upload code results in that error flash. Maybe the bootloader doesnt work with the atmega328p?
Wait, wait. You have an Atmega328P, right? So that has 32 Kb of Program Memory.
Valid bootloader addresses are:
- No bootloader: start at address 0x0000
- Small bootloader (512 bytes): start at address 0x7E00
- Larger bootloader (1024 bytes): start at address 0x7C00
- Even larger bootloader (2048 bytes): start at address 0x7800
- Largest bootloader (4096 bytes): start at address 0x7000
These are byte addresses not word addresses. The fuse calculator talks in word addresses. So if you have a 1024 byte bootloader it starts at byte 0x7C00 or word 0x3E00. So it should be compiled to start at (byte) 0x7C00, and the high fuse should be 0xDC (512 word, 1024 byte, bootloader).