New SDFat version

Question

New SDFat version

jmamma opened this issue 4 years ago · comments

jmamma commented 4 years ago

https://github.com/greiman/SdFat

@yatli ^

Yatao Li commented 4 years ago

ow naw..

Yatao Li · Answer 1 · Sat Nov 21 2020 19:47:21 GMT+0800 (China Standard Time)

So.. we can use it to reduce FW size?

jmamma · Answer 2 · Sat Nov 21 2020 20:38:34 GMT+0800 (China Standard Time)

yes, should be smaller. not sure how much.

jmamma · Answer 3 · Sat Nov 21 2020 20:39:16 GMT+0800 (China Standard Time)

i also discovered that there is a bug with arduino mega bootloader which caused the last 8KB of ROM space to be unusable.

Yatao Li · Answer 4 · Sat Nov 21 2020 20:55:24 GMT+0800 (China Standard Time)

I followed the url you provided -- it looks like it's a FUSE setting that protects the region?

jmamma · Answer 5 · Sat Nov 21 2020 21:00:49 GMT+0800 (China Standard Time)

yes possibly.

Yatao Li · Answer 6 · Sat Nov 21 2020 21:06:12 GMT+0800 (China Standard Time)

https://github.com/Optiboot/optiboot is an alternative bootloader with reduced size (512 bytes only), and hopefully, does not inherit the bugs from the official bootloader.

Any mods done to the bootloader will require an ISP programmer, though.

Yatao Li · Answer 7 · Sat Nov 21 2020 21:09:18 GMT+0800 (China Standard Time)

Oh wait...
This can be done with a loader program, self-programming the chip:

https://github.com/Optiboot/optiboot/wiki/InstallingOnChips#installing-using-a-specialized-bootloader-loader-sketch

jmamma · Answer 8 · Sat Nov 21 2020 21:10:27 GMT+0800 (China Standard Time)

I think you still need to go through ISP