Added Optiboot 8.1

ArminJo · Mar 2, 2024 · 93d659c · 93d659c
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diff --git a/Optiboot_8_1/0_Burn_avrdude-optiboot_P81_to_328P.cmd b/Optiboot_8_1/0_Burn_avrdude-optiboot_P81_to_328P.cmd
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+@echo Burn standard Uno 328P Bootloader V8.1 on a 328P by avrdude
+rem unlock bootloader 0x3x No restrictions for SPM or LPM accessing the boot loader section. 0xDE is for 512 bytes bootsize.
+rem lfuse 0xFF is low power crystal 8 to 16 Mhz, 0xF7 is full swing crystal. Both with slowly rising power.
+avrdude -v -patmega328p -cstk500v1 -PCOM6 -b19200 -e -Ulock:w:0x3F:m -Uefuse:w:0xFD:m -Uhfuse:w:0xDE:m -Ulfuse:w:0xFF:m
+rem lock bootloader against overwriting, but allow reading for do_spm() feature with: lock=0x2x. No access to bootloader with 0x0x.
+avrdude -v -patmega328p -cstk500v1 -PCOM6 -b19200 -u -Uflash:w:optiboot_atmega328P_81.hex:a -Ulock:w:0x0F:m
+pause