WEEK07-BN.md/.pdf mirroring the -BN series: build/flash/symbol map, load the raw
.bin, dynamic (break at the FAV_NUM printf, live r1=43) then static (resolve
functions incl. lcd_1602.c, patch FAV_NUM 2a->2b, OTHER_FAV_NUM movw 39->40, LCD
'Reverse'->'Exploit'). README links it.