ch341par.exe -w 0xAA Control register bit 0 = STROBE, active low.
ch341par.exe -s 0x0D ; low ch341par.exe -s 0x0C ; high -r returns status byte. Busy is bit 7 (value 0x80). Invert logic (busy low = printer busy). ch341par.exe
First set all control pins high (inactive except INIT which is active high): ch341par
ch341par.exe -s 0x0C ; 0x0C = 00001100 → INIT=1, others high Then pulse strobe low and back: active low. ch341par.exe -s 0x0D
C:\Program Files (x86)\CH341\CH341PAR\ch341par.exe