Data: 0x00 Status: 0x79 Control: 0x0F Interpretation depends on your wiring. ch341par.exe -w 255 Now pins 2-9 go high (+5V / 3.3V depending on adapter). Example 3: Set data pins to binary pattern To set D7..D0 = 10101010 (0xAA):
for _ in range(10): write_parallel(255) time.sleep(0.5) write_parallel(0) time.sleep(0.5) ch341par.exe is a simple but effective tool for low-speed parallel port control over USB. While limited compared to full CH341 DLL access, it’s perfect for quick testing, education, and basic automation scripts. ch341par.exe
First set all control pins high (inactive except INIT which is active high): Data: 0x00 Status: 0x79 Control: 0x0F Interpretation depends
C:\Program Files (x86)\CH341\CH341PAR\ch341par.exe it’s perfect for quick testing
ch341par.exe -w 0xAA Control register bit 0 = STROBE, active low.