COMMELL LV-66A - Manual (Page 59)

LV-66A User’s Manual Programming GPIO’s
59
Appendix D
The GPIO can be programmed with the MSDOS debug program using
simple
IN/OUT commands. The following lines show an example how to do this.
GPIO0...GPIO7 bit0……bit7
-o 2E 87
-o 2E 87 ;enter configuration
-o 2E 07
-o 2F 07 ;select logic device 7
-o 2E 29
-o 2F D4 ;General Purpose I/O Port 1 (pin121~128 select function)
-o 2E 30
-o 2F 01 ;undate Activate GPIO’Svu04
-o 2E F0
-o 2F xx ;set GPIO as input/output; set ‘1’ for input,’0’for output
-o 2E F1
-o 2F xx ;if set GPIO’s as output, in this register its value can be set
Optional :
-o 2E F2
-o 2F xx ;Data inversion register ; ‘1’ inverts the current value of the
bits ,’0’ leaves them as they are
For further information, please refer to Winbond W83697HG