hi Nigel and all
iam trying to insert a 3x4 keypad on pic16f84a project,
1. as afirst step i try to simulate Nigel Tutorial 9.3 and make needed changes on the asm file to change pic628 with pic16f84a
2. unfortunally the hardware assigned for this tuorial is very confusing , it connect rows 4...1 to RB0...RB3 , while in the code RB0...RB3 assumed as inputs also RB4...RB7 asumed as outputs , while they are connected to Columns which supposed to be inputs with pull up resistor,
Iam using protus simulator to simulate this toutrial but i get uncorrect data about the pressed key or some times nothing at all..
your comment on these notes will higly appriciated
best regards
iam trying to insert a 3x4 keypad on pic16f84a project,
1. as afirst step i try to simulate Nigel Tutorial 9.3 and make needed changes on the asm file to change pic628 with pic16f84a
2. unfortunally the hardware assigned for this tuorial is very confusing , it connect rows 4...1 to RB0...RB3 , while in the code RB0...RB3 assumed as inputs also RB4...RB7 asumed as outputs , while they are connected to Columns which supposed to be inputs with pull up resistor,
Iam using protus simulator to simulate this toutrial but i get uncorrect data about the pressed key or some times nothing at all..
your comment on these notes will higly appriciated
best regards