variable modifiers / aliases...

ok, first off... i'm now the proud owner of PBP2.60a... u2 programmer is also on it's way...

i'm driving a stepper motor driver IC from a pic.
the driver IC has several inputs for it's settings...

For example, torque setting is two bits (4 settings), 25%(00), 50%(01) 75%(10) and 100% (11).
PBP doesn't support doing the following...

Code:

---

Torque var byte
torque.0 var PORTD.6
Torque.1 var PORTD.5

---

The torque setting is changed from the menu (to be writen) so it would be easier to just increase the variable by 1 up to 4 rarther than having to mess around with torque1 and torque2 separate vars.

is their a better way?
Thanks

I can suggest the following solution:

Code:

---

Torque  Var Byte

Select Case Torque

Case Torque = 25
PortD.6 = 0: PortD.5 = 0

Case Torque = 50
PortD.6 = 0: PortD.5 = 1

Case Torque = 75
PortD.6 = 1: PortD.5 = 0

Case Torque = 100
PortD.6 = 1: PortD.5 = 1

End Select

---

Cheers

Al.

hmmm, never used select... I'll look it up in the manual for some bedtime reading... :cool:

Thanks for that aratti.

Edit: i looked in the manual, it doesn't specify if select case is used once or is 'ran' whenever you want to update?

Quote:

---

Edit: i looked in the manual, it doesn't specify if select case is used once or is 'ran' whenever you want to update?

---

I suggest you to place the snippet in a subroutine and call it, with a GOSUB, all the times you need to change your torque setting.

Al.

Thats what i thought...

I think i'll put all three in an 'update' subroutine since at the moment it's only called twice, one at initialisation and once when you hit the 'go' button. however, a later revision may decide that you can change these settings while it's running...

thanks again aratti :)

If you really need soft then Arrati has it.

Personally, I would start a project like that with torque select jumpers on the board and save precious pins for the feature creep you know is coming.