view most significant bit

I

ibwev

Member

• May 20, 2011

• #1

How do I view the most significant byte of a 2 byte variable? I have attached a section of code that I am using. The variable "RPM" under View:Watch of MPLAB is only1 byte long.

 

Attachments

• helpac.txt

  1 KB · Views: 192

Ian Rogers

User Extraordinaire

Forum Supporter

Most Helpful Member

• May 20, 2011

• #2

In MPLAB you can watch virtually any variable...just put them in order.. lowByte and then HighByte

 

Joe G

Member

• May 20, 2011

• #3

would that be under "view" then "watch" ? i'm curiouse also, i've been just movfw then movwf of say portc????

 

I

ibwev

Member

• May 20, 2011

• #4

Thanks for the response.

When I declared the 2 byte variable, I set it up this way:

variable res 2

To be able to view the variable, should I set it up this way:

variableLOW res 1
variableHIGH res 1

 

I

ibwev

Member

• May 20, 2011

• #5

View variables under View:Watch of MPLAB then "Add SFR" (Special Function Register) and/or "add GPR" (General Purpose Register). Apparently, only 1 byte of a variable can be viewed.

 

Ian Rogers

User Extraordinaire

Forum Supporter

Most Helpful Member

• May 21, 2011

• #6

When vladimir from oshonsoft declares int's and long's he uses R0L , R0H, R1L, R1H.. This way when you watch the variable you can select them from the drop down box in the watch window.

 

L

Lourens

Member

• Jun 2, 2011

• #7

With MPLAB (using assembler) you can view and modify from a single bit to 4byte floating point numbers. Add the variable to Watch, right click it, popup allow you to select format.