Event Compile.GetVarSize: Difference between revisions

Revision as of 11:42, 16 January 2023

	GetVarSize
Sent to a component to amend the size of the expected array
- STRING	VarName
The original Flowcode variable
- ULONG	Elements
The number of elements in the array
- NONE	Return

Detailed description

No additional information

Examples

On some microcontroller devices there are sometimes limitation on the size of a single data array or other reasons to adjust the size of a variable based on a set of parameters etc.

For example if we try and create an array of size bigger then 256 bytes then this will cause a compilation error.

#define FCVsz_DATAARRAY 500

GetVarSize.c(53): error: total number of array elements can not exceed 0x100

By enabling the GetVarSizeevent we can override the number of elements in the array.

Inside the event macro we check for the name of the variable with the size we want to override and overwrite the .Elements local variable to edit the array size.

After saving the project and refreshing the C code window the variable now looks like this.

#define FCVsz_DATAARRAY 255

And during compilation we now get this.

success

Here is the file as a demonstration.

Get Var Size Event Example

@@ Line 1: / Line 1: @@
-<sidebar>Event Contents</sidebar>
+{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
-Sent to a component to amend the size of the expected array
+|-
+| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
-This event is part of the [[Event class Compile|Compile]] class
+| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''GetVarSize'''
+|-
-__TOC__
+| colspan="2" | Sent to a component to amend the size of the expected array&nbsp;
+|-
-==Parameters==
+|-
-[[Variable Types|STRING]] ''VarName''
+| width="10%" align="center" | [[File:Fc9-string-icon.png]] - STRING
-:The original Flowcode variable
+| width="90%" | VarName
+|-
-[[Variable Types|ULONG]] ''Elements''
+| colspan="2" | The original Flowcode variable&nbsp;
-:The number of elements in the array
+|-
-:''This parameter is returned back to Flowcode''
+| width="10%" align="center" | [[File:Fc9-u32-icon.png]] - ULONG
+| width="90%" | Elements
+|-
-==Return value==
+| colspan="2" | The number of elements in the array&nbsp;
-[[Variable Types|ULONG]]
+|-
-The return of this event is currently unused
+| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - NONE
+| width="90%" style="border-top: 2px solid #000;" | ''Return''
+|}

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Revision as of 11:42, 16 January 2023

Detailed description

Examples