/component_viewer/objects/object/.../read

Read values of scalar variables or arrays from application program that runs in the target system. A redefinition of a <read> element is not permitted and creates an error.

<read> manages a <member> variable with the following name:

• name._count — number of element in an array (0 .. n-1).

Refer to Predefined variables.

Parent Element	Element Chain
object	/component_viewer/objects/object
list	/component_viewer/objects/object/.../list
Attributes	Description	Type	Use
name	Name of variable. Can be used in Expressions.	xs:string	required
type	Data type read from memory, following types are possible: Scalar Data Types, no pointers allowed Complex Data Types defined with typedef	xs:string	required
size	Is an Expressions representing the array size or the number of values to read from target. The maximum array size is limited to 512. Default value is 1.	xs:string	optional
symbol	Symbol name to access memory in the target system which is used to calculate a memory address.	xs:string	optional
offset	Offset to the attribute symbol address. If no attribute symbol is not specified, then it is the memory address. Default value is 0.	xs:string	optional
const	Variables with attribute const set to "1" are constants that are read only once after debugger start. Default value is 0.	xs:int	optional
info	Descriptive text with additional information (comment).	xs:string	optional
cond	Conditional execution: element is executed when expression result is not 0. Default value is 1.	xs:string	optional
endian	Endianness for scalar data types. endian="L" — little endian. endian="B" — big endian. Default is automatic.	xs:string	optional

Example:

<objects>
  <object name="MyObject">
    <read name="MySymbol" type="MyType" symbol="mysymbol" const="0"/>
  </object>
  
  <object name="Threads">
    <read name="main"           type="uint8_t"     symbol="main"          size="64"    const="1" /> 
    <read name="szText"         type="uint8_t"     symbol="szText"        size="64"    const="1"   cond="0"   info="ignored because of condition" />
    <read name="My_TCB"         type="Thread_CB"      offset="adr_os_idle_TCB + 4"   info="indirect address via offset-expression" />
  
    <list name="Tsk_List">
      <read name="cur_tsk"     type="uint32_t"    symbol="os_tsk"        offset="0"      info="index current running task"    />
      <read name="next_tsk"    type="uint32_t"    symbol="os_tsk"        offset="4"      info="index task that will run next" />
    </list>
  <object>
<objects>