Renesas M16C PC4701 用户手册

 
 

 

12.1.2.3 The debugger for 740 

Only the ROM area memory-mapped in the area set as Internal can be designated for software 
breakpoint.  
You cannot set software breakpoint in ROM areas memory-mapped in the SFR area, RAM area or 
other areas set as External.   
 
 

12.1.3 Get or set C variables 

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If a variable is declared with the same name as the type definition name declared by typedef, you 
cannot reference that variable. 

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Values cannot be changed for register variables. 

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Values cannot be changed for 64 bit width variables (long long, double, and so on). 

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Values cannot be changed for C/C++ expressions that do not indicate the memory address and 
size.  

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For the sake of optimization, the C compiler may place different variables at the same address. In 
this case, values of the C variable may not be displayed correctly. 

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Literal character strings can only be substituted for char array and char pointer type variables.   

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No arithmetic operations can be performed on floating point types. 

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No sign inversion can be performed on floating point types.   

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Casting cannot be performed on floating point types.   

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Casting cannot be performed on register variables.   

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Casting cannot be performed on structure types, union types, or pointer types to structure or 
union types. 

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Character constants and literal character strings cannot contain escape sequences. 

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The following values can be substituted for the bit-fields. 
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  integer constants, character constants, and enumerators 

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  variables of bool types, characters types, integers types, and enumeration types 

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 bit-field 

When the substituted value is larger than the size of the bit-field, it will be truncated. 

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The bit-field member allocated in the SFR area might not be transformed into a correct value. 

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While the target program is running, values of local variables and bit-fields cannot be modified. 

 

 

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