Expression Formatting

The Atmel Studio debugger includes expression evaluators that work when you enter an expression in the QuickWatch and Watches, Memory View, Watch Window, or Immediate window. The expression evaluators are also at work in the Breakpoints window and many other places in the debugger.

General Syntax:

Val, formatString

Format Specifier for values

The following tables show the format specifiers recognized by the debugger.

Table 1. Debug Format Specifiers for Values
Specifier	Format	Expression	Value Displayed
d,i	Signed decimal integer	0xF000F065, d	-268373915
u	Unsigned decimal integer	0x0065, u	101
b	Unsigned binary number	0xaa,b2	0b10101010
o	Unsigned octal integer	0xF065, o	0170145
x,X	Hexadecimal integer	61541, x	0x0000F065
1,2,4,8	As a suffix specifying number of bytes for: d, i, u, o, x, X.	00406042,x2	0x0c22
s	String	0x2000, s	'Hello World'
f	Signed floating point	(3./2.), f	1.500000
e	Signed scientific notation	(3./2.), e	1.500000e+000
g	Signed floating point or signed scientific notation, whichever is shorter	(3./2.), g	1.5
c	Single character	0x0065, c	101 'e'

Size Specifier for Pointers as Arrays

If you have a pointer to an object you want to view as an array, you can use an integer to specify the number of array elements:

ptr,10 or array,20

Memory type specifier

The following memory type specifiers will force the memory reference to a specific memory type. To be used in the memory window in the address field, you should have a pointer to an object you want to view as an array. You can use an integer to specify the number of the array elements:

Table 2. Debug Memory Type Specifiers
Specifier	Expression	Value Displayed
flash or program	Program memory	0,flash
data	Data memory	0x2000,data
sram	SRAM	0x100,sram
reg or registers	Registers	1,reg
io, eeprom, fusebytes, lockbytes, signature, usersign, prodsign	Memory types with same names