COMMONEMLIB

Detailed Description

General purpose utilities and cross-compiler support.

This SDK supports the following compilers/IDEs:

  • Simplicity Studio
  • IAR Embedded Workbench
  • Atollic TrueSTUDIO IDE
  • Rowley Associates CrossWorks for ARM
  • Keil ┬ÁVision IDE
  • Plain armgcc

Certain compiler features such as alignment is implemented differently in the tools. Therefore, macros such as SL_ALIGN are provided to enable compiler independent code.

Note
RAM code macros are implemented in a separate module RAMFUNC. Cross-compiler RAM code support needs extended documentation and it is therefore implemented as a separate module.

Macros

#define SL_ALIGN(X)
 A macro for aligning a variable.
Use this macro before the variable definition.
X denotes the storage alignment value in bytes.
To be GCC-compatible, use SL_ATTRIBUTE_ALIGN(X) before the semicolon on normal variables. Use SL_ATTRIBUTE_ALIGN(X) before the opening curly brace on structure variables.
 
#define SL_ATTRIBUTE_ALIGN(X)   __attribute__ ((aligned(X)))
 GCC style macro for aligning a variable.
 
#define SL_ATTRIBUTE_PACKED   __attribute__ ((packed))
 A GCC style macro for handling packed structures.
 
#define SL_ATTRIBUTE_SECTION(X)   __attribute__ ((section(X)))
 
#define SL_CEILING(n, i)    ((((n) + (i) - 1U) / (i)) * (i))
 Round n up to closest interval of i.
 
#define SL_FALLTHROUGH
 A macro for notifying the compiler of an intended switch case fallthrough.
 
#define SL_FLOOR(n, i)   ((n / i) * i))
 Round n down to closest interval of i.
 
#define SL_MAX(a, b)   __extension__({ __typeof__(a)_a = (a); __typeof__(b)_b = (b); _a > _b ? _a : _b; })
 A macro for getting the maximum value. No sideeffects, a and b are evaluated one time only.
 
#define SL_MIN(a, b)   __extension__({ __typeof__(a)_a = (a); __typeof__(b)_b = (b); _a < _b ? _a : _b; })
 A macro for getting the minimum value. No sideeffects, a and b are evaluated one time only.
 
#define SL_NORETURN   __attribute__ ((noreturn))
 A macro for handling non-returning functions.
 
#define SL_PACK_END()
 A macro for handling packed structures.
Use this macro after the structure definition.
With GCC, add SL_ATTRIBUTE_PACKED after the closing curly braces of the structure definition.
 
#define SL_PACK_START(x)
 A macro for handling packed structures.
Use this macro before the structure definition.
X denotes the maximum alignment of structure members. X is not supported with GCC. GCC always uses 1 byte maximum alignment.
 
#define SL_WEAK   __attribute__ ((weak))
 A macro for defining a weak symbol.
 
#define STRINGIZE(X)   #X
 Stringify X.
 

Functions

__STATIC_INLINE uint32_t EFM32_CTZ (uint32_t value)
 
__STATIC_INLINE uint32_t SL_CTZ (uint32_t value)
 Count trailing number of zeros. Use CLZ instruction if available.
 
__STATIC_INLINE uint32_t SL_RBIT (uint32_t value)
 Reverse the bits. Use the RBIT instruction if available, else process.
 
__STATIC_INLINE uint32_t SL_RBIT16 (uint32_t value)
 Reverse the bits. Use the RBIT instruction if available, else process.
 

Macro Definition Documentation

#define SL_ATTRIBUTE_SECTION (   X)    __attribute__ ((section(X)))

A macro for placing a variable in a section.
Use this macro after the variable definition, before the equal sign or a semicolon.
X denotes the section to place the variable in.

Definition at line 202 of file em_common.h.

Function Documentation

__STATIC_INLINE uint32_t SL_CTZ ( uint32_t  value)

Count trailing number of zeros. Use CLZ instruction if available.

Parameters
[in]valueData value to check for number of trailing zero bits.
Returns
A number of trailing zeros in value.

Definition at line 224 of file em_common.h.

Referenced by GPIOINT_CallbackRegister(), and RMU_ResetControl().

__STATIC_INLINE uint32_t SL_RBIT ( uint32_t  value)

Reverse the bits. Use the RBIT instruction if available, else process.

Parameters
[in]valueData value to reverse.
Returns
A reversed value.

Definition at line 254 of file em_common.h.

Referenced by SL_RBIT16().

__STATIC_INLINE uint32_t SL_RBIT16 ( uint32_t  value)

Reverse the bits. Use the RBIT instruction if available, else process.

Parameters
[in]value16-bit data value to reverse.
Returns
A 16-bit reversed value.

Definition at line 284 of file em_common.h.

References SL_RBIT().

Referenced by GPCRC_Init().