Various types and definitions available to all applications. More...

Data Structures
struct	uint8_array_t
	Byte array type. More...

Macros
#define	STATIC_ASSERT(EXPR) typedef char static_assert_failed[(EXPR) ? 1 : -1]
	Macro for doing static (i.e. compile time) assertion. More...

#define	ROUNDED_DIV(A, B) (((A) + ((B) / 2)) / (B))
	Perform rounded integer division (as opposed to truncating the result). More...

#define	IS_POWER_OF_TWO(A) ( ((A) != 0) && ((((A) - 1) & (A)) == 0) )
	Check if the integer provided is a power of two. More...

#define	MSEC_TO_UNITS(TIME, RESOLUTION) (((TIME) * 1000) / (RESOLUTION))
	To convert milliseconds to ticks. More...

#define	CEIL_DIV(A, B)
	Perform integer division, making sure the result is rounded up. More...

Typedefs
typedef uint8_t	uint16_le_t [2]
	type for holding an encoded (i.e. little endian) 16 bit unsigned integer.

typedef uint8_t	uint32_le_t [4]
	type for holding an encoded (i.e. little endian) 32 bit unsigned integer.

Enumerations
enum	{ UNIT_0_625_MS = 625, UNIT_1_25_MS = 1250, UNIT_10_MS = 10000 }

Functions
static __INLINE uint8_t	uint16_encode (uint16_t value, uint8_t *p_encoded_data)
	Function for encoding a uint16 value. More...

static __INLINE uint8_t	uint32_encode (uint32_t value, uint8_t *p_encoded_data)
	Function for encoding a uint32 value. More...

static __INLINE uint16_t	uint16_decode (const uint8_t *p_encoded_data)
	Function for decoding a uint16 value. More...

static __INLINE uint32_t	uint32_decode (const uint8_t *p_encoded_data)
	Function for decoding a uint32 value. More...

static __INLINE uint8_t	battery_level_in_percent (const uint16_t mvolts)
	Function for converting the input voltage (in milli volts) into percentage of 3.0 Volts. More...

static __INLINE bool	is_word_aligned (void *p)
	Function for checking if a pointer value is aligned to a 4 byte boundary. More...

Detailed Description

Various types and definitions available to all applications.

Macro Definition Documentation

#define CEIL_DIV	(	A,
		B
	)

Value:

/*lint -save -e573 */   \
    ((((A) - 1) / (B)) + 1) \
    /*lint -restore */

Perform integer division, making sure the result is rounded up.

One typical use for this is to compute the number of objects with size B is needed to hold A number of bytes.

Parameters

[in]	A	Numerator.
[in]	B	Denominator.

Returns: Integer result of dividing A by B, rounded up.

#define IS_POWER_OF_TWO ( A ) ( ((A) != 0) && ((((A) - 1) & (A)) == 0) )

Check if the integer provided is a power of two.

Parameters

[in] A Number to be tested.

Returns: true if value is power of two.; false if value not power of two.

#define MSEC_TO_UNITS	(	TIME,
		RESOLUTION
	)	(((TIME) * 1000) / (RESOLUTION))

To convert milliseconds to ticks.

Parameters

[in]	TIME	Number of milliseconds to convert.
[in]	RESOLUTION	Unit to be converted to in [us/ticks].

#define ROUNDED_DIV	(	A,
		B
	)	(((A) + ((B) / 2)) / (B))

Perform rounded integer division (as opposed to truncating the result).

Parameters

[in]	A	Numerator.
[in]	B	Denominator.

Returns: Rounded (integer) result of dividing A by B.

#define STATIC_ASSERT ( EXPR ) typedef char static_assert_failed[(EXPR) ? 1 : -1]

Macro for doing static (i.e. compile time) assertion.

Note: If the assertion fails when compiling using Keil, the compiler will report error message "error: #94: the size of an array must be greater than zero" (while gcc will list the symbol static_assert_failed, making the error message more readable). If the supplied expression can not be evaluated at compile time, Keil will report "error: #28: expression must have a constant value".; The macro is intentionally implemented not using do while(0), allowing it to be used outside function blocks (e.g. close to global type- and variable declarations). If used in a code block, it must be used before any executable code in this block.

Parameters

[in] EXPR Constant expression to be verified.

Enumeration Type Documentation

anonymous enum

Enumerator
UNIT_0_625_MS	Number of microseconds in 0.625 milliseconds.
UNIT_1_25_MS	Number of microseconds in 1.25 milliseconds.
UNIT_10_MS	Number of microseconds in 10 milliseconds.

Function Documentation

static __INLINE uint8_t battery_level_in_percent ( const uint16_t mvolts )

static

Function for converting the input voltage (in milli volts) into percentage of 3.0 Volts.

The calculation is based on a linearized version of the battery's discharge curve. 3.0V returns 100% battery level. The limit for power failure is 2.1V and is considered to be the lower boundary.

The discharge curve for CR2032 is non-linear. In this model it is split into 4 linear sections:

Section 1: 3.0V - 2.9V = 100% - 42% (58% drop on 100 mV)
Section 2: 2.9V - 2.74V = 42% - 18% (24% drop on 160 mV)
Section 3: 2.74V - 2.44V = 18% - 6% (12% drop on 300 mV)
Section 4: 2.44V - 2.1V = 6% - 0% (6% drop on 340 mV)

These numbers are by no means accurate. Temperature and load in the actual application is not accounted for!

Parameters

[in] mvolts The voltage in mV

Returns: Battery level in percent.

static __INLINE bool is_word_aligned ( void * p )

static

Function for checking if a pointer value is aligned to a 4 byte boundary.

Parameters

[in] p Pointer value to be checked.

Returns: TRUE if pointer is aligned to a 4 byte boundary, FALSE otherwise.

static __INLINE uint16_t uint16_decode ( const uint8_t * p_encoded_data )

static

Function for decoding a uint16 value.

Parameters

[in] p_encoded_data Buffer where the encoded data is stored.

Returns: Decoded value.

static __INLINE uint8_t uint16_encode	(	uint16_t	value,
		uint8_t *	p_encoded_data
	)

static

Function for encoding a uint16 value.

Parameters

[in]	value	Value to be encoded.
[out]	p_encoded_data	Buffer where the encoded data is to be written.

Returns: Number of bytes written.

static __INLINE uint32_t uint32_decode ( const uint8_t * p_encoded_data )

static

Function for decoding a uint32 value.

Parameters

[in] p_encoded_data Buffer where the encoded data is stored.

Returns: Decoded value.

static __INLINE uint8_t uint32_encode	(	uint32_t	value,
		uint8_t *	p_encoded_data
	)

static

Function for encoding a uint32 value.

Parameters

[in]	value	Value to be encoded.
[out]	p_encoded_data	Buffer where the encoded data is to be written.

Returns: Number of bytes written.

Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation