Radio Private Functions

Functions
void	S2LPRadioSearchDatarateME (uint32_t lDatarate, uint16_t *pcM, uint8_t *pcE)
	Returns the mantissa and exponent, whose value used in the datarate formula will give the datarate value closer to the given datarate. More...
void	S2LPRadioSearchFreqDevME (uint32_t lFDev, uint8_t *pcM, uint8_t *pcE)
	Returns the mantissa and exponent, whose value used in the frequency deviation formula will give a frequency deviation value most closer to the given frequency deviation. More...
void	S2LPRadioSearchChannelBwME (uint32_t lBandwidth, uint8_t *pcM, uint8_t *pcE)
	Returns the mantissa and exponent for a given bandwidth. Even if it is possible to pass as parameter any value in the below mentioned range, the API will search the closer value according to a fixed table of channel bandwidth values (s_vectnBandwidth), as defined in the datasheet, returning the corresponding mantissa and exponent value. More...
uint32_t	S2LPRadioComputeDatarate (uint16_t cM, uint8_t cE)
	Returns the mantissa and exponent, whose value used in the datarate formula will give the datarate value closer to the given datarate. More...
uint32_t	S2LPRadioComputeFreqDeviation (uint8_t cM, uint8_t cE, uint8_t bs, uint8_t refdiv)
	Returns the mantissa and exponent, whose value used in the datarate formula will give the datarate value closer to the given datarate. More...
uint32_t	S2LPRadioComputeChannelFilterBw (uint8_t cM, uint8_t cE)
	Computes the channel filter value starting from mantissa and exponent. More...
uint32_t	S2LPRadioComputeFrequencyBase (uint32_t lSynthWord, uint8_t bs, uint8_t refdiv)
	Computes a frequency from a given SYNTH word. More...
uint32_t	S2LPRadioComputeSynthWord (uint32_t frequency, uint8_t refdiv)
	Computes the synth word from a given frequency. More...
uint8_t	S2LPRadioComputeChannelSpacingRegValue (uint32_t lChannelSpace)
	Computes the channel space register staring from the channel space value in Hz. The channel spacing step is F_Xo/32768. More...
uint32_t	S2LPRadioComputeChannelSpacing (uint8_t cChSpaceRegVal)
	Compute the channel spacing register from the channel spacing given in Hz. The channel spacing step is F_Xo/32768. More...
void	S2LPRadioComputeIF (uint32_t nIF, uint8_t *pcAnaIf, uint8_t *pcDigIf)
	Computes the ANALOG_IF and DIGITAL_IF register values staring from a image frequency value in Hz. More...
void	S2LPRadioSearchWCP (uint8_t *cp_isel, uint8_t *pfd_split, uint32_t lFc, uint8_t refdiv)
	Returns the charge pump word for a given VCO frequency. More...

Detailed Description

Function Documentation

S2LPRadioComputeChannelFilterBw()

uint32_t S2LPRadioComputeChannelFilterBw	(	uint8_t	cM,
		uint8_t	cE
	)

Parameters

cM	mantissa value.
cE	exponent value.

Return values

uint32_t

the channel filter value in Hz.

Definition at line 386 of file S2LP_Radio.c.

S2LPRadioComputeChannelSpacing()

uint32_t S2LPRadioComputeChannelSpacing

(

uint8_t

cChSpaceRegVal

)

Parameters

cChSpaceRegVal

the channel spacing register

Return values

uint32_t

The channel specing value in Hz.

Definition at line 461 of file S2LP_Radio.c.

S2LPRadioComputeChannelSpacingRegValue()

uint8_t S2LPRadioComputeChannelSpacingRegValue

(

uint32_t

lChannelSpace

)

Parameters

lChannelSpace

the channel spacing expressed in Hz.

Return values

uint8_t

The channel specing register value .

Definition at line 449 of file S2LP_Radio.c.

Referenced by S2LPRadioSetChannelSpace().

S2LPRadioComputeDatarate()

uint32_t S2LPRadioComputeDatarate	(	uint16_t	cM,
		uint8_t	cE
	)

Parameters

fDatarate	datarate expressed in bps. This parameter ranging between 100 and 500000.
pcM	pointer to the returned mantissa value.
pcE	pointer to the returned exponent value.

Return values

None.

Definition at line 341 of file S2LP_Radio.c.

S2LPRadioComputeFreqDeviation()

uint32_t S2LPRadioComputeFreqDeviation	(	uint8_t	cM,
		uint8_t	cE,
		uint8_t	bs,
		uint8_t	refdiv
	)

Parameters

fDatarate	datarate expressed in bps. This parameter ranging between 100 and 500000.
pcM	pointer to the returned mantissa value.
pcE	pointer to the returned exponent value.

Return values

None.

Definition at line 368 of file S2LP_Radio.c.

S2LPRadioComputeFrequencyBase()

uint32_t S2LPRadioComputeFrequencyBase	(	uint32_t	lSynthWord,
		uint8_t	bs,
		uint8_t	refdiv
	)

Parameters

lSynthWord	the given SYNTH word.
bs	value of the PLL divider.
refdiv	reference divider value value (it can be only 1 or 2).

Return values

uint32_t

the frequency base filter value in Hz.

Definition at line 406 of file S2LP_Radio.c.

S2LPRadioComputeIF()

void S2LPRadioComputeIF	(	uint32_t	nIF,
		uint8_t *	pcAnaIf,
		uint8_t *	pcDigIf
	)

Parameters

nIF	datarate expressed in bps. This parameter ranging between 100 and 500000.
pcAnaIf	pointer to the register of analog IF.
pcDigIf	pointer to the returned of digital IF.

Return values

None.

Definition at line 475 of file S2LP_Radio.c.

S2LPRadioComputeSynthWord()

uint32_t S2LPRadioComputeSynthWord	(	uint32_t	frequency,
		uint8_t	refdiv
	)

Parameters

frequency	Target frequency value expressed in Hz.
refdiv	reference divider value value (it can be only 1 or 2).

Return values

uint32_t

SYNTH_WORD.

Definition at line 418 of file S2LP_Radio.c.

S2LPRadioSearchChannelBwME()

void S2LPRadioSearchChannelBwME	(	uint32_t	lBandwidth,
		uint8_t *	pcM,
		uint8_t *	pcE
	)

Parameters

lBandwidth	bandwidth expressed in Hz. This parameter ranging between 1100 and 800100.
pcM	pointer to the returned mantissa value.
pcE	pointer to the returned exponent value.

Return values

None.

Definition at line 291 of file S2LP_Radio.c.

S2LPRadioSearchDatarateME()

void S2LPRadioSearchDatarateME	(	uint32_t	lDatarate,
		uint16_t *	pcM,
		uint8_t *	pcE
	)

Parameters

fDatarate	datarate expressed in bps. This parameter ranging between 100 and 500000.
pcM	pointer to the returned mantissa value.
pcE	pointer to the returned exponent value.

Return values

None.

Definition at line 192 of file S2LP_Radio.c.

S2LPRadioSearchFreqDevME()

void S2LPRadioSearchFreqDevME	(	uint32_t	lFDev,
		uint8_t *	pcM,
		uint8_t *	pcE
	)

Parameters

fFDev	frequency deviation expressed in Hz. This parameter can be a value in the range [F_Xo*8/2^18, F_Xo*7680/2^18].
pcM	pointer to the returned mantissa value.
pcE	pointer to the returned exponent value.

Return values

None.

Definition at line 236 of file S2LP_Radio.c.

References MIDDLE_BAND_FACTOR.

S2LPRadioSearchWCP()

void S2LPRadioSearchWCP	(	uint8_t *	cp_isel,
		uint8_t *	pfd_split,
		uint32_t	lFc,
		uint8_t	refdiv
	)

Parameters

cp_isel	pointer to the charge pump register value.
pfd_split	pointer to the pfd register value.
lFc	channel center frequency expressed in Hz. This parameter can be a value in one of the following ranges: High_Band: from 779 MHz to 915 MHz Middle Band: from 387 MHz to 470 MHz
refdiv	reference divider value value (it can be only 1 or 2).

Return values

uint8_t

Charge pump word.

Definition at line 499 of file S2LP_Radio.c.

References MIDDLE_BAND_FACTOR.