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Linduino
1.3.0
Linear Technology Arduino-Compatible Demonstration Board
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Library for LTC6948: Ultralow Noise and Spurious 0.37GHz to 6.39GHz FracN Synthesizer with Integrated VCO. More...
Library for LTC6948: Ultralow Noise and Spurious 0.37GHz to 6.39GHz FracN Synthesizer with Integrated VCO.
Definition in file LTC6948.cpp.
Go to the source code of this file.
Functions | |
uint8_t | LTC6948_read (uint8_t cs, int8_t address) |
LTC6948 Read Single Address reads 8 bit Data field to LTC6948. More... | |
long | LTC6948_read_field (uint8_t cs, uint8_t address, uint8_t MSB_loc, uint8_t numbits) |
LTC6948 Read Single Field For SPI FIELDS located in 1 or multiple address locations reads specific address locations identifies and returns specific field in question can handle SPI fields in multiple addresses, if MSB bit is in the lower number address. More... | |
long | get_LTC6948_SPI_FIELD (uint8_t cs, uint8_t f) |
Gets the LTC6948 SPI field value calls function LTC6948_read_field, which reads specific address locations identifies and returns specific field in question can handle SPI fields in multiple addresses, if MSB bit is in the lower number address. More... | |
void | LTC6948_write (uint8_t cs, uint8_t address, uint8_t Data) |
LTC6948 Write Single Address writes 8 bit Data field to LTC6948. More... | |
uint8_t | LTC6948_write_field (uint8_t cs, long field_data, uint8_t address, uint8_t MSB_loc, uint8_t numbits) |
LTC6948 Write Single Field For SPI FIELDS in 1 or multiple address locations reads specific address/field location then writes to specific field can handle SPI fields in multiple addresses, if MSB bit is in the lower number address. More... | |
uint8_t | get_LTC6948_REGSIZE () |
returns # of addresses in parts register map (array size) More... | |
uint8_t | get_LTC6948_SPI_FIELD_NUMBITS (uint8_t f) |
returns the number of bits for a given field name in the SPI map More... | |
uint8_t | get_LTC6948_SPI_FIELD_RW (uint8_t f) |
returns if the given field name is (0)read/write or (1)read_only field More... | |
void | set_LTC6948_SPI_FIELD (uint8_t cs, uint8_t f, long field_data) |
Sets the LTC6948 SPI field value calls function LTC6948_read_field, which reads specific address/field location then writes to specific field can handle SPI fields in multiple addresses, if MSB bit is in the lower number address. More... | |
void | set_LTC6948_ALLREGS (uint8_t cs, uint8_t reg01, uint8_t reg02, uint8_t reg03, uint8_t reg04, uint8_t reg05, uint8_t reg06, uint8_t reg07, uint8_t reg08, uint8_t reg09, uint8_t reg0A, uint8_t reg0B, uint8_t reg0C, uint8_t reg0D) |
Writes values to ALL LTC6948 RW address. More... | |
void | LTC6948_init () |
Initializes the SPI MAP arrays The values set in initialization are used all the LTC6948 SPI/WRITE and read functions (set_LTC6948_SPI_FIELD, get_LTC6948_SPI_FIELD, LTC6948_read, LTC6948_write, etc, etc) More... | |
void | set_LTC6948_global_fref (unsigned long fref_MHz, unsigned long fref_Hz) |
sets globals LTC6948_Fref_MHz and LTC6948_Fref_Hz More... | |
void | set_LTC6948_global_frf (unsigned long frf_MHz, unsigned long frf_Hz) |
sets globals LTC6948_Frf_MHz and LTC6948_Frf_Hz More... | |
unsigned long | get_LTC6948_global_fref_MHz () |
returns global LTC6948_Fref_MHz More... | |
unsigned long | get_LTC6948_global_fref_Hz () |
returns global LTC6948_Fref_Hz More... | |
unsigned long | get_LTC6948_global_frf_MHz () |
returns global LTC6948_Frf_MHz More... | |
unsigned long | get_LTC6948_global_frf_Hz () |
returns global LTC6948_Frf_Hz More... | |
unsigned long | LTC6948_calc_odiv (char part_version[], unsigned long frf[2]) |
calculates the output divider setting based on the frf and version of LTC6948 More... | |
void | LTC6948_set_frf (char part_version[]) |
FUNCTION: LTC6948_set_frf Calculates the integer (N), fractional (NUM) and output divider (OD) SPI values using self created 64bit math functions. More... | |
void | prt (unsigned long an[]) |
Prints HEX representation of 64 bit an. More... | |
void | init64 (unsigned long an[], unsigned long bigPart, unsigned long littlePart) |
Creates a equivalent 64 bit number from 2 32 bit numbers. More... | |
void | HZto64 (unsigned long an[], unsigned long MHzPart, unsigned long HzPart) |
create a 64 bit Hz number from 32 bit xxxx MHz number and 32 bit yyy yyy Hz number. More... | |
void | shl64 (unsigned long an[]) |
Single Bit shift left of equivalent 64 bit number (an[] = an[]<<1) More... | |
void | shr64 (unsigned long an[]) |
Single Bit shift right of equivalent 64 bit number (an[] = an[]<<1) More... | |
void | shl64by (unsigned long an[], uint8_t shiftnum) |
Multi Bit shift left of equivalent 64 bit number (an[] = an[]<<shiftnum) More... | |
void | shr64by (unsigned long an[], uint8_t shiftnum) |
Multi Bit shift right of equivalent 64 bit number (an[] = an[]>>shiftnum) More... | |
void | add64 (unsigned long an[], unsigned long ann[]) |
64 bit Add ann to an (an[] = an[] + ann[]) More... | |
void | sub64 (unsigned long an[], unsigned long ann[]) |
64 bit Subtract ann from an (an[] = an[] - ann[]) More... | |
boolean | eq64 (unsigned long an[], unsigned long ann[]) |
64 bit, if an == ann, then true More... | |
boolean | lt64 (unsigned long an[], unsigned long ann[]) |
64 bit, if an < ann, then true More... | |
void | div64 (unsigned long num[], unsigned long den[]) |
64 bit Divide, num=num/div More... | |
void | mul64 (unsigned long an[], unsigned long ann[]) |
64 bit multiply, an=an*ann More... | |
Variables | |
uint8_t | LTC6948_reg [LTC6948_NUM_REGADDR] |
number of LTC6948 spi addresses More... | |
uint8_t | LTC6948_spi_map [(LTC6948_NUM_REGFIELD+1)][4] |
LTC6948 spi map, stores MSB address location, MSB bit location, field length in bits, and R or RW capability. More... | |
unsigned long | LTC6948_Fref_MHz = 100 |
Default Fref frequency - MHz portion (xxx); Fref = xxx, yyy,yyy. More... | |
unsigned long | LTC6948_Fref_Hz = 0 |
Default Fref frequency - Hz portion (yyy,yyy); Fref = x,xxx, yyy,yyy. More... | |
unsigned long | LTC6948_Frf_MHz = 907 |
Default Frf frequency - MHz portion (xxxx); Frf = x,xxx, yyy,yyy. More... | |
unsigned long | LTC6948_Frf_Hz = 0 |
Default Frf frequency - Hz portion (yyy,yyy); Frf = x,xxx, yyy,yyy. More... | |
unsigned long | zero64 [] = {0,0} |
for 64bit math functions More... | |
void add64 | ( | unsigned long | an[], |
unsigned long | ann[] | ||
) |
64 bit Add ann to an (an[] = an[] + ann[])
an | 64 bit number, in 1x2 32bit array |
ann | 64 bit number, in 1x2 32bit array |
Definition at line 917 of file LTC6948.cpp.
void div64 | ( | unsigned long | num[], |
unsigned long | den[] | ||
) |
64 bit Divide, num=num/div
num | numerator: 64 bit number, in 1x2 32bit array |
den | denominator: 64 bit number, in 1x2 32bit array |
Definition at line 966 of file LTC6948.cpp.
boolean eq64 | ( | unsigned long | an[], |
unsigned long | ann[] | ||
) |
64 bit, if an == ann, then true
an | 64 bit number, in 1x2 32bit array |
ann | 64 bit number, in 1x2 32bit array |
Definition at line 945 of file LTC6948.cpp.
unsigned long get_LTC6948_global_fref_Hz | ( | ) |
unsigned long get_LTC6948_global_fref_MHz | ( | ) |
unsigned long get_LTC6948_global_frf_Hz | ( | ) |
unsigned long get_LTC6948_global_frf_MHz | ( | ) |
uint8_t get_LTC6948_REGSIZE | ( | ) |
returns # of addresses in parts register map (array size)
Definition at line 229 of file LTC6948.cpp.
long get_LTC6948_SPI_FIELD | ( | uint8_t | cs, |
uint8_t | f | ||
) |
Gets the LTC6948 SPI field value calls function LTC6948_read_field, which reads specific address locations identifies and returns specific field in question can handle SPI fields in multiple addresses, if MSB bit is in the lower number address.
cs | Chip Select Pin |
f | SPI field number |
Definition at line 151 of file LTC6948.cpp.
uint8_t get_LTC6948_SPI_FIELD_NUMBITS | ( | uint8_t | f | ) |
returns the number of bits for a given field name in the SPI map
f | SPI field number |
Definition at line 239 of file LTC6948.cpp.
uint8_t get_LTC6948_SPI_FIELD_RW | ( | uint8_t | f | ) |
returns if the given field name is (0)read/write or (1)read_only field
f | SPI field number |
Definition at line 249 of file LTC6948.cpp.
void HZto64 | ( | unsigned long | an[], |
unsigned long | MHzPart, | ||
unsigned long | HzPart | ||
) |
create a 64 bit Hz number from 32 bit xxxx MHz number and 32 bit yyy yyy Hz number.
A) if an < 2^32 bits:
B) if an > 2^32 bits (4,294,967,296):
an | 64 bit number, 1x2 32 bit array |
MHzPart | integer in MHZ |
HzPart | integer in Hz |
Definition at line 836 of file LTC6948.cpp.
void init64 | ( | unsigned long | an[], |
unsigned long | bigPart, | ||
unsigned long | littlePart | ||
) |
Creates a equivalent 64 bit number from 2 32 bit numbers.
an | 64 bit number, 1x2 32 bit array |
bigPart | upper 32 bits |
littlePart | lower 32 bits |
Definition at line 819 of file LTC6948.cpp.
boolean lt64 | ( | unsigned long | an[], |
unsigned long | ann[] | ||
) |
64 bit, if an < ann, then true
an | 64 bit number, in 1x2 32bit array |
ann | 64 bit number, in 1x2 32bit array |
Definition at line 955 of file LTC6948.cpp.
unsigned long LTC6948_calc_odiv | ( | char | part_version[], |
unsigned long | frf[2] | ||
) |
calculates the output divider setting based on the frf and version of LTC6948
part_version | LTC6948 part number LTC6948-x |
frf | output frequency |
Definition at line 545 of file LTC6948.cpp.
void LTC6948_init | ( | ) |
Initializes the SPI MAP arrays The values set in initialization are used all the LTC6948 SPI/WRITE and read functions (set_LTC6948_SPI_FIELD, get_LTC6948_SPI_FIELD, LTC6948_read, LTC6948_write, etc, etc)
Definition at line 299 of file LTC6948.cpp.
uint8_t LTC6948_read | ( | uint8_t | cs, |
int8_t | address | ||
) |
LTC6948 Read Single Address reads 8 bit Data field to LTC6948.
has to shift data by one bit to account for RW bit
cs | Chip Select Pin |
address | Register address for the LTC6948. |
Definition at line 95 of file LTC6948.cpp.
long LTC6948_read_field | ( | uint8_t | cs, |
uint8_t | address, | ||
uint8_t | MSB_loc, | ||
uint8_t | numbits | ||
) |
LTC6948 Read Single Field For SPI FIELDS located in 1 or multiple address locations reads specific address locations identifies and returns specific field in question can handle SPI fields in multiple addresses, if MSB bit is in the lower number address.
cs | Chip Select Pin |
address | Register address for the LTC6948. |
MSB_loc | MSB bit location of field |
numbits | length of field (i.e. number of bits in field) |
Definition at line 115 of file LTC6948.cpp.
void LTC6948_set_frf | ( | char | part_version[] | ) |
FUNCTION: LTC6948_set_frf Calculates the integer (N), fractional (NUM) and output divider (OD) SPI values using self created 64bit math functions.
Datasheet equations:
fpfd = fref/R
can be modified to the following equations:
where:
Linduino One (Arduino Uno) is limited to 32 bit floats/double/long. 32 bit math functions will create rounding errors with the above equations, that can result in frequency errors. Therefore, the following code uses self created 64bit functions for 64bit integer math.
R (5 bits)
step 1: create 64 bit frf and fref numbers
step 2: calculate O (output divider)
step 3: get current R-divider setting
step 4: calculate frf*O*R max bit count/resolution: 33b+3b+5b= 41b
step 5: calculate N(10b), using value from step 1 N = (int) frf*O*R/fref max bit count/resolution: 41b-23b = 18b
step 6: calculate NUM (18b)
NUM = (int) [2^18 * (frf*O*R/fref -N)]
to get the correct value the above calculation are performed like this
part_version | LTC6948 part number LTC6948-x |
Definition at line 659 of file LTC6948.cpp.
void LTC6948_write | ( | uint8_t | cs, |
uint8_t | address, | ||
uint8_t | Data | ||
) |
LTC6948 Write Single Address writes 8 bit Data field to LTC6948.
has to shift data by one bit to account for RW bit
cs | Chip Select Pin |
address | Register address for the LTC6948. |
Data | 8-bit data to be written to register |
Definition at line 162 of file LTC6948.cpp.
uint8_t LTC6948_write_field | ( | uint8_t | cs, |
long | field_data, | ||
uint8_t | address, | ||
uint8_t | MSB_loc, | ||
uint8_t | numbits | ||
) |
LTC6948 Write Single Field For SPI FIELDS in 1 or multiple address locations reads specific address/field location then writes to specific field can handle SPI fields in multiple addresses, if MSB bit is in the lower number address.
cs | Chip Select Pin |
field_data | Value field value to be set to |
address | Register address for the LTC6948. |
MSB_loc | MSB bit location of field |
numbits | length of field (i.e. number of bits in field) |
Definition at line 178 of file LTC6948.cpp.
void mul64 | ( | unsigned long | an[], |
unsigned long | ann[] | ||
) |
64 bit multiply, an=an*ann
an | 64 bit number, in 1x2 32bit array |
ann | 64 bit number, in 1x2 32bit array |
Definition at line 1013 of file LTC6948.cpp.
void prt | ( | unsigned long | an[] | ) |
Prints HEX representation of 64 bit an.
an | 64 bit number, in 1x2 32bit array |
Definition at line 805 of file LTC6948.cpp.
void set_LTC6948_ALLREGS | ( | uint8_t | cs, |
uint8_t | reg01, | ||
uint8_t | reg02, | ||
uint8_t | reg03, | ||
uint8_t | reg04, | ||
uint8_t | reg05, | ||
uint8_t | reg06, | ||
uint8_t | reg07, | ||
uint8_t | reg08, | ||
uint8_t | reg09, | ||
uint8_t | reg0A, | ||
uint8_t | reg0B, | ||
uint8_t | reg0C, | ||
uint8_t | reg0D | ||
) |
Writes values to ALL LTC6948 RW address.
cs | Chip Select Pin |
reg01 | LTC6948 register 1 |
reg02 | LTC6948 register 2 |
reg03 | LTC6948 register 3 |
reg04 | LTC6948 register 4 |
reg05 | LTC6948 register 5 |
reg06 | LTC6948 register 6 |
reg07 | LTC6948 register 7 |
reg08 | LTC6948 register 8 |
reg09 | LTC6948 register 9 |
reg0A | LTC6948 register 10 |
reg0B | LTC6948 register 11 |
reg0C | LTC6948 register 12 |
reg0D | LTC6948 register 13 |
Definition at line 272 of file LTC6948.cpp.
void set_LTC6948_global_fref | ( | unsigned long | fref_MHz, |
unsigned long | fref_Hz | ||
) |
sets globals LTC6948_Fref_MHz and LTC6948_Fref_Hz
Definition at line 507 of file LTC6948.cpp.
void set_LTC6948_global_frf | ( | unsigned long | frf_MHz, |
unsigned long | frf_Hz | ||
) |
sets globals LTC6948_Frf_MHz and LTC6948_Frf_Hz
Definition at line 513 of file LTC6948.cpp.
void set_LTC6948_SPI_FIELD | ( | uint8_t | cs, |
uint8_t | f, | ||
long | field_data | ||
) |
Sets the LTC6948 SPI field value calls function LTC6948_read_field, which reads specific address/field location then writes to specific field can handle SPI fields in multiple addresses, if MSB bit is in the lower number address.
cs | Chip Select Pin |
f | SPI field number |
field_data | Value field value to be set to |
Definition at line 262 of file LTC6948.cpp.
void shl64 | ( | unsigned long | an[] | ) |
Single Bit shift left of equivalent 64 bit number (an[] = an[]<<1)
an | an[] = an[]<<1 |
Definition at line 855 of file LTC6948.cpp.
void shl64by | ( | unsigned long | an[], |
uint8_t | shiftnum | ||
) |
Multi Bit shift left of equivalent 64 bit number (an[] = an[]<<shiftnum)
an | an[] = an[]<<shiftnum |
shiftnum | number of bits to shift left |
Definition at line 881 of file LTC6948.cpp.
void shr64 | ( | unsigned long | an[] | ) |
Single Bit shift right of equivalent 64 bit number (an[] = an[]<<1)
an | an[] = an[]>>shiftnum |
Definition at line 868 of file LTC6948.cpp.
void shr64by | ( | unsigned long | an[], |
uint8_t | shiftnum | ||
) |
Multi Bit shift right of equivalent 64 bit number (an[] = an[]>>shiftnum)
an | an[] = an[]>>shiftnum |
shiftnum | number of bits to shift right |
Definition at line 899 of file LTC6948.cpp.
void sub64 | ( | unsigned long | an[], |
unsigned long | ann[] | ||
) |
64 bit Subtract ann from an (an[] = an[] - ann[])
an | 64 bit number, in 1x2 32bit array |
ann | 64 bit number, in 1x2 32bit array |
Definition at line 930 of file LTC6948.cpp.
unsigned long LTC6948_Fref_Hz = 0 |
Default Fref frequency - Hz portion (yyy,yyy); Fref = x,xxx, yyy,yyy.
Definition at line 84 of file LTC6948.cpp.
unsigned long LTC6948_Fref_MHz = 100 |
Default Fref frequency - MHz portion (xxx); Fref = xxx, yyy,yyy.
Definition at line 83 of file LTC6948.cpp.
unsigned long LTC6948_Frf_Hz = 0 |
Default Frf frequency - Hz portion (yyy,yyy); Frf = x,xxx, yyy,yyy.
Definition at line 86 of file LTC6948.cpp.
unsigned long LTC6948_Frf_MHz = 907 |
Default Frf frequency - MHz portion (xxxx); Frf = x,xxx, yyy,yyy.
Definition at line 85 of file LTC6948.cpp.
uint8_t LTC6948_reg[LTC6948_NUM_REGADDR] |
number of LTC6948 spi addresses
Definition at line 80 of file LTC6948.cpp.
uint8_t LTC6948_spi_map[(LTC6948_NUM_REGFIELD+1)][4] |
LTC6948 spi map, stores MSB address location, MSB bit location, field length in bits, and R or RW capability.
Definition at line 81 of file LTC6948.cpp.
unsigned long zero64[] = {0,0} |
for 64bit math functions
Definition at line 88 of file LTC6948.cpp.