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Julia Pfitzer 2022-03-13 18:48:04 +01:00 committed by GitHub
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lib/ADF4351/ADF4351.cpp
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@ -1,3 +1,27 @@
/*!
The ADF4351 chip is a wideband freqency synthesizer integrated circuit that can generate frequencies
from 35 MHz to 4.4 GHz. It incorporates a PLL (Fraction-N and Integer-N modes) and VCO, along with
prescalers, dividers and multipiers. The users add a PLL loop filter and reference frequency to
create a frequency generator with a very wide range, that is tuneable in settable frequency steps.
The ADF4351 chip provides an I2C interface for setting the device registers that control the
frequency and output levels, along with several IO pins for gathering chip status and
enabling/disabling output and power modes.
The ADF4351 library provides an Arduino API for accessing the features of the ADF chip.
The basic PLL equations for the ADF4351 are:
\f$ RF_{out} = f_{PFD} \times (INT +(\frac{FRAC}{MOD})) \f$
where:
\f$ f_{PFD} = REF_{IN} \times \left[ \frac{(1 + D)}{( R \times (1 + T))} \right] \f$
\f$ D = \textrm{RD2refdouble, ref doubler flag}\f$
\f$ R = \textrm{RCounter, ref divider}\f$
\f$ T = \textrm{RD1Rdiv2, ref divide by 2 flag}\f$
This library uses the BigNumber library (included) from Nick Gammon
Modified by J. Pfitzer from David Fannin (https://github.com/dfannin/adf4351), KK6DF for usage with an ESP32 board
MIT License
*/
#include "ADF4351.h"
#define ADF_FREQ_MAX 4294967295UL ///< Maximum Generated Frequency = value of MAX Unsigned Long
@ -277,32 +301,6 @@ int ADF4351::setrf(uint32_t f)
// write data into register
void ADF4351::WriteRegister(uint32_t regData){
/*digitalWrite(_le, LOW);
_regData = regData;
for(int i=0; i<32; i++)
{
if(((_regData<<i)&0x80000000)==0x80000000)
{
digitalWrite(_data,1);
}
else
{
digitalWrite(_data,0) ;
}
digitalWrite(_sclk, HIGH);
delay(1);
digitalWrite(_sclk, LOW);
}
// load data into register
digitalWrite(_le, HIGH);
delay(1);
digitalWrite(_le, LOW);*/
byte txbyte ;
digitalWrite(_le, LOW) ;