First version of the MAX2871 shield library. Includes demo program with terminal for setting frequency on channel A.
Dependents: MAX2871-Synthesizer
Fork of MAX2871_Shield_MAXREFDES161 by
MAX2871.cpp
- Committer:
- MI
- Date:
- 2018-01-09
- Revision:
- 2:b47819dab536
- Parent:
- 1:40b397b31d13
File content as of revision 2:b47819dab536:
/******************************************************************************* * Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name of Maxim Integrated * Products, Inc. shall not be used except as stated in the Maxim Integrated * Products, Inc. Branding Policy. * * The mere transfer of this software does not imply any licenses * of trade secrets, proprietary technology, copyrights, patents, * trademarks, maskwork rights, or any other form of intellectual * property whatsoever. Maxim Integrated Products, Inc. retains all * ownership rights. ******************************************************************************* */ #include "MAX2871.h" #include <math.h> #include <stdio.h> //**************************************************************************** MAX2871::MAX2871(SPI &spiBus, PinName le): m_spiBus(spiBus), m_le(le, 1) { reg0.all = 0x007d0000; reg1.all = 0x2000fff9; reg2.all = 0x00004042; reg3.all = 0x0000000b; reg4.all = 0x6180b23c; reg5.all = 0x00400005; reg6.all = 0x00000000; updateAll(); wait_ms(20); updateAll(); } //**************************************************************************** MAX2871::~MAX2871() { //empty block } //**************************************************************************** void MAX2871::write(const uint32_t data) { m_le = 0; m_spiBus.write((0xFF000000 & data) >> 24); m_spiBus.write((0x00FF0000 & data) >> 16); m_spiBus.write((0x0000FF00 & data) >> 8); m_spiBus.write( 0x000000FF & data); m_le = 1; } //**************************************************************************** void MAX2871::updateAll() { write(reg5.all); write(reg4.all); write(reg3.all); write(reg2.all); write(reg1.all); write(reg0.all); } //**************************************************************************** uint32_t MAX2871::readRegister6() { uint32_t raw, reg6read; reg5.bits.mux = 1; reg2.bits.mux = 0x4; write(reg5.all); write(reg2.all); write(0x00000006); m_spiBus.format(8,1); raw = m_spiBus.write(0x00); reg6read = (reg6read & 0x01FFFFF) + (raw << 25); raw = m_spiBus.write(0x00); reg6read = (reg6read & 0xFE01FFFF) + (raw << 17); raw = m_spiBus.write(0x00); reg6read = (reg6read & 0xFFFE01FF) + (raw << 9); raw = m_spiBus.write(0x00); reg6read = (reg6read & 0xFFFFFE01) + (raw << 1); m_spiBus.write(0x00); m_spiBus.format(8,0); return reg6read; } //**************************************************************************** void MAX2871::setRFOUTA(const double freq) { uint32_t n,frac,m,diva = 0; double pll_coefficient,fractional = 0; double f_pfd = getPFD(); while(freq*powf(2,diva) < 3000.0) { diva = diva + 1; } pll_coefficient = freq*powf(2,diva)/f_pfd; n = floor(pll_coefficient); fractional = pll_coefficient - n; m = 4000; frac = rint(m*fractional); reg0.bits.frac = frac; reg0.bits.n = n; reg1.bits.m = m; reg4.bits.diva = diva; reg3.bits.mutedel = 1; updateAll(); f_rfouta = f_pfd*(reg0.bits.n+1.0*reg0.bits.frac/reg1.bits.m)/powf(2,reg4.bits.diva); } void MAX2871::setPFD(const double ref_in,const uint16_t rdiv) { f_pfd = ref_in/rdiv; if(f_pfd > 32.0) reg2.bits.lds = 1; else reg2.bits.lds = 0; reg3.bits.cdiv = rint(f_pfd/0.10); reg2.bits.dbr = 0; reg2.bits.rdiv2 = 0; reg2.bits.r = rdiv; uint32_t bs = f_pfd*20; if (bs > 1023) bs = 1023; else if (bs < 1) bs = 1; reg4.bits.bs = 0x03FF & bs; reg4.bits.bs2 = 0x03 & (bs >> 8); updateAll(); } double MAX2871::readADC() { reg5.bits.adcm = 0x4; reg5.bits.adcs = 1; write(reg5.all); wait_us(100); reg6.all = readRegister6(); reg5.bits.adcm = 0; reg5.bits.adcs = 0; write(reg5.all); if((reg6.bits.vasa == 0) & (reg6.bits.adcv = 1)) { double volts = 0.315 + 0.0165*(double)reg6.bits.adc; return volts; } else return -1; } uint32_t MAX2871::readVCO() { reg6.all = readRegister6(); return reg6.bits.v; } void MAX2871::powerOn(const bool pwr) { reg2.bits.shdn = !pwr; reg4.bits.sdldo = !pwr; reg4.bits.sddiv = !pwr; reg4.bits.sdref = !pwr; reg4.bits.sdvco = !pwr; reg5.bits.sdpll = !pwr; updateAll(); } double MAX2871::getPFD() { return f_pfd; } double MAX2871::getRFOUTA() { f_rfouta = f_pfd*(reg0.bits.n+1.0*reg0.bits.frac/reg1.bits.m)/powf(2,reg4.bits.diva); return f_rfouta; } double MAX2871::readTEMP() { reg5.bits.adcm = 0x1; reg5.bits.adcs = 1; write(reg5.all); wait_us(100); reg6.all = readRegister6(); reg5.bits.adcm = 0; reg5.bits.adcs = 0; write(reg5.all); if(reg6.bits.adcv == 1) { double degrees = 95 - 1.14*(double)reg6.bits.adc; return degrees; } else return -1; }