Diff: MAX2871.cpp

Revision:

0:9f09f1b58389

Child:

1:40b397b31d13

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX2871.cpp	Mon Jul 31 18:40:54 2017 +0000
@@ -0,0 +1,137 @@
+/*******************************************************************************
+ * 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)
+{
+    f_reference = 50.0;
+    
+    reg0.all = 0x007d0000;
+    reg1.all = 0x2000fff9;
+    reg2.all = 0x00004042;
+    reg3.all = 0x0000000b;
+    reg4.all = 0x6180b23c;
+    reg5.all = 0x00400005;
+    reg6.all = 0x00000000;
+    update();
+}
+
+//****************************************************************************
+MAX2871::~MAX2871()
+{
+    //empty block
+}
+
+//****************************************************************************    
+void MAX2871::writeRegister(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::readRegister6()
+{
+    uint32_t raw, reg6read;
+    
+    reg5.bits.mux = 1;
+    reg2.bits.mux = 0x4;
+    writeRegister(reg5.all);
+    writeRegister(reg2.all);
+    
+    writeRegister(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);
+    raw = m_spiBus.write(0x00);
+    reg6read = (reg6read & 0xFFFFFFFE) + (raw >> 7);
+    reg6.all = reg6read;
+    
+    m_spiBus.format(8,0);
+}
+
+//****************************************************************************    
+void MAX2871::update()
+{
+    writeRegister(reg5.all);
+    writeRegister(reg4.all);
+    writeRegister(reg3.all);
+    writeRegister(reg2.all);
+    writeRegister(reg1.all);
+    writeRegister(reg0.all);
+}
+
+//****************************************************************************    
+void MAX2871::frequency(const float freq)
+{
+    uint32_t n,frac,m = 0;
+    float pll_coefficient;
+    
+    float f_pfd = f_reference*(1+reg2.bits.dbr)/(reg2.bits.r*(1+reg2.bits.rdiv2));
+    
+    reg4.bits.diva = 0;
+    while(freq*powf(2,reg4.bits.diva) < 3000.0)
+    {
+        reg4.bits.diva = reg4.bits.diva + 1;
+    }
+    pll_coefficient = freq*powf(2,reg4.bits.diva)/f_pfd;
+    
+    n = floor(pll_coefficient);
+    pll_coefficient = pll_coefficient - n;
+    
+    m = 2500;
+    frac = roundf(m*pll_coefficient);
+    
+    reg0.bits.frac = frac;
+    reg0.bits.n = n;
+    reg1.bits.m = m;
+    update();
+}