Diff: max77756.cpp

Revision:

0:fc290eb62889

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/max77756.cpp	Thu Sep 14 15:02:47 2017 +0000
@@ -0,0 +1,165 @@
+/*******************************************************************************
+ * 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 "max77756.h"
+ 
+/***** Definitions *****/
+#define I2C_ADDR            (0x1E<<1)
+ 
+//******************************************************************************
+MAX77756::MAX77756(PinName sda, PinName scl)
+{
+    i2c_ = new I2C(sda, scl);
+    i2c_owner = true;
+ 
+    i2c_->frequency(400000);
+}
+ 
+//******************************************************************************
+MAX77756::MAX77756(I2C *i2c) :
+    i2c_(i2c)
+{
+    i2c_owner = false;
+}
+ 
+//******************************************************************************
+MAX77756::~MAX77756()
+{
+    if(i2c_owner) {
+        delete i2c_;
+    }
+}
+ 
+//******************************************************************************
+int32_t MAX77756::init()
+{ 
+    return 0;
+}
+ 
+//******************************************************************************
+int32_t MAX77756::writeReg(MAX77756::registers_t reg_addr, char reg_data)
+{
+    char data[2];
+ 
+    data[0] = reg_addr;
+    data[1] = reg_data;
+    if (i2c_->write(I2C_ADDR, data, 2) != 0) {
+        return -1;
+    }
+ 
+    return 0;
+}
+ 
+//******************************************************************************
+int32_t MAX77756::readReg(MAX77756::registers_t reg_addr)
+{
+    char data;
+ 
+    data = reg_addr;
+    if (i2c_->write(I2C_ADDR, &data, 1, true) != 0) {
+        return -1;
+    }
+ 
+    if (i2c_->read(I2C_ADDR | 0x01, &data, 1) != 0) {
+        return -1;
+    }
+ 
+    return (0x0 + data);
+}
+
+//******************************************************************************
+int32_t MAX77756::outEnable(MAX77756::Enable_t enable)
+{
+    int32_t data; 
+    
+    data = readReg(REG_CONFIGA);
+    if (data < 0) {
+        return -1;
+    }
+    
+    data &= (~0x01);
+    data |= (enable & 0x01);
+    
+    data = writeReg(REG_CONFIGA, data & 0xff);
+    if (data < 0) {
+        return -1;
+    }
+    
+    return 0;
+}
+
+//******************************************************************************
+int32_t MAX77756::setVout(uint32_t outVoltage)
+{
+    int32_t data;
+    uint32_t bitVolt; 
+    
+    if (outVoltage < 1500 || outVoltage > 7500) {
+        return -1;
+    }
+    
+    bitVolt = (uint32_t)((outVoltage -1500)/50);
+    data = writeReg(REG_CONFIGB, bitVolt & 0xff);
+    if (data < 0) {
+        return -1;
+    }
+            
+    return 0;
+}
+
+//******************************************************************************
+int32_t MAX77756::config( MAX77756::SpreadSpectrum_t sspectrum, 
+                          MAX77756::SoftStart_t sstart,
+                          MAX77756::PeakCurrent_t ipeak, 
+                          MAX77756::EnableLogic_t enlogic)
+{
+    int32_t data; 
+    int32_t config = 0;
+    
+    data = readReg(REG_CONFIGA);
+    if (data < 0) {
+        return -1;
+    }
+    
+    data &= (~0xF2);
+    config = (sspectrum << 7) | (sstart << 6) | (ipeak << 4) | (enlogic <<1);
+    data |= ( config & 0xF2);
+    
+    data = writeReg(REG_CONFIGA, data & 0xff);
+    if (data < 0) {
+        return -1;
+    }
+    
+    return 0;
+}
+    
+