Maxim Integrated / max77756

Library for MAX77756. The MAX77756 is a synchronous 500mA step-down DC-DC converter with integrated dual-input power multiplexer(MUX).

Dependents:   MAX77756_Demo

Fork of max77756 by Daniel Geonsi Jeong

max77756.cpp@0:fc290eb62889, 2017-09-14 (annotated)

Committer:
daniel_gs_jeong
Date:
Thu Sep 14 15:02:47 2017 +0000
Revision:
0:fc290eb62889
Initial Version of MAX77756 Library;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
daniel_gs_jeong 0:fc290eb62889 1 /*******************************************************************************
daniel_gs_jeong 0:fc290eb62889 2 * Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved.
daniel_gs_jeong 0:fc290eb62889 3 *
daniel_gs_jeong 0:fc290eb62889 4 * Permission is hereby granted, free of charge, to any person obtaining a
daniel_gs_jeong 0:fc290eb62889 5 * copy of this software and associated documentation files (the "Software"),
daniel_gs_jeong 0:fc290eb62889 6 * to deal in the Software without restriction, including without limitation
daniel_gs_jeong 0:fc290eb62889 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
daniel_gs_jeong 0:fc290eb62889 8 * and/or sell copies of the Software, and to permit persons to whom the
daniel_gs_jeong 0:fc290eb62889 9 * Software is furnished to do so, subject to the following conditions:
daniel_gs_jeong 0:fc290eb62889 10 *
daniel_gs_jeong 0:fc290eb62889 11 * The above copyright notice and this permission notice shall be included
daniel_gs_jeong 0:fc290eb62889 12 * in all copies or substantial portions of the Software.
daniel_gs_jeong 0:fc290eb62889 13 *
daniel_gs_jeong 0:fc290eb62889 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
daniel_gs_jeong 0:fc290eb62889 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
daniel_gs_jeong 0:fc290eb62889 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
daniel_gs_jeong 0:fc290eb62889 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
daniel_gs_jeong 0:fc290eb62889 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
daniel_gs_jeong 0:fc290eb62889 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
daniel_gs_jeong 0:fc290eb62889 20 * OTHER DEALINGS IN THE SOFTWARE.
daniel_gs_jeong 0:fc290eb62889 21 *
daniel_gs_jeong 0:fc290eb62889 22 * Except as contained in this notice, the name of Maxim Integrated
daniel_gs_jeong 0:fc290eb62889 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
daniel_gs_jeong 0:fc290eb62889 24 * Products, Inc. Branding Policy.
daniel_gs_jeong 0:fc290eb62889 25 *
daniel_gs_jeong 0:fc290eb62889 26 * The mere transfer of this software does not imply any licenses
daniel_gs_jeong 0:fc290eb62889 27 * of trade secrets, proprietary technology, copyrights, patents,
daniel_gs_jeong 0:fc290eb62889 28 * trademarks, maskwork rights, or any other form of intellectual
daniel_gs_jeong 0:fc290eb62889 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
daniel_gs_jeong 0:fc290eb62889 30 * ownership rights.
daniel_gs_jeong 0:fc290eb62889 31 *******************************************************************************
daniel_gs_jeong 0:fc290eb62889 32 */
daniel_gs_jeong 0:fc290eb62889 33 #include "max77756.h"
daniel_gs_jeong 0:fc290eb62889 34
daniel_gs_jeong 0:fc290eb62889 35 /***** Definitions *****/
daniel_gs_jeong 0:fc290eb62889 36 #define I2C_ADDR (0x1E<<1)
daniel_gs_jeong 0:fc290eb62889 37
daniel_gs_jeong 0:fc290eb62889 38 //******************************************************************************
daniel_gs_jeong 0:fc290eb62889 39 MAX77756::MAX77756(PinName sda, PinName scl)
daniel_gs_jeong 0:fc290eb62889 40 {
daniel_gs_jeong 0:fc290eb62889 41 i2c_ = new I2C(sda, scl);
daniel_gs_jeong 0:fc290eb62889 42 i2c_owner = true;
daniel_gs_jeong 0:fc290eb62889 43
daniel_gs_jeong 0:fc290eb62889 44 i2c_->frequency(400000);
daniel_gs_jeong 0:fc290eb62889 45 }
daniel_gs_jeong 0:fc290eb62889 46
daniel_gs_jeong 0:fc290eb62889 47 //******************************************************************************
daniel_gs_jeong 0:fc290eb62889 48 MAX77756::MAX77756(I2C *i2c) :
daniel_gs_jeong 0:fc290eb62889 49 i2c_(i2c)
daniel_gs_jeong 0:fc290eb62889 50 {
daniel_gs_jeong 0:fc290eb62889 51 i2c_owner = false;
daniel_gs_jeong 0:fc290eb62889 52 }
daniel_gs_jeong 0:fc290eb62889 53
daniel_gs_jeong 0:fc290eb62889 54 //******************************************************************************
daniel_gs_jeong 0:fc290eb62889 55 MAX77756::~MAX77756()
daniel_gs_jeong 0:fc290eb62889 56 {
daniel_gs_jeong 0:fc290eb62889 57 if(i2c_owner) {
daniel_gs_jeong 0:fc290eb62889 58 delete i2c_;
daniel_gs_jeong 0:fc290eb62889 59 }
daniel_gs_jeong 0:fc290eb62889 60 }
daniel_gs_jeong 0:fc290eb62889 61
daniel_gs_jeong 0:fc290eb62889 62 //******************************************************************************
daniel_gs_jeong 0:fc290eb62889 63 int32_t MAX77756::init()
daniel_gs_jeong 0:fc290eb62889 64 {
daniel_gs_jeong 0:fc290eb62889 65 return 0;
daniel_gs_jeong 0:fc290eb62889 66 }
daniel_gs_jeong 0:fc290eb62889 67
daniel_gs_jeong 0:fc290eb62889 68 //******************************************************************************
daniel_gs_jeong 0:fc290eb62889 69 int32_t MAX77756::writeReg(MAX77756::registers_t reg_addr, char reg_data)
daniel_gs_jeong 0:fc290eb62889 70 {
daniel_gs_jeong 0:fc290eb62889 71 char data[2];
daniel_gs_jeong 0:fc290eb62889 72
daniel_gs_jeong 0:fc290eb62889 73 data[0] = reg_addr;
daniel_gs_jeong 0:fc290eb62889 74 data[1] = reg_data;
daniel_gs_jeong 0:fc290eb62889 75 if (i2c_->write(I2C_ADDR, data, 2) != 0) {
daniel_gs_jeong 0:fc290eb62889 76 return -1;
daniel_gs_jeong 0:fc290eb62889 77 }
daniel_gs_jeong 0:fc290eb62889 78
daniel_gs_jeong 0:fc290eb62889 79 return 0;
daniel_gs_jeong 0:fc290eb62889 80 }
daniel_gs_jeong 0:fc290eb62889 81
daniel_gs_jeong 0:fc290eb62889 82 //******************************************************************************
daniel_gs_jeong 0:fc290eb62889 83 int32_t MAX77756::readReg(MAX77756::registers_t reg_addr)
daniel_gs_jeong 0:fc290eb62889 84 {
daniel_gs_jeong 0:fc290eb62889 85 char data;
daniel_gs_jeong 0:fc290eb62889 86
daniel_gs_jeong 0:fc290eb62889 87 data = reg_addr;
daniel_gs_jeong 0:fc290eb62889 88 if (i2c_->write(I2C_ADDR, &data, 1, true) != 0) {
daniel_gs_jeong 0:fc290eb62889 89 return -1;
daniel_gs_jeong 0:fc290eb62889 90 }
daniel_gs_jeong 0:fc290eb62889 91
daniel_gs_jeong 0:fc290eb62889 92 if (i2c_->read(I2C_ADDR | 0x01, &data, 1) != 0) {
daniel_gs_jeong 0:fc290eb62889 93 return -1;
daniel_gs_jeong 0:fc290eb62889 94 }
daniel_gs_jeong 0:fc290eb62889 95
daniel_gs_jeong 0:fc290eb62889 96 return (0x0 + data);
daniel_gs_jeong 0:fc290eb62889 97 }
daniel_gs_jeong 0:fc290eb62889 98
daniel_gs_jeong 0:fc290eb62889 99 //******************************************************************************
daniel_gs_jeong 0:fc290eb62889 100 int32_t MAX77756::outEnable(MAX77756::Enable_t enable)
daniel_gs_jeong 0:fc290eb62889 101 {
daniel_gs_jeong 0:fc290eb62889 102 int32_t data;
daniel_gs_jeong 0:fc290eb62889 103
daniel_gs_jeong 0:fc290eb62889 104 data = readReg(REG_CONFIGA);
daniel_gs_jeong 0:fc290eb62889 105 if (data < 0) {
daniel_gs_jeong 0:fc290eb62889 106 return -1;
daniel_gs_jeong 0:fc290eb62889 107 }
daniel_gs_jeong 0:fc290eb62889 108
daniel_gs_jeong 0:fc290eb62889 109 data &= (~0x01);
daniel_gs_jeong 0:fc290eb62889 110 data |= (enable & 0x01);
daniel_gs_jeong 0:fc290eb62889 111
daniel_gs_jeong 0:fc290eb62889 112 data = writeReg(REG_CONFIGA, data & 0xff);
daniel_gs_jeong 0:fc290eb62889 113 if (data < 0) {
daniel_gs_jeong 0:fc290eb62889 114 return -1;
daniel_gs_jeong 0:fc290eb62889 115 }
daniel_gs_jeong 0:fc290eb62889 116
daniel_gs_jeong 0:fc290eb62889 117 return 0;
daniel_gs_jeong 0:fc290eb62889 118 }
daniel_gs_jeong 0:fc290eb62889 119
daniel_gs_jeong 0:fc290eb62889 120 //******************************************************************************
daniel_gs_jeong 0:fc290eb62889 121 int32_t MAX77756::setVout(uint32_t outVoltage)
daniel_gs_jeong 0:fc290eb62889 122 {
daniel_gs_jeong 0:fc290eb62889 123 int32_t data;
daniel_gs_jeong 0:fc290eb62889 124 uint32_t bitVolt;
daniel_gs_jeong 0:fc290eb62889 125
daniel_gs_jeong 0:fc290eb62889 126 if (outVoltage < 1500 || outVoltage > 7500) {
daniel_gs_jeong 0:fc290eb62889 127 return -1;
daniel_gs_jeong 0:fc290eb62889 128 }
daniel_gs_jeong 0:fc290eb62889 129
daniel_gs_jeong 0:fc290eb62889 130 bitVolt = (uint32_t)((outVoltage -1500)/50);
daniel_gs_jeong 0:fc290eb62889 131 data = writeReg(REG_CONFIGB, bitVolt & 0xff);
daniel_gs_jeong 0:fc290eb62889 132 if (data < 0) {
daniel_gs_jeong 0:fc290eb62889 133 return -1;
daniel_gs_jeong 0:fc290eb62889 134 }
daniel_gs_jeong 0:fc290eb62889 135
daniel_gs_jeong 0:fc290eb62889 136 return 0;
daniel_gs_jeong 0:fc290eb62889 137 }
daniel_gs_jeong 0:fc290eb62889 138
daniel_gs_jeong 0:fc290eb62889 139 //******************************************************************************
daniel_gs_jeong 0:fc290eb62889 140 int32_t MAX77756::config( MAX77756::SpreadSpectrum_t sspectrum,
daniel_gs_jeong 0:fc290eb62889 141 MAX77756::SoftStart_t sstart,
daniel_gs_jeong 0:fc290eb62889 142 MAX77756::PeakCurrent_t ipeak,
daniel_gs_jeong 0:fc290eb62889 143 MAX77756::EnableLogic_t enlogic)
daniel_gs_jeong 0:fc290eb62889 144 {
daniel_gs_jeong 0:fc290eb62889 145 int32_t data;
daniel_gs_jeong 0:fc290eb62889 146 int32_t config = 0;
daniel_gs_jeong 0:fc290eb62889 147
daniel_gs_jeong 0:fc290eb62889 148 data = readReg(REG_CONFIGA);
daniel_gs_jeong 0:fc290eb62889 149 if (data < 0) {
daniel_gs_jeong 0:fc290eb62889 150 return -1;
daniel_gs_jeong 0:fc290eb62889 151 }
daniel_gs_jeong 0:fc290eb62889 152
daniel_gs_jeong 0:fc290eb62889 153 data &= (~0xF2);
daniel_gs_jeong 0:fc290eb62889 154 config = (sspectrum << 7) | (sstart << 6) | (ipeak << 4) | (enlogic <<1);
daniel_gs_jeong 0:fc290eb62889 155 data |= ( config & 0xF2);
daniel_gs_jeong 0:fc290eb62889 156
daniel_gs_jeong 0:fc290eb62889 157 data = writeReg(REG_CONFIGA, data & 0xff);
daniel_gs_jeong 0:fc290eb62889 158 if (data < 0) {
daniel_gs_jeong 0:fc290eb62889 159 return -1;
daniel_gs_jeong 0:fc290eb62889 160 }
daniel_gs_jeong 0:fc290eb62889 161
daniel_gs_jeong 0:fc290eb62889 162 return 0;
daniel_gs_jeong 0:fc290eb62889 163 }
daniel_gs_jeong 0:fc290eb62889 164
daniel_gs_jeong 0:fc290eb62889 165