The MAX20303 is a highly integrated and programmable power management solution designed for ultra-low-power wearable applications.
Dependents: MAX20303_Wearable_PMIC_Activity_Tracker MAX20303_Wearable_PMIC_Activity_Tracker
MAX20303 Wearable PMIC
Diff: MAX20303.cpp
- Revision:
- 0:ff4818eff240
- Child:
- 1:0333f77c665f
diff -r 000000000000 -r ff4818eff240 MAX20303.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MAX20303.cpp Fri Jan 19 15:47:44 2018 -0800 @@ -0,0 +1,160 @@ +/******************************************************************************* + * Copyright (C) 2018 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 "MAX20303.h" +#include "Peripherals.h" + + +//****************************************************************************** +MAX20303::MAX20303(I2C *i2c): + m_i2c(i2c), m_writeAddress(MAX20303_SLAVE_WR_ADDR), + m_readAddress(MAX20303_SLAVE_RD_ADDR) +{ +} + + +//****************************************************************************** +MAX20303::~MAX20303(void) +{ + //empty block +} + + +//****************************************************************************** +int MAX20303::LDO1Config() +{ + int32_t ret = 0; + uint8_t val; + ret |= writeReg(MAX20303::REG_AP_CMDOUT, 0x40); + ret |= writeReg(MAX20303::REG_AP_DATOUT0, 0x05); + ret |= writeReg(MAX20303::REG_AP_DATOUT1, 0x34); + + readReg(MAX20303::REG_AP_CMDOUT, val); + readReg(MAX20303::REG_AP_DATOUT0, val); + readReg(MAX20303::REG_AP_DATOUT1, val); + + return ret; +} + +//****************************************************************************** +int MAX20303::writeReg(registers_t reg, uint8_t value) +{ + int32_t ret; + + char cmdData[2] = {reg, value}; + + ret = m_i2c->write(m_writeAddress, cmdData, sizeof(cmdData)); + //printf("MAX20303 write reg[0x%X]=0x%X, ret=%d\r\n", (uint32_t)reg, value, ret) + + if (ret != 0) + return MAX20303_ERROR; + + return MAX20303_NO_ERROR; +} + + +//****************************************************************************** +int MAX20303::readReg(registers_t reg, uint8_t &value) +{ + int32_t ret; + + char data = reg; + + ret = m_i2c->write(m_writeAddress, &data, sizeof(data)); + if (ret != 0) { + printf("%s - failed - ret: %d\n", __func__); + return MAX20303_ERROR; + } + + ret = m_i2c->read(m_readAddress, &data, sizeof(data)); + if (ret != 0) { + printf("%s - failed - ret: %d\n", __func__); + return MAX20303_ERROR; + } + + value = data; + printf("MAX20303 read reg[0x%X]=0x%X, ret=%d\r\n", (uint32_t)reg, value, ret); + return MAX20303_NO_ERROR; +} + + +//****************************************************************************** +int MAX20303::mv2bits(int mV) +{ + int regBits; + + if (( MAX20303_LDO_MIN_MV <= mV) && (mV <= MAX20303_LDO_MAX_MV)) { + regBits = (mV - MAX20303_LDO_MIN_MV) / MAX20303_LDO_STEP_MV; + } else { + return -1; + } + + return regBits; +} + +int MAX20303::led0on(void) { + + writeReg(REG_LED0_DIRECT, 0x21); + + return MAX20303_NO_ERROR; +} + +int MAX20303::BoostEnable(void) { + + writeReg(REG_AP_CMDOUT, 0x30); + writeReg(REG_AP_DATOUT3, 0x00); // 00 : 5V + writeReg(REG_AP_DATOUT0, 0x01); // Boost Enabled + + return MAX20303_NO_ERROR; +} + +int MAX20303::BuckBoostEnable(void) +{ + int ret = 0; + + ret |= writeReg( REG_AP_DATOUT0, 0x00); // Reserved = 0x00 + ret |= writeReg( REG_AP_DATOUT1, 0x04); // BBstlSet = 0b'100 Buck Boost Peak current Limit = 200mA + ret |= writeReg( REG_AP_DATOUT2, 0x19); // BBstVSet = 0b'11001 Buck Boost Output Voltage = 5V + ret |= writeReg( REG_AP_DATOUT3, 0x01); // BBstRipRed = 1 Ripple Reduction + // BBstAct = 1 Actively discharged in Hard-Reset or Enable Low + // BBstPas = 1 Passively discharged in Hard-Reset or Enable Low + // BBstMd = 1 Damping Enabled + // BBstInd = 0 Inductance is 4.7uH + // BBstEn = 0b'01 Enabled + ret |= writeReg( REG_AP_CMDOUT, 0x70); + if (ret != 0) + return MAX20303_ERROR; + + return MAX20303_NO_ERROR; +}