File content as of revision 0:ff4818eff240:

/*******************************************************************************
 * 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
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 * 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
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 *******************************************************************************
 */


#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;
}