MAX8971 1-Cell LI+ DC-DC Charger Driver. Datasheet is available at https://datasheets.maximintegrated.com/en/ds/MAX8971.pdf. And it was tested using MAX32630FTHR Board.
Fork of max77801 by
max77801.cpp
- Committer:
- daniel_gs_jeong
- Date:
- 2017-11-20
- Revision:
- 0:b9790d4a35fd
File content as of revision 0:b9790d4a35fd:
/******************************************************************************* * 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 "max77801.h" /***** Definitions *****/ #define I2C_ADDR (0x18<<1) /** * MAX77801 constructor. * * @param i2c I2C object to use. */ MAX77801::MAX77801(I2C *i2c) : i2c_(i2c) { i2c_owner = false; } /** * MAX77801 destructor. */ MAX77801::~MAX77801() { if(i2c_owner) { delete i2c_; } } /** * @brief Initialize MAX77801 */ int32_t MAX77801::init() { int32_t data; data = write_register(REG_CONFIG1, 0x0E); if(data < 0) return -1; data = write_register(REG_CONFIG2, 0x70); if(data < 0) return -1; return 0; } /** * @brief Read Register * @details Reads data from MAX77801 register * * @param reg_addr Register to read * @returns data if no errors, -1 if error. */ int32_t MAX77801::read_register(MAX77801::registers_t reg_no) { char data; data = reg_no; 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); } /** * @brief Write Register * @details Writes data to MAX77756 register * * @param reg_addr Register to write * @param reg_data Data to write * @returns 0 if no errors, -1 if error. */ int32_t MAX77801::write_register(MAX77801::registers_t reg_no, char reg_data) { char data[2]; data[0] = reg_no; data[1] = reg_data; if (i2c_->write(I2C_ADDR, data, 2) != 0) { return -1; } return 0; } /** * @brief Update Register data * @details Update bits data of a register * * @param reg_no Register Number to be updated * @param mask Mask Data * @param reg_data bit data * @returns 0 if no errors, -1 if error. */ int32_t MAX77801::update_register (MAX77801::registers_t reg_no, char reg_mask, char reg_data) { int32_t data; data = read_register(reg_no); if(data < 0) return -1; data &= ~reg_mask; data |= reg_data; data = write_register(reg_no, (char)(data & 0xff)); if(data < 0) return -1; return 0; } /** * @brief Get version info * @details 0 : Plain * * @param None * @returns version info. */ char* MAX77801::get_version() { int32_t data; data = read_register(REG_DEVICE_ID); switch ((data >> 3) & 0xf) { case 0x0: return "PLAIN"; case 0x1: return "-1Z"; case 0x2: return "-2Z"; } return "UNKNOWN"; } /** * @brief Get revision info * @details 0x1 : PASS1 * 0x2 : PASS2 * 0x3 : PASS3 * @param None * @returns revision info. */ char* MAX77801::get_revision() { int32_t data; data = read_register(REG_DEVICE_ID); switch(data & 0x7) { case 0x0: return "PASS1"; case 0x1: return "PASS2"; case 0x2: return "PASS3"; } return "UNKNOWN"; } /** * @brief Get status * @details Get status register data * BIT3 : Junction Temperature info * BIT2 : Buck Boost POK Status * BIT1 : Buck Boost OVP Status * BIT0 : Buck Boost OCP Status * @param None * @returns status register data. */ int32_t MAX77801::get_status() { int32_t data; data = read_register(REG_DEVICE_ID); if(data < 0) return -1; return (data & 0x0f); } /** * @brief config enable bit * @details Set a Config bit controlled using enabled/disabled * @param config : config bit * @param en : enable/disable * @returns 0 if no errors, -1 if error. */ int32_t MAX77801::config_enable(MAX77801::config_enabled_t config, MAX77801::enable_t en) { int32_t data; switch(config) { case ACTIVE_DISCHARGE: data = update_register(REG_CONFIG1, 0x02, ((char)en) <<1); break; case FORCED_PWM: data = update_register(REG_CONFIG1, 0x01, ((char)en) <<0); break; case BUCK_BOOST_OUTPUT: data = update_register(REG_CONFIG2, 0x40, ((char)en) <<6); break; case EN_PULL_DOWN: data = update_register(REG_CONFIG2, 0x20, ((char)en) <<5); break; default: return -1; } if(data < 0) return -1; return 0; } /** * @brief Config Ramp Up * @details Set BB_RU_SR * * @param config : config value * @returns 0 if no errors, -1 if error. */ int32_t MAX77801::config_ramp_up(MAX77801::ramp_up_rate_t config) { int32_t data; data = update_register(REG_CONFIG1, 0x20, ((char)config) <<5); if(data < 0) return -1; return 0; } /** * @brief Config Ramp Down * @details Set BB_RD_SR * * @param config : config value * @returns 0 if no errors, -1 if error. */ int32_t MAX77801::config_ramp_down(MAX77801::ramp_dn_rate_t config) { int32_t data; data = update_register(REG_CONFIG1, 0x10, ((char)config) <<4); if(data < 0) return -1; return 0; } /** * @brief Config OVP Threshold * @details Set BB_OVP_TH bits * * @param config : config value * @returns 0 if no errors, -1 if error. */ int32_t MAX77801::config_ovp_threshold(MAX77801::output_ovp_threshold_t config) { int32_t data; data = update_register(REG_CONFIG1, 0x0C, ((char)config) <<2); if(data < 0) return -1; return 0; } /** * @brief config pokpol active bit * @details Set POK_POL Bit * * @param lowHigh : active value * @returns 0 if no errors, -1 if error. */ int32_t MAX77801::config_pokpol_active(MAX77801::low_high_t lowHigh) { int32_t data; data = update_register(REG_CONFIG2, 0x10, ((char)lowHigh) <<4); if(data < 0) return -1; return 0; } /** * @brief Set VOUT Voltage when DVS = Low * @details Set Vout Voltage * * @param vout level from 2.6000V ~ 4.1875V with 0.0125V step * @returns 0 if no errors, -1 if error. */ int32_t MAX77801::set_vout(double level, MAX77801::low_high_t dvs) { int32_t ret_val = 0; char reg_data = 0; if(level < 2.6000 || level > 4.1875) return -1; reg_data = (char)((level-2.6000)*80); if(dvs == VAL_LOW) ret_val = write_register(REG_VOUT_DVS_L,reg_data); else ret_val = write_register(REG_VOUT_DVS_H,reg_data); if(ret_val < 0) return -1; return 0; }