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
Revision 1:96e05ce748c1, committed 2018-06-26
- Comitter:
- daniel_gs_jeong
- Date:
- Tue Jun 26 08:05:21 2018 +0000
- Parent:
- 0:b9790d4a35fd
- Commit message:
- MAX8971 1-Cell Li+ DC-DC Charger Driver. This Driver was tested using MAX32630FTHR Board.
Changed in this revision
--- a/max77801.cpp Mon Nov 20 14:57:49 2017 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,347 +0,0 @@ -/******************************************************************************* - * 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; -} -
--- a/max77801.h Mon Nov 20 14:57:49 2017 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,262 +0,0 @@ -/******************************************************************************* - * 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. - ******************************************************************************* - */ -#ifndef _MAX77801_H_ -#define _MAX77801_H_ - -#include "mbed.h" - -class MAX77801 -{ - -public: - - /** - * @brief Register Addresses - * @details Enumerated MAX77801 register addresses - */ - typedef enum { - REG_DEVICE_ID = 0x00, - REG_STATUS, - REG_CONFIG1, - REG_CONFIG2, - REG_VOUT_DVS_L, - REG_VOUT_DVS_H - } registers_t; - - /** - * @brief ENABLE/DISABLE - * @details Enumerated ENABLE/DISABLE - */ - typedef enum { - VAL_DISABLE = 0x00, - VAL_ENABLE - } enable_t; - - /** - * @brief Config Enabled - * @details Enumerated Configs set by ENABLE/DISABLE - */ - typedef enum { - ACTIVE_DISCHARGE = 0x00, - FORCED_PWM, - BUCK_BOOST_OUTPUT, - EN_PULL_DOWN - } config_enabled_t; - - /** - * @brief LOW/HIGH - * @details Enumerated LOW/HIGH - */ - typedef enum { - VAL_LOW = 0x00, - VAL_HIGH - } low_high_t; - - /** - * @brief POLLING ACTIVE LEVEL - * @details Enumerated POLLING ACTIVE LEVEL - */ - typedef enum { - POLL_ACTIVE_LOW = 0x00, - POLL_ACTIVE_HIGH - } poll_level_t; - - /** - * @brief Buck Boost Ramp-Up Slew Rate - * @details Enumerated Buck Boost Rising-Up Slew Rate - */ - typedef enum { - RU_SR_12P5_MV_PER_US = 0x00, - RU_SR_25P0_MV_PER_US - } ramp_up_rate_t; - - /** - * @brief Buck Boost Ramp-Down Slew Rate - * @details Enumerated Buck Boost Rising-Down Slew Rate - */ - typedef enum { - RD_SR_3P125_MV_PER_US = 0x00, - RD_SR_6P250_MV_PER_US - } ramp_dn_rate_t; - - /** - * @brief OUTPUT OVP Threshold - * @details Enumerated OUTPUT OVP Threshold - */ - typedef enum { - OUTPUT_THRESH_NO_OVP = 0x00, - OUTPUT_THRESH_110_PERCENT_OVP, - OUTPUT_THRESH_115_PERCENT_OVP, - OUTPUT_THRESH_120_PERCENT_OVP, - } output_ovp_threshold_t; - - /** - * MAX77801 constructor. - * - * @param i2c I2C object to use. - */ - MAX77801(I2C *i2c); - - /** - * MAX77801 destructor. - */ - ~MAX77801(); - - /** - * @brief Initialize MAX77801 - */ - int32_t init(); - - /** - * @brief Write Register - * @details Writes data to MAX77801 register - * - * @param reg_addr Register to write - * @param reg_data Data to write - * @returns 0 if no errors, -1 if error. - */ - int32_t write_register(MAX77801::registers_t reg_addr, char reg_data); - - /** - * @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 read_register(MAX77801::registers_t reg_addr); - - /** - * @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 update_register - (MAX77801::registers_t reg_no, char reg_mask, char reg_data); - - /** - * @brief Get version info - * @details 0 : Plain - * - * @param None - * @returns version info. - */ - char* get_version(); - /** - * @brief Get revision info - * @details 0x1 : PASS1 - * 0x2 : PASS2 - * 0x3 : PASS3 - * @param None - * @returns revision info. - */ - char* get_revision(); - - /** - * @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 get_status(); - - /** - * @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 config_enable(MAX77801::config_enabled_t config, - MAX77801::enable_t en); - - /** - * @brief Config Ramp Up - * @details Set BB_RU_SR - * - * @param config : config value - * @returns 0 if no errors, -1 if error. - */ - int32_t config_ramp_up(MAX77801::ramp_up_rate_t config); - - /** - * @brief Config Ramp Down - * @details Set BB_RD_SR - * - * @param config : config value - * @returns 0 if no errors, -1 if error. - */ - int32_t config_ramp_down(MAX77801::ramp_dn_rate_t config); - - /** - * @brief Config OVP Threshold - * @details Set BB_OVP_TH bits - * - * @param config : config value - * @returns 0 if no errors, -1 if error. - */ - int32_t config_ovp_threshold(MAX77801::output_ovp_threshold_t config); - - /** - * @brief config pokpol active bit - * @details Set POK_POL Bit - * - * @param lowHigh : active value - * @returns 0 if no errors, -1 if error. - */ - int32_t config_pokpol_active(MAX77801::low_high_t lowHigh); - - /** - * @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 set_vout(double level, MAX77801::low_high_t dvs); - -private: - - I2C *i2c_; - bool i2c_owner; - -}; -#endif /* _MAX77801_H_ */ \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/max8971.cpp Tue Jun 26 08:05:21 2018 +0000 @@ -0,0 +1,665 @@ +/******************************************************************************* + * 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 "max8971.h" + +/***** Definitions *****/ +#define I2C_ADDR (0x35<<1) + +/** + * max8971 constructor. + * + * @param i2c I2C object to use. + */ +MAX8971::MAX8971(I2C *i2c) : + i2c_(i2c) +{ + i2c_owner = false; +} + +/** + * max8971 destructor. + */ +MAX8971::~MAX8971() +{ + if(i2c_owner) { + delete i2c_; + } +} + +/** + * @brief Initialize max8971 + */ +int32_t MAX8971::init() +{ + // insert initial setting functions + return 0; +} + +/** + * @brief Read Register + * @details Reads data from max8971 register + * + * @param reg_addr Register to read + * @returns data if no errors, -1 if error. + */ +int32_t MAX8971::read_register(MAX8971::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 MAX8971::write_register(MAX8971::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 MAX8971::update_register +(MAX8971::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 Interrupt + * @details Get status register data + * BIT7 : AICL_I DC Interrupt + * BIT6 : TOPOFF Topoff Interrupt + * BIT5 : DC Overvolatage Interrupt + * BIT4 : DC Undervoltage Interrupt + * BIT3 : Charge Current Interrupt + * BIT2 : Battery Interrupt + * BIT1 : Thermistor Interrupt + * BIT0 : Power-Up OK Interrupt + * @param None + * @returns Interrupt register data. + */ +int32_t MAX8971::get_interrupt() +{ + int32_t data; + + data = read_register(REG_CHG_STAT); + if(data < 0) + return -1; + return (data & 0xFF); +} + +/** + * @brief Set Interrupt Mask + * @details Get status register data + * BIT7 : AICL_I DC Interrupt + * BIT6 : TOPOFF Topoff Interrupt + * BIT5 : DC Overvolatage Interrupt + * BIT4 : DC Undervoltage Interrupt + * BIT3 : Charge Current Interrupt + * BIT2 : Battery Interrupt + * BIT1 : Thermistor Interrupt + * BIT0 : Reserved + * @param Register Number, Interrupt Bit + * @returns Interrupt register data. + */ +int32_t MAX8971::set_interrupt_mask +(MAX8971::registers_t reg_no, MAX8971::int_bit_t interrupt_bit) +{ + char mask_bit; + int32_t data; + + if(interrupt_bit <VAL_THM_I_BIT) + return -1; + + mask_bit = 0x01 << interrupt_bit; + data = update_register(REG_CHGINT_MASK, mask_bit, mask_bit); + if(data < 0) + return -1; + + data = read_register(REG_CHGINT_MASK); + if(data < 0) + return -1; + return (data & 0xFF); +} + +/** + * @brief Set Interrupt UnMask + * @details Get status register data + * BIT7 : AICL_I DC Interrupt + * BIT6 : TOPOFF Topoff Interrupt + * BIT5 : DC Overvolatage Interrupt + * BIT4 : DC Undervoltage Interrupt + * BIT3 : Charge Current Interrupt + * BIT2 : Battery Interrupt + * BIT1 : Thermistor Interrupt + * BIT0 : Reserved + * @param Register Number, Interrupt Bit + * @returns Interrupt register data. + */ +int32_t MAX8971::set_interrupt_unmask +(MAX8971::registers_t reg_no, MAX8971::int_bit_t interrupt_bit) +{ + char mask_bit; + int32_t data; + + if(interrupt_bit <VAL_THM_I_BIT) + return -1; + + mask_bit = 0x01 << interrupt_bit; + data = update_register(REG_CHGINT_MASK, mask_bit, 0); + if(data < 0) + return -1; + + data = read_register(REG_CHGINT_MASK); + if(data < 0) + return -1; + return (data & 0xFF); +} + +/** + * @brief Get status + * @details Get status register data + * BIT7 : DCV_OK DC Input Voltage Status + * BIT6 : DCI_OK DC Input Current Status + * BIT5 : DCOVP_OK DC OVP Status + * BIT4 : DCUVP_OK DC UVP Status + * BIT3 : CHG_OK Charger Status + * BIT2 : BAT_OK Battery Status + * BIT1 : THM_OK Thermistor Status + * BIT0 : RESERVED + * @param None + * @returns status register data. + */ +int32_t MAX8971::get_status() +{ + int32_t data; + + data = read_register(REG_CHG_STAT); + if(data < 0) + return -1; + return (data & 0xFE); +} + + +/** + * @brief Get Details 1 + * @details Get Details 1 register data + * BIT7 : DC Details + * BIT6 : DC Current + * BIT5 : DC OVP + * BIT4 : DC UVP + * BIT3 : RESERVED + * BIT2-0 : Thermistor Details + * @param None + * @returns status details 1 register data. + */ +int32_t MAX8971::get_details1() +{ + int32_t data; + + data = read_register(REG_DETAILS1); + if(data < 0) + return -1; + return (data & 0xF7); +} + +/** + * @brief Get Details 2 + * @details Get Details 2 register data + * BIT7-6 : Reserved + * BIT5-4 : Battery Details + * BIT3-0 : Charger Details + * @param None + * @returns status details 2 register data. + */ +int32_t MAX8971::get_details2() +{ + int32_t data; + + data = read_register(REG_DETAILS2); + if(data < 0) + return -1; + return (data & 0x3F); +} + +/** + * @brief Set DCMON_DIS + * @details Set to disable the monitoring of input voltage + * by the input power limiter + * @param None + * @returns DCMON_DIS bit data. + */ +int32_t MAX8971::set_disable_dc_monitor() +{ + int32_t shift = 1; + char mask_bit = 0x01 << shift; + int32_t data; + + data = update_register(REG_CHGCNTL1, mask_bit, 1); + if(data < 0) + return -1; + + data = read_register(REG_CHGCNTL1); + if(data < 0) + return -1; + return ( (data & mask_bit) >> shift); +} + +/** + * @brief UnSet DCMON_DIS + * @details UnSet to enable the monitoring of input voltage + * by the input power limiter + * @param None + * @returns DCMON_DIS bit data. + */ +int32_t MAX8971::unset_disable_dc_monitor() +{ + int32_t shift = 1; + char mask_bit = 0x01 << shift; + int32_t data; + + data = update_register(REG_CHGCNTL1, mask_bit, 0); + if(data < 0) + return -1; + + data = read_register(REG_CHGCNTL1); + if(data < 0) + return -1; + return ( (data & mask_bit) >> shift); +} + +/** + * @brief Set USB SUSPEND + * @details Set to USB Suspend bit + * @param None + * @returns USB SUSPEND bit data. + */ +int32_t MAX8971::set_usb_suspend() +{ + int32_t data; + + data = update_register(REG_CHGCNTL1, 0x01, 1); + if(data < 0) + return -1; + + data = read_register(REG_CHGCNTL1); + if(data < 0) + return -1; + return ( data & 0x01); +} + +/** + * @brief UnSet USB SUSPEND + * @details UnSet to USB Suspend bit + * @param None + * @returns USB SUSPEND bit data. + */ +int32_t MAX8971::unset_usb_suspend() +{ + int32_t data; + + data = update_register(REG_CHGCNTL1, 0x01, 0); + if(data < 0) + return -1; + + data = read_register(REG_CHGCNTL1); + if(data < 0) + return -1; + return ( data & 0x01); +} + + +/** + * @brief Set Fast Charge Current + * @details Set to CHGCC bit to control Fast Charge Current + * @param int 0-1550 + * @returns Fast Charge Current Bit Data. + */ +int32_t MAX8971::set_fast_charge_current(int current) +{ + char mask_bit = 0x1f; + char value_bit = 0x0; + int32_t data; + + switch(current) + { + case 0 ... 249: + value_bit = 0x0; + break; + case 250 ... 1550: + value_bit = current/50; + break; + default: + value_bit = 0x1f; + break; + } + + data = update_register(REG_FCHGCRNT, mask_bit, value_bit); + if(data < 0) + return -1; + + data = read_register(REG_FCHGCRNT); + if(data < 0) + return -1; + return ( data & mask_bit); +} + +/** + * @brief Set Fast Charge Timer Duration + * @details Set to FCHGT bit to control Fast Charge Timer + * @param fast_charge_timer_t + * @returns Fast Charge Timer Bit Data. + */ +int32_t MAX8971::set_fast_charge_timer(MAX8971::fast_charge_timer_t fc_time) +{ + char mask_bit = 0xE0; + int32_t shift = 5; + int32_t data; + + data = update_register(REG_FCHGCRNT, mask_bit, fc_time<<shift); + if(data < 0) + return -1; + + data = read_register(REG_FCHGCRNT); + if(data < 0) + return -1; + return ( (data & mask_bit) >> shift); +} + +/** + * @brief Set Fast Restart Threshold + * @details Set to CHGRSTRT bit to control Fast Restart Threshold + * @param fast_charge_restart_threshold_t + * @returns CHGRSTRT bit Data. + */ +int32_t MAX8971::set_fast_charge_restart_threshold +(MAX8971::fast_charge_restart_threshold_t voltage) +{ + char mask_bit = 0x40; + int32_t shift = 6; + int32_t data; + + data = update_register(REG_DCCRNT, mask_bit, voltage<<shift); + if(data < 0) + return -1; + + data = read_register(REG_DCCRNT); + if(data < 0) + return -1; + return ( (data & mask_bit) >> shift); +} + +/** + * @brief Set Input Current Limit + * @details Set to DCILMT to control Input Current Limit + * 0x00 - 0x09 : 100mA + * 0x10 - 1x3C : 250 mA - 1500 mA with 25m A + * @param int 0-1500 + * @returns DCILMT bit Data. + */ +int32_t MAX8971::set_input_current_limit(int limit) +{ + char mask_bit = 0x3F; + char value_bit = 0; + int32_t data; + + switch(limit) + { + case 0 ... 99: + value_bit = 0x3f; // disable + break; + case 100 ... 249: + value_bit = 0x09; + break; + case 250 ... 1500: + value_bit = limit/25; + break; + default: + value_bit = 0x3c; //maximum current is 1500mA(0x3C) + break; + } + + data = update_register(REG_DCCRNT, mask_bit, value_bit); + if(data < 0) + return -1; + + data = read_register(REG_DCCRNT); + if(data < 0) + return -1; + return ( data & mask_bit); +} + +/** + * @brief Set Topoff Timer + * @details Set to TOFFT bit to control Topoff Timer + * @param top_off_timer_t + * @returns TOFFT bit Data. + */ +int32_t MAX8971::set_top_off_timer(MAX8971::top_off_timer_t time) +{ + char mask_bit = 0xE0; + int32_t shift = 5; + int32_t data; + + data = update_register(REG_TOPOFF, mask_bit, time<<shift); + if(data < 0) + return -1; + + data = read_register(REG_TOPOFF); + if(data < 0) + return -1; + return ( (data & mask_bit) >> shift); +} + + +/** + * @brief Set Topoff Current Threshold + * @details Set to TOFFS bit to control Topoff Current Threshold + * @param top_off_current_threshold_t + * @returns TOFFS bit Data. + */ +int32_t MAX8971::set_top_off_current_threshold +(MAX8971::top_off_current_threshold_t current) +{ + char mask_bit = 0x0C; + int32_t shift = 2; + int32_t data; + + data = update_register(REG_TOPOFF, mask_bit, current<<shift); + if(data < 0) + return -1; + + data = read_register(REG_TOPOFF); + if(data < 0) + return -1; + return ( (data & mask_bit) >> shift); +} + + +/** + * @brief Set Charge Termination Voltage + * @details Set to CHGCV bit to control Charge Termination Voltage in CV Mode + * @param charger_termination_voltage_t + * @returns CHGCV bit Data. + */ +int32_t MAX8971::set_charge_termination_voltage +(MAX8971::charger_termination_voltage_t voltage) +{ + char mask_bit = 0x03; + int32_t shift = 0; + int32_t data; + + data = update_register(REG_TOPOFF, mask_bit, voltage<<shift); + if(data < 0) + return -1; + + data = read_register(REG_TOPOFF); + if(data < 0) + return -1; + return ( (data & mask_bit) >> shift); +} + +/** + * @brief Set Die-Temperature Regulation Loop Set Point + * @details Set to REGTEMP bit to control + * Die-Temperature Regulation Loop Set Point + * @param die_temp_reggulation_point_t + * @returns REGTEMP bit Data. + */ +int32_t MAX8971::set_charge_termination_voltage +(MAX8971::die_temp_reggulation_point_t degree) +{ + char mask_bit = 0xC0; + int32_t shift = 6; + int32_t data; + + data = update_register(REG_TEMPREG, mask_bit, degree<<shift); + if(data < 0) + return -1; + + data = read_register(REG_TEMPREG); + if(data < 0) + return -1; + return ( (data & mask_bit) >> shift); +} + +/** + * @brief Set Thermistor Monitor Configuration + * @details Set to THM_CNFG bit to control Thermistor Monitor Configuration + * @param thermistor_monitor_config_t + * @returns REGTEMP bit Data. + */ +int32_t MAX8971::set_thermistor_monitor +(MAX8971::thermistor_monitor_config_t enable) +{ + char mask_bit = 0x08; + int32_t shift = 3; + int32_t data; + + data = update_register(REG_TEMPREG, mask_bit, enable<<shift); + if(data < 0) + return -1; + + data = read_register(REG_TEMPREG); + if(data < 0) + return -1; + return ( (data & mask_bit) >> shift); +} + +/** + * @brief Set JEITA Safty Region + * @details Set SAFETYREG bit to control JEITA Safty Region + * @param jeita_safety_selection_t + * @returns SAFETYREG bit Data. + */ +int32_t MAX8971::set_jeita_safety_region +(MAX8971::jeita_safety_selection_t enable) +{ + char mask_bit = 0x01; + int32_t shift = 0; + int32_t data; + + data = update_register(REG_TEMPREG, mask_bit, enable<<shift); + if(data < 0) + return -1; + + data = read_register(REG_TEMPREG); + if(data < 0) + return -1; + return ( (data & mask_bit) >> shift); +} + +/** + * @brief Set Charger-Setting Protection + * @details Set CPROT bit to control Charger-Setting Protection + * @param charger_setting_protection_t + * @returns CPROT bit Data. + */ +int32_t MAX8971::set_charger_setting_protection +(MAX8971::charger_setting_protection_t enable) +{ + char mask_bit = 0x0C; + int32_t shift = 2; + int32_t data; + + data = update_register(REG_PROTCMD, mask_bit, enable<<shift); + if(data < 0) + return -1; + + data = read_register(REG_PROTCMD); + if(data < 0) + return -1; + return ( (data & mask_bit) >> shift); +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/max8971.h Tue Jun 26 08:05:21 2018 +0000 @@ -0,0 +1,474 @@ +/******************************************************************************* + * 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. + ******************************************************************************* + */ +#ifndef _max8971_H_ +#define _max8971_H_ + +#include "mbed.h" + +class MAX8971 +{ + +public: + /** + * @brief Register Addresses + * @details Enumerated max8971 register addresses + */ + typedef enum { + REG_CHGINT_INT = 0x0F, + REG_CHGINT_MASK = 0x01, + REG_CHG_STAT, + REG_DETAILS1, + REG_DETAILS2, + REG_CHGCNTL1, + REG_FCHGCRNT, + REG_DCCRNT, + REG_TOPOFF, + REG_TEMPREG, + REG_PROTCMD + } registers_t; + + /** + * @brief Interrupt Unmasked/Masked + * @details Enumerated Interrupt Unmasked/Masked + */ + typedef enum { + VAL_INT_UNMASKED = 0x00, + VAL_INT_MASKED + } int_mask_t; + + /** + * @brief Interrupt Unmasked/Masked + * @details Enumerated Interrupt Unmasked/Masked + */ + typedef enum { + VAL_AICL_I_BIT = 7, + VAL_TOP_OFF_BIT = 6, + VAL_DC_OVP_BIT = 5, + VAL_DC_UVP_BIT = 4, + VAL_CHG_I_BIT = 3, + VAL_BAT_I_BIT = 2, + VAL_THM_I_BIT = 1, + VAL_POWERUP_BIT = 0, + } int_bit_t; + + /** + * @brief ENABLE/DISABLE + * @details Enumerated ENABLE/DISABLE + */ + typedef enum { + VAL_DISABLE = 0x00, + VAL_ENABLE + } enable_t; + + /** + * @brief Fast Charge Timer + * @details Enumerated Fast Charge Timer Duration + */ + typedef enum { + VAL_FC_TIMER_DISABLE = 0x00, + VAL_FC_TIMER_4_HOURS, + VAL_FC_TIMER_5_HOURS, + VAL_FC_TIMER_6_HOURS, + VAL_FC_TIMER_7_HOURS, + VAL_FC_TIMER_8_HOURS, + VAL_FC_TIMER_9_HOURS, + VAL_FC_TIMER_10_HOURS + } fast_charge_timer_t; + + /** + * @brief Fast Charge Restart Threshold + * @details Enumerated Fast Charge Restart Threshold + */ + typedef enum { + VAL_FC_RESTART_MINUS_150mV = 0x00, + VAL_FC_RESTART_MINUS_100mV, + } fast_charge_restart_threshold_t; + + /** + * @brief Topoff timer + * @details Enumerated Topoff Timer + */ + typedef enum { + VAL_TOPOFF_TIMER_0_MIN = 0x00, + VAL_TOPOFF_TIMER_10_MIN, + VAL_TOPOFF_TIMER_20_MIN, + VAL_TOPOFF_TIMER_30_MIN, + VAL_TOPOFF_TIMER_40_MIN, + VAL_TOPOFF_TIMER_50_MIN, + VAL_TOPOFF_TIMER_60_MIN, + VAL_TOPOFF_TIMER_70_MIN + } top_off_timer_t; + + /** + * @brief Topoff Current Threshold + * @details Enumerated Topoff Current Threshold + */ + typedef enum { + VAL_TOPOFF_CURRENT_TH_50_mA = 0x00, + VAL_TOPOFF_CURRENT_TH_100_mA, + VAL_TOPOFF_CURRENT_TH_150_mA, + VAL_TOPOFF_CURRENT_TH_200_mA + } top_off_current_threshold_t; + + /** + * @brief Charge Termination Voltage + * @details Enumerated Charge Termination Voltage + */ + typedef enum { + VAL_CHARGE_TERM_4200_mV = 0x00, + VAL_CHARGE_TERM_4100_mV, + VAL_CHARGE_TERM_4350_mV, + VAL_CHARGE_TERM_4150_mV + } charger_termination_voltage_t; + + /** + * @brief Die Temperature Thermal Regualation Loop Set Point + * @details Enumerated Die Temperature Thermal Regualation Loop Set Point + */ + typedef enum { + VAL_DIE_TEMP_REG_POINT_105_DEG = 0x00, + VAL_DIE_TEMP_REG_POINT_90_DEG, + VAL_DIE_TEMP_REG_POINT_120_DEG, + VAL_DIE_TEMP_REG_POINT_DISABLE, + } die_temp_reggulation_point_t; + + /** + * @brief Thermistor Monitor Configuration + * @details Enumerated Thermistor Monitor Configuration + */ + typedef enum { + VAL_THERMISTOR_MONITOR_ENABLE = 0x00, + VAL_THERMISTOR_MONITOR_DISABLE, + } thermistor_monitor_config_t; + + /** + * @brief JEITA Safety + * @details Enumerated JEITA Safety Region Selection + */ + typedef enum { + VAL_JEITA_SAFETY_REGION_1 = 0x00, + VAL_JEITA_SAFETY_REGION_2, + } jeita_safety_selection_t; + + /** + * @brief Charger Setting Protection + * @details Enumerated Charger Setting Protection + */ + typedef enum { + VAL_CHARGER_SETTING_LOCKED = 0x00, + VAL_CHARGER_SETTING_UNLOCKED = 0x03 + } charger_setting_protection_t; + + + /** + * max8971 constructor. + * + * @param i2c I2C object to use. + */ + MAX8971(I2C *i2c); + + /** + * max8971 destructor. + */ + ~MAX8971(); + + /** + * @brief Initialize max8971 + */ + int32_t init(); + + /** + * @brief Write Register + * @details Writes data to max8971 register + * + * @param reg_addr Register to write + * @param reg_data Data to write + * @returns 0 if no errors, -1 if error. + */ + int32_t write_register(MAX8971::registers_t reg_addr, char reg_data); + + /** + * @brief Read Register + * @details Reads data from max8971 register + * + * @param reg_addr Register to read + * @returns data if no errors, -1 if error. + */ + int32_t read_register(MAX8971::registers_t reg_addr); + + /** + * @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 update_register + (MAX8971::registers_t reg_no, char reg_mask, char reg_data); + + + /** + * @brief Get Interrupt + * @details Get status register data + * BIT7 : AICL_I DC Interrupt + * BIT6 : TOPOFF Topoff Interrupt + * BIT5 : DC Overvolatage Interrupt + * BIT4 : DC Undervoltage Interrupt + * BIT3 : Charge Current Interrupt + * BIT2 : Battery Interrupt + * BIT1 : Thermistor Interrupt + * BIT0 : Power-Up OK Interrupt + * @param None + * @returns Interrupt register data. + */ + int32_t get_interrupt(); + + /** + * @brief Set Interrupt Mask + * @details Get status register data + * BIT7 : AICL_I DC Interrupt + * BIT6 : TOPOFF Topoff Interrupt + * BIT5 : DC Overvolatage Interrupt + * BIT4 : DC Undervoltage Interrupt + * BIT3 : Charge Current Interrupt + * BIT2 : Battery Interrupt + * BIT1 : Thermistor Interrupt + * BIT0 : Reserved + * @param Register Number, Interrupt Bit + * @returns Interrupt register data. + */ + int32_t set_interrupt_mask + (MAX8971::registers_t reg_no, MAX8971::int_bit_t interrupt_bit); + + + /** + * @brief Set Interrupt UnMask + * @details Get status register data + * BIT7 : AICL_I DC Interrupt + * BIT6 : TOPOFF Topoff Interrupt + * BIT5 : DC Overvolatage Interrupt + * BIT4 : DC Undervoltage Interrupt + * BIT3 : Charge Current Interrupt + * BIT2 : Battery Interrupt + * BIT1 : Thermistor Interrupt + * BIT0 : Reserved + * @param Register Number, Interrupt Bit + * @returns Interrupt register data. + */ + int32_t set_interrupt_unmask + (MAX8971::registers_t reg_no, MAX8971::int_bit_t interrupt_bit); + + /** + * @brief Get status + * @details Get status register data + * BIT7 : DCV_OK DC Input Voltage Status + * BIT6 : DCI_OK DC Input Current Status + * BIT5 : DCOVP_OK DC OVP Status + * BIT4 : DCUVP_OK DC UVP Status + * BIT3 : CHG_OK Charger Status + * BIT2 : BAT_OK Battery Status + * BIT1 : THM_OK Thermistor Status + * BIT0 : RESERVED + * @param None + * @returns status register data. + */ + int32_t get_status(); + + /** + * @brief Get Details 1 + * @details Get Details 1 register data + * BIT7 : DC Details + * BIT6 : DC Current + * BIT5 : DC OVP + * BIT4 : DC UVP + * BIT3 : RESERVED + * BIT2-0 : Thermistor Details + * @param None + * @returns status register data. + */ + int32_t get_details1(); + + + /** + * @brief Get Details 2 + * @details Get Details 2 register data + * BIT7-6 : Reserved + * BIT5-4 : Battery Details + * BIT3-0 : Charger Details + * @param None + * @returns status details 2 register data. + */ + int32_t get_details2(); + + /** + * @brief Set DCMON_DIS + * @details Set to disable the monitoring of input voltage + * by the input power limiter + * @param None + * @returns DCMON_DIS bit data. + */ + int32_t set_disable_dc_monitor(); + + /** + * @brief UnSet DCMON_DIS + * @details UnSet to enable the monitoring of input voltage + * by the input power limiter + * @param None + * @returns DCMON_DIS bit data. + */ + int32_t unset_disable_dc_monitor(); +/** + * @brief Set USB SUSPEND + * @details Set to USB Suspend bit + * @param None + * @returns USB SUSPEND bit data. + */ +int32_t set_usb_suspend(); + +/** + * @brief UnSet USB SUSPEND + * @details UnSet to USB Suspend bit + * @param None + * @returns USB SUSPEND bit data. + */ +int32_t unset_usb_suspend(); + +/** + * @brief Set Fast Charge Current + * @details Set to CHGCC bit to control Fast Charge Current + * @param int 0-1550 + * @returns Fast Charge Current. + */ +int32_t set_fast_charge_current(int current); + +/** + * @brief Set Fast Charge Timer Duration + * @details Set to FCHGT bit to control Fast Charge Timer + * @param fast_charge_timer_t + * @returns Fast Charge Timer Bit Data. + */ +int32_t set_fast_charge_timer(MAX8971::fast_charge_timer_t fc_time); + +/** + * @brief Set Input Current Limit + * @details Set to DCILMT to control Input Current Limit + * 0x00 - 0x09 : 100mA + * 0x10 - 1x3C : 250 mA - 1500 mA with 25m A + * @param int 0-1500 + * @returns DCILMT bit Data. + */ + +/** + * @brief Set Fast Restart Threshold + * @details Set to CHGRSTRT bit to control Fast Restart Threshold + * @param fast_charge_restart_threshold_t + * @returns CHGRSTRT bit Data. + */ +int32_t set_fast_charge_restart_threshold +(MAX8971::fast_charge_restart_threshold_t voltage); + +int32_t set_input_current_limit(int limit); + +/** + * @brief Set Topoff Timer + * @details Set to TOFFT bit to control Topoff Timer + * @param top_off_timer_t + * @returns TOFFT bit Data. + */ +int32_t set_top_off_timer(MAX8971::top_off_timer_t time); + +/** + * @brief Set Topoff Current Threshold + * @details Set to TOFFS bit to control Topoff Current Threshold + * @param top_off_current_threshold_t + * @returns TOFFS bit Data. + */ +int32_t set_top_off_current_threshold +(MAX8971::top_off_current_threshold_t current); + +/** + * @brief Set Charge Termination Voltage + * @details Set to CHGCV bit to control Charge Termination Voltage in CV Mode + * @param charger_termination_voltage_t + * @returns CHGCV bit Data. + */ +int32_t set_charge_termination_voltage +(MAX8971::charger_termination_voltage_t voltage); + +/** + * @brief Set Die-Temperature Regulation Loop Set Point + * @details Set REGTEMP bit to control + * Die-Temperature Regulation Loop Set Point + * @param die_temp_reggulation_point_t + * @returns REGTEMP bit Data. + */ +int32_t set_charge_termination_voltage +(MAX8971::die_temp_reggulation_point_t degree); + +/** + * @brief Set Thermistor Monitor Configuration + * @details Set THM_CNFG bit to control the Thermistor Monitor Configuration + * @param thermistor_monitor_config_t + * @returns REGTEMP bit Data. + */ +int32_t set_thermistor_monitor +(MAX8971::thermistor_monitor_config_t enable); + +/** + * @brief Set JEITA Safty Region + * @details Set SAFETYREG bit to control the JEITA Safty Region + * @param jeita_safety_selection_t + * @returns SAFETYREG bit Data. + */ +int32_t set_jeita_safety_region +(MAX8971::jeita_safety_selection_t enable); + +/** + * @brief Set Charger-Setting Protection + * @details Set CPROT bit to control Charger-Setting Protection + * @param charger_setting_protection_t + * @returns CPROT bit Data. + */ +int32_t set_charger_setting_protection +(MAX8971::charger_setting_protection_t enable); + + +private: + + I2C *i2c_; + bool i2c_owner; + +}; +#endif /* _max8971_H_ */ \ No newline at end of file