Maxim Integrated
This is a library for the MAX17055 Li+ Battery Fuel Gauge.
Dependents: Low_Power_Long_Distance_IR_Vision_Robot MAX17055_EZconfig MAX17055_EZconfig_Sample Low_Power_Long_Distance_IR_Vision_Robot
Fork of
max17055
by 
Maxim Integrated
max17055.cpp@13:fc91b283e689, 2018-06-18 (annotated)
- Committer:
- fneirab
- Date:
- Mon Jun 18 21:19:26 2018 +0000
- Revision:
- 13:fc91b283e689
- Parent:
- 12:519a18fc3b28
- Child:
- 14:519754351400
updates to libraries, clean up
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| fneirab | 9:f29d5e49b190 | 1 | /******************************************************************************* |
| fneirab | 9:f29d5e49b190 | 2 | * Copyright (C) 2018 Maxim Integrated Products, Inc., All Rights Reserved. |
| fneirab | 4:a4d6ae2182c2 | 3 | * |
| fneirab | 4:a4d6ae2182c2 | 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| fneirab | 4:a4d6ae2182c2 | 5 | * copy of this software and associated documentation files (the "Software"), |
| fneirab | 4:a4d6ae2182c2 | 6 | * to deal in the Software without restriction, including without limitation |
| fneirab | 4:a4d6ae2182c2 | 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| fneirab | 4:a4d6ae2182c2 | 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| fneirab | 4:a4d6ae2182c2 | 9 | * Software is furnished to do so, subject to the following conditions: |
| fneirab | 4:a4d6ae2182c2 | 10 | * |
| fneirab | 4:a4d6ae2182c2 | 11 | * The above copyright notice and this permission notice shall be included |
| fneirab | 4:a4d6ae2182c2 | 12 | * in all copies or substantial portions of the Software. |
| fneirab | 4:a4d6ae2182c2 | 13 | * |
| fneirab | 4:a4d6ae2182c2 | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| fneirab | 4:a4d6ae2182c2 | 15 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| fneirab | 4:a4d6ae2182c2 | 16 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| fneirab | 4:a4d6ae2182c2 | 17 | * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES |
| fneirab | 4:a4d6ae2182c2 | 18 | * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| fneirab | 4:a4d6ae2182c2 | 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| fneirab | 4:a4d6ae2182c2 | 20 | * OTHER DEALINGS IN THE SOFTWARE. |
| fneirab | 4:a4d6ae2182c2 | 21 | * |
| fneirab | 4:a4d6ae2182c2 | 22 | * Except as contained in this notice, the name of Maxim Integrated |
| fneirab | 4:a4d6ae2182c2 | 23 | * Products, Inc. shall not be used except as stated in the Maxim Integrated |
| fneirab | 4:a4d6ae2182c2 | 24 | * Products, Inc. Branding Policy. |
| fneirab | 4:a4d6ae2182c2 | 25 | * |
| fneirab | 4:a4d6ae2182c2 | 26 | * The mere transfer of this software does not imply any licenses |
| fneirab | 4:a4d6ae2182c2 | 27 | * of trade secrets, proprietary technology, copyrights, patents, |
| fneirab | 4:a4d6ae2182c2 | 28 | * trademarks, maskwork rights, or any other form of intellectual |
| fneirab | 4:a4d6ae2182c2 | 29 | * property whatsoever. Maxim Integrated Products, Inc. retains all |
| fneirab | 4:a4d6ae2182c2 | 30 | * ownership rights. |
| fneirab | 9:f29d5e49b190 | 31 | ******************************************************************************* |
| fneirab | 9:f29d5e49b190 | 32 | */ |
| fneirab | 0:80c39eb8f3ba | 33 | |
| fneirab | 0:80c39eb8f3ba | 34 | #include "mbed.h" |
| fneirab | 0:80c39eb8f3ba | 35 | #include "max17055.h" |
| fneirab | 0:80c39eb8f3ba | 36 | |
| fneirab | 9:f29d5e49b190 | 37 | /* POR Mask */ |
| fneirab | 9:f29d5e49b190 | 38 | #define MAX17055_POR_MASK (0xFFFD) |
| fneirab | 9:f29d5e49b190 | 39 | |
| fneirab | 5:a18a189588dc | 40 | /* MODELCFG register bits */ |
| fneirab | 5:a18a189588dc | 41 | #define MAX17055_MODELCFG_REFRESH (1 << 15) |
| fneirab | 5:a18a189588dc | 42 | |
| fneirab | 5:a18a189588dc | 43 | |
| fneirab | 5:a18a189588dc | 44 | /* FSTAT register bits */ |
| fneirab | 5:a18a189588dc | 45 | #define MAX17055_FSTAT_DNR (1) |
| fneirab | 5:a18a189588dc | 46 | |
| fneirab | 11:bdbd3104995b | 47 | /* LIBRARY FUNCTION SUCCESS*/ |
| fneirab | 11:bdbd3104995b | 48 | #define F_SUCCESS_0 0 |
| fneirab | 11:bdbd3104995b | 49 | |
| fneirab | 11:bdbd3104995b | 50 | /* LIBRARY FUNCTION ERROR CODES */ |
| fneirab | 12:519a18fc3b28 | 51 | #define F_ERROR_1 -1 //-1 if I2C read/write errors exist |
| fneirab | 11:bdbd3104995b | 52 | #define F_ERROR_2 -2 //-2 if device is not present |
| fneirab | 11:bdbd3104995b | 53 | #define F_ERROR_3 -3 //-3 if function error |
| fneirab | 11:bdbd3104995b | 54 | #define F_ERROR_4 -4 //-4 if other error |
| fneirab | 11:bdbd3104995b | 55 | #define F_ERROR_5 -5 //-5 if POR not detected |
| fneirab | 4:a4d6ae2182c2 | 56 | |
| fneirab | 0:80c39eb8f3ba | 57 | |
| fneirab | 5:a18a189588dc | 58 | |
| fneirab | 11:bdbd3104995b | 59 | /** |
| fneirab | 11:bdbd3104995b | 60 | * @brief max17055 Constructor |
| fneirab | 11:bdbd3104995b | 61 | * @details max17055 Constructor with battery and i2c as parameters |
| fneirab | 11:bdbd3104995b | 62 | */ |
| fneirab | 5:a18a189588dc | 63 | MAX17055::MAX17055(I2C &i2c): |
| fneirab | 5:a18a189588dc | 64 | m_i2cBus(i2c) |
| fneirab | 0:80c39eb8f3ba | 65 | { |
| fneirab | 5:a18a189588dc | 66 | //empty block |
| fneirab | 0:80c39eb8f3ba | 67 | } |
| fneirab | 0:80c39eb8f3ba | 68 | |
| fneirab | 11:bdbd3104995b | 69 | /** |
| fneirab | 11:bdbd3104995b | 70 | * @brief Fuel Gauge Destructor |
| fneirab | 11:bdbd3104995b | 71 | */ |
| fneirab | 0:80c39eb8f3ba | 72 | MAX17055::~MAX17055() |
| fneirab | 0:80c39eb8f3ba | 73 | { |
| fneirab | 0:80c39eb8f3ba | 74 | //empty block |
| fneirab | 0:80c39eb8f3ba | 75 | } |
| fneirab | 5:a18a189588dc | 76 | |
| fneirab | 0:80c39eb8f3ba | 77 | /** |
| fneirab | 11:bdbd3104995b | 78 | * @brief Writes a register. |
| fneirab | 11:bdbd3104995b | 79 | * |
| fneirab | 11:bdbd3104995b | 80 | * @param[in] reg_addr The register address |
| fneirab | 11:bdbd3104995b | 81 | * @param[in] reg_data The register data |
| fneirab | 11:bdbd3104995b | 82 | * |
| fneirab | 11:bdbd3104995b | 83 | * @retval 0 on success |
| fneirab | 11:bdbd3104995b | 84 | * @retval non-0 for errors |
| fneirab | 11:bdbd3104995b | 85 | */ |
| fneirab | 0:80c39eb8f3ba | 86 | int MAX17055::writeReg(Registers_e reg_addr, uint16_t reg_data) |
| fneirab | 0:80c39eb8f3ba | 87 | { |
| fneirab | 0:80c39eb8f3ba | 88 | |
| fneirab | 7:479a36909ced | 89 | uint16_t mask = 0x00FF; |
| fneirab | 1:a031f0c6a71e | 90 | uint8_t dataLSB; |
| fneirab | 1:a031f0c6a71e | 91 | uint8_t dataMSB; |
| fneirab | 5:a18a189588dc | 92 | |
| fneirab | 7:479a36909ced | 93 | dataLSB = reg_data & mask; |
| fneirab | 7:479a36909ced | 94 | dataMSB = (reg_data >> 8) & mask; |
| fneirab | 5:a18a189588dc | 95 | |
| fneirab | 7:479a36909ced | 96 | char addr_plus_data[3] = {reg_addr, dataLSB, dataMSB}; |
| fneirab | 5:a18a189588dc | 97 | |
| fneirab | 11:bdbd3104995b | 98 | if ( m_i2cBus.write(I2C_W_ADRS, addr_plus_data, 3, false) == F_SUCCESS_0) |
| fneirab | 11:bdbd3104995b | 99 | return F_SUCCESS_0; |
| fneirab | 0:80c39eb8f3ba | 100 | else |
| fneirab | 11:bdbd3104995b | 101 | return F_ERROR_1; |
| fneirab | 11:bdbd3104995b | 102 | } |
| fneirab | 0:80c39eb8f3ba | 103 | |
| fneirab | 0:80c39eb8f3ba | 104 | /** |
| fneirab | 11:bdbd3104995b | 105 | * @brief Reads from MAX17055 register. |
| fneirab | 11:bdbd3104995b | 106 | * |
| fneirab | 11:bdbd3104995b | 107 | * @param[in] reg_addr The register address |
| fneirab | 11:bdbd3104995b | 108 | * @param value The value |
| fneirab | 11:bdbd3104995b | 109 | * |
| fneirab | 11:bdbd3104995b | 110 | * @retval 0 on success |
| fneirab | 11:bdbd3104995b | 111 | * @retval non-0 for errors |
| fneirab | 11:bdbd3104995b | 112 | */ |
| fneirab | 1:a031f0c6a71e | 113 | int32_t MAX17055::readReg(Registers_e reg_addr, uint16_t &value) |
| fneirab | 0:80c39eb8f3ba | 114 | { |
| fneirab | 0:80c39eb8f3ba | 115 | int32_t result; |
| fneirab | 7:479a36909ced | 116 | uint16_t mask = 0x00FF; |
| fneirab | 1:a031f0c6a71e | 117 | char local_data[1]; |
| fneirab | 0:80c39eb8f3ba | 118 | local_data[0] = reg_addr; |
| fneirab | 1:a031f0c6a71e | 119 | char read_data[2]; |
| fneirab | 5:a18a189588dc | 120 | |
| fneirab | 0:80c39eb8f3ba | 121 | result = m_i2cBus.write(I2C_W_ADRS, local_data, 1); |
| fneirab | 11:bdbd3104995b | 122 | if(result == F_SUCCESS_0) { |
| fneirab | 1:a031f0c6a71e | 123 | result = m_i2cBus.read(I2C_R_ADRS, read_data , 2, false); |
| fneirab | 11:bdbd3104995b | 124 | if (result == F_SUCCESS_0) { |
| fneirab | 7:479a36909ced | 125 | value = ( ((read_data[1] & mask) << 8) + (read_data[0])); |
| fneirab | 11:bdbd3104995b | 126 | result = F_SUCCESS_0; |
| fneirab | 5:a18a189588dc | 127 | } |
| fneirab | 0:80c39eb8f3ba | 128 | } |
| fneirab | 0:80c39eb8f3ba | 129 | return result; |
| fneirab | 0:80c39eb8f3ba | 130 | } |
| fneirab | 0:80c39eb8f3ba | 131 | |
| fneirab | 1:a031f0c6a71e | 132 | /** |
| fneirab | 11:bdbd3104995b | 133 | * @brief Write and Verify a MAX17055 register |
| fneirab | 11:bdbd3104995b | 134 | * @par Details |
| fneirab | 12:519a18fc3b28 | 135 | * This function writes and verifies if the writing process was successful |
| fneirab | 11:bdbd3104995b | 136 | * |
| fneirab | 11:bdbd3104995b | 137 | * @param[in] reg_addr - register address |
| fneirab | 11:bdbd3104995b | 138 | * @param[out] reg_data - the variable that contains the data to write |
| fneirab | 11:bdbd3104995b | 139 | * to the register address |
| fneirab | 11:bdbd3104995b | 140 | * |
| fneirab | 11:bdbd3104995b | 141 | * @retval 0 on success |
| fneirab | 12:519a18fc3b28 | 142 | * @retval non-0 for errors |
| fneirab | 11:bdbd3104995b | 143 | */ |
| fneirab | 5:a18a189588dc | 144 | int MAX17055::write_and_verify_reg(Registers_e reg_addr, uint16_t reg_data) |
| fneirab | 5:a18a189588dc | 145 | { |
| fneirab | 1:a031f0c6a71e | 146 | int retries = 8; |
| fneirab | 1:a031f0c6a71e | 147 | int ret; |
| fneirab | 1:a031f0c6a71e | 148 | int statusRead; |
| fneirab | 1:a031f0c6a71e | 149 | int statusWrite; |
| fneirab | 1:a031f0c6a71e | 150 | uint16_t read_data; |
| fneirab | 5:a18a189588dc | 151 | |
| fneirab | 1:a031f0c6a71e | 152 | do { |
| fneirab | 1:a031f0c6a71e | 153 | statusWrite = writeReg(reg_addr, reg_data); |
| fneirab | 11:bdbd3104995b | 154 | if (statusWrite != F_SUCCESS_0) |
| fneirab | 12:519a18fc3b28 | 155 | ret = -6; |
| fneirab | 1:a031f0c6a71e | 156 | wait_ms(3); |
| fneirab | 5:a18a189588dc | 157 | statusRead = readReg(reg_addr, read_data); |
| fneirab | 11:bdbd3104995b | 158 | if (statusRead != F_SUCCESS_0) |
| fneirab | 12:519a18fc3b28 | 159 | ret = -7; |
| fneirab | 5:a18a189588dc | 160 | if (read_data != reg_data) { |
| fneirab | 12:519a18fc3b28 | 161 | ret = -8; |
| fneirab | 1:a031f0c6a71e | 162 | retries--; |
| fneirab | 1:a031f0c6a71e | 163 | } |
| fneirab | 5:a18a189588dc | 164 | } while (retries && read_data != reg_data); |
| fneirab | 5:a18a189588dc | 165 | |
| fneirab | 11:bdbd3104995b | 166 | if (ret!=F_SUCCESS_0) |
| fneirab | 1:a031f0c6a71e | 167 | return ret; |
| fneirab | 7:479a36909ced | 168 | else |
| fneirab | 11:bdbd3104995b | 169 | return F_SUCCESS_0; |
| fneirab | 1:a031f0c6a71e | 170 | } |
| fneirab | 2:ff7db397b70f | 171 | |
| fneirab | 2:ff7db397b70f | 172 | /** |
| fneirab | 11:bdbd3104995b | 173 | * @brief Initialization Function for MAX17055. |
| fneirab | 11:bdbd3104995b | 174 | * @par Details |
| fneirab | 12:519a18fc3b28 | 175 | * This function initializes the MAX17055 for the implementation of the EZconfig model.\n |
| fneirab | 12:519a18fc3b28 | 176 | * The library needs to be customized for the implementation of customize model.\n |
| fneirab | 11:bdbd3104995b | 177 | * |
| fneirab | 11:bdbd3104995b | 178 | * @retval 0 on success |
| fneirab | 11:bdbd3104995b | 179 | * @retval non-0 for errors |
| fneirab | 11:bdbd3104995b | 180 | */ |
| fneirab | 7:479a36909ced | 181 | int MAX17055::init(platform_data des_data) |
| fneirab | 2:ff7db397b70f | 182 | { |
| fneirab | 6:5ced10109ebf | 183 | |
| fneirab | 5:a18a189588dc | 184 | int status, ret; |
| fneirab | 9:f29d5e49b190 | 185 | int time_out = 10; |
| fneirab | 12:519a18fc3b28 | 186 | uint16_t hibcfg_value,read_data; |
| fneirab | 5:a18a189588dc | 187 | |
| fneirab | 5:a18a189588dc | 188 | |
| fneirab | 7:479a36909ced | 189 | status = readReg(VERSION_REG, read_data); |
| fneirab | 11:bdbd3104995b | 190 | if (status != F_SUCCESS_0) |
| fneirab | 11:bdbd3104995b | 191 | return status; |
| fneirab | 5:a18a189588dc | 192 | |
| fneirab | 12:519a18fc3b28 | 193 | ///STEP 0. Check for POR (Skip load model if POR bit is cleared) |
| fneirab | 5:a18a189588dc | 194 | |
| fneirab | 11:bdbd3104995b | 195 | if (check_POR_func() == F_ERROR_5) |
| fneirab | 11:bdbd3104995b | 196 | return F_ERROR_5; //POR not detected. Skip Initialization. |
| fneirab | 12:519a18fc3b28 | 197 | //This is not an error. |
| fneirab | 2:ff7db397b70f | 198 | |
| fneirab | 12:519a18fc3b28 | 199 | ///STEP 1. Check if FStat.DNR == 0 (Do not continue until FSTAT.DNR == 0) |
| fneirab | 7:479a36909ced | 200 | ret = poll_flag_clear(FSTAT_REG, MAX17055_FSTAT_DNR, time_out); |
| fneirab | 11:bdbd3104995b | 201 | if (ret < F_SUCCESS_0) { |
| fneirab | 6:5ced10109ebf | 202 | return ret; |
| fneirab | 3:f77a8345b0e3 | 203 | } |
| fneirab | 5:a18a189588dc | 204 | |
| fneirab | 12:519a18fc3b28 | 205 | ///STEP 1.2. Force exit from hibernate |
| fneirab | 12:519a18fc3b28 | 206 | hibcfg_value = forcedExitHiberMode(); |
| fneirab | 7:479a36909ced | 207 | |
| fneirab | 9:f29d5e49b190 | 208 | //printf("step 1 check \r\n"); |
| fneirab | 5:a18a189588dc | 209 | |
| fneirab | 12:519a18fc3b28 | 210 | ///STEP 2. Initialize configuration |
| fneirab | 5:a18a189588dc | 211 | switch (1) { |
| fneirab | 5:a18a189588dc | 212 | case MODEL_LOADING_OPTION1: |
| fneirab | 12:519a18fc3b28 | 213 | ///STEP 2.1. Load EZ Config |
| fneirab | 13:fc91b283e689 | 214 | EZconfig(des_data); |
| fneirab | 5:a18a189588dc | 215 | |
| fneirab | 12:519a18fc3b28 | 216 | ///STEP 2.2. Poll ModelCFG.ModelRefresh bit for clear |
| fneirab | 7:479a36909ced | 217 | ret = poll_flag_clear(MODELCFG_REG, MAX17055_MODELCFG_REFRESH, time_out); |
| fneirab | 11:bdbd3104995b | 218 | if(ret < F_SUCCESS_0) { |
| fneirab | 5:a18a189588dc | 219 | return ret; |
| fneirab | 5:a18a189588dc | 220 | } |
| fneirab | 7:479a36909ced | 221 | |
| fneirab | 9:f29d5e49b190 | 222 | break; |
| fneirab | 5:a18a189588dc | 223 | } |
| fneirab | 12:519a18fc3b28 | 224 | ///STEP3. Restore original HibCfg |
| fneirab | 7:479a36909ced | 225 | writeReg(HIBCFG_REG, hibcfg_value); |
| fneirab | 5:a18a189588dc | 226 | |
| fneirab | 5:a18a189588dc | 227 | /* Clear Status.POR */ |
| fneirab | 9:f29d5e49b190 | 228 | ret = clear_POR_bit(); |
| fneirab | 11:bdbd3104995b | 229 | if (ret < F_SUCCESS_0) |
| fneirab | 11:bdbd3104995b | 230 | return ret; //See errors |
| fneirab | 11:bdbd3104995b | 231 | return F_SUCCESS_0; |
| fneirab | 5:a18a189588dc | 232 | } |
| fneirab | 5:a18a189588dc | 233 | |
| fneirab | 9:f29d5e49b190 | 234 | /** |
| fneirab | 11:bdbd3104995b | 235 | * @brief Check POR function |
| fneirab | 11:bdbd3104995b | 236 | * @par Details |
| fneirab | 11:bdbd3104995b | 237 | * This function check is there was a power on reset event for the |
| fneirab | 11:bdbd3104995b | 238 | * MAX17055 |
| fneirab | 11:bdbd3104995b | 239 | * |
| fneirab | 11:bdbd3104995b | 240 | * @retval 0 on success (POR detected) |
| fneirab | 11:bdbd3104995b | 241 | * @retval non-0 for errors (POR not detected) |
| fneirab | 11:bdbd3104995b | 242 | * |
| fneirab | 11:bdbd3104995b | 243 | */ |
| fneirab | 9:f29d5e49b190 | 244 | int MAX17055::check_POR_func() |
| fneirab | 9:f29d5e49b190 | 245 | { |
| fneirab | 9:f29d5e49b190 | 246 | uint16_t read_data; |
| fneirab | 9:f29d5e49b190 | 247 | |
| fneirab | 9:f29d5e49b190 | 248 | readReg(STATUS_REG, read_data); |
| fneirab | 9:f29d5e49b190 | 249 | |
| fneirab | 9:f29d5e49b190 | 250 | if (!(read_data & MAX17055_STATUS_POR ) ) |
| fneirab | 11:bdbd3104995b | 251 | return F_ERROR_5; //POR not detected. |
| fneirab | 9:f29d5e49b190 | 252 | else |
| fneirab | 11:bdbd3104995b | 253 | return F_SUCCESS_0; |
| fneirab | 9:f29d5e49b190 | 254 | } |
| fneirab | 9:f29d5e49b190 | 255 | |
| fneirab | 9:f29d5e49b190 | 256 | /** |
| fneirab | 11:bdbd3104995b | 257 | * @brief clear POR bit function |
| fneirab | 11:bdbd3104995b | 258 | * @par Details |
| fneirab | 12:519a18fc3b28 | 259 | * This function clear the indicating bit for POR - MAX17055 |
| fneirab | 11:bdbd3104995b | 260 | * |
| fneirab | 11:bdbd3104995b | 261 | * @retval 0 for Success |
| fneirab | 11:bdbd3104995b | 262 | * @retval non-0 for errors |
| fneirab | 11:bdbd3104995b | 263 | */ |
| fneirab | 9:f29d5e49b190 | 264 | int MAX17055::clear_POR_bit() |
| fneirab | 9:f29d5e49b190 | 265 | { |
| fneirab | 9:f29d5e49b190 | 266 | int status, ret; |
| fneirab | 9:f29d5e49b190 | 267 | uint16_t read_data, hibcfg_value, reg; |
| fneirab | 9:f29d5e49b190 | 268 | |
| fneirab | 9:f29d5e49b190 | 269 | |
| fneirab | 9:f29d5e49b190 | 270 | status = readReg(STATUS_REG, read_data); |
| fneirab | 11:bdbd3104995b | 271 | if (status != F_SUCCESS_0) |
| fneirab | 11:bdbd3104995b | 272 | return F_ERROR_2; //Device is not present in the i2c Bus |
| fneirab | 9:f29d5e49b190 | 273 | status = write_and_verify_reg(STATUS_REG, (read_data & MAX17055_POR_MASK)); |
| fneirab | 11:bdbd3104995b | 274 | if (status != F_SUCCESS_0) |
| fneirab | 11:bdbd3104995b | 275 | return F_ERROR_1; //read or write error |
| fneirab | 9:f29d5e49b190 | 276 | else |
| fneirab | 11:bdbd3104995b | 277 | return F_SUCCESS_0; |
| fneirab | 9:f29d5e49b190 | 278 | } |
| fneirab | 5:a18a189588dc | 279 | |
| fneirab | 5:a18a189588dc | 280 | /** |
| fneirab | 11:bdbd3104995b | 281 | * @brief Poll Flag clear Function. |
| fneirab | 11:bdbd3104995b | 282 | * @par Details |
| fneirab | 11:bdbd3104995b | 283 | * This function clears status flags for the MAX17055 |
| fneirab | 11:bdbd3104995b | 284 | * |
| fneirab | 11:bdbd3104995b | 285 | * @param[in] reg_addr - register address |
| fneirab | 11:bdbd3104995b | 286 | * @param[in] mask - register address |
| fneirab | 11:bdbd3104995b | 287 | * @param[in] timeout - register data |
| fneirab | 11:bdbd3104995b | 288 | * |
| fneirab | 11:bdbd3104995b | 289 | * @retval 0 on success |
| fneirab | 11:bdbd3104995b | 290 | * @retval non-0 negative for errors |
| fneirab | 11:bdbd3104995b | 291 | */ |
| fneirab | 7:479a36909ced | 292 | int MAX17055::poll_flag_clear (Registers_e reg_addr, int mask, int timeout) |
| fneirab | 5:a18a189588dc | 293 | { |
| fneirab | 5:a18a189588dc | 294 | uint16_t data; |
| fneirab | 5:a18a189588dc | 295 | int ret; |
| fneirab | 5:a18a189588dc | 296 | |
| fneirab | 5:a18a189588dc | 297 | do { |
| fneirab | 9:f29d5e49b190 | 298 | wait_ms(1); |
| fneirab | 6:5ced10109ebf | 299 | ret = readReg(reg_addr, data); |
| fneirab | 11:bdbd3104995b | 300 | if(ret < F_SUCCESS_0) |
| fneirab | 11:bdbd3104995b | 301 | return F_ERROR_1; |
| fneirab | 5:a18a189588dc | 302 | |
| fneirab | 5:a18a189588dc | 303 | if(!(data & mask)) |
| fneirab | 11:bdbd3104995b | 304 | return F_SUCCESS_0; |
| fneirab | 5:a18a189588dc | 305 | |
| fneirab | 9:f29d5e49b190 | 306 | timeout -= 1; |
| fneirab | 5:a18a189588dc | 307 | } while(timeout > 0); |
| fneirab | 5:a18a189588dc | 308 | |
| fneirab | 11:bdbd3104995b | 309 | return F_ERROR_4; |
| fneirab | 5:a18a189588dc | 310 | } |
| fneirab | 5:a18a189588dc | 311 | |
| fneirab | 2:ff7db397b70f | 312 | /** |
| fneirab | 11:bdbd3104995b | 313 | * @brief Get Temperature Function from the MAX17055 TEMP register. |
| fneirab | 11:bdbd3104995b | 314 | * @par Details |
| fneirab | 11:bdbd3104995b | 315 | * This function sends a request to access the TEMP register |
| fneirab | 11:bdbd3104995b | 316 | * of the MAX17055, which reflects the temperature measured for the fuel gauge. |
| fneirab | 11:bdbd3104995b | 317 | * The temperature values will reflect the Config Register (0x1D) selections for Tsel bit (D15). |
| fneirab | 11:bdbd3104995b | 318 | * For this library the setting are for die temperature. |
| fneirab | 11:bdbd3104995b | 319 | * The MAX32620FTHR thermistor bias pin is not connected. The biasing of the thermistor is |
| fneirab | 11:bdbd3104995b | 320 | * done by the MAX77650. See MAX77650 library for how to enable the thermistor biasing. |
| fneirab | 11:bdbd3104995b | 321 | * |
| fneirab | 11:bdbd3104995b | 322 | * |
| fneirab | 11:bdbd3104995b | 323 | * @retval temp - Temperature value from TEMP register in °C |
| fneirab | 11:bdbd3104995b | 324 | * @retval non-0 negative values check for errors |
| fneirab | 11:bdbd3104995b | 325 | */ |
| fneirab | 7:479a36909ced | 326 | int MAX17055::get_temperature() |
| fneirab | 2:ff7db397b70f | 327 | { |
| fneirab | 5:a18a189588dc | 328 | |
| fneirab | 2:ff7db397b70f | 329 | int ret; |
| fneirab | 11:bdbd3104995b | 330 | uint16_t temp; |
| fneirab | 5:a18a189588dc | 331 | |
| fneirab | 11:bdbd3104995b | 332 | ret = readReg(TEMP_REG, temp); |
| fneirab | 11:bdbd3104995b | 333 | if (ret < F_SUCCESS_0) |
| fneirab | 2:ff7db397b70f | 334 | return ret; |
| fneirab | 2:ff7db397b70f | 335 | |
| fneirab | 2:ff7db397b70f | 336 | /* The value is signed. */ |
| fneirab | 11:bdbd3104995b | 337 | if (temp & 0x8000) |
| fneirab | 11:bdbd3104995b | 338 | temp |= 0xFFFF0000; |
| fneirab | 2:ff7db397b70f | 339 | |
| fneirab | 2:ff7db397b70f | 340 | /* The value is converted into centigrade scale */ |
| fneirab | 2:ff7db397b70f | 341 | /* Units of LSB = 1 / 256 degree Celsius */ |
| fneirab | 11:bdbd3104995b | 342 | temp >>= 8; |
| fneirab | 2:ff7db397b70f | 343 | |
| fneirab | 11:bdbd3104995b | 344 | return temp; |
| fneirab | 5:a18a189588dc | 345 | } |
| fneirab | 3:f77a8345b0e3 | 346 | |
| fneirab | 3:f77a8345b0e3 | 347 | /** |
| fneirab | 11:bdbd3104995b | 348 | * @brief Forced Exit Hibernate Mode Function for MAX17055 |
| fneirab | 11:bdbd3104995b | 349 | * @par Details |
| fneirab | 11:bdbd3104995b | 350 | * This function executes a force exit from hibernate mode. |
| fneirab | 11:bdbd3104995b | 351 | * |
| fneirab | 12:519a18fc3b28 | 352 | * @retval HibCFG original value before forced Exit Hibernate mode * |
| fneirab | 11:bdbd3104995b | 353 | */ |
| fneirab | 12:519a18fc3b28 | 354 | uint16_t MAX17055::forcedExitHiberMode() |
| fneirab | 3:f77a8345b0e3 | 355 | { |
| fneirab | 3:f77a8345b0e3 | 356 | uint16_t hibcfg; |
| fneirab | 5:a18a189588dc | 357 | |
| fneirab | 5:a18a189588dc | 358 | /* Force exit from hibernate */ |
| fneirab | 3:f77a8345b0e3 | 359 | //STEP 0: Store original HibCFG value |
| fneirab | 7:479a36909ced | 360 | readReg(HIBCFG_REG, hibcfg); |
| fneirab | 3:f77a8345b0e3 | 361 | |
| fneirab | 12:519a18fc3b28 | 362 | //STEP 1: Write to Soft-Wakeup Command Register |
| fneirab | 12:519a18fc3b28 | 363 | writeReg(VFSOC0_QH0_LOCK_REG, 0x90); //Soft-Wakeup from hibernate |
| fneirab | 5:a18a189588dc | 364 | |
| fneirab | 3:f77a8345b0e3 | 365 | //STEP 2: Write to Hibernate Configuration register |
| fneirab | 7:479a36909ced | 366 | writeReg(HIBCFG_REG, 0x0); //disable hibernate mode |
| fneirab | 5:a18a189588dc | 367 | |
| fneirab | 12:519a18fc3b28 | 368 | //STEP 3:Write to Soft-Wakeup Command Register |
| fneirab | 12:519a18fc3b28 | 369 | writeReg(VFSOC0_QH0_LOCK_REG, 0x0); //Clear All commands |
| fneirab | 5:a18a189588dc | 370 | |
| fneirab | 3:f77a8345b0e3 | 371 | return hibcfg; |
| fneirab | 5:a18a189588dc | 372 | } |
| fneirab | 7:479a36909ced | 373 | |
| fneirab | 7:479a36909ced | 374 | /** |
| fneirab | 12:519a18fc3b28 | 375 | * @brief EZ Config Initialization function |
| fneirab | 11:bdbd3104995b | 376 | * @par Details |
| fneirab | 12:519a18fc3b28 | 377 | * This function implements the steps for the EZ config m5 FuelGauge |
| fneirab | 12:519a18fc3b28 | 378 | * @param[in] des_data - Plataform_data struct with information about the design. |
| fneirab | 11:bdbd3104995b | 379 | * @retval 0 on success |
| fneirab | 11:bdbd3104995b | 380 | * @retval non-zero for errors |
| fneirab | 11:bdbd3104995b | 381 | */ |
| fneirab | 13:fc91b283e689 | 382 | uint16_t MAX17055::EZconfig(platform_data des_data) |
| fneirab | 7:479a36909ced | 383 | { |
| fneirab | 12:519a18fc3b28 | 384 | ///STEP 2.1.1 EZ config values suggested by manufacturer. |
| fneirab | 7:479a36909ced | 385 | const int charger_th = 4275; |
| fneirab | 12:519a18fc3b28 | 386 | const int chg_V_high = 51200; // scaling factor high voltage charger |
| fneirab | 7:479a36909ced | 387 | const int chg_V_low = 44138; |
| fneirab | 12:519a18fc3b28 | 388 | const int param_EZ_FG1 = 0x8400; // Sets config bit for the charge voltage for the m5 |
| fneirab | 7:479a36909ced | 389 | const int param_EZ_FG2 = 0x8000; |
| fneirab | 8:ca8765c30ed2 | 390 | uint16_t dpacc, ret; |
| fneirab | 7:479a36909ced | 391 | |
| fneirab | 12:519a18fc3b28 | 392 | ///STEP 2.1.2 Store the EZ Config values into the appropriate registers. |
| fneirab | 9:f29d5e49b190 | 393 | ret = writeReg(DESIGNCAP_REG, des_data.designcap); |
| fneirab | 12:519a18fc3b28 | 394 | ret = writeReg(DQACC_REG, des_data.designcap >> 5); //DesignCap divide by 32 |
| fneirab | 9:f29d5e49b190 | 395 | ret = writeReg(ICHGTERM_REG, des_data.ichgterm); |
| fneirab | 9:f29d5e49b190 | 396 | ret = writeReg(VEMPTY_REG, des_data.vempty); |
| fneirab | 7:479a36909ced | 397 | |
| fneirab | 7:479a36909ced | 398 | if (des_data.vcharge > charger_th) { |
| fneirab | 7:479a36909ced | 399 | dpacc = (des_data.designcap >> 5) * chg_V_high / des_data.designcap; |
| fneirab | 9:f29d5e49b190 | 400 | ret = writeReg(DPACC_REG, dpacc); |
| fneirab | 12:519a18fc3b28 | 401 | ret = writeReg(MODELCFG_REG, param_EZ_FG1); // |
| fneirab | 7:479a36909ced | 402 | } else { |
| fneirab | 7:479a36909ced | 403 | dpacc = (des_data.designcap >> 5) * chg_V_low / des_data.designcap; |
| fneirab | 9:f29d5e49b190 | 404 | ret = writeReg(DPACC_REG, dpacc); |
| fneirab | 9:f29d5e49b190 | 405 | ret = writeReg(MODELCFG_REG, param_EZ_FG2); |
| fneirab | 7:479a36909ced | 406 | } |
| fneirab | 7:479a36909ced | 407 | return ret; |
| fneirab | 7:479a36909ced | 408 | } |
| fneirab | 7:479a36909ced | 409 | |
| fneirab | 7:479a36909ced | 410 | /** |
| fneirab | 11:bdbd3104995b | 411 | * @brief Get reported State Of Charge(SOC) Function from MAX17055 Fuel Gauge. |
| fneirab | 11:bdbd3104995b | 412 | * @par Details |
| fneirab | 11:bdbd3104995b | 413 | * This function sends a request to access the RepSOC register |
| fneirab | 11:bdbd3104995b | 414 | * of the MAX17055. RepSOC is the reported state-of-charge percentage output of the fuel gauge. |
| fneirab | 11:bdbd3104995b | 415 | * |
| fneirab | 11:bdbd3104995b | 416 | * @retval soc_data - Reported SOC data from the RepSOC register in % value. |
| fneirab | 11:bdbd3104995b | 417 | * @retval non-0 negative values check for errors |
| fneirab | 11:bdbd3104995b | 418 | */ |
| fneirab | 7:479a36909ced | 419 | int MAX17055::get_SOC() |
| fneirab | 7:479a36909ced | 420 | { |
| fneirab | 7:479a36909ced | 421 | |
| fneirab | 7:479a36909ced | 422 | int ret; |
| fneirab | 11:bdbd3104995b | 423 | uint16_t soc_data; |
| fneirab | 7:479a36909ced | 424 | |
| fneirab | 11:bdbd3104995b | 425 | ret = readReg(REPSOC_REG, soc_data); |
| fneirab | 11:bdbd3104995b | 426 | if (ret < F_SUCCESS_0) |
| fneirab | 7:479a36909ced | 427 | return ret; |
| fneirab | 7:479a36909ced | 428 | |
| fneirab | 11:bdbd3104995b | 429 | soc_data = soc_data >> 8; /* RepSOC LSB: 1/256 % */ |
| fneirab | 7:479a36909ced | 430 | |
| fneirab | 11:bdbd3104995b | 431 | return soc_data; |
| fneirab | 7:479a36909ced | 432 | } |
| fneirab | 7:479a36909ced | 433 | |
| fneirab | 8:ca8765c30ed2 | 434 | /** |
| fneirab | 12:519a18fc3b28 | 435 | * @brief Get at rate Average State Of Charge(SOC) Function from MAX17055 Fuel Gauge. |
| fneirab | 11:bdbd3104995b | 436 | * @par Details |
| fneirab | 12:519a18fc3b28 | 437 | * This function sends a request to access the atAvSOC register of the MAX17055. |
| fneirab | 11:bdbd3104995b | 438 | * The AvSOC registers hold the calculated available capacity and percentage of the |
| fneirab | 11:bdbd3104995b | 439 | * battery based on all inputs from the ModelGauge m5 algorithm including empty |
| fneirab | 11:bdbd3104995b | 440 | * compensation. These registers provide unfiltered results. Jumps in the reported |
| fneirab | 11:bdbd3104995b | 441 | * values can be caused by abrupt changes in load current or temperature. |
| fneirab | 11:bdbd3104995b | 442 | * |
| fneirab | 12:519a18fc3b28 | 443 | * @retval atAvSOC_data - Average SOC data from the atAVSOC register in % value. |
| fneirab | 11:bdbd3104995b | 444 | * @retval non-0 negative values check for errors |
| fneirab | 11:bdbd3104995b | 445 | */ |
| fneirab | 12:519a18fc3b28 | 446 | int MAX17055::get_atAvSOC() |
| fneirab | 8:ca8765c30ed2 | 447 | { |
| fneirab | 8:ca8765c30ed2 | 448 | int ret; |
| fneirab | 12:519a18fc3b28 | 449 | uint16_t atAvSOC_data; |
| fneirab | 8:ca8765c30ed2 | 450 | |
| fneirab | 12:519a18fc3b28 | 451 | ret = readReg(AVSOC_REG, atAvSOC_data); |
| fneirab | 11:bdbd3104995b | 452 | if (ret < F_SUCCESS_0) |
| fneirab | 11:bdbd3104995b | 453 | return ret; //Check errors if data is not correct |
| fneirab | 8:ca8765c30ed2 | 454 | |
| fneirab | 12:519a18fc3b28 | 455 | atAvSOC_data = atAvSOC_data >> 8; /* avSOC LSB: 1/256 % */ |
| fneirab | 11:bdbd3104995b | 456 | |
| fneirab | 12:519a18fc3b28 | 457 | return atAvSOC_data; |
| fneirab | 8:ca8765c30ed2 | 458 | } |
| fneirab | 7:479a36909ced | 459 | |
| fneirab | 9:f29d5e49b190 | 460 | /** |
| fneirab | 11:bdbd3104995b | 461 | * @brief Get mix State Of Charge(SOC) Function for MAX17055 Fuel Gauge. |
| fneirab | 11:bdbd3104995b | 462 | * @par Details |
| fneirab | 11:bdbd3104995b | 463 | * This function sends a request to access mixSOC register |
| fneirab | 11:bdbd3104995b | 464 | * of the MAX17055. The MixSOC registers holds the calculated |
| fneirab | 11:bdbd3104995b | 465 | * remaining capacity and percentage of the cell before any empty compensation |
| fneirab | 11:bdbd3104995b | 466 | * adjustments are performed. |
| fneirab | 11:bdbd3104995b | 467 | * |
| fneirab | 11:bdbd3104995b | 468 | * @retval mixSOC_data - Mixed SOC register values from the mixSOC register in % value. |
| fneirab | 11:bdbd3104995b | 469 | * @retval non-0 for errors |
| fneirab | 11:bdbd3104995b | 470 | */ |
| fneirab | 11:bdbd3104995b | 471 | int MAX17055::get_mixSOC() |
| fneirab | 11:bdbd3104995b | 472 | { |
| fneirab | 11:bdbd3104995b | 473 | int ret; |
| fneirab | 11:bdbd3104995b | 474 | uint16_t mixSOC_data; |
| fneirab | 11:bdbd3104995b | 475 | |
| fneirab | 11:bdbd3104995b | 476 | ret = readReg(MIXSOC_REG, mixSOC_data); |
| fneirab | 11:bdbd3104995b | 477 | if (ret < F_SUCCESS_0) |
| fneirab | 11:bdbd3104995b | 478 | return ret; |
| fneirab | 9:f29d5e49b190 | 479 | |
| fneirab | 11:bdbd3104995b | 480 | mixSOC_data = mixSOC_data >> 8; /* RepSOC LSB: 1/256 % */ |
| fneirab | 9:f29d5e49b190 | 481 | |
| fneirab | 11:bdbd3104995b | 482 | return mixSOC_data; |
| fneirab | 11:bdbd3104995b | 483 | } |
| fneirab | 11:bdbd3104995b | 484 | |
| fneirab | 11:bdbd3104995b | 485 | /** |
| fneirab | 11:bdbd3104995b | 486 | * @brief Get the Time to Empty(TTE) Function form MAX17055 Fuel Gauge. |
| fneirab | 11:bdbd3104995b | 487 | * @par Details |
| fneirab | 11:bdbd3104995b | 488 | * This function sends a request to access the TTE register |
| fneirab | 11:bdbd3104995b | 489 | * of the MAX17055 |
| fneirab | 11:bdbd3104995b | 490 | * The TTE register holds the estimated time to empty for the |
| fneirab | 11:bdbd3104995b | 491 | * application under present temperature and load conditions. The TTE value is |
| fneirab | 11:bdbd3104995b | 492 | * determined by relating AvCap with AvgCurrent. The corresponding AvgCurrent |
| fneirab | 11:bdbd3104995b | 493 | * filtering gives a delay in TTE, but provides more stable results. |
| fneirab | 11:bdbd3104995b | 494 | * |
| fneirab | 11:bdbd3104995b | 495 | * @retval tte_data - Time to Empty data from the TTE register in seconds. |
| fneirab | 11:bdbd3104995b | 496 | * @retval non-0 negative values check for errors |
| fneirab | 11:bdbd3104995b | 497 | */ |
| fneirab | 12:519a18fc3b28 | 498 | float MAX17055::get_TTE() |
| fneirab | 9:f29d5e49b190 | 499 | { |
| fneirab | 9:f29d5e49b190 | 500 | |
| fneirab | 9:f29d5e49b190 | 501 | int ret; |
| fneirab | 11:bdbd3104995b | 502 | uint16_t tte_data; |
| fneirab | 12:519a18fc3b28 | 503 | float f_tte_data; |
| fneirab | 9:f29d5e49b190 | 504 | |
| fneirab | 11:bdbd3104995b | 505 | ret = readReg(TTE_REG, tte_data); |
| fneirab | 11:bdbd3104995b | 506 | if (ret < F_SUCCESS_0) |
| fneirab | 11:bdbd3104995b | 507 | return ret; |
| fneirab | 11:bdbd3104995b | 508 | else |
| fneirab | 12:519a18fc3b28 | 509 | f_tte_data = ((float)tte_data * 5.625); /* TTE LSB: 5.625 sec */ |
| fneirab | 9:f29d5e49b190 | 510 | |
| fneirab | 12:519a18fc3b28 | 511 | return f_tte_data; |
| fneirab | 9:f29d5e49b190 | 512 | } |
| fneirab | 7:479a36909ced | 513 | |
| fneirab | 7:479a36909ced | 514 | /** |
| fneirab | 11:bdbd3104995b | 515 | * @brief Get the at Time to Empty(atTTE) value Function for MAX17055 Fuel Gauge. |
| fneirab | 11:bdbd3104995b | 516 | * @par Details |
| fneirab | 11:bdbd3104995b | 517 | * This function sends a request to access the internal register |
| fneirab | 11:bdbd3104995b | 518 | * of the MAX17055 |
| fneirab | 11:bdbd3104995b | 519 | * |
| fneirab | 11:bdbd3104995b | 520 | * @retval atTTE_data - Time to Empty data from the atTTE register in seconds. |
| fneirab | 11:bdbd3104995b | 521 | * @retval non-0 negative values check for errors |
| fneirab | 11:bdbd3104995b | 522 | */ |
| fneirab | 12:519a18fc3b28 | 523 | float MAX17055::get_atTTE() |
| fneirab | 7:479a36909ced | 524 | { |
| fneirab | 7:479a36909ced | 525 | |
| fneirab | 7:479a36909ced | 526 | int ret; |
| fneirab | 11:bdbd3104995b | 527 | uint16_t atTTE_data; |
| fneirab | 12:519a18fc3b28 | 528 | float f_atTTE_data; |
| fneirab | 7:479a36909ced | 529 | |
| fneirab | 11:bdbd3104995b | 530 | ret = readReg(ATTTE_REG, atTTE_data); |
| fneirab | 11:bdbd3104995b | 531 | if (ret < F_SUCCESS_0) |
| fneirab | 11:bdbd3104995b | 532 | return ret; //Check for errors |
| fneirab | 7:479a36909ced | 533 | else |
| fneirab | 12:519a18fc3b28 | 534 | f_atTTE_data = ((float)atTTE_data * 5.625); /* TTE LSB: 5.625 sec */ |
| fneirab | 7:479a36909ced | 535 | |
| fneirab | 12:519a18fc3b28 | 536 | return f_atTTE_data; |
| fneirab | 7:479a36909ced | 537 | } |
| fneirab | 7:479a36909ced | 538 | |
| fneirab | 8:ca8765c30ed2 | 539 | /** |
| fneirab | 11:bdbd3104995b | 540 | * @brief Get the Time to Full(TTE) values Function for MAX17055 Fuel Gauge. |
| fneirab | 11:bdbd3104995b | 541 | * @par Details |
| fneirab | 11:bdbd3104995b | 542 | * This function sends a request to access the internal register of the MAX17055 |
| fneirab | 11:bdbd3104995b | 543 | * The TTF register holds the estimated time to full for the application |
| fneirab | 11:bdbd3104995b | 544 | * under present conditions. The TTF value is determined by learning the |
| fneirab | 11:bdbd3104995b | 545 | * constant current and constant voltage portions of the charge cycle based |
| fneirab | 11:bdbd3104995b | 546 | * on experience of prior charge cycles. Time to full is then estimate |
| fneirab | 11:bdbd3104995b | 547 | * by comparing present charge current to the charge termination current. |
| fneirab | 11:bdbd3104995b | 548 | * Operation of the TTF register assumes all charge profiles are consistent in the application. |
| fneirab | 11:bdbd3104995b | 549 | * |
| fneirab | 11:bdbd3104995b | 550 | * @retval ttf_data - Time to Full data from the TTF register in seconds. |
| fneirab | 11:bdbd3104995b | 551 | * @retval non-0 negative values check for errors |
| fneirab | 11:bdbd3104995b | 552 | */ |
| fneirab | 12:519a18fc3b28 | 553 | float MAX17055::get_TTF() |
| fneirab | 8:ca8765c30ed2 | 554 | { |
| fneirab | 8:ca8765c30ed2 | 555 | |
| fneirab | 8:ca8765c30ed2 | 556 | int ret; |
| fneirab | 8:ca8765c30ed2 | 557 | uint16_t ttf_data; |
| fneirab | 12:519a18fc3b28 | 558 | float f_ttf_data; |
| fneirab | 8:ca8765c30ed2 | 559 | |
| fneirab | 8:ca8765c30ed2 | 560 | ret = readReg(TTF_REG, ttf_data); |
| fneirab | 11:bdbd3104995b | 561 | if (ret < F_SUCCESS_0) |
| fneirab | 8:ca8765c30ed2 | 562 | return ret; |
| fneirab | 8:ca8765c30ed2 | 563 | else |
| fneirab | 12:519a18fc3b28 | 564 | f_ttf_data = ((float)ttf_data * 5.625); /* TTE LSB: 5.625 sec */ |
| fneirab | 8:ca8765c30ed2 | 565 | |
| fneirab | 12:519a18fc3b28 | 566 | return f_ttf_data; |
| fneirab | 8:ca8765c30ed2 | 567 | } |
| fneirab | 7:479a36909ced | 568 | |
| fneirab | 7:479a36909ced | 569 | /** |
| fneirab | 11:bdbd3104995b | 570 | * @brief Get voltage of the cell Function for MAX17055 Fuel Gauge. |
| fneirab | 11:bdbd3104995b | 571 | * @par Details |
| fneirab | 11:bdbd3104995b | 572 | * This function sends a request to access the VCell Register |
| fneirab | 11:bdbd3104995b | 573 | * of the MAX17055 to read the measured voltage from the cell. |
| fneirab | 11:bdbd3104995b | 574 | * |
| fneirab | 11:bdbd3104995b | 575 | * @retval vcell_data - vcell data from the VCELL_REG register in uVolts. |
| fneirab | 11:bdbd3104995b | 576 | * @retval non-0 negative values check for errors |
| fneirab | 11:bdbd3104995b | 577 | */ |
| fneirab | 7:479a36909ced | 578 | int MAX17055::get_Vcell() |
| fneirab | 7:479a36909ced | 579 | { |
| fneirab | 7:479a36909ced | 580 | |
| fneirab | 7:479a36909ced | 581 | int ret; |
| fneirab | 7:479a36909ced | 582 | uint16_t vcell_data; |
| fneirab | 7:479a36909ced | 583 | |
| fneirab | 7:479a36909ced | 584 | ret = readReg(VCELL_REG, vcell_data); |
| fneirab | 11:bdbd3104995b | 585 | if (ret < F_SUCCESS_0) |
| fneirab | 7:479a36909ced | 586 | return ret; |
| fneirab | 7:479a36909ced | 587 | else |
| fneirab | 7:479a36909ced | 588 | ret = lsb_to_uvolts(vcell_data); |
| fneirab | 7:479a36909ced | 589 | return ret; |
| fneirab | 7:479a36909ced | 590 | } |
| fneirab | 7:479a36909ced | 591 | |
| fneirab | 7:479a36909ced | 592 | /** |
| fneirab | 11:bdbd3104995b | 593 | * @brief Get current Function for MAX17055 Fuel Gauge. |
| fneirab | 11:bdbd3104995b | 594 | * @par Details |
| fneirab | 11:bdbd3104995b | 595 | * This function sends a request to access the CURRENT register |
| fneirab | 12:519a18fc3b28 | 596 | * of the MAX17055 to read the current readings. |
| fneirab | 11:bdbd3104995b | 597 | * |
| fneirab | 12:519a18fc3b28 | 598 | * @param[in] des_data - Plataform_data struct with information about the design. |
| fneirab | 11:bdbd3104995b | 599 | * |
| fneirab | 11:bdbd3104995b | 600 | * @retval curr_data - current data from the CURRENT register in uAmps. |
| fneirab | 11:bdbd3104995b | 601 | * @retval non-0 negative values check for errors. |
| fneirab | 11:bdbd3104995b | 602 | */ |
| fneirab | 7:479a36909ced | 603 | int MAX17055::get_Current( platform_data des_data ) |
| fneirab | 7:479a36909ced | 604 | { |
| fneirab | 7:479a36909ced | 605 | |
| fneirab | 7:479a36909ced | 606 | int ret,design_rsense; |
| fneirab | 11:bdbd3104995b | 607 | uint16_t curr_data; |
| fneirab | 7:479a36909ced | 608 | |
| fneirab | 11:bdbd3104995b | 609 | ret = readReg(CURRENT_REG, curr_data); |
| fneirab | 11:bdbd3104995b | 610 | if (ret < F_SUCCESS_0) |
| fneirab | 7:479a36909ced | 611 | return ret; |
| fneirab | 7:479a36909ced | 612 | else |
| fneirab | 7:479a36909ced | 613 | design_rsense = des_data.rsense; |
| fneirab | 11:bdbd3104995b | 614 | ret = raw_current_to_uamps((uint32_t)curr_data, design_rsense); |
| fneirab | 7:479a36909ced | 615 | return ret; |
| fneirab | 7:479a36909ced | 616 | } |
| fneirab | 7:479a36909ced | 617 | |
| fneirab | 7:479a36909ced | 618 | /** |
| fneirab | 11:bdbd3104995b | 619 | * @brief Get average current Function for MAX17055 Fuel Gauge. |
| fneirab | 11:bdbd3104995b | 620 | * @par Details |
| fneirab | 11:bdbd3104995b | 621 | * This function sends a request to access the aveCURRENT register |
| fneirab | 12:519a18fc3b28 | 622 | * of the MAX17055 to read the average current readings. |
| fneirab | 11:bdbd3104995b | 623 | * |
| fneirab | 12:519a18fc3b28 | 624 | * @param[in] des_data - Plataform_data struct with information about the design. |
| fneirab | 11:bdbd3104995b | 625 | * |
| fneirab | 11:bdbd3104995b | 626 | * @retval aveCurr_data - current data from the AVGCURRENT register in uAmps. |
| fneirab | 11:bdbd3104995b | 627 | * @retval non-0 negative values check for errors. |
| fneirab | 11:bdbd3104995b | 628 | */ |
| fneirab | 7:479a36909ced | 629 | int MAX17055::get_AvgCurrent( platform_data des_data ) |
| fneirab | 7:479a36909ced | 630 | { |
| fneirab | 7:479a36909ced | 631 | int ret, design_rsense; |
| fneirab | 7:479a36909ced | 632 | uint16_t data; |
| fneirab | 7:479a36909ced | 633 | uint32_t aveCurr_data; |
| fneirab | 7:479a36909ced | 634 | |
| fneirab | 7:479a36909ced | 635 | ret = readReg(AVGCURRENT_REG, data); |
| fneirab | 11:bdbd3104995b | 636 | if (ret < F_SUCCESS_0) |
| fneirab | 7:479a36909ced | 637 | return ret; |
| fneirab | 7:479a36909ced | 638 | else |
| fneirab | 7:479a36909ced | 639 | aveCurr_data = data; |
| fneirab | 7:479a36909ced | 640 | design_rsense = des_data.rsense; |
| fneirab | 7:479a36909ced | 641 | aveCurr_data = raw_current_to_uamps(aveCurr_data, design_rsense); |
| fneirab | 7:479a36909ced | 642 | return aveCurr_data; |
| fneirab | 7:479a36909ced | 643 | } |
| fneirab | 7:479a36909ced | 644 | |
| fneirab | 7:479a36909ced | 645 | /** |
| fneirab | 12:519a18fc3b28 | 646 | * @brief lsb_to_uvolts Conversion Function |
| fneirab | 11:bdbd3104995b | 647 | * @par Details |
| fneirab | 11:bdbd3104995b | 648 | * This function takes the lsb value of the register and convert it |
| fneirab | 11:bdbd3104995b | 649 | * to uvolts |
| fneirab | 11:bdbd3104995b | 650 | * |
| fneirab | 11:bdbd3104995b | 651 | * @param[in] lsb - value of register lsb |
| fneirab | 11:bdbd3104995b | 652 | * @retval conv_2_uvolts - value converted lsb to uvolts |
| fneirab | 11:bdbd3104995b | 653 | */ |
| fneirab | 7:479a36909ced | 654 | int MAX17055:: lsb_to_uvolts(uint16_t lsb) |
| fneirab | 7:479a36909ced | 655 | { |
| fneirab | 11:bdbd3104995b | 656 | int conv_2_uvolts; |
| fneirab | 11:bdbd3104995b | 657 | conv_2_uvolts = (lsb * 625) / 8; /* 78.125uV per bit */ |
| fneirab | 11:bdbd3104995b | 658 | return conv_2_uvolts; |
| fneirab | 7:479a36909ced | 659 | } |
| fneirab | 7:479a36909ced | 660 | |
| fneirab | 7:479a36909ced | 661 | /** |
| fneirab | 12:519a18fc3b28 | 662 | * @brief raw_current_to_uamp Conversion Function |
| fneirab | 11:bdbd3104995b | 663 | * @par Details |
| fneirab | 11:bdbd3104995b | 664 | * This function takes the raw current value of the register and |
| fneirab | 11:bdbd3104995b | 665 | * converts it to uamps |
| fneirab | 11:bdbd3104995b | 666 | * |
| fneirab | 11:bdbd3104995b | 667 | * @param[in] curr - raw current value of register |
| fneirab | 11:bdbd3104995b | 668 | * @retval res - converted raw current to uamps (Signed 2's complement) |
| fneirab | 11:bdbd3104995b | 669 | */ |
| fneirab | 7:479a36909ced | 670 | int MAX17055::raw_current_to_uamps(uint32_t curr, int rsense_value) |
| fneirab | 7:479a36909ced | 671 | { |
| fneirab | 7:479a36909ced | 672 | int res = curr; |
| fneirab | 7:479a36909ced | 673 | /* Negative */ |
| fneirab | 7:479a36909ced | 674 | if (res & 0x8000) { |
| fneirab | 7:479a36909ced | 675 | res |= 0xFFFF0000; |
| fneirab | 7:479a36909ced | 676 | } else { |
| fneirab | 12:519a18fc3b28 | 677 | res *= 1562500 /(rsense_value * 1000); //Change to interact with the rsense implemented in the design |
| fneirab | 7:479a36909ced | 678 | } |
| fneirab | 7:479a36909ced | 679 | return res; |
| fneirab | 9:f29d5e49b190 | 680 | } |
| fneirab | 9:f29d5e49b190 | 681 | |
| fneirab | 9:f29d5e49b190 | 682 | /** |
| fneirab | 11:bdbd3104995b | 683 | * @brief Save Learned Parameters Function for battery Fuel Gauge model. |
| fneirab | 11:bdbd3104995b | 684 | * @par Details |
| fneirab | 11:bdbd3104995b | 685 | * It is recommended to save the learned capacity parameters every |
| fneirab | 11:bdbd3104995b | 686 | * time bit 2 of the Cycles register toggles |
| fneirab | 11:bdbd3104995b | 687 | * (so that it is saved every 64% change in the battery) |
| fneirab | 11:bdbd3104995b | 688 | * so that if power is lost the values can easily be restored. |
| fneirab | 11:bdbd3104995b | 689 | * |
| fneirab | 11:bdbd3104995b | 690 | * @param[in] FG_params Fuel Gauge Parameters based on design details. |
| fneirab | 11:bdbd3104995b | 691 | * |
| fneirab | 11:bdbd3104995b | 692 | * @retval 0 for success |
| fneirab | 11:bdbd3104995b | 693 | * @retval non-0 negative for errors |
| fneirab | 11:bdbd3104995b | 694 | */ |
| fneirab | 9:f29d5e49b190 | 695 | int MAX17055::save_Params(saved_FG_params_t FG_params) |
| fneirab | 9:f29d5e49b190 | 696 | { |
| fneirab | 11:bdbd3104995b | 697 | int ret, value; |
| fneirab | 9:f29d5e49b190 | 698 | uint16_t data[5]; |
| fneirab | 11:bdbd3104995b | 699 | ///STEP 1. Checks if the cycel register bit 2 has changed. |
| fneirab | 11:bdbd3104995b | 700 | ret = readReg(CYCLES_REG, data[3]); |
| fneirab | 11:bdbd3104995b | 701 | if (ret < F_SUCCESS_0) |
| fneirab | 11:bdbd3104995b | 702 | return ret; |
| fneirab | 11:bdbd3104995b | 703 | else { |
| fneirab | 11:bdbd3104995b | 704 | value = data[3]; |
| fneirab | 11:bdbd3104995b | 705 | } |
| fneirab | 11:bdbd3104995b | 706 | |
| fneirab | 12:519a18fc3b28 | 707 | ///STEP 2. Save the capacity parameters for the specific battery. |
| fneirab | 9:f29d5e49b190 | 708 | ret = readReg(RCOMP0_REG, data[0]); |
| fneirab | 11:bdbd3104995b | 709 | if (ret < F_SUCCESS_0) |
| fneirab | 9:f29d5e49b190 | 710 | return ret; |
| fneirab | 9:f29d5e49b190 | 711 | else |
| fneirab | 9:f29d5e49b190 | 712 | FG_params.rcomp0 = data[0]; |
| fneirab | 9:f29d5e49b190 | 713 | |
| fneirab | 9:f29d5e49b190 | 714 | ret = readReg(TEMPCO_REG, data[1]); |
| fneirab | 11:bdbd3104995b | 715 | if (ret < F_SUCCESS_0) |
| fneirab | 9:f29d5e49b190 | 716 | return ret; |
| fneirab | 9:f29d5e49b190 | 717 | else |
| fneirab | 9:f29d5e49b190 | 718 | FG_params.temp_co = data[1]; |
| fneirab | 9:f29d5e49b190 | 719 | |
| fneirab | 9:f29d5e49b190 | 720 | ret = readReg(FULLCAPREP_REG, data[2]); |
| fneirab | 11:bdbd3104995b | 721 | if (ret < F_SUCCESS_0) |
| fneirab | 9:f29d5e49b190 | 722 | return ret; |
| fneirab | 9:f29d5e49b190 | 723 | else |
| fneirab | 9:f29d5e49b190 | 724 | FG_params.full_cap_rep = data[2]; |
| fneirab | 9:f29d5e49b190 | 725 | |
| fneirab | 11:bdbd3104995b | 726 | FG_params.cycles = data[3]; |
| fneirab | 9:f29d5e49b190 | 727 | |
| fneirab | 9:f29d5e49b190 | 728 | ret = readReg(FULLCAPNOM_REG, data[4]); |
| fneirab | 11:bdbd3104995b | 729 | if (ret < F_SUCCESS_0) |
| fneirab | 9:f29d5e49b190 | 730 | return ret; |
| fneirab | 9:f29d5e49b190 | 731 | else |
| fneirab | 9:f29d5e49b190 | 732 | FG_params.full_cap_nom = data[4]; |
| fneirab | 9:f29d5e49b190 | 733 | return ret; |
| fneirab | 9:f29d5e49b190 | 734 | } |
| fneirab | 9:f29d5e49b190 | 735 | |
| fneirab | 9:f29d5e49b190 | 736 | /** |
| fneirab | 12:519a18fc3b28 | 737 | * @brief Restore Parameters Function for battery Fuel Gauge model. |
| fneirab | 11:bdbd3104995b | 738 | * @par Details |
| fneirab | 11:bdbd3104995b | 739 | * If power is lost, then the capacity information |
| fneirab | 11:bdbd3104995b | 740 | * can be easily restored with this function. |
| fneirab | 11:bdbd3104995b | 741 | * |
| fneirab | 11:bdbd3104995b | 742 | * @param[in] FG_params Struct for Fuel Gauge Parameters |
| fneirab | 11:bdbd3104995b | 743 | * @retval 0 for success |
| fneirab | 11:bdbd3104995b | 744 | * @retval non-0 negative for errors |
| fneirab | 11:bdbd3104995b | 745 | */ |
| fneirab | 9:f29d5e49b190 | 746 | int MAX17055::restore_Params(saved_FG_params_t FG_params) |
| fneirab | 9:f29d5e49b190 | 747 | { |
| fneirab | 9:f29d5e49b190 | 748 | int ret; |
| fneirab | 9:f29d5e49b190 | 749 | uint16_t temp_data, fullcapnom_data, mixCap_calc, dQacc_calc; |
| fneirab | 12:519a18fc3b28 | 750 | uint16_t dPacc_value = 0x0C80;//Set it to 200% |
| fneirab | 9:f29d5e49b190 | 751 | |
| fneirab | 11:bdbd3104995b | 752 | ///STEP 1. Restoring capacity parameters |
| fneirab | 9:f29d5e49b190 | 753 | write_and_verify_reg(RCOMP0_REG, FG_params.rcomp0); |
| fneirab | 9:f29d5e49b190 | 754 | write_and_verify_reg(TEMPCO_REG, FG_params.temp_co); |
| fneirab | 9:f29d5e49b190 | 755 | write_and_verify_reg(FULLCAPNOM_REG, FG_params.full_cap_nom); |
| fneirab | 9:f29d5e49b190 | 756 | |
| fneirab | 11:bdbd3104995b | 757 | wait_ms(350);//check the type of wait |
| fneirab | 11:bdbd3104995b | 758 | |
| fneirab | 11:bdbd3104995b | 759 | ///STEP 2. Restore FullCap |
| fneirab | 9:f29d5e49b190 | 760 | ret = readReg(FULLCAPNOM_REG, fullcapnom_data); |
| fneirab | 11:bdbd3104995b | 761 | if (ret < F_SUCCESS_0) |
| fneirab | 9:f29d5e49b190 | 762 | return ret; |
| fneirab | 9:f29d5e49b190 | 763 | |
| fneirab | 12:519a18fc3b28 | 764 | ret = readReg(MIXSOC_REG, temp_data); //check if Error in software guide register incorrect |
| fneirab | 11:bdbd3104995b | 765 | if (ret < F_SUCCESS_0) |
| fneirab | 9:f29d5e49b190 | 766 | return ret; |
| fneirab | 9:f29d5e49b190 | 767 | |
| fneirab | 9:f29d5e49b190 | 768 | mixCap_calc = (temp_data*fullcapnom_data)/25600; |
| fneirab | 9:f29d5e49b190 | 769 | |
| fneirab | 9:f29d5e49b190 | 770 | write_and_verify_reg(MIXCAP_REG, mixCap_calc); |
| fneirab | 9:f29d5e49b190 | 771 | write_and_verify_reg(FULLCAPREP_REG, FG_params.full_cap_rep); |
| fneirab | 9:f29d5e49b190 | 772 | |
| fneirab | 11:bdbd3104995b | 773 | ///STEP 3. Write DQACC to 200% of Capacity and DPACC to 200% |
| fneirab | 9:f29d5e49b190 | 774 | dQacc_calc = (FG_params.full_cap_nom/ 16) ; |
| fneirab | 9:f29d5e49b190 | 775 | |
| fneirab | 9:f29d5e49b190 | 776 | write_and_verify_reg(DPACC_REG, dPacc_value); |
| fneirab | 9:f29d5e49b190 | 777 | write_and_verify_reg(DQACC_REG, dQacc_calc); |
| fneirab | 9:f29d5e49b190 | 778 | |
| fneirab | 9:f29d5e49b190 | 779 | wait_ms(350); |
| fneirab | 9:f29d5e49b190 | 780 | |
| fneirab | 11:bdbd3104995b | 781 | ///STEP 4. Restore Cycles register |
| fneirab | 9:f29d5e49b190 | 782 | ret = write_and_verify_reg(CYCLES_REG, FG_params.cycles); |
| fneirab | 11:bdbd3104995b | 783 | if (ret < F_SUCCESS_0) |
| fneirab | 9:f29d5e49b190 | 784 | return ret; |
| fneirab | 11:bdbd3104995b | 785 | return ret; |
| fneirab | 11:bdbd3104995b | 786 | } |
| fneirab | 11:bdbd3104995b | 787 | |
| fneirab | 11:bdbd3104995b | 788 | /** |
| fneirab | 11:bdbd3104995b | 789 | * @brief Function to Save Average Current to At Rate register. |
| fneirab | 11:bdbd3104995b | 790 | * @par Details |
| fneirab | 12:519a18fc3b28 | 791 | * For User friendliness display of atTTE, atAvSOC, atAvCAP |
| fneirab | 11:bdbd3104995b | 792 | * write the average current to At Rate registers every 10sec |
| fneirab | 11:bdbd3104995b | 793 | * when the battery is in use. |
| fneirab | 11:bdbd3104995b | 794 | * NOTE: do not use this function when the Battery is charging. |
| fneirab | 11:bdbd3104995b | 795 | * |
| fneirab | 11:bdbd3104995b | 796 | * @retval 0 for success |
| fneirab | 11:bdbd3104995b | 797 | * @retval non-0 negative for errors |
| fneirab | 11:bdbd3104995b | 798 | */ |
| fneirab | 11:bdbd3104995b | 799 | int MAX17055::avCurr_2_atRate() |
| fneirab | 11:bdbd3104995b | 800 | { |
| fneirab | 11:bdbd3104995b | 801 | int ret; |
| fneirab | 11:bdbd3104995b | 802 | uint16_t avCurr_data; |
| fneirab | 11:bdbd3104995b | 803 | |
| fneirab | 11:bdbd3104995b | 804 | ret = readReg(AVGCURRENT_REG, avCurr_data); |
| fneirab | 12:519a18fc3b28 | 805 | if (ret < F_SUCCESS_0){ |
| fneirab | 12:519a18fc3b28 | 806 | return ret = -3; |
| fneirab | 12:519a18fc3b28 | 807 | } |
| fneirab | 11:bdbd3104995b | 808 | |
| fneirab | 11:bdbd3104995b | 809 | //Write avCurrent to atRate Register |
| fneirab | 12:519a18fc3b28 | 810 | ret = writeReg(ATRATE_REG, avCurr_data); |
| fneirab | 12:519a18fc3b28 | 811 | if (ret < F_SUCCESS_0){ |
| fneirab | 11:bdbd3104995b | 812 | return ret; |
| fneirab | 12:519a18fc3b28 | 813 | } |
| fneirab | 12:519a18fc3b28 | 814 | return F_SUCCESS_0; |
| fneirab | 7:479a36909ced | 815 | } |