This class provides APIs to all of the registers of the TI BQ35100 battery gauge, as used on the u-blox C030 primary battery shield.
Dependents: example-battery-gauge-bq35100
bq35100.cpp@2:4c699a813451, 2017-11-10 (annotated)
- Committer:
- RobMeades
- Date:
- Fri Nov 10 17:07:06 2017 +0000
- Revision:
- 2:4c699a813451
- Parent:
- 1:ee7cc8d75283
Functionality at equivalent level to the BQ27411 battery driver. Good enough for now.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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RobMeades | 0:cec745c014b7 | 1 | /* mbed Microcontroller Library |
RobMeades | 0:cec745c014b7 | 2 | * Copyright (c) 2017 u-blox |
RobMeades | 0:cec745c014b7 | 3 | * |
RobMeades | 0:cec745c014b7 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
RobMeades | 0:cec745c014b7 | 5 | * you may not use this file except in compliance with the License. |
RobMeades | 0:cec745c014b7 | 6 | * You may obtain a copy of the License at |
RobMeades | 0:cec745c014b7 | 7 | * |
RobMeades | 0:cec745c014b7 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
RobMeades | 0:cec745c014b7 | 9 | * |
RobMeades | 0:cec745c014b7 | 10 | * Unless required by applicable law or agreed to in writing, software |
RobMeades | 0:cec745c014b7 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
RobMeades | 0:cec745c014b7 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
RobMeades | 0:cec745c014b7 | 13 | * See the License for the specific language governing permissions and |
RobMeades | 0:cec745c014b7 | 14 | * limitations under the License. |
RobMeades | 0:cec745c014b7 | 15 | */ |
RobMeades | 0:cec745c014b7 | 16 | |
RobMeades | 0:cec745c014b7 | 17 | /** |
RobMeades | 0:cec745c014b7 | 18 | * @file bq35100.cpp |
RobMeades | 0:cec745c014b7 | 19 | * This file defines the API to the TI BQ35100 battery gauge chip. |
RobMeades | 0:cec745c014b7 | 20 | */ |
RobMeades | 0:cec745c014b7 | 21 | |
RobMeades | 0:cec745c014b7 | 22 | /** Define these to print debug information. */ |
RobMeades | 2:4c699a813451 | 23 | //#define DEBUG_BQ35100 |
RobMeades | 2:4c699a813451 | 24 | //#define DEBUG_BQ35100_BLOCK_DATA |
RobMeades | 0:cec745c014b7 | 25 | |
RobMeades | 0:cec745c014b7 | 26 | #include <mbed.h> |
RobMeades | 0:cec745c014b7 | 27 | #include <battery_gauge_bq35100.h> |
RobMeades | 0:cec745c014b7 | 28 | |
RobMeades | 0:cec745c014b7 | 29 | #ifdef DEBUG_BQ35100 |
RobMeades | 0:cec745c014b7 | 30 | # include <stdio.h> |
RobMeades | 0:cec745c014b7 | 31 | #endif |
RobMeades | 0:cec745c014b7 | 32 | |
RobMeades | 0:cec745c014b7 | 33 | // ---------------------------------------------------------------- |
RobMeades | 0:cec745c014b7 | 34 | // COMPILE-TIME MACROS |
RobMeades | 0:cec745c014b7 | 35 | // ---------------------------------------------------------------- |
RobMeades | 0:cec745c014b7 | 36 | |
RobMeades | 1:ee7cc8d75283 | 37 | /** How long to wait for a security mode change to succeed. */ |
RobMeades | 1:ee7cc8d75283 | 38 | #define SET_SECURITY_MODE_RETRY_SECONDS 5 |
RobMeades | 1:ee7cc8d75283 | 39 | |
RobMeades | 2:4c699a813451 | 40 | /** How long to wait for accumulated capacity data to be written |
RobMeades | 2:4c699a813451 | 41 | * to data flash when gauging is disabled */ |
RobMeades | 2:4c699a813451 | 42 | #define GAUGE_COMPLETE_WAIT_MS 10000 |
RobMeades | 2:4c699a813451 | 43 | |
RobMeades | 0:cec745c014b7 | 44 | // ---------------------------------------------------------------- |
RobMeades | 0:cec745c014b7 | 45 | // GENERIC PRIVATE FUNCTIONS |
RobMeades | 0:cec745c014b7 | 46 | // ---------------------------------------------------------------- |
RobMeades | 0:cec745c014b7 | 47 | |
RobMeades | 0:cec745c014b7 | 48 | // Read two bytes from an address. |
RobMeades | 0:cec745c014b7 | 49 | // Note: gpI2c should be locked before this is called. |
RobMeades | 2:4c699a813451 | 50 | bool BatteryGaugeBq35100::getTwoBytes(uint8_t registerAddress, uint16_t *pBytes) |
RobMeades | 0:cec745c014b7 | 51 | { |
RobMeades | 0:cec745c014b7 | 52 | bool success = false; |
RobMeades | 0:cec745c014b7 | 53 | char data[3]; |
RobMeades | 0:cec745c014b7 | 54 | |
RobMeades | 0:cec745c014b7 | 55 | if (gpI2c != NULL) { |
RobMeades | 0:cec745c014b7 | 56 | data[0] = registerAddress; |
RobMeades | 0:cec745c014b7 | 57 | data[1] = 0; |
RobMeades | 0:cec745c014b7 | 58 | data[2] = 0; |
RobMeades | 0:cec745c014b7 | 59 | |
RobMeades | 1:ee7cc8d75283 | 60 | // Send a command to read from registerAddress |
RobMeades | 1:ee7cc8d75283 | 61 | if ((gpI2c->write(gAddress, &(data[0]), 1, true) == 0) && |
RobMeades | 0:cec745c014b7 | 62 | (gpI2c->read(gAddress, &(data[1]), 2) == 0)) { |
RobMeades | 0:cec745c014b7 | 63 | success = true; |
RobMeades | 0:cec745c014b7 | 64 | if (pBytes) { |
RobMeades | 0:cec745c014b7 | 65 | *pBytes = (((uint16_t) data[2]) << 8) + data[1]; |
RobMeades | 0:cec745c014b7 | 66 | } |
RobMeades | 0:cec745c014b7 | 67 | } |
RobMeades | 0:cec745c014b7 | 68 | } |
RobMeades | 0:cec745c014b7 | 69 | |
RobMeades | 0:cec745c014b7 | 70 | return success; |
RobMeades | 0:cec745c014b7 | 71 | } |
RobMeades | 0:cec745c014b7 | 72 | |
RobMeades | 1:ee7cc8d75283 | 73 | // Compute the checksum over an address plus the block of data. |
RobMeades | 2:4c699a813451 | 74 | uint8_t BatteryGaugeBq35100::computeChecksum(const char * pData, int32_t length) |
RobMeades | 1:ee7cc8d75283 | 75 | { |
RobMeades | 1:ee7cc8d75283 | 76 | uint8_t checkSum = 0; |
RobMeades | 1:ee7cc8d75283 | 77 | uint8_t x = 0; |
RobMeades | 1:ee7cc8d75283 | 78 | |
RobMeades | 1:ee7cc8d75283 | 79 | if (pData != NULL) { |
RobMeades | 1:ee7cc8d75283 | 80 | #ifdef DEBUG_BQ35100_BLOCK_DATA |
RobMeades | 1:ee7cc8d75283 | 81 | printf ("BatteryGaugeBq35100 (I2C 0x%02x): computing check sum on data block.\n", gAddress >> 1); |
RobMeades | 1:ee7cc8d75283 | 82 | printf (" 0 1 2 3 4 5 6 7 8 9 A B C D E F\n"); |
RobMeades | 1:ee7cc8d75283 | 83 | #endif |
RobMeades | 1:ee7cc8d75283 | 84 | for (x = 1; x <= length; x++) { |
RobMeades | 1:ee7cc8d75283 | 85 | checkSum += *pData; |
RobMeades | 1:ee7cc8d75283 | 86 | |
RobMeades | 1:ee7cc8d75283 | 87 | #ifdef DEBUG_BQ35100_BLOCK_DATA |
RobMeades | 1:ee7cc8d75283 | 88 | if (x % 16 == 8) { |
RobMeades | 1:ee7cc8d75283 | 89 | printf ("%02x ", *pData); |
RobMeades | 1:ee7cc8d75283 | 90 | } else if (x % 16 == 0) { |
RobMeades | 1:ee7cc8d75283 | 91 | printf ("%02x\n", *pData); |
RobMeades | 1:ee7cc8d75283 | 92 | } else { |
RobMeades | 1:ee7cc8d75283 | 93 | printf ("%02x-", *pData); |
RobMeades | 1:ee7cc8d75283 | 94 | } |
RobMeades | 1:ee7cc8d75283 | 95 | #endif |
RobMeades | 1:ee7cc8d75283 | 96 | pData++; |
RobMeades | 1:ee7cc8d75283 | 97 | } |
RobMeades | 1:ee7cc8d75283 | 98 | |
RobMeades | 1:ee7cc8d75283 | 99 | checkSum = 0xff - checkSum; |
RobMeades | 1:ee7cc8d75283 | 100 | } |
RobMeades | 1:ee7cc8d75283 | 101 | |
RobMeades | 1:ee7cc8d75283 | 102 | #ifdef DEBUG_BQ35100_BLOCK_DATA |
RobMeades | 1:ee7cc8d75283 | 103 | if (x % 16 != 1) { |
RobMeades | 1:ee7cc8d75283 | 104 | printf("\n"); |
RobMeades | 1:ee7cc8d75283 | 105 | } |
RobMeades | 1:ee7cc8d75283 | 106 | |
RobMeades | 1:ee7cc8d75283 | 107 | printf ("BatteryGaugeBq35100 (I2C 0x%02x): check sum is 0x%02x.\n", gAddress >> 1, checkSum); |
RobMeades | 1:ee7cc8d75283 | 108 | #endif |
RobMeades | 1:ee7cc8d75283 | 109 | |
RobMeades | 1:ee7cc8d75283 | 110 | return checkSum; |
RobMeades | 1:ee7cc8d75283 | 111 | } |
RobMeades | 1:ee7cc8d75283 | 112 | |
RobMeades | 1:ee7cc8d75283 | 113 | // Read data of a given length from a given address. |
RobMeades | 1:ee7cc8d75283 | 114 | // Note: gpI2c should be locked before this is called. |
RobMeades | 2:4c699a813451 | 115 | bool BatteryGaugeBq35100::readExtendedData(int32_t address, char * pData, int32_t length) |
RobMeades | 1:ee7cc8d75283 | 116 | { |
RobMeades | 1:ee7cc8d75283 | 117 | int32_t lengthRead; |
RobMeades | 1:ee7cc8d75283 | 118 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 119 | SecurityMode securityMode = getSecurityMode(); |
RobMeades | 1:ee7cc8d75283 | 120 | char block[32 + 2 + 2]; // 32 bytes of data, 2 bytes of address, |
RobMeades | 1:ee7cc8d75283 | 121 | // 1 byte of MACDataSum and 1 byte of MACDataLen |
RobMeades | 1:ee7cc8d75283 | 122 | char data[3]; |
RobMeades | 1:ee7cc8d75283 | 123 | |
RobMeades | 1:ee7cc8d75283 | 124 | // Handle security mode |
RobMeades | 1:ee7cc8d75283 | 125 | if (setSecurityMode(SECURITY_MODE_UNSEALED)) { |
RobMeades | 1:ee7cc8d75283 | 126 | if ((gpI2c != NULL) && (length <= 32) && (address >= 0x4000) && (address < 0x4400) && (pData != NULL)) { |
RobMeades | 1:ee7cc8d75283 | 127 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 128 | printf("BatteryGaugeBq35100 (I2C 0x%02x): preparing to read %d byte(s) from address 0x%04x.\n", gAddress >> 1, (int) length, (unsigned int) address); |
RobMeades | 1:ee7cc8d75283 | 129 | #endif |
RobMeades | 1:ee7cc8d75283 | 130 | // Enable Block Data Control (0x61) |
RobMeades | 1:ee7cc8d75283 | 131 | data[0] = 0x61; |
RobMeades | 1:ee7cc8d75283 | 132 | data[1] = 0; |
RobMeades | 1:ee7cc8d75283 | 133 | |
RobMeades | 1:ee7cc8d75283 | 134 | if (gpI2c->write(gAddress, &(data[0]), 2) == 0) { |
RobMeades | 1:ee7cc8d75283 | 135 | // Write address to ManufacturerAccessControl (0x3e) |
RobMeades | 1:ee7cc8d75283 | 136 | data[0] = 0x3e; |
RobMeades | 1:ee7cc8d75283 | 137 | data[1] = (char) address; |
RobMeades | 1:ee7cc8d75283 | 138 | data[2] = (char) (address >> 8); |
RobMeades | 1:ee7cc8d75283 | 139 | |
RobMeades | 1:ee7cc8d75283 | 140 | if (gpI2c->write(gAddress, &(data[0]), 3) == 0) { |
RobMeades | 1:ee7cc8d75283 | 141 | // Read the address from ManufacturerAccessControl (0x3e then 0x3f), |
RobMeades | 1:ee7cc8d75283 | 142 | // data from MACData (0x40 to 0x5f), checksum from MACDataSum (0x60) |
RobMeades | 1:ee7cc8d75283 | 143 | // and length from MACDataLen (0x61) |
RobMeades | 1:ee7cc8d75283 | 144 | if ((gpI2c->write(gAddress, &(data[0]), 1, true) == 0) && |
RobMeades | 1:ee7cc8d75283 | 145 | (gpI2c->read(gAddress, &(block[0]), sizeof (block)) == 0)) { |
RobMeades | 1:ee7cc8d75283 | 146 | // Check that the address matches |
RobMeades | 1:ee7cc8d75283 | 147 | if ((block[0] == (char) address) && (block[1] == (char) (address >> 8))) { |
RobMeades | 1:ee7cc8d75283 | 148 | // Check that the checksum matches (-2 on MACDataLen as it includes MACDataSum and itself) |
RobMeades | 1:ee7cc8d75283 | 149 | if (block[34] == computeChecksum (&(block[0]), block[35] - 2)) { |
RobMeades | 1:ee7cc8d75283 | 150 | // All is good, copy the data to the user |
RobMeades | 1:ee7cc8d75283 | 151 | lengthRead = block[35] - 4; // -4 rather than -2 to remove the two bytes of address as well |
RobMeades | 1:ee7cc8d75283 | 152 | if (lengthRead > length) { |
RobMeades | 1:ee7cc8d75283 | 153 | lengthRead = length; |
RobMeades | 1:ee7cc8d75283 | 154 | } |
RobMeades | 1:ee7cc8d75283 | 155 | memcpy(pData, &(block[2]), lengthRead); |
RobMeades | 1:ee7cc8d75283 | 156 | success = true; |
RobMeades | 1:ee7cc8d75283 | 157 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 158 | printf("BatteryGaugeBq35100 (I2C 0x%02x): %d byte(s) read successfully.\n", gAddress >> 1, (int) lengthRead); |
RobMeades | 1:ee7cc8d75283 | 159 | #endif |
RobMeades | 1:ee7cc8d75283 | 160 | } else { |
RobMeades | 1:ee7cc8d75283 | 161 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 162 | printf("BatteryGaugeBq35100 (I2C 0x%02x): checksum didn't match (0x%02x expected).\n", gAddress >> 1, block[34]); |
RobMeades | 1:ee7cc8d75283 | 163 | #endif |
RobMeades | 1:ee7cc8d75283 | 164 | } |
RobMeades | 1:ee7cc8d75283 | 165 | } else { |
RobMeades | 1:ee7cc8d75283 | 166 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 167 | printf("BatteryGaugeBq35100 (I2C 0x%02x): address didn't match (expected 0x%04x, received 0x%02x%02x).\n", gAddress >> 1, (unsigned int) address, block[1], block[0]); |
RobMeades | 1:ee7cc8d75283 | 168 | #endif |
RobMeades | 1:ee7cc8d75283 | 169 | } |
RobMeades | 1:ee7cc8d75283 | 170 | } else { |
RobMeades | 1:ee7cc8d75283 | 171 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 172 | printf("BatteryGaugeBq35100 (I2C 0x%02x): unable to read %d bytes from ManufacturerAccessControl.\n", gAddress >> 1, sizeof (block)); |
RobMeades | 1:ee7cc8d75283 | 173 | #endif |
RobMeades | 1:ee7cc8d75283 | 174 | } |
RobMeades | 1:ee7cc8d75283 | 175 | } else { |
RobMeades | 1:ee7cc8d75283 | 176 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 177 | printf("BatteryGaugeBq35100 (I2C 0x%02x): unable to write %d bytes to ManufacturerAccessControl.\r", gAddress >> 1, 3); |
RobMeades | 1:ee7cc8d75283 | 178 | #endif |
RobMeades | 1:ee7cc8d75283 | 179 | } |
RobMeades | 1:ee7cc8d75283 | 180 | } else { |
RobMeades | 1:ee7cc8d75283 | 181 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 182 | printf("BatteryGaugeBq35100 (I2C 0x%02x): unable to set Block Data Control.\n", gAddress >> 1); |
RobMeades | 1:ee7cc8d75283 | 183 | #endif |
RobMeades | 1:ee7cc8d75283 | 184 | } |
RobMeades | 1:ee7cc8d75283 | 185 | } else { |
RobMeades | 1:ee7cc8d75283 | 186 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 187 | printf("BatteryGaugeBq35100 (I2C 0x%02x): unable to set the security mode of the chip.\n", gAddress >> 1); |
RobMeades | 1:ee7cc8d75283 | 188 | #endif |
RobMeades | 1:ee7cc8d75283 | 189 | } |
RobMeades | 1:ee7cc8d75283 | 190 | } |
RobMeades | 1:ee7cc8d75283 | 191 | |
RobMeades | 1:ee7cc8d75283 | 192 | // Put the security mode back to what it was |
RobMeades | 1:ee7cc8d75283 | 193 | if (!setSecurityMode(securityMode)) { |
RobMeades | 1:ee7cc8d75283 | 194 | success = false; |
RobMeades | 1:ee7cc8d75283 | 195 | } |
RobMeades | 1:ee7cc8d75283 | 196 | |
RobMeades | 1:ee7cc8d75283 | 197 | return success; |
RobMeades | 1:ee7cc8d75283 | 198 | } |
RobMeades | 1:ee7cc8d75283 | 199 | |
RobMeades | 1:ee7cc8d75283 | 200 | // Write data of a given length to a given address. |
RobMeades | 1:ee7cc8d75283 | 201 | // Note: gpI2c should be locked before this is called. |
RobMeades | 2:4c699a813451 | 202 | bool BatteryGaugeBq35100::writeExtendedData(int32_t address, const char * pData, int32_t length) |
RobMeades | 1:ee7cc8d75283 | 203 | { |
RobMeades | 1:ee7cc8d75283 | 204 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 205 | SecurityMode securityMode = getSecurityMode(); |
RobMeades | 1:ee7cc8d75283 | 206 | char data[3 + 32]; |
RobMeades | 2:4c699a813451 | 207 | uint16_t controlStatus; |
RobMeades | 1:ee7cc8d75283 | 208 | |
RobMeades | 1:ee7cc8d75283 | 209 | if ((gpI2c != NULL) && (length <= 32) && (address >= 0x4000) && (address < 0x4400) && (pData != NULL)) { |
RobMeades | 1:ee7cc8d75283 | 210 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 211 | printf("BatteryGaugeBq35100 (I2C 0x%02x): preparing to write %d byte(s) to address 0x%04x.\n", gAddress >> 1, (int) length, (unsigned int) address); |
RobMeades | 1:ee7cc8d75283 | 212 | #endif |
RobMeades | 1:ee7cc8d75283 | 213 | // Handle security mode |
RobMeades | 1:ee7cc8d75283 | 214 | if (setSecurityMode(SECURITY_MODE_UNSEALED)) { |
RobMeades | 1:ee7cc8d75283 | 215 | // Enable Block Data Control (0x61) |
RobMeades | 1:ee7cc8d75283 | 216 | data[0] = 0x61; |
RobMeades | 1:ee7cc8d75283 | 217 | data[1] = 0; |
RobMeades | 1:ee7cc8d75283 | 218 | |
RobMeades | 1:ee7cc8d75283 | 219 | if (gpI2c->write(gAddress, &(data[0]), 2) == 0) { |
RobMeades | 1:ee7cc8d75283 | 220 | // Start write at ManufacturerAccessControl (0x3e) |
RobMeades | 1:ee7cc8d75283 | 221 | data[0] = 0x3e; |
RobMeades | 1:ee7cc8d75283 | 222 | // Next two bytes are the address we will write to |
RobMeades | 1:ee7cc8d75283 | 223 | data[1] = (char) address; |
RobMeades | 1:ee7cc8d75283 | 224 | data[2] = (char) (address >> 8); |
RobMeades | 1:ee7cc8d75283 | 225 | // Remaining bytes are the data bytes we wish to write |
RobMeades | 1:ee7cc8d75283 | 226 | memcpy (&(data[3]), pData, length); |
RobMeades | 1:ee7cc8d75283 | 227 | |
RobMeades | 1:ee7cc8d75283 | 228 | if (gpI2c->write(gAddress, &(data[0]), 3 + length) == 0) { |
RobMeades | 1:ee7cc8d75283 | 229 | // Compute the checksum and write it to MACDataSum (0x60) |
RobMeades | 1:ee7cc8d75283 | 230 | data[1] = computeChecksum (&(data[1]), length + 2); |
RobMeades | 1:ee7cc8d75283 | 231 | data[0] = 0x60; |
RobMeades | 1:ee7cc8d75283 | 232 | |
RobMeades | 1:ee7cc8d75283 | 233 | if (gpI2c->write(gAddress, &(data[0]), 2) == 0) { |
RobMeades | 1:ee7cc8d75283 | 234 | // Write 4 + length to MACDataLen (0x61) |
RobMeades | 1:ee7cc8d75283 | 235 | data[1] = length + 4; |
RobMeades | 1:ee7cc8d75283 | 236 | data[0] = 0x61; |
RobMeades | 1:ee7cc8d75283 | 237 | |
RobMeades | 1:ee7cc8d75283 | 238 | if (gpI2c->write(gAddress, &(data[0]), 2) == 0) { |
RobMeades | 2:4c699a813451 | 239 | // Read the control status register to see if a bad |
RobMeades | 2:4c699a813451 | 240 | // flash write has been detected (bit 15) |
RobMeades | 2:4c699a813451 | 241 | data[0] = 0; |
RobMeades | 2:4c699a813451 | 242 | if ((gpI2c->write(gAddress, &(data[0]), 1) == 0) && |
RobMeades | 2:4c699a813451 | 243 | getTwoBytes(0, &controlStatus) && |
RobMeades | 2:4c699a813451 | 244 | (((controlStatus >> 15) & 0x01) != 0x01)) { |
RobMeades | 2:4c699a813451 | 245 | success = true; |
RobMeades | 2:4c699a813451 | 246 | } |
RobMeades | 1:ee7cc8d75283 | 247 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 248 | printf("BatteryGaugeBq35100 (I2C 0x%02x): write successful.\n", gAddress >> 1); |
RobMeades | 1:ee7cc8d75283 | 249 | #endif |
RobMeades | 1:ee7cc8d75283 | 250 | } else { |
RobMeades | 1:ee7cc8d75283 | 251 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 252 | printf("BatteryGaugeBq35100 (I2C 0x%02x): unable to read write to MACDataLen.\n", gAddress >> 1); |
RobMeades | 1:ee7cc8d75283 | 253 | #endif |
RobMeades | 1:ee7cc8d75283 | 254 | } |
RobMeades | 1:ee7cc8d75283 | 255 | } else { |
RobMeades | 1:ee7cc8d75283 | 256 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 257 | printf("BatteryGaugeBq35100 (I2C 0x%02x): unable to write to MACDataSum.\n", gAddress >> 1); |
RobMeades | 1:ee7cc8d75283 | 258 | #endif |
RobMeades | 1:ee7cc8d75283 | 259 | } |
RobMeades | 1:ee7cc8d75283 | 260 | } else { |
RobMeades | 1:ee7cc8d75283 | 261 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 262 | printf("BatteryGaugeBq35100 (I2C 0x%02x): unable to write %d bytes to ManufacturerAccessControl.\r", gAddress >> 1, (int) length + 2); |
RobMeades | 1:ee7cc8d75283 | 263 | #endif |
RobMeades | 1:ee7cc8d75283 | 264 | } |
RobMeades | 1:ee7cc8d75283 | 265 | } else { |
RobMeades | 1:ee7cc8d75283 | 266 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 267 | printf("BatteryGaugeBq35100 (I2C 0x%02x): unable to set Block Data Control.\n", gAddress >> 1); |
RobMeades | 1:ee7cc8d75283 | 268 | #endif |
RobMeades | 1:ee7cc8d75283 | 269 | } |
RobMeades | 1:ee7cc8d75283 | 270 | } else { |
RobMeades | 1:ee7cc8d75283 | 271 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 272 | printf("BatteryGaugeBq35100 (I2C 0x%02x): unable to set the security mode of the chip.\n", gAddress >> 1); |
RobMeades | 1:ee7cc8d75283 | 273 | #endif |
RobMeades | 1:ee7cc8d75283 | 274 | } |
RobMeades | 1:ee7cc8d75283 | 275 | } |
RobMeades | 1:ee7cc8d75283 | 276 | |
RobMeades | 1:ee7cc8d75283 | 277 | // Put the security mode back to what it was |
RobMeades | 1:ee7cc8d75283 | 278 | if (!setSecurityMode(securityMode)) { |
RobMeades | 1:ee7cc8d75283 | 279 | success = false; |
RobMeades | 1:ee7cc8d75283 | 280 | } |
RobMeades | 1:ee7cc8d75283 | 281 | |
RobMeades | 1:ee7cc8d75283 | 282 | return success; |
RobMeades | 1:ee7cc8d75283 | 283 | } |
RobMeades | 1:ee7cc8d75283 | 284 | |
RobMeades | 1:ee7cc8d75283 | 285 | // Get the security mode of the chip. |
RobMeades | 1:ee7cc8d75283 | 286 | // Note: gpI2c should be locked before this is called. |
RobMeades | 1:ee7cc8d75283 | 287 | BatteryGaugeBq35100::SecurityMode BatteryGaugeBq35100::getSecurityMode(void) |
RobMeades | 1:ee7cc8d75283 | 288 | { |
RobMeades | 1:ee7cc8d75283 | 289 | SecurityMode securityMode = SECURITY_MODE_UNKNOWN; |
RobMeades | 1:ee7cc8d75283 | 290 | char data[1]; |
RobMeades | 1:ee7cc8d75283 | 291 | uint16_t controlStatus; |
RobMeades | 1:ee7cc8d75283 | 292 | |
RobMeades | 2:4c699a813451 | 293 | // Read the control status register |
RobMeades | 2:4c699a813451 | 294 | data[0] = 0; |
RobMeades | 2:4c699a813451 | 295 | if ((gpI2c->write(gAddress, &(data[0]), 1) == 0) && |
RobMeades | 2:4c699a813451 | 296 | getTwoBytes(0, &controlStatus)) { |
RobMeades | 2:4c699a813451 | 297 | // Bits 13 and 14 of the high byte represent the security status, |
RobMeades | 2:4c699a813451 | 298 | // 01 = full access |
RobMeades | 2:4c699a813451 | 299 | // 10 = unsealed access |
RobMeades | 2:4c699a813451 | 300 | // 11 = sealed access |
RobMeades | 2:4c699a813451 | 301 | securityMode = (SecurityMode) ((controlStatus >> 13) & 0x03); |
RobMeades | 1:ee7cc8d75283 | 302 | #ifdef DEBUG_BQ35100 |
RobMeades | 2:4c699a813451 | 303 | printf("BatteryGaugeBq35100 (I2C 0x%02x): security mode is 0x%02x (control status 0x%04x).\r\n", gAddress >> 1, securityMode, controlStatus); |
RobMeades | 1:ee7cc8d75283 | 304 | #endif |
RobMeades | 1:ee7cc8d75283 | 305 | } |
RobMeades | 2:4c699a813451 | 306 | |
RobMeades | 1:ee7cc8d75283 | 307 | return securityMode; |
RobMeades | 1:ee7cc8d75283 | 308 | } |
RobMeades | 1:ee7cc8d75283 | 309 | |
RobMeades | 1:ee7cc8d75283 | 310 | // Set the security mode of the chip. |
RobMeades | 1:ee7cc8d75283 | 311 | // Note: gpI2c should be locked before this is called. |
RobMeades | 1:ee7cc8d75283 | 312 | bool BatteryGaugeBq35100::setSecurityMode(SecurityMode securityMode) |
RobMeades | 1:ee7cc8d75283 | 313 | { |
RobMeades | 1:ee7cc8d75283 | 314 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 315 | char data[3]; |
RobMeades | 1:ee7cc8d75283 | 316 | SecurityMode currentSecurityMode = getSecurityMode(); |
RobMeades | 1:ee7cc8d75283 | 317 | |
RobMeades | 1:ee7cc8d75283 | 318 | if (securityMode != SECURITY_MODE_UNKNOWN) { |
RobMeades | 1:ee7cc8d75283 | 319 | if (securityMode != currentSecurityMode) { |
RobMeades | 1:ee7cc8d75283 | 320 | // For reasons that aren't clear, the BQ35100 sometimes refuses |
RobMeades | 1:ee7cc8d75283 | 321 | // to change security mode if a previous security mode change |
RobMeades | 1:ee7cc8d75283 | 322 | // happend only a few seconds ago, hence the retry here |
RobMeades | 1:ee7cc8d75283 | 323 | for (int32_t x = 0; (x < SET_SECURITY_MODE_RETRY_SECONDS) && !success; x++) { |
RobMeades | 2:4c699a813451 | 324 | data[0] = 0x3e; // Set address to ManufacturerAccessControl |
RobMeades | 1:ee7cc8d75283 | 325 | switch (securityMode) { |
RobMeades | 1:ee7cc8d75283 | 326 | case SECURITY_MODE_SEALED: |
RobMeades | 1:ee7cc8d75283 | 327 | // Just seal the chip |
RobMeades | 1:ee7cc8d75283 | 328 | data[1] = 0x20; // First byte of SEALED sub-command (0x20) |
RobMeades | 1:ee7cc8d75283 | 329 | data[2] = 0x00; // Second byte of SEALED sub-command (0x00) (register address will auto-increment) |
RobMeades | 1:ee7cc8d75283 | 330 | gpI2c->write(gAddress, &(data[0]), 3); |
RobMeades | 1:ee7cc8d75283 | 331 | break; |
RobMeades | 1:ee7cc8d75283 | 332 | case SECURITY_MODE_FULL_ACCESS: |
RobMeades | 1:ee7cc8d75283 | 333 | // Send the full access code with endianness conversion |
RobMeades | 1:ee7cc8d75283 | 334 | // in TWO writes |
RobMeades | 1:ee7cc8d75283 | 335 | data[2] = (char) (gFullAccessCodes >> 24); |
RobMeades | 1:ee7cc8d75283 | 336 | data[1] = (char) (gFullAccessCodes >> 16); |
RobMeades | 1:ee7cc8d75283 | 337 | gpI2c->write(gAddress, &(data[0]), 3); |
RobMeades | 1:ee7cc8d75283 | 338 | data[2] = (char) (gFullAccessCodes >> 8); |
RobMeades | 1:ee7cc8d75283 | 339 | data[1] = (char) gFullAccessCodes; |
RobMeades | 1:ee7cc8d75283 | 340 | gpI2c->write(gAddress, &(data[0]), 3); |
RobMeades | 1:ee7cc8d75283 | 341 | break; |
RobMeades | 1:ee7cc8d75283 | 342 | case SECURITY_MODE_UNSEALED: |
RobMeades | 1:ee7cc8d75283 | 343 | data[2] = (char) (gSealCodes >> 24); |
RobMeades | 1:ee7cc8d75283 | 344 | data[1] = (char) (gSealCodes >> 16); |
RobMeades | 1:ee7cc8d75283 | 345 | gpI2c->write(gAddress, &(data[0]), 3); |
RobMeades | 1:ee7cc8d75283 | 346 | data[2] = (char) (gSealCodes >> 8); |
RobMeades | 1:ee7cc8d75283 | 347 | data[1] = (char) gSealCodes; |
RobMeades | 1:ee7cc8d75283 | 348 | gpI2c->write(gAddress, &(data[0]), 3); |
RobMeades | 1:ee7cc8d75283 | 349 | break; |
RobMeades | 1:ee7cc8d75283 | 350 | case SECURITY_MODE_UNKNOWN: |
RobMeades | 1:ee7cc8d75283 | 351 | default: |
RobMeades | 1:ee7cc8d75283 | 352 | MBED_ASSERT(false); |
RobMeades | 1:ee7cc8d75283 | 353 | break; |
RobMeades | 1:ee7cc8d75283 | 354 | } |
RobMeades | 1:ee7cc8d75283 | 355 | |
RobMeades | 1:ee7cc8d75283 | 356 | currentSecurityMode = getSecurityMode(); |
RobMeades | 1:ee7cc8d75283 | 357 | if (currentSecurityMode == securityMode) { |
RobMeades | 1:ee7cc8d75283 | 358 | success = true; |
RobMeades | 1:ee7cc8d75283 | 359 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 360 | printf("BatteryGaugeBq35100 (I2C 0x%02x): security mode is now 0x%02x.\n", gAddress >> 1, currentSecurityMode); |
RobMeades | 1:ee7cc8d75283 | 361 | #endif |
RobMeades | 1:ee7cc8d75283 | 362 | } else { |
RobMeades | 1:ee7cc8d75283 | 363 | wait_ms(1000); |
RobMeades | 1:ee7cc8d75283 | 364 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 365 | printf("BatteryGaugeBq35100 (I2C 0x%02x): security mode set failed (wanted 0x%02x, got 0x%02x), will retry.\n", gAddress >> 1, securityMode, currentSecurityMode); |
RobMeades | 1:ee7cc8d75283 | 366 | #endif |
RobMeades | 1:ee7cc8d75283 | 367 | } |
RobMeades | 1:ee7cc8d75283 | 368 | } |
RobMeades | 1:ee7cc8d75283 | 369 | } else { |
RobMeades | 1:ee7cc8d75283 | 370 | success = true; |
RobMeades | 1:ee7cc8d75283 | 371 | } |
RobMeades | 1:ee7cc8d75283 | 372 | } |
RobMeades | 1:ee7cc8d75283 | 373 | |
RobMeades | 1:ee7cc8d75283 | 374 | return success; |
RobMeades | 1:ee7cc8d75283 | 375 | } |
RobMeades | 1:ee7cc8d75283 | 376 | |
RobMeades | 1:ee7cc8d75283 | 377 | // Make sure that the device is awake and has taken a reading. |
RobMeades | 1:ee7cc8d75283 | 378 | bool BatteryGaugeBq35100::makeAdcReading(void) |
RobMeades | 1:ee7cc8d75283 | 379 | { |
RobMeades | 1:ee7cc8d75283 | 380 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 381 | |
RobMeades | 2:4c699a813451 | 382 | if (isGaugeEnabled()) { |
RobMeades | 2:4c699a813451 | 383 | success = true; |
RobMeades | 2:4c699a813451 | 384 | } else { |
RobMeades | 2:4c699a813451 | 385 | if (enableGauge() && disableGauge()) { |
RobMeades | 2:4c699a813451 | 386 | success = true; |
RobMeades | 1:ee7cc8d75283 | 387 | } |
RobMeades | 1:ee7cc8d75283 | 388 | } |
RobMeades | 1:ee7cc8d75283 | 389 | |
RobMeades | 1:ee7cc8d75283 | 390 | return success; |
RobMeades | 1:ee7cc8d75283 | 391 | } |
RobMeades | 1:ee7cc8d75283 | 392 | |
RobMeades | 0:cec745c014b7 | 393 | //---------------------------------------------------------------- |
RobMeades | 0:cec745c014b7 | 394 | // PUBLIC FUNCTIONS |
RobMeades | 0:cec745c014b7 | 395 | // ---------------------------------------------------------------- |
RobMeades | 0:cec745c014b7 | 396 | |
RobMeades | 0:cec745c014b7 | 397 | // Constructor. |
RobMeades | 0:cec745c014b7 | 398 | BatteryGaugeBq35100::BatteryGaugeBq35100(void) |
RobMeades | 0:cec745c014b7 | 399 | { |
RobMeades | 0:cec745c014b7 | 400 | gpI2c = NULL; |
RobMeades | 1:ee7cc8d75283 | 401 | pGaugeEnable = NULL; |
RobMeades | 0:cec745c014b7 | 402 | gReady = false; |
RobMeades | 1:ee7cc8d75283 | 403 | gSealCodes = 0; |
RobMeades | 1:ee7cc8d75283 | 404 | gFullAccessCodes = 0; |
RobMeades | 0:cec745c014b7 | 405 | } |
RobMeades | 0:cec745c014b7 | 406 | |
RobMeades | 0:cec745c014b7 | 407 | // Destructor. |
RobMeades | 0:cec745c014b7 | 408 | BatteryGaugeBq35100::~BatteryGaugeBq35100(void) |
RobMeades | 0:cec745c014b7 | 409 | { |
RobMeades | 0:cec745c014b7 | 410 | } |
RobMeades | 0:cec745c014b7 | 411 | |
RobMeades | 0:cec745c014b7 | 412 | // Initialise ourselves. |
RobMeades | 1:ee7cc8d75283 | 413 | bool BatteryGaugeBq35100::init(I2C * pI2c, PinName gaugeEnable, uint8_t address, uint32_t sealCodes) |
RobMeades | 0:cec745c014b7 | 414 | { |
RobMeades | 0:cec745c014b7 | 415 | uint16_t answer; |
RobMeades | 0:cec745c014b7 | 416 | char data[4]; |
RobMeades | 0:cec745c014b7 | 417 | |
RobMeades | 0:cec745c014b7 | 418 | gpI2c = pI2c; |
RobMeades | 0:cec745c014b7 | 419 | gAddress = address << 1; |
RobMeades | 1:ee7cc8d75283 | 420 | gSealCodes = sealCodes; |
RobMeades | 1:ee7cc8d75283 | 421 | |
RobMeades | 2:4c699a813451 | 422 | if (gaugeEnable != NC) { |
RobMeades | 2:4c699a813451 | 423 | pGaugeEnable = new DigitalOut(gaugeEnable, 1); |
RobMeades | 2:4c699a813451 | 424 | wait_ms(GAUGE_ENABLE_SETTLING_TIME_MS); |
RobMeades | 2:4c699a813451 | 425 | } |
RobMeades | 0:cec745c014b7 | 426 | |
RobMeades | 0:cec745c014b7 | 427 | if (gpI2c != NULL) { |
RobMeades | 0:cec745c014b7 | 428 | gpI2c->lock(); |
RobMeades | 1:ee7cc8d75283 | 429 | gpI2c->frequency(I2C_CLOCK_FREQUENCY); |
RobMeades | 0:cec745c014b7 | 430 | |
RobMeades | 1:ee7cc8d75283 | 431 | // Send a control command to read the device type |
RobMeades | 1:ee7cc8d75283 | 432 | data[0] = 0x3e; // Set address to ManufacturerAccessControl |
RobMeades | 1:ee7cc8d75283 | 433 | data[1] = 0x03; // First byte of HW_VERSION sub-command (0x03) |
RobMeades | 1:ee7cc8d75283 | 434 | data[2] = 0x00; // Second byte of HW_VERSION sub-command (0x00) (register address will auto-increment) |
RobMeades | 0:cec745c014b7 | 435 | |
RobMeades | 1:ee7cc8d75283 | 436 | if ((gpI2c->write(gAddress, &(data[0]), 3) == 0) && |
RobMeades | 1:ee7cc8d75283 | 437 | getTwoBytes(0x40, &answer)) { // Read from MACData address |
RobMeades | 1:ee7cc8d75283 | 438 | if (answer == 0x00a8) { |
RobMeades | 1:ee7cc8d75283 | 439 | // Read the full access codes, in case we need them |
RobMeades | 2:4c699a813451 | 440 | if (readExtendedData(0x41d0, &(data[0]), sizeof (data))) { |
RobMeades | 1:ee7cc8d75283 | 441 | // The four bytes are the full access codes |
RobMeades | 1:ee7cc8d75283 | 442 | gFullAccessCodes = ((uint32_t) data[0] << 24) + ((uint32_t) data[1] << 16) + ((uint32_t) data[2] << 8) + data[3]; |
RobMeades | 0:cec745c014b7 | 443 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 444 | printf("BatteryGaugeBq35100 (I2C 0x%02x): full access code is 0x%08x.\n", gAddress >> 1, |
RobMeades | 1:ee7cc8d75283 | 445 | (unsigned int) gFullAccessCodes); |
RobMeades | 0:cec745c014b7 | 446 | #endif |
RobMeades | 1:ee7cc8d75283 | 447 | gReady = true; |
RobMeades | 1:ee7cc8d75283 | 448 | } |
RobMeades | 0:cec745c014b7 | 449 | } |
RobMeades | 1:ee7cc8d75283 | 450 | |
RobMeades | 1:ee7cc8d75283 | 451 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 452 | printf("BatteryGaugeBq35100 (I2C 0x%02x): read 0x%04x as HW_VERSION, expected 0x00a8.\n", gAddress >> 1, answer); |
RobMeades | 1:ee7cc8d75283 | 453 | #endif |
RobMeades | 0:cec745c014b7 | 454 | } |
RobMeades | 1:ee7cc8d75283 | 455 | |
RobMeades | 2:4c699a813451 | 456 | disableGauge(); |
RobMeades | 0:cec745c014b7 | 457 | gpI2c->unlock(); |
RobMeades | 0:cec745c014b7 | 458 | } |
RobMeades | 0:cec745c014b7 | 459 | |
RobMeades | 0:cec745c014b7 | 460 | #ifdef DEBUG_BQ35100 |
RobMeades | 0:cec745c014b7 | 461 | if (gReady) { |
RobMeades | 1:ee7cc8d75283 | 462 | printf("BatteryGaugeBq35100 (I2C 0x%02x): handler initialised.\n", gAddress >> 1); |
RobMeades | 0:cec745c014b7 | 463 | } else { |
RobMeades | 1:ee7cc8d75283 | 464 | printf("BatteryGaugeBq35100 (I2C 0x%02x): init NOT successful.\n", gAddress >> 1); |
RobMeades | 0:cec745c014b7 | 465 | } |
RobMeades | 0:cec745c014b7 | 466 | #endif |
RobMeades | 0:cec745c014b7 | 467 | |
RobMeades | 0:cec745c014b7 | 468 | return gReady; |
RobMeades | 0:cec745c014b7 | 469 | } |
RobMeades | 0:cec745c014b7 | 470 | |
RobMeades | 1:ee7cc8d75283 | 471 | // Switch on the battery capacity monitor. |
RobMeades | 2:4c699a813451 | 472 | bool BatteryGaugeBq35100::enableGauge(bool nonVolatile) |
RobMeades | 1:ee7cc8d75283 | 473 | { |
RobMeades | 2:4c699a813451 | 474 | bool accumulatedCapacityOn = false; |
RobMeades | 1:ee7cc8d75283 | 475 | bool success = false; |
RobMeades | 2:4c699a813451 | 476 | char data[3]; |
RobMeades | 2:4c699a813451 | 477 | char opConfig; |
RobMeades | 2:4c699a813451 | 478 | uint16_t controlStatus; |
RobMeades | 2:4c699a813451 | 479 | |
RobMeades | 1:ee7cc8d75283 | 480 | if (gReady) { |
RobMeades | 2:4c699a813451 | 481 | if (nonVolatile) { |
RobMeades | 2:4c699a813451 | 482 | // Read the OpConfig register which is at address 0x41b1 |
RobMeades | 2:4c699a813451 | 483 | if (readExtendedData(0x41b1, &opConfig, sizeof (opConfig))) { |
RobMeades | 2:4c699a813451 | 484 | #ifdef DEBUG_BQ35100 |
RobMeades | 2:4c699a813451 | 485 | printf("BatteryGaugeBq35100 (I2C 0x%02x): OpConfig is 0x%02x.\n", gAddress >> 1, opConfig); |
RobMeades | 2:4c699a813451 | 486 | #endif |
RobMeades | 2:4c699a813451 | 487 | // AccumulatedCapacity is achieved by setting GMSEL 1:0 (in bits 0 and 1) to 00 |
RobMeades | 2:4c699a813451 | 488 | if ((opConfig & 0x03) != 0) { |
RobMeades | 2:4c699a813451 | 489 | opConfig &= ~0x03; |
RobMeades | 2:4c699a813451 | 490 | // Write the new value back |
RobMeades | 2:4c699a813451 | 491 | accumulatedCapacityOn = writeExtendedData(0x41b1, &opConfig, sizeof (opConfig)); |
RobMeades | 2:4c699a813451 | 492 | #ifdef DEBUG_BQ35100 |
RobMeades | 2:4c699a813451 | 493 | if (accumulatedCapacityOn) { |
RobMeades | 2:4c699a813451 | 494 | printf("BatteryGaugeBq35100 (I2C 0x%02x): AccumulatedCapacity enabled, OpConfig becomes 0x%02x.\r\n", gAddress >> 1, opConfig); |
RobMeades | 2:4c699a813451 | 495 | } |
RobMeades | 2:4c699a813451 | 496 | #endif |
RobMeades | 2:4c699a813451 | 497 | } else { |
RobMeades | 2:4c699a813451 | 498 | accumulatedCapacityOn = true; |
RobMeades | 2:4c699a813451 | 499 | } |
RobMeades | 2:4c699a813451 | 500 | } |
RobMeades | 2:4c699a813451 | 501 | } |
RobMeades | 2:4c699a813451 | 502 | |
RobMeades | 2:4c699a813451 | 503 | if (accumulatedCapacityOn || !nonVolatile) { |
RobMeades | 2:4c699a813451 | 504 | if (pGaugeEnable) { |
RobMeades | 2:4c699a813451 | 505 | *pGaugeEnable = 1; |
RobMeades | 2:4c699a813451 | 506 | wait_ms(GAUGE_ENABLE_SETTLING_TIME_MS); |
RobMeades | 2:4c699a813451 | 507 | } |
RobMeades | 2:4c699a813451 | 508 | gpI2c->lock(); |
RobMeades | 2:4c699a813451 | 509 | data[0] = 0x3e; // Set address to ManufacturerAccessControl |
RobMeades | 2:4c699a813451 | 510 | data[1] = 0x11; // First byte of GAUGE_START sub-command (0x11) |
RobMeades | 2:4c699a813451 | 511 | data[2] = 0x00; // Second byte of GAUGE_START sub-command (0x00) (register address will auto-increment) |
RobMeades | 2:4c699a813451 | 512 | if (gpI2c->write(gAddress, &(data[0]), 3) == 0) { |
RobMeades | 2:4c699a813451 | 513 | // Wait for GA bit of CONTROL_STATUS (bit 0) to become 1 |
RobMeades | 2:4c699a813451 | 514 | data[0] = 0; |
RobMeades | 2:4c699a813451 | 515 | if (gpI2c->write(gAddress, &(data[0]), 1) == 0) { |
RobMeades | 2:4c699a813451 | 516 | for (int x = 0; (x < GAUGE_COMPLETE_WAIT_MS / 10) && !success; x++) { |
RobMeades | 2:4c699a813451 | 517 | if (getTwoBytes(0, &controlStatus)) { |
RobMeades | 2:4c699a813451 | 518 | if ((controlStatus & 0x01) == 0x01) { |
RobMeades | 2:4c699a813451 | 519 | success = true; |
RobMeades | 2:4c699a813451 | 520 | } else { |
RobMeades | 2:4c699a813451 | 521 | wait_ms(10); |
RobMeades | 2:4c699a813451 | 522 | } |
RobMeades | 2:4c699a813451 | 523 | } else { |
RobMeades | 2:4c699a813451 | 524 | wait_ms(10); |
RobMeades | 2:4c699a813451 | 525 | } |
RobMeades | 2:4c699a813451 | 526 | } |
RobMeades | 2:4c699a813451 | 527 | } |
RobMeades | 2:4c699a813451 | 528 | } |
RobMeades | 2:4c699a813451 | 529 | gpI2c->unlock(); |
RobMeades | 2:4c699a813451 | 530 | } |
RobMeades | 1:ee7cc8d75283 | 531 | } |
RobMeades | 1:ee7cc8d75283 | 532 | |
RobMeades | 1:ee7cc8d75283 | 533 | return success; |
RobMeades | 1:ee7cc8d75283 | 534 | } |
RobMeades | 1:ee7cc8d75283 | 535 | |
RobMeades | 1:ee7cc8d75283 | 536 | // Switch off the battery capacity monitor. |
RobMeades | 1:ee7cc8d75283 | 537 | bool BatteryGaugeBq35100::disableGauge(void) |
RobMeades | 1:ee7cc8d75283 | 538 | { |
RobMeades | 2:4c699a813451 | 539 | bool accumulatedCapacityOn = false; |
RobMeades | 1:ee7cc8d75283 | 540 | bool success = false; |
RobMeades | 2:4c699a813451 | 541 | char data[3]; |
RobMeades | 2:4c699a813451 | 542 | char opConfig; |
RobMeades | 2:4c699a813451 | 543 | uint16_t controlStatus; |
RobMeades | 1:ee7cc8d75283 | 544 | |
RobMeades | 1:ee7cc8d75283 | 545 | if (gReady) { |
RobMeades | 2:4c699a813451 | 546 | if (isGaugeEnabled()) { |
RobMeades | 2:4c699a813451 | 547 | // Read the OpConfig register which is at address 0x41b1 |
RobMeades | 2:4c699a813451 | 548 | if (readExtendedData(0x41b1, &opConfig, sizeof (opConfig))) { |
RobMeades | 2:4c699a813451 | 549 | #ifdef DEBUG_BQ35100 |
RobMeades | 2:4c699a813451 | 550 | printf("BatteryGaugeBq35100 (I2C 0x%02x): OpConfig is 0x%02x.\n", gAddress >> 1, opConfig); |
RobMeades | 2:4c699a813451 | 551 | #endif |
RobMeades | 2:4c699a813451 | 552 | // Check if AccumulatedCapacity is on |
RobMeades | 2:4c699a813451 | 553 | if ((opConfig & 0x03) == 0) { |
RobMeades | 2:4c699a813451 | 554 | accumulatedCapacityOn = true; |
RobMeades | 2:4c699a813451 | 555 | } |
RobMeades | 2:4c699a813451 | 556 | |
RobMeades | 2:4c699a813451 | 557 | // Send GAUGE_STOP |
RobMeades | 2:4c699a813451 | 558 | gpI2c->lock(); |
RobMeades | 2:4c699a813451 | 559 | data[0] = 0x3e; // Set address to ManufacturerAccessControl |
RobMeades | 2:4c699a813451 | 560 | data[1] = 0x12; // First byte of GAUGE_STOP sub-command (0x12) |
RobMeades | 2:4c699a813451 | 561 | data[2] = 0x00; // Second byte of GAUGE_STOP sub-command (0x00) (register address will auto-increment) |
RobMeades | 2:4c699a813451 | 562 | if (gpI2c->write(gAddress, &(data[0]), 3) == 0) { |
RobMeades | 2:4c699a813451 | 563 | // Wait for GA bit of CONTROL_STATUS (bit 0) to become 0 and, |
RobMeades | 2:4c699a813451 | 564 | // if AccumulatedCapacity was on, wait for G_DONE |
RobMeades | 2:4c699a813451 | 565 | // (bit 6 in CONTROL_STATUS) to be set |
RobMeades | 2:4c699a813451 | 566 | data[0] = 0; |
RobMeades | 2:4c699a813451 | 567 | if (gpI2c->write(gAddress, &(data[0]), 1) == 0) { |
RobMeades | 2:4c699a813451 | 568 | for (int x = 0; (x < GAUGE_COMPLETE_WAIT_MS / 10) && !success; x++) { |
RobMeades | 2:4c699a813451 | 569 | if (getTwoBytes(0, &controlStatus)) { |
RobMeades | 2:4c699a813451 | 570 | if ((controlStatus & 0x01) == 0) { |
RobMeades | 2:4c699a813451 | 571 | if (accumulatedCapacityOn) { |
RobMeades | 2:4c699a813451 | 572 | if (((controlStatus >> 6) & 0x01) == 0x01) { |
RobMeades | 2:4c699a813451 | 573 | success = true; |
RobMeades | 2:4c699a813451 | 574 | #ifdef DEBUG_BQ35100 |
RobMeades | 2:4c699a813451 | 575 | printf("BatteryGaugeBq35100 (I2C 0x%02x): AccumulatedCapacity data written to non-volatile memory.\r\n", gAddress >> 1); |
RobMeades | 2:4c699a813451 | 576 | #endif |
RobMeades | 2:4c699a813451 | 577 | } else { |
RobMeades | 2:4c699a813451 | 578 | wait_ms(10); |
RobMeades | 2:4c699a813451 | 579 | } |
RobMeades | 2:4c699a813451 | 580 | } else { |
RobMeades | 2:4c699a813451 | 581 | success = true; |
RobMeades | 2:4c699a813451 | 582 | } |
RobMeades | 2:4c699a813451 | 583 | } else { |
RobMeades | 2:4c699a813451 | 584 | wait_ms(10); |
RobMeades | 2:4c699a813451 | 585 | } |
RobMeades | 2:4c699a813451 | 586 | } else { |
RobMeades | 2:4c699a813451 | 587 | wait_ms(10); |
RobMeades | 2:4c699a813451 | 588 | } |
RobMeades | 2:4c699a813451 | 589 | } |
RobMeades | 2:4c699a813451 | 590 | } |
RobMeades | 2:4c699a813451 | 591 | } |
RobMeades | 2:4c699a813451 | 592 | gpI2c->unlock(); |
RobMeades | 2:4c699a813451 | 593 | } |
RobMeades | 2:4c699a813451 | 594 | } else { |
RobMeades | 2:4c699a813451 | 595 | success = true; |
RobMeades | 2:4c699a813451 | 596 | } |
RobMeades | 2:4c699a813451 | 597 | |
RobMeades | 2:4c699a813451 | 598 | if (pGaugeEnable) { |
RobMeades | 2:4c699a813451 | 599 | *pGaugeEnable = 0; |
RobMeades | 2:4c699a813451 | 600 | } |
RobMeades | 1:ee7cc8d75283 | 601 | } |
RobMeades | 1:ee7cc8d75283 | 602 | |
RobMeades | 1:ee7cc8d75283 | 603 | return success; |
RobMeades | 1:ee7cc8d75283 | 604 | } |
RobMeades | 1:ee7cc8d75283 | 605 | |
RobMeades | 1:ee7cc8d75283 | 606 | // Determine whether battery gauging is enabled. |
RobMeades | 1:ee7cc8d75283 | 607 | bool BatteryGaugeBq35100::isGaugeEnabled(void) |
RobMeades | 1:ee7cc8d75283 | 608 | { |
RobMeades | 2:4c699a813451 | 609 | bool gaugeEnabled = false; |
RobMeades | 2:4c699a813451 | 610 | char data[1]; |
RobMeades | 2:4c699a813451 | 611 | uint16_t controlStatus; |
RobMeades | 2:4c699a813451 | 612 | |
RobMeades | 1:ee7cc8d75283 | 613 | if (gReady) { |
RobMeades | 2:4c699a813451 | 614 | // Check the GA bit (bit 0) in CONTROL_STATUS |
RobMeades | 2:4c699a813451 | 615 | data[0] = 0; |
RobMeades | 2:4c699a813451 | 616 | if ((gpI2c->write(gAddress, &(data[0]), 1) == 0) && |
RobMeades | 2:4c699a813451 | 617 | getTwoBytes(0, &controlStatus)) { |
RobMeades | 2:4c699a813451 | 618 | #ifdef DEBUG_BQ35100 |
RobMeades | 2:4c699a813451 | 619 | printf("BatteryGaugeBq35100 (I2C 0x%02x): read 0x%04x as CONTROL_STATUS.\n", gAddress >> 1, controlStatus); |
RobMeades | 2:4c699a813451 | 620 | #endif |
RobMeades | 2:4c699a813451 | 621 | if ((controlStatus & 0x01) == 0x01) { |
RobMeades | 2:4c699a813451 | 622 | gaugeEnabled = true; |
RobMeades | 2:4c699a813451 | 623 | } |
RobMeades | 2:4c699a813451 | 624 | } |
RobMeades | 1:ee7cc8d75283 | 625 | } |
RobMeades | 1:ee7cc8d75283 | 626 | |
RobMeades | 2:4c699a813451 | 627 | return gaugeEnabled; |
RobMeades | 1:ee7cc8d75283 | 628 | } |
RobMeades | 1:ee7cc8d75283 | 629 | |
RobMeades | 1:ee7cc8d75283 | 630 | // Set the designed capacity of the cell. |
RobMeades | 1:ee7cc8d75283 | 631 | bool BatteryGaugeBq35100::setDesignCapacity(uint32_t capacityMAh) |
RobMeades | 1:ee7cc8d75283 | 632 | { |
RobMeades | 1:ee7cc8d75283 | 633 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 634 | char data[2]; |
RobMeades | 1:ee7cc8d75283 | 635 | |
RobMeades | 1:ee7cc8d75283 | 636 | if (gReady) { |
RobMeades | 1:ee7cc8d75283 | 637 | gpI2c->lock(); |
RobMeades | 1:ee7cc8d75283 | 638 | |
RobMeades | 1:ee7cc8d75283 | 639 | data[0] = capacityMAh >> 8; // Upper byte of design capacity |
RobMeades | 1:ee7cc8d75283 | 640 | data[1] = capacityMAh; // Lower byte of design capacity |
RobMeades | 1:ee7cc8d75283 | 641 | |
RobMeades | 1:ee7cc8d75283 | 642 | // Write to the "Cell Design Capacity mAh" address in data flash |
RobMeades | 2:4c699a813451 | 643 | if (writeExtendedData(0x41fe, &(data[0]), sizeof(data))) { |
RobMeades | 1:ee7cc8d75283 | 644 | success = true; |
RobMeades | 1:ee7cc8d75283 | 645 | |
RobMeades | 1:ee7cc8d75283 | 646 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 647 | printf("BatteryGaugeBq35100 (I2C 0x%02x): designed cell capacity set to %d mAh.\n", gAddress >> 1, |
RobMeades | 1:ee7cc8d75283 | 648 | (unsigned int) capacityMAh); |
RobMeades | 1:ee7cc8d75283 | 649 | #endif |
RobMeades | 1:ee7cc8d75283 | 650 | } |
RobMeades | 1:ee7cc8d75283 | 651 | |
RobMeades | 1:ee7cc8d75283 | 652 | gpI2c->unlock(); |
RobMeades | 1:ee7cc8d75283 | 653 | } |
RobMeades | 1:ee7cc8d75283 | 654 | |
RobMeades | 1:ee7cc8d75283 | 655 | return success; |
RobMeades | 1:ee7cc8d75283 | 656 | } |
RobMeades | 1:ee7cc8d75283 | 657 | |
RobMeades | 1:ee7cc8d75283 | 658 | // Get the designed capacity of the cell. |
RobMeades | 1:ee7cc8d75283 | 659 | bool BatteryGaugeBq35100::getDesignCapacity(uint32_t *pCapacityMAh) |
RobMeades | 1:ee7cc8d75283 | 660 | { |
RobMeades | 1:ee7cc8d75283 | 661 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 662 | uint16_t data; |
RobMeades | 1:ee7cc8d75283 | 663 | |
RobMeades | 1:ee7cc8d75283 | 664 | if (gReady) { |
RobMeades | 1:ee7cc8d75283 | 665 | gpI2c->lock(); |
RobMeades | 1:ee7cc8d75283 | 666 | |
RobMeades | 1:ee7cc8d75283 | 667 | // Read from the DesignCapacity address |
RobMeades | 1:ee7cc8d75283 | 668 | if (getTwoBytes (0x3c, &data)) { |
RobMeades | 1:ee7cc8d75283 | 669 | success = true; |
RobMeades | 1:ee7cc8d75283 | 670 | |
RobMeades | 1:ee7cc8d75283 | 671 | // The answer is in mAh |
RobMeades | 1:ee7cc8d75283 | 672 | if (pCapacityMAh) { |
RobMeades | 1:ee7cc8d75283 | 673 | *pCapacityMAh = data; |
RobMeades | 1:ee7cc8d75283 | 674 | } |
RobMeades | 1:ee7cc8d75283 | 675 | |
RobMeades | 1:ee7cc8d75283 | 676 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 677 | printf("BatteryGaugeBq35100 (I2C 0x%02x): designed cell capacity is %d mAh.\n", gAddress >> 1, data); |
RobMeades | 1:ee7cc8d75283 | 678 | #endif |
RobMeades | 1:ee7cc8d75283 | 679 | } |
RobMeades | 1:ee7cc8d75283 | 680 | |
RobMeades | 1:ee7cc8d75283 | 681 | } |
RobMeades | 1:ee7cc8d75283 | 682 | |
RobMeades | 1:ee7cc8d75283 | 683 | return success; |
RobMeades | 1:ee7cc8d75283 | 684 | } |
RobMeades | 1:ee7cc8d75283 | 685 | |
RobMeades | 1:ee7cc8d75283 | 686 | // Get the temperature of the chip. |
RobMeades | 1:ee7cc8d75283 | 687 | bool BatteryGaugeBq35100::getTemperature(int32_t *pTemperatureC) |
RobMeades | 1:ee7cc8d75283 | 688 | { |
RobMeades | 1:ee7cc8d75283 | 689 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 690 | int32_t temperatureC = 0; |
RobMeades | 1:ee7cc8d75283 | 691 | uint16_t data; |
RobMeades | 1:ee7cc8d75283 | 692 | |
RobMeades | 2:4c699a813451 | 693 | if (gReady && makeAdcReading()) { |
RobMeades | 1:ee7cc8d75283 | 694 | gpI2c->lock(); |
RobMeades | 1:ee7cc8d75283 | 695 | // Read from the temperature register address |
RobMeades | 1:ee7cc8d75283 | 696 | if (getTwoBytes (0x06, &data)) { |
RobMeades | 1:ee7cc8d75283 | 697 | success = true; |
RobMeades | 1:ee7cc8d75283 | 698 | |
RobMeades | 1:ee7cc8d75283 | 699 | // The answer is in units of 0.1 K, so convert to C |
RobMeades | 1:ee7cc8d75283 | 700 | temperatureC = ((int32_t) data / 10) - 273; |
RobMeades | 1:ee7cc8d75283 | 701 | |
RobMeades | 1:ee7cc8d75283 | 702 | if (pTemperatureC) { |
RobMeades | 1:ee7cc8d75283 | 703 | *pTemperatureC = temperatureC; |
RobMeades | 1:ee7cc8d75283 | 704 | } |
RobMeades | 1:ee7cc8d75283 | 705 | |
RobMeades | 1:ee7cc8d75283 | 706 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 707 | printf("BatteryGaugeBq35100 (I2C 0x%02x): chip temperature %.1f K, so %d C.\n", gAddress >> 1, ((float) data) / 10, (int) temperatureC); |
RobMeades | 1:ee7cc8d75283 | 708 | #endif |
RobMeades | 1:ee7cc8d75283 | 709 | } |
RobMeades | 1:ee7cc8d75283 | 710 | |
RobMeades | 1:ee7cc8d75283 | 711 | gpI2c->unlock(); |
RobMeades | 1:ee7cc8d75283 | 712 | } |
RobMeades | 1:ee7cc8d75283 | 713 | |
RobMeades | 1:ee7cc8d75283 | 714 | return success; |
RobMeades | 1:ee7cc8d75283 | 715 | } |
RobMeades | 1:ee7cc8d75283 | 716 | |
RobMeades | 1:ee7cc8d75283 | 717 | // Get the voltage of the battery. |
RobMeades | 1:ee7cc8d75283 | 718 | bool BatteryGaugeBq35100::getVoltage(int32_t *pVoltageMV) |
RobMeades | 1:ee7cc8d75283 | 719 | { |
RobMeades | 1:ee7cc8d75283 | 720 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 721 | uint16_t data = 0; |
RobMeades | 1:ee7cc8d75283 | 722 | |
RobMeades | 2:4c699a813451 | 723 | if (gReady && makeAdcReading()) { |
RobMeades | 1:ee7cc8d75283 | 724 | gpI2c->lock(); |
RobMeades | 1:ee7cc8d75283 | 725 | // Read from the voltage register address |
RobMeades | 1:ee7cc8d75283 | 726 | if (getTwoBytes (0x08, &data)) { |
RobMeades | 1:ee7cc8d75283 | 727 | success = true; |
RobMeades | 1:ee7cc8d75283 | 728 | |
RobMeades | 1:ee7cc8d75283 | 729 | // The answer is in mV |
RobMeades | 1:ee7cc8d75283 | 730 | if (pVoltageMV) { |
RobMeades | 1:ee7cc8d75283 | 731 | *pVoltageMV = (int32_t) data; |
RobMeades | 1:ee7cc8d75283 | 732 | } |
RobMeades | 1:ee7cc8d75283 | 733 | |
RobMeades | 1:ee7cc8d75283 | 734 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 735 | printf("BatteryGaugeBq35100 (I2C 0x%02x): battery voltage %.3f V.\n", gAddress >> 1, ((float) data) / 1000); |
RobMeades | 1:ee7cc8d75283 | 736 | #endif |
RobMeades | 1:ee7cc8d75283 | 737 | } |
RobMeades | 1:ee7cc8d75283 | 738 | |
RobMeades | 1:ee7cc8d75283 | 739 | gpI2c->unlock(); |
RobMeades | 1:ee7cc8d75283 | 740 | } |
RobMeades | 1:ee7cc8d75283 | 741 | |
RobMeades | 1:ee7cc8d75283 | 742 | return success; |
RobMeades | 1:ee7cc8d75283 | 743 | } |
RobMeades | 1:ee7cc8d75283 | 744 | |
RobMeades | 1:ee7cc8d75283 | 745 | // Get the current flowing from the battery. |
RobMeades | 1:ee7cc8d75283 | 746 | bool BatteryGaugeBq35100::getCurrent(int32_t *pCurrentMA) |
RobMeades | 1:ee7cc8d75283 | 747 | { |
RobMeades | 1:ee7cc8d75283 | 748 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 749 | int32_t currentMA = 0; |
RobMeades | 2:4c699a813451 | 750 | uint16_t data = 0; |
RobMeades | 1:ee7cc8d75283 | 751 | |
RobMeades | 2:4c699a813451 | 752 | if (gReady && makeAdcReading()) { |
RobMeades | 1:ee7cc8d75283 | 753 | gpI2c->lock(); |
RobMeades | 1:ee7cc8d75283 | 754 | // Read from the average current register address |
RobMeades | 1:ee7cc8d75283 | 755 | if (getTwoBytes (0x0c, &data)) { |
RobMeades | 1:ee7cc8d75283 | 756 | success = true; |
RobMeades | 1:ee7cc8d75283 | 757 | |
RobMeades | 1:ee7cc8d75283 | 758 | if (pCurrentMA) { |
RobMeades | 1:ee7cc8d75283 | 759 | *pCurrentMA = currentMA; |
RobMeades | 1:ee7cc8d75283 | 760 | } |
RobMeades | 1:ee7cc8d75283 | 761 | |
RobMeades | 1:ee7cc8d75283 | 762 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 763 | printf("BatteryGaugeBq35100 (I2C 0x%02x): current %d mA.\n", gAddress >> 1, (int) currentMA); |
RobMeades | 1:ee7cc8d75283 | 764 | #endif |
RobMeades | 1:ee7cc8d75283 | 765 | } |
RobMeades | 1:ee7cc8d75283 | 766 | |
RobMeades | 1:ee7cc8d75283 | 767 | gpI2c->unlock(); |
RobMeades | 1:ee7cc8d75283 | 768 | } |
RobMeades | 1:ee7cc8d75283 | 769 | |
RobMeades | 1:ee7cc8d75283 | 770 | return success; |
RobMeades | 1:ee7cc8d75283 | 771 | } |
RobMeades | 1:ee7cc8d75283 | 772 | |
RobMeades | 1:ee7cc8d75283 | 773 | // Get the battery capacity used. |
RobMeades | 1:ee7cc8d75283 | 774 | bool BatteryGaugeBq35100::getUsedCapacity(uint32_t *pCapacityUAh) |
RobMeades | 1:ee7cc8d75283 | 775 | { |
RobMeades | 1:ee7cc8d75283 | 776 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 777 | char bytes[5]; |
RobMeades | 1:ee7cc8d75283 | 778 | uint32_t data; |
RobMeades | 1:ee7cc8d75283 | 779 | |
RobMeades | 2:4c699a813451 | 780 | if (gReady && makeAdcReading()) { |
RobMeades | 1:ee7cc8d75283 | 781 | gpI2c->lock(); |
RobMeades | 1:ee7cc8d75283 | 782 | // Read four bytes from the AccummulatedCapacity register address |
RobMeades | 1:ee7cc8d75283 | 783 | |
RobMeades | 1:ee7cc8d75283 | 784 | // Send a command to read from registerAddress |
RobMeades | 1:ee7cc8d75283 | 785 | bytes[0] = 0x02; |
RobMeades | 1:ee7cc8d75283 | 786 | bytes[1] = 0; |
RobMeades | 1:ee7cc8d75283 | 787 | bytes[2] = 0; |
RobMeades | 1:ee7cc8d75283 | 788 | bytes[3] = 0; |
RobMeades | 1:ee7cc8d75283 | 789 | bytes[4] = 0; |
RobMeades | 1:ee7cc8d75283 | 790 | |
RobMeades | 1:ee7cc8d75283 | 791 | if ((gpI2c->write(gAddress, &(bytes[0]), 1) == 0) && |
RobMeades | 1:ee7cc8d75283 | 792 | (gpI2c->read(gAddress, &(bytes[1]), 4) == 0)) { |
RobMeades | 1:ee7cc8d75283 | 793 | success = true; |
RobMeades | 1:ee7cc8d75283 | 794 | data = (((uint32_t) bytes[4]) << 24) + (((uint32_t) bytes[3]) << 16) + (((uint32_t) bytes[2]) << 8) + bytes[1]; |
RobMeades | 1:ee7cc8d75283 | 795 | |
RobMeades | 1:ee7cc8d75283 | 796 | // The answer is in uAh |
RobMeades | 1:ee7cc8d75283 | 797 | if (pCapacityUAh) { |
RobMeades | 1:ee7cc8d75283 | 798 | *pCapacityUAh = data; |
RobMeades | 1:ee7cc8d75283 | 799 | } |
RobMeades | 1:ee7cc8d75283 | 800 | |
RobMeades | 1:ee7cc8d75283 | 801 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 802 | printf("BatteryGaugeBq35100 (I2C 0x%02x): battery capacity used %u uAh.\n", gAddress >> 1, (unsigned int) data); |
RobMeades | 1:ee7cc8d75283 | 803 | #endif |
RobMeades | 1:ee7cc8d75283 | 804 | } |
RobMeades | 1:ee7cc8d75283 | 805 | |
RobMeades | 1:ee7cc8d75283 | 806 | gpI2c->unlock(); |
RobMeades | 1:ee7cc8d75283 | 807 | } |
RobMeades | 1:ee7cc8d75283 | 808 | |
RobMeades | 1:ee7cc8d75283 | 809 | return success; |
RobMeades | 1:ee7cc8d75283 | 810 | } |
RobMeades | 1:ee7cc8d75283 | 811 | |
RobMeades | 1:ee7cc8d75283 | 812 | // Get the battery capacity remaining. |
RobMeades | 1:ee7cc8d75283 | 813 | bool BatteryGaugeBq35100::getRemainingCapacity(uint32_t *pCapacityUAh) |
RobMeades | 1:ee7cc8d75283 | 814 | { |
RobMeades | 1:ee7cc8d75283 | 815 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 816 | uint32_t designCapacityUAh; |
RobMeades | 1:ee7cc8d75283 | 817 | uint32_t usedCapacityUAh; |
RobMeades | 1:ee7cc8d75283 | 818 | |
RobMeades | 1:ee7cc8d75283 | 819 | // First, get the designed capacity |
RobMeades | 1:ee7cc8d75283 | 820 | if (getDesignCapacity(&designCapacityUAh)) { |
RobMeades | 1:ee7cc8d75283 | 821 | designCapacityUAh *= 1000; |
RobMeades | 1:ee7cc8d75283 | 822 | // Then get the used capacity |
RobMeades | 1:ee7cc8d75283 | 823 | if (getUsedCapacity(&usedCapacityUAh)) { |
RobMeades | 1:ee7cc8d75283 | 824 | success = true; |
RobMeades | 1:ee7cc8d75283 | 825 | // Limit the result |
RobMeades | 1:ee7cc8d75283 | 826 | if (usedCapacityUAh > designCapacityUAh) { |
RobMeades | 1:ee7cc8d75283 | 827 | usedCapacityUAh = designCapacityUAh; |
RobMeades | 1:ee7cc8d75283 | 828 | } |
RobMeades | 1:ee7cc8d75283 | 829 | |
RobMeades | 1:ee7cc8d75283 | 830 | // The answer is in uAh |
RobMeades | 1:ee7cc8d75283 | 831 | if (pCapacityUAh) { |
RobMeades | 1:ee7cc8d75283 | 832 | *pCapacityUAh = designCapacityUAh - usedCapacityUAh; |
RobMeades | 1:ee7cc8d75283 | 833 | } |
RobMeades | 1:ee7cc8d75283 | 834 | |
RobMeades | 1:ee7cc8d75283 | 835 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 836 | printf("BatteryGaugeBq35100 (I2C 0x%02x): battery capacity remaining %u uAh (from a designed capacity of %d uAh).\n", gAddress >> 1, |
RobMeades | 1:ee7cc8d75283 | 837 | (unsigned int) (designCapacityUAh - usedCapacityUAh), (unsigned int) designCapacityUAh); |
RobMeades | 1:ee7cc8d75283 | 838 | #endif |
RobMeades | 1:ee7cc8d75283 | 839 | } |
RobMeades | 1:ee7cc8d75283 | 840 | } |
RobMeades | 1:ee7cc8d75283 | 841 | |
RobMeades | 1:ee7cc8d75283 | 842 | return success; |
RobMeades | 1:ee7cc8d75283 | 843 | } |
RobMeades | 1:ee7cc8d75283 | 844 | |
RobMeades | 1:ee7cc8d75283 | 845 | // Get the percentage capacity remaining. |
RobMeades | 1:ee7cc8d75283 | 846 | bool BatteryGaugeBq35100::getRemainingPercentage(int32_t *pBatteryPercentage) |
RobMeades | 1:ee7cc8d75283 | 847 | { |
RobMeades | 1:ee7cc8d75283 | 848 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 849 | uint32_t designCapacityUAh; |
RobMeades | 1:ee7cc8d75283 | 850 | uint32_t usedCapacityUAh; |
RobMeades | 1:ee7cc8d75283 | 851 | int32_t batteryPercentage; |
RobMeades | 1:ee7cc8d75283 | 852 | |
RobMeades | 2:4c699a813451 | 853 | // First, get the designed capacity (which is actually in mAh) |
RobMeades | 1:ee7cc8d75283 | 854 | if (getDesignCapacity(&designCapacityUAh)) { |
RobMeades | 2:4c699a813451 | 855 | // Convert to uAh |
RobMeades | 1:ee7cc8d75283 | 856 | designCapacityUAh *= 1000; |
RobMeades | 1:ee7cc8d75283 | 857 | // Then get the used capacity |
RobMeades | 1:ee7cc8d75283 | 858 | if (getUsedCapacity(&usedCapacityUAh)) { |
RobMeades | 1:ee7cc8d75283 | 859 | success = true; |
RobMeades | 1:ee7cc8d75283 | 860 | // Limit the result |
RobMeades | 1:ee7cc8d75283 | 861 | if (usedCapacityUAh > designCapacityUAh) { |
RobMeades | 1:ee7cc8d75283 | 862 | usedCapacityUAh = designCapacityUAh; |
RobMeades | 1:ee7cc8d75283 | 863 | } |
RobMeades | 1:ee7cc8d75283 | 864 | batteryPercentage = (uint64_t) (designCapacityUAh - usedCapacityUAh) * 100 / designCapacityUAh; |
RobMeades | 1:ee7cc8d75283 | 865 | |
RobMeades | 1:ee7cc8d75283 | 866 | if (pBatteryPercentage) { |
RobMeades | 1:ee7cc8d75283 | 867 | *pBatteryPercentage = batteryPercentage; |
RobMeades | 1:ee7cc8d75283 | 868 | } |
RobMeades | 1:ee7cc8d75283 | 869 | |
RobMeades | 1:ee7cc8d75283 | 870 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 871 | printf("BatteryGaugeBq35100 (I2C 0x%02x): battery capacity remaining %d%%.\n", gAddress >> 1, |
RobMeades | 1:ee7cc8d75283 | 872 | (unsigned int) batteryPercentage); |
RobMeades | 1:ee7cc8d75283 | 873 | #endif |
RobMeades | 1:ee7cc8d75283 | 874 | } |
RobMeades | 1:ee7cc8d75283 | 875 | } |
RobMeades | 1:ee7cc8d75283 | 876 | |
RobMeades | 1:ee7cc8d75283 | 877 | return success; |
RobMeades | 1:ee7cc8d75283 | 878 | } |
RobMeades | 1:ee7cc8d75283 | 879 | |
RobMeades | 2:4c699a813451 | 880 | // Indicate that a new battery has been inserted. |
RobMeades | 2:4c699a813451 | 881 | bool BatteryGaugeBq35100::newBattery(uint32_t capacityMAh) |
RobMeades | 2:4c699a813451 | 882 | { |
RobMeades | 2:4c699a813451 | 883 | bool success = false; |
RobMeades | 2:4c699a813451 | 884 | char data[3]; |
RobMeades | 2:4c699a813451 | 885 | |
RobMeades | 2:4c699a813451 | 886 | if (gReady) { |
RobMeades | 2:4c699a813451 | 887 | if (setDesignCapacity(capacityMAh)) { |
RobMeades | 2:4c699a813451 | 888 | gpI2c->lock(); |
RobMeades | 2:4c699a813451 | 889 | // Send a control command to indicate NEW_BATTERY |
RobMeades | 2:4c699a813451 | 890 | data[0] = 0x3e; // Set address to ManufacturerAccessControl |
RobMeades | 2:4c699a813451 | 891 | data[1] = 0x13; // First byte of NEW_BATTERY sub-command (0x13) |
RobMeades | 2:4c699a813451 | 892 | data[2] = 0xA6; // Second byte of NEW_BATTERY sub-command (0xA6) (register address will auto-increment) |
RobMeades | 2:4c699a813451 | 893 | if (gpI2c->write(gAddress, &(data[0]), 3) == 0) { |
RobMeades | 2:4c699a813451 | 894 | success = true; |
RobMeades | 2:4c699a813451 | 895 | #ifdef DEBUG_BQ35100 |
RobMeades | 2:4c699a813451 | 896 | printf("BatteryGaugeBq35100 (I2C 0x%02x): new battery set.\n", gAddress >> 1); |
RobMeades | 2:4c699a813451 | 897 | #endif |
RobMeades | 2:4c699a813451 | 898 | } |
RobMeades | 2:4c699a813451 | 899 | |
RobMeades | 2:4c699a813451 | 900 | gpI2c->unlock(); |
RobMeades | 2:4c699a813451 | 901 | } |
RobMeades | 2:4c699a813451 | 902 | } |
RobMeades | 2:4c699a813451 | 903 | |
RobMeades | 2:4c699a813451 | 904 | return success; |
RobMeades | 2:4c699a813451 | 905 | } |
RobMeades | 2:4c699a813451 | 906 | |
RobMeades | 2:4c699a813451 | 907 | // Read configuration data. |
RobMeades | 2:4c699a813451 | 908 | bool BatteryGaugeBq35100::advancedGetConfig(int32_t address, char * pData, int32_t length) |
RobMeades | 2:4c699a813451 | 909 | { |
RobMeades | 2:4c699a813451 | 910 | bool success = false; |
RobMeades | 2:4c699a813451 | 911 | |
RobMeades | 2:4c699a813451 | 912 | if (gReady) { |
RobMeades | 2:4c699a813451 | 913 | gpI2c->lock(); |
RobMeades | 2:4c699a813451 | 914 | |
RobMeades | 2:4c699a813451 | 915 | success = readExtendedData(address, pData, length); |
RobMeades | 2:4c699a813451 | 916 | |
RobMeades | 2:4c699a813451 | 917 | gpI2c->unlock(); |
RobMeades | 2:4c699a813451 | 918 | } |
RobMeades | 2:4c699a813451 | 919 | |
RobMeades | 2:4c699a813451 | 920 | return success; |
RobMeades | 2:4c699a813451 | 921 | } |
RobMeades | 2:4c699a813451 | 922 | |
RobMeades | 2:4c699a813451 | 923 | // Write configuration data. |
RobMeades | 2:4c699a813451 | 924 | bool BatteryGaugeBq35100::advancedSetConfig(int32_t address, const char * pData, int32_t length) |
RobMeades | 2:4c699a813451 | 925 | { |
RobMeades | 2:4c699a813451 | 926 | bool success = false; |
RobMeades | 2:4c699a813451 | 927 | |
RobMeades | 2:4c699a813451 | 928 | if (gReady) { |
RobMeades | 2:4c699a813451 | 929 | gpI2c->lock(); |
RobMeades | 2:4c699a813451 | 930 | |
RobMeades | 2:4c699a813451 | 931 | success = writeExtendedData(address, pData, length); |
RobMeades | 2:4c699a813451 | 932 | |
RobMeades | 2:4c699a813451 | 933 | gpI2c->unlock(); |
RobMeades | 2:4c699a813451 | 934 | } |
RobMeades | 2:4c699a813451 | 935 | |
RobMeades | 2:4c699a813451 | 936 | return success; |
RobMeades | 2:4c699a813451 | 937 | } |
RobMeades | 2:4c699a813451 | 938 | |
RobMeades | 2:4c699a813451 | 939 | // Send a control word. |
RobMeades | 2:4c699a813451 | 940 | bool BatteryGaugeBq35100::advancedSendControlWord(uint16_t controlWord, uint16_t *pDataReturned) |
RobMeades | 2:4c699a813451 | 941 | { |
RobMeades | 2:4c699a813451 | 942 | bool success = false; |
RobMeades | 2:4c699a813451 | 943 | char data[3]; |
RobMeades | 2:4c699a813451 | 944 | |
RobMeades | 2:4c699a813451 | 945 | if (gReady) { |
RobMeades | 2:4c699a813451 | 946 | gpI2c->lock(); |
RobMeades | 2:4c699a813451 | 947 | |
RobMeades | 2:4c699a813451 | 948 | // Send the control command |
RobMeades | 2:4c699a813451 | 949 | data[0] = 0x3e; // Set address to ManufacturerAccessControl |
RobMeades | 2:4c699a813451 | 950 | data[1] = (char) controlWord; // First byte of controlWord |
RobMeades | 2:4c699a813451 | 951 | data[2] = (char) (controlWord >> 8); // Second byte of controlWord |
RobMeades | 2:4c699a813451 | 952 | if (gpI2c->write(gAddress, &(data[0]), 3) == 0) { |
RobMeades | 2:4c699a813451 | 953 | // Read the two bytes returned if requested |
RobMeades | 2:4c699a813451 | 954 | if (pDataReturned != NULL) { |
RobMeades | 2:4c699a813451 | 955 | if (getTwoBytes(0x40, pDataReturned)) { // Read from MACData |
RobMeades | 2:4c699a813451 | 956 | success = true; |
RobMeades | 2:4c699a813451 | 957 | #ifdef DEBUG_BQ35100 |
RobMeades | 2:4c699a813451 | 958 | printf("BatteryGaugeBq35100 (I2C 0x%02x): sent control word 0x%04x, read back 0x%04x.\n", gAddress >> 1, controlWord, *pDataReturned); |
RobMeades | 2:4c699a813451 | 959 | #endif |
RobMeades | 2:4c699a813451 | 960 | } |
RobMeades | 2:4c699a813451 | 961 | } else { |
RobMeades | 2:4c699a813451 | 962 | success = true; |
RobMeades | 2:4c699a813451 | 963 | #ifdef DEBUG_BQ35100 |
RobMeades | 2:4c699a813451 | 964 | printf("BatteryGaugeBq35100 (I2C 0x%02x): sent control word 0x%04x.\n", gAddress >> 1, controlWord); |
RobMeades | 2:4c699a813451 | 965 | #endif |
RobMeades | 2:4c699a813451 | 966 | } |
RobMeades | 2:4c699a813451 | 967 | } |
RobMeades | 2:4c699a813451 | 968 | |
RobMeades | 2:4c699a813451 | 969 | gpI2c->unlock(); |
RobMeades | 2:4c699a813451 | 970 | } |
RobMeades | 2:4c699a813451 | 971 | |
RobMeades | 2:4c699a813451 | 972 | return success; |
RobMeades | 2:4c699a813451 | 973 | } |
RobMeades | 2:4c699a813451 | 974 | |
RobMeades | 2:4c699a813451 | 975 | // Read two bytes starting at a given address on the chip. |
RobMeades | 2:4c699a813451 | 976 | bool BatteryGaugeBq35100::advancedGet(uint8_t address, uint16_t *pDataReturned) |
RobMeades | 2:4c699a813451 | 977 | { |
RobMeades | 2:4c699a813451 | 978 | bool success = false; |
RobMeades | 2:4c699a813451 | 979 | uint16_t value = 0; |
RobMeades | 2:4c699a813451 | 980 | |
RobMeades | 2:4c699a813451 | 981 | if (gReady) { |
RobMeades | 2:4c699a813451 | 982 | // Make sure there's a recent reading, as most |
RobMeades | 2:4c699a813451 | 983 | // of these commands involve the chip having done one |
RobMeades | 2:4c699a813451 | 984 | if (makeAdcReading()) { |
RobMeades | 2:4c699a813451 | 985 | gpI2c->lock(); |
RobMeades | 2:4c699a813451 | 986 | // Read the data |
RobMeades | 2:4c699a813451 | 987 | if (getTwoBytes(address, &value)) { |
RobMeades | 2:4c699a813451 | 988 | success = true; |
RobMeades | 2:4c699a813451 | 989 | #ifdef DEBUG_BQ35100 |
RobMeades | 2:4c699a813451 | 990 | printf("BatteryGaugeBq35100 (I2C 0x%02x): read 0x%04x from addresses 0x%02x and 0x%02x.\n", gAddress >> 1, value, address, address + 1); |
RobMeades | 2:4c699a813451 | 991 | #endif |
RobMeades | 2:4c699a813451 | 992 | if (pDataReturned != NULL) { |
RobMeades | 2:4c699a813451 | 993 | *pDataReturned = value; |
RobMeades | 2:4c699a813451 | 994 | } |
RobMeades | 2:4c699a813451 | 995 | } |
RobMeades | 2:4c699a813451 | 996 | gpI2c->unlock(); |
RobMeades | 2:4c699a813451 | 997 | } |
RobMeades | 2:4c699a813451 | 998 | } |
RobMeades | 2:4c699a813451 | 999 | |
RobMeades | 2:4c699a813451 | 1000 | return success; |
RobMeades | 2:4c699a813451 | 1001 | } |
RobMeades | 2:4c699a813451 | 1002 | |
RobMeades | 1:ee7cc8d75283 | 1003 | // Get the security mode of the chip. |
RobMeades | 1:ee7cc8d75283 | 1004 | BatteryGaugeBq35100::SecurityMode BatteryGaugeBq35100::advancedGetSecurityMode(void) |
RobMeades | 1:ee7cc8d75283 | 1005 | { |
RobMeades | 1:ee7cc8d75283 | 1006 | SecurityMode securityMode = SECURITY_MODE_UNKNOWN; |
RobMeades | 1:ee7cc8d75283 | 1007 | |
RobMeades | 1:ee7cc8d75283 | 1008 | if (gReady) { |
RobMeades | 1:ee7cc8d75283 | 1009 | gpI2c->lock(); |
RobMeades | 1:ee7cc8d75283 | 1010 | |
RobMeades | 2:4c699a813451 | 1011 | securityMode = getSecurityMode(); |
RobMeades | 1:ee7cc8d75283 | 1012 | |
RobMeades | 1:ee7cc8d75283 | 1013 | gpI2c->unlock(); |
RobMeades | 1:ee7cc8d75283 | 1014 | } |
RobMeades | 1:ee7cc8d75283 | 1015 | |
RobMeades | 1:ee7cc8d75283 | 1016 | return securityMode; |
RobMeades | 1:ee7cc8d75283 | 1017 | } |
RobMeades | 1:ee7cc8d75283 | 1018 | |
RobMeades | 1:ee7cc8d75283 | 1019 | // Set the security mode of the chip. |
RobMeades | 1:ee7cc8d75283 | 1020 | bool BatteryGaugeBq35100::advancedSetSecurityMode(SecurityMode securityMode) |
RobMeades | 1:ee7cc8d75283 | 1021 | { |
RobMeades | 1:ee7cc8d75283 | 1022 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 1023 | |
RobMeades | 1:ee7cc8d75283 | 1024 | if (gReady) { |
RobMeades | 1:ee7cc8d75283 | 1025 | gpI2c->lock(); |
RobMeades | 1:ee7cc8d75283 | 1026 | |
RobMeades | 1:ee7cc8d75283 | 1027 | success = setSecurityMode(securityMode); |
RobMeades | 1:ee7cc8d75283 | 1028 | |
RobMeades | 1:ee7cc8d75283 | 1029 | gpI2c->unlock(); |
RobMeades | 1:ee7cc8d75283 | 1030 | } |
RobMeades | 1:ee7cc8d75283 | 1031 | |
RobMeades | 1:ee7cc8d75283 | 1032 | return success; |
RobMeades | 1:ee7cc8d75283 | 1033 | } |
RobMeades | 1:ee7cc8d75283 | 1034 | |
RobMeades | 1:ee7cc8d75283 | 1035 | // Do a hard reset of the chip. |
RobMeades | 1:ee7cc8d75283 | 1036 | bool BatteryGaugeBq35100::advancedReset(void) |
RobMeades | 1:ee7cc8d75283 | 1037 | { |
RobMeades | 1:ee7cc8d75283 | 1038 | bool success = false; |
RobMeades | 1:ee7cc8d75283 | 1039 | SecurityMode securityMode; |
RobMeades | 1:ee7cc8d75283 | 1040 | char data[3]; |
RobMeades | 1:ee7cc8d75283 | 1041 | |
RobMeades | 2:4c699a813451 | 1042 | if (gReady) { |
RobMeades | 1:ee7cc8d75283 | 1043 | gpI2c->lock(); |
RobMeades | 1:ee7cc8d75283 | 1044 | |
RobMeades | 1:ee7cc8d75283 | 1045 | securityMode = getSecurityMode(); // Must be inside lock() |
RobMeades | 1:ee7cc8d75283 | 1046 | // Handle unsealing, as this command only works when unsealed |
RobMeades | 1:ee7cc8d75283 | 1047 | if (setSecurityMode(SECURITY_MODE_UNSEALED)) { |
RobMeades | 1:ee7cc8d75283 | 1048 | // Send a RESET sub-command |
RobMeades | 2:4c699a813451 | 1049 | data[0] = 0x3e; // Set address to ManufacturerAccessControl |
RobMeades | 1:ee7cc8d75283 | 1050 | data[1] = 0x41; // First byte of RESET sub-command (0x41) |
RobMeades | 1:ee7cc8d75283 | 1051 | data[2] = 0x00; // Second byte of RESET sub-command (0x00) (register address will auto-increment) |
RobMeades | 1:ee7cc8d75283 | 1052 | |
RobMeades | 1:ee7cc8d75283 | 1053 | if (gpI2c->write(gAddress, &(data[0]), 3) == 0) { |
RobMeades | 1:ee7cc8d75283 | 1054 | success = true; |
RobMeades | 1:ee7cc8d75283 | 1055 | #ifdef DEBUG_BQ35100 |
RobMeades | 1:ee7cc8d75283 | 1056 | printf("BatteryGaugeBq35100 (I2C 0x%02x): chip hard reset.\n", gAddress >> 1); |
RobMeades | 1:ee7cc8d75283 | 1057 | #endif |
RobMeades | 1:ee7cc8d75283 | 1058 | } |
RobMeades | 1:ee7cc8d75283 | 1059 | |
RobMeades | 1:ee7cc8d75283 | 1060 | // Set the security mode back to what it was |
RobMeades | 1:ee7cc8d75283 | 1061 | if (!setSecurityMode(securityMode)) { |
RobMeades | 1:ee7cc8d75283 | 1062 | success = false; |
RobMeades | 1:ee7cc8d75283 | 1063 | } |
RobMeades | 1:ee7cc8d75283 | 1064 | } |
RobMeades | 1:ee7cc8d75283 | 1065 | |
RobMeades | 1:ee7cc8d75283 | 1066 | gpI2c->unlock(); |
RobMeades | 1:ee7cc8d75283 | 1067 | } |
RobMeades | 1:ee7cc8d75283 | 1068 | |
RobMeades | 1:ee7cc8d75283 | 1069 | return success; |
RobMeades | 1:ee7cc8d75283 | 1070 | } |
RobMeades | 1:ee7cc8d75283 | 1071 | |
RobMeades | 0:cec745c014b7 | 1072 | /* End Of File */ |