u-blox / Mbed OS example-battery-gauge-bq27441

Example program to demonstrate the use of the BatteryGaugeBQ27441 class.

Dependencies:   battery-gauge-bq27441

main.cpp@1:7af88dc66286, 2017-06-06 (annotated)

Committer:
rob.meades@u-blox.com
Date:
Tue Jun 06 15:59:11 2017 +0100
Revision:
1:7af88dc66286
Parent:
0:bb556c2ee1f7
Child:
6:61df9e6e2871
Flesh out the example properly.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
RobMeades 0:bb556c2ee1f7 1 /* mbed Microcontroller Library
RobMeades 0:bb556c2ee1f7 2 * Copyright (c) 2017 u-blox
RobMeades 0:bb556c2ee1f7 3 *
RobMeades 0:bb556c2ee1f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
RobMeades 0:bb556c2ee1f7 5 * you may not use this file except in compliance with the License.
RobMeades 0:bb556c2ee1f7 6 * You may obtain a copy of the License at
RobMeades 0:bb556c2ee1f7 7 *
RobMeades 0:bb556c2ee1f7 8 * http://www.apache.org/licenses/LICENSE-2.0
RobMeades 0:bb556c2ee1f7 9 *
RobMeades 0:bb556c2ee1f7 10 * Unless required by applicable law or agreed to in writing, software
RobMeades 0:bb556c2ee1f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
RobMeades 0:bb556c2ee1f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
RobMeades 0:bb556c2ee1f7 13 * See the License for the specific language governing permissions and
RobMeades 0:bb556c2ee1f7 14 * limitations under the License.
RobMeades 0:bb556c2ee1f7 15 */
RobMeades 0:bb556c2ee1f7 16
RobMeades 0:bb556c2ee1f7 17 #include "mbed.h"
RobMeades 0:bb556c2ee1f7 18 #include "battery_gauge_bq27441.h"
RobMeades 0:bb556c2ee1f7 19
RobMeades 0:bb556c2ee1f7 20 // LEDs
RobMeades 0:bb556c2ee1f7 21 DigitalOut ledRed(LED1, 1);
RobMeades 0:bb556c2ee1f7 22 DigitalOut ledGreen(LED2, 1);
RobMeades 0:bb556c2ee1f7 23
RobMeades 0:bb556c2ee1f7 24 /* This example program for the u-blox C030 board instantiates
rob.meades@u-blox.com 1:7af88dc66286 25 * the BQ27441 battery gauge and performs a few example calls to
rob.meades@u-blox.com 1:7af88dc66286 26 * the battery gauge API. Progress may be monitored with a
rob.meades@u-blox.com 1:7af88dc66286 27 * serial terminal running at 9600 baud. The LED on the C030
rob.meades@u-blox.com 1:7af88dc66286 28 * board will turn green when this program is operating correctly
rob.meades@u-blox.com 1:7af88dc66286 29 * and will turn red if there is a failure.
RobMeades 0:bb556c2ee1f7 30 */
RobMeades 0:bb556c2ee1f7 31
RobMeades 0:bb556c2ee1f7 32 int main()
RobMeades 0:bb556c2ee1f7 33 {
rob.meades@u-blox.com 1:7af88dc66286 34 I2C i2C(I2C_SDA_B, I2C_SCL_B);
RobMeades 0:bb556c2ee1f7 35 BatteryGaugeBq27441 gauge;
rob.meades@u-blox.com 1:7af88dc66286 36 int32_t reading;
rob.meades@u-blox.com 1:7af88dc66286 37 bool stop = false;
RobMeades 0:bb556c2ee1f7 38
rob.meades@u-blox.com 1:7af88dc66286 39 printf ("Starting up...\n");
rob.meades@u-blox.com 1:7af88dc66286 40 if (gauge.init(&i2C)) {
rob.meades@u-blox.com 1:7af88dc66286 41 printf ("BQ27441 battery gauge chip is initialised.\n");
rob.meades@u-blox.com 1:7af88dc66286 42 while (!stop) {
rob.meades@u-blox.com 1:7af88dc66286 43 if (gauge.isBatteryDetected()) {
rob.meades@u-blox.com 1:7af88dc66286 44 if (!gauge.isGaugeEnabled()) {
rob.meades@u-blox.com 1:7af88dc66286 45 gauge.enableGauge();
rob.meades@u-blox.com 1:7af88dc66286 46 }
rob.meades@u-blox.com 1:7af88dc66286 47 if (gauge.isGaugeEnabled()) {
rob.meades@u-blox.com 1:7af88dc66286 48 // All is good, gauging is enabled, take a few readings
rob.meades@u-blox.com 1:7af88dc66286 49 ledGreen = 0;
rob.meades@u-blox.com 1:7af88dc66286 50 ledRed = 1;
rob.meades@u-blox.com 1:7af88dc66286 51
rob.meades@u-blox.com 1:7af88dc66286 52 if (gauge.getRemainingPercentage(&reading)) {
rob.meades@u-blox.com 1:7af88dc66286 53 printf("Remaining battery percentage: %d%%.\n", (int) reading);
rob.meades@u-blox.com 1:7af88dc66286 54 } else {
rob.meades@u-blox.com 1:7af88dc66286 55 ledGreen = 1;
rob.meades@u-blox.com 1:7af88dc66286 56 ledRed = 0;
rob.meades@u-blox.com 1:7af88dc66286 57 wait_ms(1000);
rob.meades@u-blox.com 1:7af88dc66286 58 }
rob.meades@u-blox.com 1:7af88dc66286 59
rob.meades@u-blox.com 1:7af88dc66286 60 if (gauge.getRemainingCapacity(&reading)) {
rob.meades@u-blox.com 1:7af88dc66286 61 printf("Remaining battery capacity: %.3f Ah.\n", ((float) reading) / 1000);
rob.meades@u-blox.com 1:7af88dc66286 62 } else {
rob.meades@u-blox.com 1:7af88dc66286 63 ledGreen = 1;
rob.meades@u-blox.com 1:7af88dc66286 64 ledRed = 0;
rob.meades@u-blox.com 1:7af88dc66286 65 wait_ms(1000);
rob.meades@u-blox.com 1:7af88dc66286 66 }
rob.meades@u-blox.com 1:7af88dc66286 67
rob.meades@u-blox.com 1:7af88dc66286 68 if (gauge.getVoltage(&reading)) {
rob.meades@u-blox.com 1:7af88dc66286 69 printf("Battery voltage: %.3f V.\n", ((float) reading) / 1000);
rob.meades@u-blox.com 1:7af88dc66286 70 } else {
rob.meades@u-blox.com 1:7af88dc66286 71 ledGreen = 1;
rob.meades@u-blox.com 1:7af88dc66286 72 ledRed = 0;
rob.meades@u-blox.com 1:7af88dc66286 73 wait_ms(1000);
rob.meades@u-blox.com 1:7af88dc66286 74 }
rob.meades@u-blox.com 1:7af88dc66286 75
rob.meades@u-blox.com 1:7af88dc66286 76 if (gauge.getCurrent(&reading)) {
rob.meades@u-blox.com 1:7af88dc66286 77 printf("Current drawn from battery: %.3f A.\n", ((float) reading) / 1000);
rob.meades@u-blox.com 1:7af88dc66286 78 } else {
rob.meades@u-blox.com 1:7af88dc66286 79 ledGreen = 1;
rob.meades@u-blox.com 1:7af88dc66286 80 ledRed = 0;
rob.meades@u-blox.com 1:7af88dc66286 81 wait_ms(1000);
rob.meades@u-blox.com 1:7af88dc66286 82 }
rob.meades@u-blox.com 1:7af88dc66286 83
rob.meades@u-blox.com 1:7af88dc66286 84 if (gauge.getTemperature(&reading)) {
rob.meades@u-blox.com 1:7af88dc66286 85 printf("BQ27441 chip temperature: %d C.\n", (int) reading);
rob.meades@u-blox.com 1:7af88dc66286 86 } else {
rob.meades@u-blox.com 1:7af88dc66286 87 ledGreen = 1;
rob.meades@u-blox.com 1:7af88dc66286 88 ledRed = 0;
rob.meades@u-blox.com 1:7af88dc66286 89 wait_ms(1000);
rob.meades@u-blox.com 1:7af88dc66286 90 }
rob.meades@u-blox.com 1:7af88dc66286 91
rob.meades@u-blox.com 1:7af88dc66286 92 } else {
rob.meades@u-blox.com 1:7af88dc66286 93 printf("Battery gauge could not be enabled.\n");
rob.meades@u-blox.com 1:7af88dc66286 94 stop = true;
rob.meades@u-blox.com 1:7af88dc66286 95 }
rob.meades@u-blox.com 1:7af88dc66286 96 } else {
rob.meades@u-blox.com 1:7af88dc66286 97 ledGreen = 1;
rob.meades@u-blox.com 1:7af88dc66286 98 ledRed = 0;
rob.meades@u-blox.com 1:7af88dc66286 99 printf("Battery not detected.\n");
rob.meades@u-blox.com 1:7af88dc66286 100 }
rob.meades@u-blox.com 1:7af88dc66286 101
rob.meades@u-blox.com 1:7af88dc66286 102 wait_ms(5000);
rob.meades@u-blox.com 1:7af88dc66286 103 }
RobMeades 0:bb556c2ee1f7 104 }
rob.meades@u-blox.com 1:7af88dc66286 105
rob.meades@u-blox.com 1:7af88dc66286 106 ledGreen = 1;
rob.meades@u-blox.com 1:7af88dc66286 107 ledRed = 0;
rob.meades@u-blox.com 1:7af88dc66286 108 printf("Should never get here.\n");
rob.meades@u-blox.com 1:7af88dc66286 109 MBED_ASSERT(false);
RobMeades 0:bb556c2ee1f7 110 }
RobMeades 0:bb556c2ee1f7 111
RobMeades 0:bb556c2ee1f7 112 // End Of File