mirror of https://github.com/ArduPilot/ardupilot
302 lines
12 KiB
C++
302 lines
12 KiB
C++
/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
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#include "AP_BattMonitor.h"
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#include "AP_BattMonitor_Analog.h"
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#include "AP_BattMonitor_SMBus.h"
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#include "AP_BattMonitor_Bebop.h"
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extern const AP_HAL::HAL& hal;
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const AP_Param::GroupInfo AP_BattMonitor::var_info[] = {
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// @Param: _MONITOR
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// @DisplayName: Battery monitoring
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// @Description: Controls enabling monitoring of the battery's voltage and current
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// @Values: 0:Disabled,3:Analog Voltage Only,4:Analog Voltage and Current,5:SMBus,6:Bebop
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// @User: Standard
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AP_GROUPINFO("_MONITOR", 0, AP_BattMonitor, _monitoring[0], BattMonitor_TYPE_NONE),
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// @Param: _VOLT_PIN
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// @DisplayName: Battery Voltage sensing pin
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// @Description: Setting this to 0 ~ 13 will enable battery voltage sensing on pins A0 ~ A13. For the 3DR power brick on APM2.5 it should be set to 13. On the PX4 it should be set to 100. On the Pixhawk powered from the PM connector it should be set to 2.
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// @Values: -1:Disabled, 0:A0, 1:A1, 2:Pixhawk, 13:A13, 100:PX4
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// @User: Standard
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AP_GROUPINFO("_VOLT_PIN", 1, AP_BattMonitor, _volt_pin[0], AP_BATT_VOLT_PIN),
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// @Param: _CURR_PIN
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// @DisplayName: Battery Current sensing pin
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// @Description: Setting this to 0 ~ 13 will enable battery current sensing on pins A0 ~ A13. For the 3DR power brick on APM2.5 it should be set to 12. On the PX4 it should be set to 101. On the Pixhawk powered from the PM connector it should be set to 3.
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// @Values: -1:Disabled, 1:A1, 2:A2, 3:Pixhawk, 12:A12, 101:PX4
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// @User: Standard
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AP_GROUPINFO("_CURR_PIN", 2, AP_BattMonitor, _curr_pin[0], AP_BATT_CURR_PIN),
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// @Param: _VOLT_MULT
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// @DisplayName: Voltage Multiplier
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// @Description: Used to convert the voltage of the voltage sensing pin (BATT_VOLT_PIN) to the actual battery's voltage (pin_voltage * VOLT_MULT). For the 3DR Power brick on APM2 or Pixhawk, this should be set to 10.1. For the Pixhawk with the 3DR 4in1 ESC this should be 12.02. For the PX4 using the PX4IO power supply this should be set to 1.
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// @User: Advanced
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AP_GROUPINFO("_VOLT_MULT", 3, AP_BattMonitor, _volt_multiplier[0], AP_BATT_VOLTDIVIDER_DEFAULT),
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// @Param: _AMP_PERVOLT
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// @DisplayName: Amps per volt
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// @Description: Number of amps that a 1V reading on the current sensor corresponds to. On the APM2 or Pixhawk using the 3DR Power brick this should be set to 17. For the Pixhawk with the 3DR 4in1 ESC this should be 17.
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// @Units: Amps/Volt
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// @User: Standard
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AP_GROUPINFO("_AMP_PERVOLT", 4, AP_BattMonitor, _curr_amp_per_volt[0], AP_BATT_CURR_AMP_PERVOLT_DEFAULT),
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// @Param: _AMP_OFFSET
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// @DisplayName: AMP offset
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// @Description: Voltage offset at zero current on current sensor
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// @Units: Volts
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// @User: Standard
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AP_GROUPINFO("_AMP_OFFSET", 5, AP_BattMonitor, _curr_amp_offset[0], 0),
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// @Param: _CAPACITY
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// @DisplayName: Battery capacity
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// @Description: Capacity of the battery in mAh when full
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// @Units: mAh
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// @Increment: 50
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// @User: Standard
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AP_GROUPINFO("_CAPACITY", 6, AP_BattMonitor, _pack_capacity[0], AP_BATT_CAPACITY_DEFAULT),
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// 7 & 8 were used for VOLT2_PIN and VOLT2_MULT
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// 9..10 left for future expansion
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#if AP_BATT_MONITOR_MAX_INSTANCES > 1
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// @Param: 2_MONITOR
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// @DisplayName: Battery monitoring
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// @Description: Controls enabling monitoring of the battery's voltage and current
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// @Values: 0:Disabled,3:Analog Voltage Only,4:Analog Voltage and Current,5:SMBus,6:Bebop
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// @User: Standard
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AP_GROUPINFO("2_MONITOR", 11, AP_BattMonitor, _monitoring[1], BattMonitor_TYPE_NONE),
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// @Param: 2_VOLT_PIN
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// @DisplayName: Battery Voltage sensing pin
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// @Description: Setting this to 0 ~ 13 will enable battery voltage sensing on pins A0 ~ A13. For the 3DR power brick on APM2.5 it should be set to 13. On the PX4 it should be set to 100. On the Pixhawk powered from the PM connector it should be set to 2.
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// @Values: -1:Disabled, 0:A0, 1:A1, 2:Pixhawk, 13:A13, 100:PX4
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// @User: Standard
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AP_GROUPINFO("2_VOLT_PIN", 12, AP_BattMonitor, _volt_pin[1], AP_BATT_VOLT_PIN),
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// @Param: 2_CURR_PIN
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// @DisplayName: Battery Current sensing pin
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// @Description: Setting this to 0 ~ 13 will enable battery current sensing on pins A0 ~ A13. For the 3DR power brick on APM2.5 it should be set to 12. On the PX4 it should be set to 101. On the Pixhawk powered from the PM connector it should be set to 3.
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// @Values: -1:Disabled, 1:A1, 2:A2, 3:Pixhawk, 12:A12, 101:PX4
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// @User: Standard
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AP_GROUPINFO("2_CURR_PIN", 13, AP_BattMonitor, _curr_pin[1], AP_BATT_CURR_PIN),
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// @Param: 2_VOLT_MULT
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// @DisplayName: Voltage Multiplier
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// @Description: Used to convert the voltage of the voltage sensing pin (BATT_VOLT_PIN) to the actual battery's voltage (pin_voltage * VOLT_MULT). For the 3DR Power brick on APM2 or Pixhawk, this should be set to 10.1. For the Pixhawk with the 3DR 4in1 ESC this should be 12.02. For the PX4 using the PX4IO power supply this should be set to 1.
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// @User: Advanced
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AP_GROUPINFO("2_VOLT_MULT", 14, AP_BattMonitor, _volt_multiplier[1], AP_BATT_VOLTDIVIDER_DEFAULT),
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// @Param: 2_AMP_PERVOL
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// @DisplayName: Amps per volt
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// @Description: Number of amps that a 1V reading on the current sensor corresponds to. On the APM2 or Pixhawk using the 3DR Power brick this should be set to 17. For the Pixhawk with the 3DR 4in1 ESC this should be 17.
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// @Units: Amps/Volt
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// @User: Standard
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AP_GROUPINFO("2_AMP_PERVOL", 15, AP_BattMonitor, _curr_amp_per_volt[1], AP_BATT_CURR_AMP_PERVOLT_DEFAULT),
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// @Param: 2_AMP_OFFSET
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// @DisplayName: AMP offset
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// @Description: Voltage offset at zero current on current sensor
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// @Units: Volts
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// @User: Standard
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AP_GROUPINFO("2_AMP_OFFSET", 16, AP_BattMonitor, _curr_amp_offset[1], 0),
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// @Param: 2_CAPACITY
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// @DisplayName: Battery capacity
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// @Description: Capacity of the battery in mAh when full
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// @Units: mAh
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// @Increment: 50
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// @User: Standard
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AP_GROUPINFO("2_CAPACITY", 17, AP_BattMonitor, _pack_capacity[1], AP_BATT_CAPACITY_DEFAULT),
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#endif // AP_BATT_MONITOR_MAX_INSTANCES > 1
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AP_GROUPEND
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};
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// Default constructor.
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// Note that the Vector/Matrix constructors already implicitly zero
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// their values.
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//
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AP_BattMonitor::AP_BattMonitor(void) :
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_num_instances(0)
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{
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AP_Param::setup_object_defaults(this, var_info);
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}
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// init - instantiate the battery monitors
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void
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AP_BattMonitor::init()
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{
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// check init has not been called before
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if (_num_instances != 0) {
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return;
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}
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#if CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_BEBOP
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// force monitor for bebop
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_monitoring[0] = BattMonitor_TYPE_BEBOP;
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#endif
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// create each instance
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for (uint8_t instance=0; instance<AP_BATT_MONITOR_MAX_INSTANCES; instance++) {
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uint8_t monitor_type = _monitoring[instance];
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switch (monitor_type) {
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case BattMonitor_TYPE_ANALOG_VOLTAGE_ONLY:
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case BattMonitor_TYPE_ANALOG_VOLTAGE_AND_CURRENT:
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state[instance].instance = instance;
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drivers[instance] = new AP_BattMonitor_Analog(*this, instance, state[instance]);
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_num_instances++;
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break;
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case BattMonitor_TYPE_SMBUS:
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state[instance].instance = instance;
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#if CONFIG_HAL_BOARD == HAL_BOARD_PX4
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drivers[instance] = new AP_BattMonitor_SMBus_PX4(*this, instance, state[instance]);
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#else
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drivers[instance] = new AP_BattMonitor_SMBus_I2C(*this, instance, state[instance]);
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#endif
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_num_instances++;
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break;
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case BattMonitor_TYPE_BEBOP:
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#if CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_BEBOP
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state[instance].instance = instance;
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drivers[instance] = new AP_BattMonitor_Bebop(*this, instance, state[instance]);
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_num_instances++;
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#endif
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break;
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}
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// call init function for each backend
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if (drivers[instance] != NULL) {
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drivers[instance]->init();
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}
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}
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}
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// read - read the voltage and current for all instances
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void
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AP_BattMonitor::read()
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{
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// exit immediately if no monitors setup
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if (_num_instances == 0) {
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return;
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}
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for (uint8_t i=0; i<AP_BATT_MONITOR_MAX_INSTANCES; i++) {
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if (drivers[i] != NULL && _monitoring[i] != BattMonitor_TYPE_NONE) {
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drivers[i]->read();
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}
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}
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}
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// healthy - returns true if monitor is functioning
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bool AP_BattMonitor::healthy(uint8_t instance) const {
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return instance < AP_BATT_MONITOR_MAX_INSTANCES && _BattMonitor_STATE(instance).healthy;
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}
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/// has_current - returns true if battery monitor instance provides current info
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bool AP_BattMonitor::has_current(uint8_t instance) const
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{
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// check for analog voltage and current monitor or smbus monitor
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if (instance < AP_BATT_MONITOR_MAX_INSTANCES) {
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if (drivers[instance] != NULL) {
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return (_monitoring[instance] == BattMonitor_TYPE_ANALOG_VOLTAGE_AND_CURRENT ||
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_monitoring[instance] == BattMonitor_TYPE_SMBUS ||
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_monitoring[instance] == BattMonitor_TYPE_BEBOP);
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}
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}
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// not monitoring current
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return false;
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}
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/// voltage - returns battery voltage in volts
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float AP_BattMonitor::voltage(uint8_t instance) const
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{
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if (instance < AP_BATT_MONITOR_MAX_INSTANCES) {
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return _BattMonitor_STATE(instance).voltage;
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} else {
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return 0.0f;
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}
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}
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// voltage2 - returns the voltage of the second battery (helper function to send 2nd voltage to GCS)
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float AP_BattMonitor::voltage2() const
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{
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// exit immediately if one or fewer monitors
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if (_num_instances < 2) {
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return 0.0f;
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}
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// get next battery's voltage
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for (uint8_t i=1; i<AP_BATT_MONITOR_MAX_INSTANCES; i++) {
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if (drivers[i] != NULL) {
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return _BattMonitor_STATE(i).voltage;
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}
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}
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// if we somehow got here, return zero
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return 0.0f;
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}
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/// current_amps - returns the instantaneous current draw in amperes
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float AP_BattMonitor::current_amps(uint8_t instance) const {
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if (instance < AP_BATT_MONITOR_MAX_INSTANCES) {
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return _BattMonitor_STATE(instance).current_amps;
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} else {
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return 0.0f;
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}
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}
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/// current_total_mah - returns total current drawn since start-up in amp-hours
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float AP_BattMonitor::current_total_mah(uint8_t instance) const {
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if (instance < AP_BATT_MONITOR_MAX_INSTANCES) {
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return _BattMonitor_STATE(instance).current_total_mah;
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} else {
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return 0.0f;
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}
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}
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/// capacity_remaining_pct - returns the % battery capacity remaining (0 ~ 100)
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uint8_t AP_BattMonitor::capacity_remaining_pct(uint8_t instance) const
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{
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if (_num_instances == 0 || instance >= AP_BATT_MONITOR_MAX_INSTANCES || drivers[instance] == NULL) {
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return 0;
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} else {
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return drivers[instance]->capacity_remaining_pct();
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}
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}
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/// exhausted - returns true if the voltage remains below the low_voltage for 10 seconds or remaining capacity falls below min_capacity_mah
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bool AP_BattMonitor::exhausted(uint8_t instance, float low_voltage, float min_capacity_mah)
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{
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// exit immediately if no monitors setup
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if (_num_instances == 0 || instance >= AP_BATT_MONITOR_MAX_INSTANCES || drivers[instance] == NULL) {
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return false;
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}
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// get current time
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uint32_t tnow = hal.scheduler->millis();
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// check voltage
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if ((state[instance].voltage > 0.0f) && (low_voltage > 0) && (state[instance].voltage < low_voltage)) {
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// this is the first time our voltage has dropped below minimum so start timer
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if (state[instance].low_voltage_start_ms == 0) {
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state[instance].low_voltage_start_ms = tnow;
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}else if (tnow - state[instance].low_voltage_start_ms > AP_BATT_LOW_VOLT_TIMEOUT_MS) {
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return true;
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}
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}else{
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// acceptable voltage so reset timer
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state[instance].low_voltage_start_ms = 0;
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}
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// check capacity if current monitoring is enabled
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if (has_current(instance) && (min_capacity_mah>0) && (_pack_capacity[instance] - state[instance].current_total_mah < min_capacity_mah)) {
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return true;
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}
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// if we've gotten this far battery is ok
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return false;
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}
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