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ardupilot/libraries/AP_BattMonitor/AP_BattMonitor.cpp

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#include "AP_BattMonitor.h"
#include "AP_BattMonitor_Analog.h"
#include "AP_BattMonitor_SMBus.h"
#include "AP_BattMonitor_Bebop.h"
#if HAL_WITH_UAVCAN
#include "AP_BattMonitor_UAVCAN.h"
#endif
#include <AP_Vehicle/AP_Vehicle_Type.h>
#include <DataFlash/DataFlash.h>
#include <GCS_MAVLink/GCS.h>
extern const AP_HAL::HAL& hal;
AP_BattMonitor *AP_BattMonitor::_singleton;
const AP_Param::GroupInfo AP_BattMonitor::var_info[] = {
// 0 - 18, 20- 22 used by old parameter indexes
// @Group: _
// @Path: AP_BattMonitor_Params.cpp
AP_SUBGROUPINFO_FLAGS(_params[0], "_", 23, AP_BattMonitor, AP_BattMonitor_Params, AP_PARAM_FLAG_IGNORE_ENABLE),
// @Group: 2_
// @Path: AP_BattMonitor_Params.cpp
AP_SUBGROUPINFO(_params[1], "2_", 24, AP_BattMonitor, AP_BattMonitor_Params),
AP_GROUPEND
};
// Default constructor.
// Note that the Vector/Matrix constructors already implicitly zero
// their values.
//
AP_BattMonitor::AP_BattMonitor(uint32_t log_battery_bit, battery_failsafe_handler_fn_t battery_failsafe_handler_fn, const int8_t *failsafe_priorities) :
_log_battery_bit(log_battery_bit),
_num_instances(0),
_battery_failsafe_handler_fn(battery_failsafe_handler_fn),
_failsafe_priorities(failsafe_priorities)
{
AP_Param::setup_object_defaults(this, var_info);
if (_singleton != nullptr) {
AP_HAL::panic("AP_BattMonitor must be singleton");
}
_singleton = this;
}
// init - instantiate the battery monitors
void
AP_BattMonitor::init()
{
// check init has not been called before
if (_num_instances != 0) {
return;
}
_highest_failsafe_priority = INT8_MAX;
convert_params();
#if CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_BEBOP || CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_DISCO
// force monitor for bebop
_params[0]._type.set(AP_BattMonitor_Params::BattMonitor_TYPE_BEBOP);
#endif
// create each instance
for (uint8_t instance=0; instance<AP_BATT_MONITOR_MAX_INSTANCES; instance++) {
// clear out the cell voltages
memset(&state[instance].cell_voltages, 0xFF, sizeof(cells));
switch (get_type(instance)) {
case AP_BattMonitor_Params::BattMonitor_TYPE_ANALOG_VOLTAGE_ONLY:
case AP_BattMonitor_Params::BattMonitor_TYPE_ANALOG_VOLTAGE_AND_CURRENT:
drivers[instance] = new AP_BattMonitor_Analog(*this, state[instance], _params[instance]);
_num_instances++;
break;
case AP_BattMonitor_Params::BattMonitor_TYPE_SOLO:
drivers[instance] = new AP_BattMonitor_SMBus_Solo(*this, state[instance], _params[instance],
hal.i2c_mgr->get_device(AP_BATTMONITOR_SMBUS_BUS_INTERNAL, AP_BATTMONITOR_SMBUS_I2C_ADDR,
100000, true, 20));
_num_instances++;
break;
case AP_BattMonitor_Params::BattMonitor_TYPE_MAXELL:
drivers[instance] = new AP_BattMonitor_SMBus_Maxell(*this, state[instance], _params[instance],
hal.i2c_mgr->get_device(AP_BATTMONITOR_SMBUS_BUS_EXTERNAL, AP_BATTMONITOR_SMBUS_I2C_ADDR,
100000, true, 20));
_num_instances++;
break;
case AP_BattMonitor_Params::BattMonitor_TYPE_BEBOP:
#if CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_BEBOP || CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_DISCO
drivers[instance] = new AP_BattMonitor_Bebop(*this, state[instance], _params[instance]);
_num_instances++;
#endif
break;
case AP_BattMonitor_Params::BattMonitor_TYPE_UAVCAN_BatteryInfo:
#if HAL_WITH_UAVCAN
drivers[instance] = new AP_BattMonitor_UAVCAN(*this, state[instance], AP_BattMonitor_UAVCAN::UAVCAN_BATTERY_INFO, _params[instance]);
_num_instances++;
#endif
break;
case AP_BattMonitor_Params::BattMonitor_TYPE_NONE:
default:
break;
}
// call init function for each backend
if (drivers[instance] != nullptr) {
drivers[instance]->init();
}
}
}
void AP_BattMonitor::convert_params(void) {
if (_params[0]._type.configured_in_storage()) {
// _params[0]._type will always be configured in storage after conversion is done the first time
return;
}
#define SECOND_BATT_CONVERT_MASK 0x80
const struct ConversionTable {
uint8_t old_element;
uint8_t new_index; // upper bit used to indicate if its the first or second instance
}conversionTable[22] = {
{ 0, 0 }, // _MONITOR
{ 1, 1 }, // _VOLT_PIN
{ 2, 2 }, // _CURR_PIN
{ 3, 3 }, // _VOLT_MULT
{ 4, 4 }, // _AMP_PERVOLT
{ 5, 5 }, // _AMP_OFFSET
{ 6, 6 }, // _CAPACITY
{ 9, 7 }, // _WATT_MAX
{10, 8 }, // _SERIAL_NUM
{11, (SECOND_BATT_CONVERT_MASK | 0)}, // 2_MONITOR
{12, (SECOND_BATT_CONVERT_MASK | 1)}, // 2_VOLT_PIN
{13, (SECOND_BATT_CONVERT_MASK | 2)}, // 2_CURR_PIN
{14, (SECOND_BATT_CONVERT_MASK | 3)}, // 2_VOLT_MULT
{15, (SECOND_BATT_CONVERT_MASK | 4)}, // 2_AMP_PERVOLT
{16, (SECOND_BATT_CONVERT_MASK | 5)}, // 2_AMP_OFFSET
{17, (SECOND_BATT_CONVERT_MASK | 6)}, // 2_CAPACITY
{18, (SECOND_BATT_CONVERT_MASK | 7)}, // 2_WATT_MAX
{20, (SECOND_BATT_CONVERT_MASK | 8)}, // 2_SERIAL_NUM
{21, 9 }, // _LOW_TIMER
{22, 10 }, // _LOW_TYPE
{21, (SECOND_BATT_CONVERT_MASK | 9)}, // 2_LOW_TIMER
{22, (SECOND_BATT_CONVERT_MASK |10)}, // 2_LOW_TYPE
};
char param_name[17];
AP_Param::ConversionInfo info;
info.new_name = param_name;
#if APM_BUILD_TYPE(APM_BUILD_ArduPlane)
info.old_key = 166;
#elif APM_BUILD_TYPE(APM_BUILD_ArduCopter)
info.old_key = 36;
#elif APM_BUILD_TYPE(APM_BUILD_ArduSub)
info.old_key = 33;
#elif APM_BUILD_TYPE(APM_BUILD_APMrover2)
info.old_key = 145;
#else
_params[0]._type.save(true);
return; // no conversion is supported on this platform
#endif
for (uint8_t i = 0; i < ARRAY_SIZE(conversionTable); i++) {
uint8_t param_instance = conversionTable[i].new_index >> 7;
uint8_t destination_index = 0x7F & conversionTable[i].new_index;
info.old_group_element = conversionTable[i].old_element;
info.type = (ap_var_type)AP_BattMonitor_Params::var_info[destination_index].type;
if (param_instance) {
hal.util->snprintf(param_name, 17, "BATT2_%s", AP_BattMonitor_Params::var_info[destination_index].name);
} else {
hal.util->snprintf(param_name, 17, "BATT_%s", AP_BattMonitor_Params::var_info[destination_index].name);
}
AP_Param::convert_old_parameter(&info, 1.0f, 0);
}
// force _params[0]._type into storage to flag that conversion has been done
_params[0]._type.save(true);
}
// read - read the voltage and current for all instances
void
AP_BattMonitor::read()
{
for (uint8_t i=0; i<_num_instances; i++) {
if (drivers[i] != nullptr && _params[i].type() != AP_BattMonitor_Params::BattMonitor_TYPE_NONE) {
drivers[i]->read();
drivers[i]->update_resistance_estimate();
}
}
if (get_type() != AP_BattMonitor_Params::BattMonitor_TYPE_NONE) {
AP_Notify::flags.battery_voltage = voltage();
}
DataFlash_Class *df = DataFlash_Class::instance();
if (df->should_log(_log_battery_bit)) {
df->Log_Write_Current();
df->Log_Write_Power();
}
check_failsafes();
}
// healthy - returns true if monitor is functioning
bool AP_BattMonitor::healthy(uint8_t instance) const {
return instance < _num_instances && state[instance].healthy;
}
/// has_consumed_energy - returns true if battery monitor instance provides consumed energy info
bool AP_BattMonitor::has_consumed_energy(uint8_t instance) const
{
if (instance < _num_instances && drivers[instance] != nullptr && _params[instance].type() != AP_BattMonitor_Params::BattMonitor_TYPE_NONE) {
return drivers[instance]->has_consumed_energy();
}
// not monitoring current
return false;
}
/// has_current - returns true if battery monitor instance provides current info
bool AP_BattMonitor::has_current(uint8_t instance) const
{
if (instance < _num_instances && drivers[instance] != nullptr && _params[instance].type() != AP_BattMonitor_Params::BattMonitor_TYPE_NONE) {
return drivers[instance]->has_current();
}
// not monitoring current
return false;
}
/// voltage - returns battery voltage in volts
float AP_BattMonitor::voltage(uint8_t instance) const
{
if (instance < _num_instances) {
return state[instance].voltage;
} else {
return 0.0f;
}
}
/// get voltage with sag removed (based on battery current draw and resistance)
/// this will always be greater than or equal to the raw voltage
float AP_BattMonitor::voltage_resting_estimate(uint8_t instance) const
{
if (instance < _num_instances) {
// resting voltage should always be greater than or equal to the raw voltage
return MAX(state[instance].voltage, state[instance].voltage_resting_estimate);
} else {
return 0.0f;
}
}
/// current_amps - returns the instantaneous current draw in amperes
float AP_BattMonitor::current_amps(uint8_t instance) const {
if (instance < _num_instances) {
return state[instance].current_amps;
} else {
return 0.0f;
}
}
/// consumed_mah - returns total current drawn since start-up in milliampere.hours
float AP_BattMonitor::consumed_mah(uint8_t instance) const {
if (instance < _num_instances) {
return state[instance].consumed_mah;
} else {
return 0.0f;
}
}
/// consumed_wh - returns energy consumed since start-up in Watt.hours
float AP_BattMonitor::consumed_wh(uint8_t instance) const {
if (instance < _num_instances) {
return state[instance].consumed_wh;
} else {
return 0.0f;
}
}
/// capacity_remaining_pct - returns the % battery capacity remaining (0 ~ 100)
uint8_t AP_BattMonitor::capacity_remaining_pct(uint8_t instance) const
{
if (instance < _num_instances && drivers[instance] != nullptr) {
return drivers[instance]->capacity_remaining_pct();
} else {
return 0;
}
}
/// pack_capacity_mah - returns the capacity of the battery pack in mAh when the pack is full
int32_t AP_BattMonitor::pack_capacity_mah(uint8_t instance) const
{
if (instance < AP_BATT_MONITOR_MAX_INSTANCES) {
return _params[instance]._pack_capacity;
} else {
return 0;
}
}
void AP_BattMonitor::check_failsafes(void)
{
if (hal.util->get_soft_armed()) {
for (uint8_t i = 0; i < _num_instances; i++) {
const BatteryFailsafe type = check_failsafe(i);
if (type <= state[i].failsafe) {
continue;
}
int8_t action = 0;
const char *type_str = nullptr;
switch (type) {
case AP_BattMonitor::BatteryFailsafe_None:
continue; // should not have been called in this case
case AP_BattMonitor::BatteryFailsafe_Low:
action = _params[i]._failsafe_low_action;
type_str = "low";
break;
case AP_BattMonitor::BatteryFailsafe_Critical:
action = _params[i]._failsafe_critical_action;
type_str = "critical";
break;
}
gcs().send_text(MAV_SEVERITY_WARNING, "Battery %d is %s %.2fV used %.0f mAh", i + 1, type_str,
(double)voltage(i), (double)consumed_mah(i));
_has_triggered_failsafe = true;
AP_Notify::flags.failsafe_battery = true;
state[i].failsafe = type;
// map the desired failsafe action to a prioritiy level
int8_t priority = 0;
if (_failsafe_priorities != nullptr) {
while (_failsafe_priorities[priority] != -1) {
if (_failsafe_priorities[priority] == action) {
break;
}
priority++;
}
}
// trigger failsafe if the action was equal or higher priority
// It's valid to retrigger the same action if a different battery provoked the event
if (priority <= _highest_failsafe_priority) {
_battery_failsafe_handler_fn(type_str, action);
_highest_failsafe_priority = priority;
}
}
}
}
// returns the failsafe state of the battery
AP_BattMonitor::BatteryFailsafe AP_BattMonitor::check_failsafe(const uint8_t instance)
{
// exit immediately if no monitors setup
if (_num_instances == 0 || instance >= _num_instances) {
return BatteryFailsafe_None;
}
const uint32_t now = AP_HAL::millis();
// use voltage or sag compensated voltage
float voltage_used;
switch (_params[instance].failsafe_voltage_source()) {
case AP_BattMonitor_Params::BattMonitor_LowVoltageSource_Raw:
default:
voltage_used = state[instance].voltage;
break;
case AP_BattMonitor_Params::BattMonitor_LowVoltageSource_SagCompensated:
voltage_used = voltage_resting_estimate(instance);
break;
}
// check critical battery levels
if ((voltage_used > 0) && (_params[instance]._critical_voltage > 0) && (voltage_used < _params[instance]._critical_voltage)) {
// this is the first time our voltage has dropped below minimum so start timer
if (state[instance].critical_voltage_start_ms == 0) {
state[instance].critical_voltage_start_ms = now;
} else if (_params[instance]._low_voltage_timeout > 0 &&
now - state[instance].critical_voltage_start_ms > uint32_t(_params[instance]._low_voltage_timeout)*1000U) {
return BatteryFailsafe_Critical;
}
} else {
// acceptable voltage so reset timer
state[instance].critical_voltage_start_ms = 0;
}
// check capacity if current monitoring is enabled
if (has_current(instance) && (_params[instance]._critical_capacity > 0) &&
((_params[instance]._pack_capacity - state[instance].consumed_mah) < _params[instance]._critical_capacity)) {
return BatteryFailsafe_Critical;
}
if ((voltage_used > 0) && (_params[instance]._low_voltage > 0) && (voltage_used < _params[instance]._low_voltage)) {
// this is the first time our voltage has dropped below minimum so start timer
if (state[instance].low_voltage_start_ms == 0) {
state[instance].low_voltage_start_ms = now;
} else if (_params[instance]._low_voltage_timeout > 0 &&
now - state[instance].low_voltage_start_ms > uint32_t(_params[instance]._low_voltage_timeout)*1000U) {
return BatteryFailsafe_Low;
}
} else {
// acceptable voltage so reset timer
state[instance].low_voltage_start_ms = 0;
}
// check capacity if current monitoring is enabled
if (has_current(instance) && (_params[instance]._low_capacity > 0) &&
((_params[instance]._pack_capacity - state[instance].consumed_mah) < _params[instance]._low_capacity)) {
return BatteryFailsafe_Low;
}
// if we've gotten this far then battery is ok
return BatteryFailsafe_None;
}
// return true if any battery is pushing too much power
bool AP_BattMonitor::overpower_detected() const
{
bool result = false;
for (uint8_t instance = 0; instance < _num_instances; instance++) {
result |= overpower_detected(instance);
}
return result;
}
bool AP_BattMonitor::overpower_detected(uint8_t instance) const
{
#if APM_BUILD_TYPE(APM_BUILD_ArduPlane)
if (instance < _num_instances && _params[instance]._watt_max > 0) {
float power = state[instance].current_amps * state[instance].voltage;
return state[instance].healthy && (power > _params[instance]._watt_max);
}
return false;
#else
return false;
#endif
}
bool AP_BattMonitor::has_cell_voltages(const uint8_t instance) const
{
if (instance < _num_instances && drivers[instance] != nullptr) {
return drivers[instance]->has_cell_voltages();
}
return false;
}
// return the current cell voltages, returns the first monitor instances cells if the instance is out of range
const AP_BattMonitor::cells & AP_BattMonitor::get_cell_voltages(const uint8_t instance) const
{
if (instance >= AP_BATT_MONITOR_MAX_INSTANCES) {
return state[AP_BATT_PRIMARY_INSTANCE].cell_voltages;
} else {
return state[instance].cell_voltages;
}
}
// returns true if there is a temperature reading
bool AP_BattMonitor::get_temperature(float &temperature, const uint8_t instance) const
{
if (instance >= AP_BATT_MONITOR_MAX_INSTANCES) {
return false;
} else {
temperature = state[instance].temperature;
return (AP_HAL::millis() - state[instance].temperature_time) <= AP_BATT_MONITOR_TIMEOUT;
}
}
namespace AP {
AP_BattMonitor &battery()
{
return AP_BattMonitor::battery();
}
};
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