28 lines
942 B
C++
28 lines
942 B
C++
#include "AP_BattMonitor_SMBus_Rotoye.h"
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#include <AP_HAL/AP_HAL.h>
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// Specific to Rotoye Batmon
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#define BATTMONITOR_SMBUS_TEMP_EXT 0x48
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// return the maximum of the internal and external temperature sensors
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void AP_BattMonitor_SMBus_Rotoye::read_temp(void) {
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uint16_t t_int = 0;
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uint16_t t_ext = 0;
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/* Both internal and external values will always be sent by Batmon.
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If no external thermistor is used, a zero-value is sent. */
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const bool have_temp_internal = read_word(BATTMONITOR_SMBUS_TEMP, t_int);
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const bool have_temp_external = read_word(BATTMONITOR_SMBUS_TEMP_EXT, t_ext);
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if (!have_temp_internal && !have_temp_external) {
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_has_temperature = (AP_HAL::millis() - _state.temperature_time) <= AP_BATT_MONITOR_TIMEOUT;
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return;
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}
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_has_temperature = true;
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_state.temperature_time = AP_HAL::millis();
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_state.temperature = KELVIN_TO_C(0.1f * float(MAX(t_int, t_ext)));
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}
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