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SMBus :expanded SoloBMS to 6s

This commit is contained in:
AndKe 2023-05-03 15:30:56 +02:00 committed by Peter Barker
parent f5beb4772d
commit 2030e6c9e2
2 changed files with 24 additions and 2 deletions
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25
libraries/AP_BattMonitor/AP_BattMonitor_SMBus_Solo.cpp
View File

@ -11,9 +11,11 @@
#include "AP_BattMonitor_SMBus_Solo.h"
#define BATTMONITOR_SMBUS_SOLO_CELL_VOLTAGE 0x28 // cell voltage register
#define BATTMONITOR_SMBUS_SOLO_CELL_VOLTAGE_EXT 0x29 // cell voltage register up to 6s
#define BATTMONITOR_SMBUS_SOLO_CURRENT 0x2a // current register
#define BATTMONITOR_SMBUS_SOLO_BUTTON_DEBOUNCE 6 // button held down for 5 intervals will cause a power off event
#define BATTMONITOR_SMBUS_SOLO_NUM_CELLS 4 // solo's battery pack is 4S
#define BATTMONITOR_SMBUS_SOLO_NUM_CELLS_EXT 6 // extended BMS supports up to 6s
/*
* Other potentially useful registers, listed here for future use
@ -39,12 +41,12 @@ AP_BattMonitor_SMBus_Solo::AP_BattMonitor_SMBus_Solo(AP_BattMonitor &mon,
void AP_BattMonitor_SMBus_Solo::timer()
{
uint8_t buff[8];
uint8_t buff[12];
uint32_t tnow = AP_HAL::micros();
// read cell voltages
if (read_block(BATTMONITOR_SMBUS_SOLO_CELL_VOLTAGE, buff, 8)) {
if (!_use_extended && read_block(BATTMONITOR_SMBUS_SOLO_CELL_VOLTAGE, buff, 8)) {
float pack_voltage_mv = 0.0f;
for (uint8_t i = 0; i < BATTMONITOR_SMBUS_SOLO_NUM_CELLS; i++) {
uint16_t cell = buff[(i * 2) + 1] << 8 | buff[i * 2];
@ -62,6 +64,25 @@ void AP_BattMonitor_SMBus_Solo::timer()
_state.healthy = true;
}
// read extended cell voltages
if (read_block(BATTMONITOR_SMBUS_SOLO_CELL_VOLTAGE_EXT, buff, 12)) {
float pack_voltage_mv = 0.0f;
for (uint8_t i = 0; i < BATTMONITOR_SMBUS_SOLO_NUM_CELLS_EXT; i++) {
uint16_t cell = buff[(i * 2) + 1] << 8 | buff[i * 2];
_state.cell_voltages.cells[i] = cell;
pack_voltage_mv += (float)cell;
}
_has_cell_voltages = true;
// accumulate the pack voltage out of the total of the cells
_state.voltage = pack_voltage_mv * 1e-3f;
_state.last_time_micros = tnow;
_state.healthy = true;
// stop reqesting 4-cell packets.
_use_extended = true;
}
// timeout after 5 seconds
if ((tnow - _state.last_time_micros) > AP_BATTMONITOR_SMBUS_TIMEOUT_MICROS) {
_state.healthy = false;

1
libraries/AP_BattMonitor/AP_BattMonitor_SMBus_Solo.h
View File

@ -18,6 +18,7 @@ private:
void timer(void) override;
uint8_t _button_press_count;
bool _use_extended;
};
#endif // AP_BATTERY_SMBUS_SOLO_ENABLED