diff options
| -rw-r--r-- | src/drivers/batt_smbus/batt_smbus.cpp | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/src/drivers/batt_smbus/batt_smbus.cpp b/src/drivers/batt_smbus/batt_smbus.cpp index a958fc60d..9f72bd56f 100644 --- a/src/drivers/batt_smbus/batt_smbus.cpp +++ b/src/drivers/batt_smbus/batt_smbus.cpp @@ -84,6 +84,7 @@ #define BATT_SMBUS_ADDR 0x0B ///< I2C address #define BATT_SMBUS_TEMP 0x08 ///< temperature register #define BATT_SMBUS_VOLTAGE 0x09 ///< voltage register +#define BATT_SMBUS_REMAINING_CAPACITY 0x0f ///< predicted remaining battery capacity as a percentage #define BATT_SMBUS_DESIGN_CAPACITY 0x18 ///< design capacity register #define BATT_SMBUS_DESIGN_VOLTAGE 0x19 ///< design voltage register #define BATT_SMBUS_SERIALNUM 0x1c ///< serial number register @@ -179,6 +180,7 @@ private: orb_advert_t _batt_topic; ///< uORB battery topic orb_id_t _batt_orb_id; ///< uORB battery topic ID uint64_t _start_time; ///< system time we first attempt to communicate with battery + uint16_t _batt_design_capacity; ///< battery's design capacity in mAh (0 means unknown) }; namespace @@ -197,7 +199,8 @@ BATT_SMBUS::BATT_SMBUS(int bus, uint16_t batt_smbus_addr) : _reports(nullptr), _batt_topic(-1), _batt_orb_id(nullptr), - _start_time(0) + _start_time(0), + _batt_design_capacity(0) { // work_cancel in the dtor will explode if we don't do this... memset(&_work, 0, sizeof(_work)); @@ -263,7 +266,7 @@ BATT_SMBUS::test() if (updated) { if (orb_copy(ORB_ID(battery_status), sub, &status) == OK) { - warnx("V=%4.2f C=%4.2f", status.voltage_v, status.current_a); + warnx("V=%4.2f C=%4.2f DismAh=%4.2f", (float)status.voltage_v, (float)status.current_a, (float)status.discharged_mah); } } @@ -279,6 +282,7 @@ BATT_SMBUS::search() { bool found_slave = false; uint16_t tmp; + int16_t orig_addr = get_address(); // search through all valid SMBus addresses for (uint8_t i = BATT_SMBUS_ADDR_MIN; i <= BATT_SMBUS_ADDR_MAX; i++) { @@ -293,6 +297,9 @@ BATT_SMBUS::search() usleep(1); } + // restore original i2c address + set_address(orig_addr); + // display completion message if (found_slave) { warnx("Done."); @@ -364,13 +371,28 @@ BATT_SMBUS::cycle() new_report.voltage_v = ((float)tmp) / 1000.0f; // read current - usleep(1); uint8_t buff[4]; if (read_block(BATT_SMBUS_CURRENT, buff, 4, false) == 4) { new_report.current_a = -(float)((int32_t)((uint32_t)buff[3] << 24 | (uint32_t)buff[2] << 16 | (uint32_t)buff[1] << 8 | (uint32_t)buff[0])) / 1000.0f; } + // read battery design capacity + if (_batt_design_capacity == 0) { + if (read_reg(BATT_SMBUS_DESIGN_CAPACITY, tmp) == OK) { + _batt_design_capacity = tmp; + } + } + + // read remaining capacity + if (_batt_design_capacity > 0) { + if (read_reg(BATT_SMBUS_REMAINING_CAPACITY, tmp) == OK) { + if (tmp < _batt_design_capacity) { + new_report.discharged_mah = _batt_design_capacity - tmp; + } + } + } + // publish to orb if (_batt_topic != -1) { orb_publish(_batt_orb_id, _batt_topic, &new_report); @@ -430,8 +452,6 @@ BATT_SMBUS::read_block(uint8_t reg, uint8_t *data, uint8_t max_len, bool append_ { uint8_t buff[max_len + 2]; // buffer to hold results - usleep(1); - // read bytes including PEC int ret = transfer(®, 1, buff, max_len + 2); |