RE: Invalid field size in some samples files

Alan — Tue, 29 Oct 2024 09:50:15 GMT

Thank you very much.

RE: Invalid field size in some samples files

Alan — Sun, 27 Oct 2024 09:55:46 GMT

OK. I see. I can see this field in profile is shown a '[N]' in array column, indicating it can be an array. Is there a way to know if a field can be array without looking up on the profile?

RE: Invalid field size in some samples files

muktihari — Sun, 27 Oct 2024 06:47:28 GMT

19 here is the field number, not the global mesg num. The field that you were looking for is 0x66 (102 in base10) which is avg_left_power_phase.

RE: Invalid field size in some samples files

muktihari — Sun, 27 Oct 2024 06:40:50 GMT

AFAIK, there will only be addition for new releases, what's changed will be published in their release notes: forums.garmin.com/.../news-announcements

RE: Invalid field size in some samples files

Alan — Sun, 27 Oct 2024 06:35:47 GMT

Thank you. If I am correct, the profile and message definitions are different from version to version. So the message definition for one version may not suitable for another?

I just check Profile.xlsx, and find the 19th field in lap message as below:

avg_power

uint16

watts

total_power / total_timer_time if non_zero_avg_power otherwise total_power / total_elapsed_time

So it seems it is neither a 8-bit field, nor a 4 element array of 8-bit, also not a 32bit field. But a 16 bit field?

RE: Invalid field size in some samples files

muktihari — Sun, 27 Oct 2024 06:22:36 GMT

The document used for code generation is Profile.xlsx that comes along with the FitSDKRelease_21.141.00.zip, you may grasp some knowledges from it even though how to read the file it's not that straightforward. For details and how the generation works I'll leave it for somebody from Garmin to answer. I hope it helps.

RE: Invalid field size in some samples files

Alan — Sun, 27 Oct 2024 04:40:15 GMT

Thank you. Then how to know if a field is an array? Based on the field type, it does not indicate whether the data is one element or several element array.

And based on the fit_example.c below:

static const FIT_LAP_MESG_DEF lap_mesg_def =
{
0, // reserved_1
FIT_ARCH_ENDIAN, // arch
FIT_MESG_NUM_LAP, // global_mesg_num
84, // num_fields
{ // field_def_num, size, base_type
FIT_LAP_FIELD_NUM_TIMESTAMP, (sizeof(FIT_DATE_TIME)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_START_TIME, (sizeof(FIT_DATE_TIME)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_START_POSITION_LAT, (sizeof(FIT_SINT32)*1), FIT_BASE_TYPE_SINT32,
FIT_LAP_FIELD_NUM_START_POSITION_LONG, (sizeof(FIT_SINT32)*1), FIT_BASE_TYPE_SINT32,
FIT_LAP_FIELD_NUM_END_POSITION_LAT, (sizeof(FIT_SINT32)*1), FIT_BASE_TYPE_SINT32,
FIT_LAP_FIELD_NUM_END_POSITION_LONG, (sizeof(FIT_SINT32)*1), FIT_BASE_TYPE_SINT32,
FIT_LAP_FIELD_NUM_TOTAL_ELAPSED_TIME, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_TOTAL_TIMER_TIME, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_TOTAL_DISTANCE, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_TOTAL_CYCLES, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_TOTAL_WORK, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_TOTAL_MOVING_TIME, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_TIME_IN_HR_ZONE, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_TIME_IN_SPEED_ZONE, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_TIME_IN_CADENCE_ZONE, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_TIME_IN_POWER_ZONE, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_ENHANCED_AVG_SPEED, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_ENHANCED_MAX_SPEED, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_ENHANCED_AVG_ALTITUDE, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_ENHANCED_MIN_ALTITUDE, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_ENHANCED_MAX_ALTITUDE, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,
FIT_LAP_FIELD_NUM_MESSAGE_INDEX, (sizeof(FIT_MESSAGE_INDEX)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_TOTAL_CALORIES, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_TOTAL_FAT_CALORIES, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_AVG_SPEED, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_MAX_SPEED, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_AVG_POWER, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_MAX_POWER, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_TOTAL_ASCENT, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_TOTAL_DESCENT, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_NUM_LENGTHS, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_NORMALIZED_POWER, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_LEFT_RIGHT_BALANCE, (sizeof(FIT_LEFT_RIGHT_BALANCE_100)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_FIRST_LENGTH_INDEX, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_AVG_STROKE_DISTANCE, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_NUM_ACTIVE_LENGTHS, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_AVG_ALTITUDE, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_MAX_ALTITUDE, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_AVG_GRADE, (sizeof(FIT_SINT16)*1), FIT_BASE_TYPE_SINT16,
FIT_LAP_FIELD_NUM_AVG_POS_GRADE, (sizeof(FIT_SINT16)*1), FIT_BASE_TYPE_SINT16,
FIT_LAP_FIELD_NUM_AVG_NEG_GRADE, (sizeof(FIT_SINT16)*1), FIT_BASE_TYPE_SINT16,
FIT_LAP_FIELD_NUM_MAX_POS_GRADE, (sizeof(FIT_SINT16)*1), FIT_BASE_TYPE_SINT16,
FIT_LAP_FIELD_NUM_MAX_NEG_GRADE, (sizeof(FIT_SINT16)*1), FIT_BASE_TYPE_SINT16,
FIT_LAP_FIELD_NUM_AVG_POS_VERTICAL_SPEED, (sizeof(FIT_SINT16)*1), FIT_BASE_TYPE_SINT16,
FIT_LAP_FIELD_NUM_AVG_NEG_VERTICAL_SPEED, (sizeof(FIT_SINT16)*1), FIT_BASE_TYPE_SINT16,
FIT_LAP_FIELD_NUM_MAX_POS_VERTICAL_SPEED, (sizeof(FIT_SINT16)*1), FIT_BASE_TYPE_SINT16,
FIT_LAP_FIELD_NUM_MAX_NEG_VERTICAL_SPEED, (sizeof(FIT_SINT16)*1), FIT_BASE_TYPE_SINT16,
FIT_LAP_FIELD_NUM_REPETITION_NUM, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_MIN_ALTITUDE, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_WKT_STEP_INDEX, (sizeof(FIT_MESSAGE_INDEX)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_OPPONENT_SCORE, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_STROKE_COUNT, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_ZONE_COUNT, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_AVG_VERTICAL_OSCILLATION, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_AVG_STANCE_TIME_PERCENT, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_AVG_STANCE_TIME, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_PLAYER_SCORE, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_AVG_TOTAL_HEMOGLOBIN_CONC, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_MIN_TOTAL_HEMOGLOBIN_CONC, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_MAX_TOTAL_HEMOGLOBIN_CONC, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_AVG_SATURATED_HEMOGLOBIN_PERCENT, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_MIN_SATURATED_HEMOGLOBIN_PERCENT, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_MAX_SATURATED_HEMOGLOBIN_PERCENT, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_AVG_VAM, (sizeof(FIT_UINT16)*1), FIT_BASE_TYPE_UINT16,
FIT_LAP_FIELD_NUM_EVENT, (sizeof(FIT_EVENT)*1), FIT_BASE_TYPE_ENUM,
FIT_LAP_FIELD_NUM_EVENT_TYPE, (sizeof(FIT_EVENT_TYPE)*1), FIT_BASE_TYPE_ENUM,
FIT_LAP_FIELD_NUM_AVG_HEART_RATE, (sizeof(FIT_UINT8)*1), FIT_BASE_TYPE_UINT8,
FIT_LAP_FIELD_NUM_MAX_HEART_RATE, (sizeof(FIT_UINT8)*1), FIT_BASE_TYPE_UINT8,
FIT_LAP_FIELD_NUM_AVG_CADENCE, (sizeof(FIT_UINT8)*1), FIT_BASE_TYPE_UINT8,
FIT_LAP_FIELD_NUM_MAX_CADENCE, (sizeof(FIT_UINT8)*1), FIT_BASE_TYPE_UINT8,
FIT_LAP_FIELD_NUM_INTENSITY, (sizeof(FIT_INTENSITY)*1), FIT_BASE_TYPE_ENUM,
FIT_LAP_FIELD_NUM_LAP_TRIGGER, (sizeof(FIT_LAP_TRIGGER)*1), FIT_BASE_TYPE_ENUM,
FIT_LAP_FIELD_NUM_SPORT, (sizeof(FIT_SPORT)*1), FIT_BASE_TYPE_ENUM,
FIT_LAP_FIELD_NUM_EVENT_GROUP, (sizeof(FIT_UINT8)*1), FIT_BASE_TYPE_UINT8,
FIT_LAP_FIELD_NUM_SWIM_STROKE, (sizeof(FIT_SWIM_STROKE)*1), FIT_BASE_TYPE_ENUM,
FIT_LAP_FIELD_NUM_SUB_SPORT, (sizeof(FIT_SUB_SPORT)*1), FIT_BASE_TYPE_ENUM,
FIT_LAP_FIELD_NUM_GPS_ACCURACY, (sizeof(FIT_UINT8)*1), FIT_BASE_TYPE_UINT8,
FIT_LAP_FIELD_NUM_AVG_TEMPERATURE, (sizeof(FIT_SINT8)*1), FIT_BASE_TYPE_SINT8,
FIT_LAP_FIELD_NUM_MAX_TEMPERATURE, (sizeof(FIT_SINT8)*1), FIT_BASE_TYPE_SINT8,
FIT_LAP_FIELD_NUM_MIN_HEART_RATE, (sizeof(FIT_UINT8)*1), FIT_BASE_TYPE_UINT8,
FIT_LAP_FIELD_NUM_AVG_FRACTIONAL_CADENCE, (sizeof(FIT_UINT8)*1), FIT_BASE_TYPE_UINT8,
FIT_LAP_FIELD_NUM_MAX_FRACTIONAL_CADENCE, (sizeof(FIT_UINT8)*1), FIT_BASE_TYPE_UINT8,
FIT_LAP_FIELD_NUM_TOTAL_FRACTIONAL_CYCLES, (sizeof(FIT_UINT8)*1), FIT_BASE_TYPE_UINT8,
FIT_LAP_FIELD_NUM_MIN_TEMPERATURE, (sizeof(FIT_SINT8)*1), FIT_BASE_TYPE_SINT8,
}
};

The 19th field is below:

FIT_LAP_FIELD_NUM_ENHANCED_MIN_ALTITUDE, (sizeof(FIT_UINT32)*1), FIT_BASE_TYPE_UINT32,

it is a 4-byte UINT32.

Also how you find the field number definition in SDK?

RE: Invalid field size in some samples files

muktihari — Sun, 27 Oct 2024 03:51:22 GMT

MesgNum 19: lap

FieldNum 0x66 (102): avg_left_power_phase

Its value is an array of uint8, how to determine: defsize%typesize ≈ 4%1 == 0 (true), how many element: 4/1=4, it means [4]uint8

Ref: developer.garmin.com/.../

The Size indicates the size of the defined field in bytes. The size may be a multiple of the underlying FIT Base Type size indicating the field contains multiple elements represented as an array.