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Code: Select all

- (void)updateRowingMachineWithData:(NSData*)data
{
    uint32_t time;
    [data getBytes:&time range:NSMakeRange(0, 3)];
    
    NSTimeInterval elapsed = (NSTimeInterval)time * 0.01;
    
    // HEY, what's this about?
    // I noticed that from time to time in the log, there would be what looked to be bogus data.
    // Assuming it came back from the rower like that.  Therefore ignoring it.
    if (elapsed > 27300000) {
        DDLogWarn(@"Bad data came back from the rower.  Ignoring this payload");
        return;
    }
    
    _rower.elapsedTimeInSeconds = elapsed;

    // distance
    uint32_t distance;
    [data getBytes:&distance range:NSMakeRange(3, 3)];
    _rower.distanceInMeters = (Float32)distance * 0.1f;
    
    // workout type
    uint8_t wType;
    [data getBytes:&wType range:NSMakeRange(6, 1)];
    _rower.workoutType = (OBJ_WORKOUTTYPE_T)wType;
    
    // interval type
    uint8_t iType;
    [data getBytes:&iType range:NSMakeRange(7, 1)];
    _rower.intervalType = (OBJ_INTERVALTYPE_T)iType;
    
    // workout state
    uint8_t wState;
    [data getBytes:&wState range:NSMakeRange(8, 1)];
    _rower.workoutState = (OBJ_WORKOUTSTATE_T)wState;

    // rowing state
    uint8_t rState;
    [data getBytes:&rState range:NSMakeRange(9, 1)];
    _rower.rowingState = (OBJ_ROWINGSTATE_T)rState;
    
    // stroke state
    uint8_t sState;
    [data getBytes:&sState range:NSMakeRange(10, 1)];
    _rower.strokeState = (OBJ_STROKESTATE_T)sState;

    // total work distance.  TODO:  check if it's 0.1 LSB, as it's not clear in dox
    uint32_t twDistance;
    [data getBytes:&twDistance range:NSMakeRange(11, 3)];
    _rower.totalWorkDistanceInMeters = (float)twDistance * 0.1f;
    
    // workout duration
    uint32_t wDuration;
    [data getBytes:&wDuration range:NSMakeRange(14, 3)];
    _rower.workoutDurationInSeconds = (float)wDuration * 0.01f;
    
    // duration type
    uint8_t dType;
    [data getBytes:&dType range:NSMakeRange(17, 1)];
    _rower.workoutDurationType = (DurationTypes)dType;
    
    // drag factor
    uint8_t drag;
    [data getBytes:&drag range:NSMakeRange(18, 1)];
    _rower.dragFactor = (int)drag;
    
    if (YES) {
        DDLogVerbose(@"t:%.1fs \t dst: %.1fm, wktTp: %@, intTp: %@, wktSt: %@, row: %@, stk: %@, wktDurTp: %@ ",
                     _rower.elapsedTimeInSeconds,
                     _rower.distanceInMeters,
                     NSStringFromWorkoutType(_rower.workoutType),
                     NSStringFromIntervalType(_rower.intervalType),
                     NSStringFromWorkoutState(_rower.workoutState),
                     NSStringFromRowingState(_rower.rowingState),
                     NSStringFromStrokeState(_rower.strokeState),
                     NSStringFromDurationType(_rower.workoutDurationType)
                     );

    }
}

Code: Select all

var values = Array<UInt8>(count:data.length, repeatedValue:0) // Mutable Array
data.getBytes(&values, length:data.length)
let time: UInt32 = (values.count <  3) ? 0 : UInt32(values[0]) + UInt32(values[1])  * 256 + UInt32(values[2])  * 65536
let distance: UInt32 = (values.count <  6) ? 0 : UInt32(values[3]) + UInt32(values[4])  * 256 + UInt32(values[5])  * 65536 
let wType: UInt8 = (values.count <  7) ? 0 : values[6]
// etc

// or as Doubles (float):

var values = Array<UInt8>(count:data.length, repeatedValue:0) // Mutable Array
data.getBytes(&values, length:data.length)
let dValues = values.map({ return Double($0) })
_rower.elapsedTime = (dValues.count <  3) ? 0.0 : (dValues[0] + dValues[1]  * 256 + dValues[2]  * 65536) / 100
_rower.distanceInMeters = (dValues.count <  6) ? 0.0 : (dValues[3] + dValues[4]  * 256 + dValues[5]  * 65536) / 10
// etc