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Native ANT+ Part 2 - Improved Power Support

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Fix SRM power decoding to stop requiring a new message
pair whenever a zero change occurs - this was erroneous
and severely limited the update rate. Power and Cadence
updates for SRM are now immediate.

Desk check of support for Standard Power messages showed
that the code was interfering with normal cranktorque or
wheeltorque power calculations. This did not show up with
SRM cranks since they do not send standard power messages.

This should help to resolve issues with erratic/incorrect
power readings from Powertaps. I am not sure if Quarq cranks
send standard power messages, but if they do then this should
improve power readings for those too.
This commit is contained in:
Mark Liversedge
2011-03-10 14:26:12 +00:00
parent 10819d05fa
commit 3cfbfd446a
4 changed files with 28 additions and 19 deletions
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8
src/ANTMessage.cpp
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@@ -406,9 +406,10 @@ qDebug()<<"broadcast data, channel="<<message[3]<<"type="<<message[4]<<"calid?"<
case ANT_STANDARD_POWER: // 0x10 - standard power
eventCount = message[5];
instantCadence = message[6];
sumPower = message[7] + (message[8]<<8);
instantPower = message[9] + (message[10]<<8);
pedalPower = message[6]; // left/right 0xFF = not used
instantCadence = message[7];
sumPower = message[8] + (message[9]<<8);
instantPower = message[10] + (message[11]<<8);
break;
case ANT_WHEELTORQUE_POWER: // 0x11 - wheel torque (Powertap)
@@ -593,6 +594,7 @@ void ANTMessage::init()
wheelRevolutions = crankRevolutions = 0;
slope = period = torque = 0;
sync = length = type = 0;
pedalPower = 0;
srmOffset = srmSlope = srmSerial = 0;
calibrationID = ctfID = 0;
autoZeroStatus = autoZeroEnable = 0;