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Display ESC telemetry as real RPM in the OSD

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The telemetry data provides eRPM/100.  Added a `motor_poles` parameter (defaulting to 14) that is used to calculate the physical RPM.

RPM = (telemetry_rpm * 100) / (motor_poles / 2)

Most motors we commonly use are 14 poles, but the user can adjust if needed for their setup.

Also calculate actual RPM for DEBUG_ESC_SENSOR_RPM, but to fit with in int16 the log value will be RPM/10.
This commit is contained in:
Bruce Luckcuck 2018-04-24 14:38:36 -04:00
parent 49f2308fd6
commit 063f3829d4
5 changed files with 6 additions and 2 deletions
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2
src/main/io/osd.c
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@ -820,7 +820,7 @@ static bool osdDrawSingleElement(uint8_t item)
case OSD_ESC_RPM:
if (feature(FEATURE_ESC_SENSOR)) {
tfp_sprintf(buff, "%5d", escDataCombined == NULL ? 0 : escDataCombined->rpm);
tfp_sprintf(buff, "%5d", escDataCombined == NULL ? 0 : (escDataCombined->rpm * 100) / (motorConfig()->motorPolesCount / 2));
}
break;
#endif