dshot: fix scaling (#25001)

dakejahl · AlexKlimaj · commit e3fecd96d59c · 2025-07-09T12:19:24.000-06:00
diff --git a/platforms/nuttx/src/px4/stm/stm32_common/dshot/dshot.c b/platforms/nuttx/src/px4/stm/stm32_common/dshot/dshot.c
@@ -553,7 +553,7 @@ void process_capture_results(uint8_t timer_index, uint8_t channel_index)
 
 	} else {
 		// Convert the period to eRPM
-		_erpms[output_channel] = (1000000 * 60) / period;
+		_erpms[output_channel] = (1000000 * 60 / 100 + period / 2) / period;
 	}
 
 	// We set it ready anyway, not to hold up other channels when used in round robin.

Original file line number	Diff line number	Diff line change
`@@ -553,7 +553,7 @@ void process_capture_results(uint8_t timer_index, uint8_t channel_index)`
`553`	`553`
`554`	`554`	`} else {`
`555`	`555`	`// Convert the period to eRPM`
`556`		`- _erpms[output_channel] = (1000000 * 60) / period;`
	`556`	`+ _erpms[output_channel] = (1000000 * 60 / 100 + period / 2) / period;`
`557`	`557`	`}`
`558`	`558`
`559`	`559`	`// We set it ready anyway, not to hold up other channels when used in round robin.`