From: Lukáš Jiřiště <jiriste@icpf.cas.cz>
Date: Wed, 23 Oct 2024 08:53:24 +0000 (+0200)
Subject: Switch from double to float
X-Git-Url: https://git.ljiriste.work/?a=commitdiff_plain;h=14da9d8ea61a7f26b56a76b16f511d0af6320934;p=Servomatic.git

Switch from double to float

Float has 24bit significant so it has plenty of precision for the 10bit
AD conversion and should take less space.
---

diff --git a/PressureSensor.h b/PressureSensor.h
index 1a849ae..b3347f9 100644
--- a/PressureSensor.h
+++ b/PressureSensor.h
@@ -8,7 +8,7 @@ class PressureSensor
 
 		const pin	m_analog_pin;
 
-		static double	signal_to_pressure(int ad_signal);
+		static float	signal_to_pressure(int ad_signal);
 
 	public:
 		PressureSensor() = delete;
@@ -18,7 +18,7 @@ class PressureSensor
 
 		PressureSensor	&operator=(const PressureSensor &other) = delete;
 
-		double	get_pressure();
+		float	get_pressure();
 };
 
 #endif // PRESSURESENSOR_H
diff --git a/PressureSensor.ino b/PressureSensor.ino
index eae698e..a645a3c 100644
--- a/PressureSensor.ino
+++ b/PressureSensor.ino
@@ -17,12 +17,12 @@ PressureSensor::~PressureSensor()
 // of 0 V to 5 V.
 // Hence signal = (2^10 - 1) / (5 V) * U = 1023 / 5 * (0.96 + 0.384 * p/bar)
 // And p/bar = 1 / 0.384 * (5 / (2^10 - 1) * signal - 0.96)
-double	PressureSensor::signal_to_pressure(int ad_signal)
+float	PressureSensor::signal_to_pressure(int ad_signal)
 {
-	return (((static_cast<double>(ad_signal) * 5) / (2 << 10 - 1) - 0.96) / 0.384);
+	return (((static_cast<float>(ad_signal) * 5) / (2 << 10 - 1) - 0.96) / 0.384);
 }
 
-double	PressureSensor::get_pressure()
+float	PressureSensor::get_pressure()
 {
 	return (signal_to_pressure(analogRead(m_analog_pin)));
 }