From 2e51aeea4c14d473c82432f78b1537163e567354 Mon Sep 17 00:00:00 2001
From: Chris Tacke <ctacke@opennetcf.com>
Date: Thu, 20 Jun 2024 11:49:05 -0500
Subject: [PATCH] update F7 for PWM updates

---
 source/Meadow.Core/Hardware/SoftPwmPort.cs    |  8 +++----
 .../f7/Meadow.F7/Hardware/PwmPort.cs          | 21 +++++++++----------
 2 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/source/Meadow.Core/Hardware/SoftPwmPort.cs b/source/Meadow.Core/Hardware/SoftPwmPort.cs
index 1062cd48..a3de49d1 100644
--- a/source/Meadow.Core/Hardware/SoftPwmPort.cs
+++ b/source/Meadow.Core/Hardware/SoftPwmPort.cs
@@ -23,17 +23,17 @@ public class SoftPwmPort : IPwmPort
     /// </summary>
     public TimeSpan Duration
     {
-        get => TimeSpan.FromSeconds(Period * DutyCycle);
+        get => TimeSpan.FromSeconds(Period.TotalSeconds * DutyCycle);
         set { }
     }
 
     /// <summary>
     /// Period of PWM 
     /// </summary>
-    public double Period
+    public TimeSpan Period
     {
-        get => 1 / (float)frequency.Hertz;
-        set => frequency = new Frequency(1 / value, Units.Frequency.UnitType.Hertz);
+        get => TimeSpan.FromSeconds(1 / frequency.Hertz);
+        set => frequency = new Frequency(1 / value.TotalSeconds, Frequency.UnitType.Hertz);
     }
 
     /// <summary>
diff --git a/source/implementations/f7/Meadow.F7/Hardware/PwmPort.cs b/source/implementations/f7/Meadow.F7/Hardware/PwmPort.cs
index 2408b443..cba7f0fd 100644
--- a/source/implementations/f7/Meadow.F7/Hardware/PwmPort.cs
+++ b/source/implementations/f7/Meadow.F7/Hardware/PwmPort.cs
@@ -13,7 +13,7 @@ public class PwmPort : PwmPortBase
     {
         private bool _isRunning = false;
         private Frequency _frequency;
-        private float _dutyCycle;
+        private double _dutyCycle;
         private bool _inverted;
 
         // dirty dirty hack
@@ -68,7 +68,6 @@ internal static PwmPort From(
                 if (success.Item1)
                 {
                     var port = new PwmPort(pin, ioController, channel, inverted, isOnboard);
-                    port.TimeScale = TimeScale.Seconds;
                     port.Frequency = frequency;
                     port.DutyCycle = dutyCycle;
                     port.Inverted = inverted;
@@ -130,7 +129,7 @@ public override Frequency Frequency
         /// <summary>
         /// The percentage of time the PWM pulse is high (in the range of 0.0 to 1.0)
         /// </summary>
-        public override float DutyCycle
+        public override double DutyCycle
         {
             get => _dutyCycle;
             set
@@ -158,34 +157,34 @@ public override float DutyCycle
         /// <summary>
         /// The amount of time, in seconds, that the a PWM pulse is high.  This will always be less than or equal to the Period
         /// </summary>
-        public override float Duration
+        public override TimeSpan Duration
         {
-            get => DutyCycle * Period;
+            get => TimeSpan.FromSeconds(DutyCycle * Period.TotalSeconds);
             set
             {
                 if (value > Period) throw new ArgumentOutOfRangeException(nameof(Duration), "Duration must be less than or equal to Period");
                 // clamp
-                if (value < 0) { value = 0; }
+                if (value.TotalSeconds < 0) { value = TimeSpan.Zero; }
 
-                DutyCycle = value / Period;
+                DutyCycle = value.TotalSeconds / Period.TotalSeconds;
             }
         }
 
         /// <summary>
         /// The reciprocal of the PWM frequency - in seconds.
         /// </summary>
-        public override float Period
+        public override TimeSpan Period
         {
-            get => 1.0f / (float)Frequency.Hertz * (float)TimeScale;
+            get => TimeSpan.FromSeconds(1.0f / Frequency.Hertz);
             set
             {
-                Frequency = new Frequency(1.0f * (float)TimeScale / value);
+                Frequency = new Frequency(1.0f / value.TotalSeconds);
             }
         }
 
         private void UpdateChannel()
         {
-            UPD.PWM.Start(PwmChannelInfo, (uint)Frequency.Hertz, Inverted ? (1.0f - DutyCycle) : DutyCycle);
+            UPD.PWM.Start(PwmChannelInfo, (uint)Frequency.Hertz, (float)(Inverted ? (1.0f - DutyCycle) : DutyCycle));
         }