From 1ee6040a847d386afc7d7e64945c3a5ff87aa6d7 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Fri, 4 Jun 2021 22:03:16 +0200
Subject: eval-kit: port variable speed VFO from picardy

---
 sw/eval-clock-cw-tx/src/state.rs | 19 +------------------
 sw/eval-clock-cw-tx/src/ui.rs    | 30 ++++++++++++++----------------
 2 files changed, 15 insertions(+), 34 deletions(-)

diff --git a/sw/eval-clock-cw-tx/src/state.rs b/sw/eval-clock-cw-tx/src/state.rs
index 87527bf..44c64d2 100644
--- a/sw/eval-clock-cw-tx/src/state.rs
+++ b/sw/eval-clock-cw-tx/src/state.rs
@@ -13,13 +13,6 @@ pub enum VFOSelection {
     B,
 }
 
-#[derive(Clone)]
-pub enum TuneSpeed {
-    Slow,
-    Mid,
-    Fast
-}
-
 #[derive(PartialEq, Eq, Clone, Copy)]
 pub enum CWMode {
     StraightKey,
@@ -52,7 +45,6 @@ pub struct State {
     pub vfo_b : u32,
     pub vfo_sel : VFOSelection,
     pub mode : Mode,
-    pub tune_speed : TuneSpeed,
     pub sequence_state : SequenceState,
     pub update_disp_counter : u8,
     pub cw_wpm : u32,
@@ -66,10 +58,9 @@ impl State {
             vfo_sel : VFOSelection::A,
             vfo_a : INITIAL_VFO,
             vfo_b : INITIAL_VFO,
-            tune_speed : TuneSpeed::Mid,
             sequence_state : SequenceState::Rx,
             update_disp_counter : 0,
-            cw_wpm : 12,
+            cw_wpm : 14,
         }
     }
 
@@ -97,14 +88,6 @@ impl State {
         }
     }
 
-    pub fn vfo_incr(&self) -> i32 {
-        match self.tune_speed {
-            TuneSpeed::Slow => 10,
-            TuneSpeed::Mid => 200,
-            TuneSpeed::Fast => 1000,
-        }
-    }
-
     pub fn allow_feldhell_keying(&self) -> bool {
         self.sequence_state == SequenceState::Tx(SequenceMode::FeldHell)
     }
diff --git a/sw/eval-clock-cw-tx/src/ui.rs b/sw/eval-clock-cw-tx/src/ui.rs
index 38355e5..809dd8d 100644
--- a/sw/eval-clock-cw-tx/src/ui.rs
+++ b/sw/eval-clock-cw-tx/src/ui.rs
@@ -47,6 +47,8 @@ struct ButtonState {
     pub enc : bool,
 }
 
+const VFO_INCR : i32 = 2;
+
 impl ButtonState {
     fn edge_detection(&self, old_state : &ButtonState) -> ButtonState {
         ButtonState {
@@ -182,11 +184,6 @@ impl UI {
         }
 
         if button_updates.d {
-            state.tune_speed = match state.tune_speed {
-                TuneSpeed::Slow => TuneSpeed::Mid,
-                TuneSpeed::Mid => TuneSpeed::Fast,
-                TuneSpeed::Fast => TuneSpeed::Slow,
-            };
             result.display_update = true;
         }
 
@@ -204,26 +201,33 @@ impl UI {
         result
     }
 
-    pub fn update_encoder(&mut self, state: &mut State, delta : i32) {
+    pub fn update_encoder(&mut self, state: &mut State, counter_delta : i32) {
+
+        let delta = (17 * counter_delta + 3 * (counter_delta * counter_delta * counter_delta))/20;
+
         match state.ui_sel {
             UISelection::VFO => {
                 match state.vfo_sel {
                     VFOSelection::A => {
-                        state.vfo_a = (state.vfo_a as i32 + delta * state.vfo_incr()) as u32;
+                        state.vfo_a = (state.vfo_a as i32 + delta * VFO_INCR) as u32;
                     },
                     VFOSelection::B => {
-                        state.vfo_b = (state.vfo_b as i32 + delta * state.vfo_incr()) as u32;
+                        state.vfo_b = (state.vfo_b as i32 + delta * VFO_INCR) as u32;
                     },
                 }
             },
             UISelection::Mode => {
                 match state.mode {
                     Mode::CW(CWMode::Iambic) => {
-                        let mut new_wpm = state.cw_wpm as i32 + delta / 4;
+                        let mut new_wpm = state.cw_wpm as i32 + counter_delta / 4;
                         if new_wpm < 1 {
                             new_wpm = 1;
                         }
 
+                        if new_wpm > 40 {
+                            new_wpm = 40;
+                        }
+
                         let wpm = new_wpm as u32;
                         state.cw_wpm = wpm;
                         state.mode = Mode::CW(CWMode::Iambic);
@@ -262,13 +266,7 @@ pub fn update_disp<T: hd44780_driver::bus::DataBus>(lcd: &mut HD44780<T>, state:
         Mode::FeldHell => "HEL",
     };
 
-    let speed = match state.tune_speed {
-        TuneSpeed::Slow => "SLO",
-        TuneSpeed::Mid => "MID",
-        TuneSpeed::Fast => "FST",
-    };
-
-    write!(string, "{} {}", mode, speed).unwrap();
+    write!(string, "{}    ", mode).unwrap();
 
     lcd.set_cursor_pos(40, delay).unwrap();
     lcd.write_str(&string, delay).unwrap();
-- 
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