From 2240e0b6683bcb69b1f477f4449de9cc17314ccd Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Sat, 25 Feb 2023 11:17:03 +0100
Subject: Create dart-70 firmware

---
 sw/dart-70/src/state.rs | 129 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 sw/dart-70/src/state.rs

(limited to 'sw/dart-70/src/state.rs')

diff --git a/sw/dart-70/src/state.rs b/sw/dart-70/src/state.rs
new file mode 100644
index 0000000..08826e7
--- /dev/null
+++ b/sw/dart-70/src/state.rs
@@ -0,0 +1,129 @@
+pub const VHF_BAND_EDGE : u32 = 144_000_000;
+pub const VHF_INITIAL_VFO : u32 = 144_300_000;
+pub const VHF_LO : u32 = 114_284_800;
+pub const BFO_LSB : u32 = 6_000_700 + 1_100;
+pub const BFO_USB : u32 = 6_000_700 - 1_100;
+pub const BFO_CW : u32 = 6_000_700 - 1_100;
+
+// Defines which parameter is changed by the encoder
+#[derive(Clone, Copy, PartialEq, Eq)]
+pub enum UISelection {
+    VFO,
+    RIT,
+    Mode,
+}
+
+#[derive(Clone, Copy, PartialEq, Eq)]
+pub enum MenuPage {
+    One,
+    Two,
+}
+
+#[derive(Clone, Copy)]
+pub enum VFOSelection {
+    A,
+    B,
+}
+
+#[derive(PartialEq, Eq, Clone, Copy)]
+pub enum CWMode {
+    StraightKey,
+    Iambic,
+}
+
+#[derive(PartialEq, Eq, Clone, Copy)]
+pub enum Mode {
+    LSB,
+    USB,
+    CustomShift(u32),
+    CW(CWMode),
+}
+
+#[derive(Clone, PartialEq, Eq)]
+pub enum SequenceState {
+    Rx,
+    MutingSpkr,
+    SwitchingSSB,
+    TxSSB,
+    SwitchingCW,
+    TxCW,
+}
+
+impl SequenceState {
+    fn apply_rit(&self) -> bool {
+        *self == SequenceState::Rx
+    }
+}
+
+#[derive(Clone)]
+pub struct State {
+    pub menu_page : MenuPage,
+    pub ui_sel : UISelection,
+    pub vfo_a : u32,
+    pub vfo_b : u32,
+    pub vfo_sel : VFOSelection,
+    pub rit : i32,
+    pub mode : Mode,
+    pub send_tone : bool,
+    pub sequence_state : SequenceState,
+    pub update_disp_counter : u8,
+    pub cw_wpm : u32,
+}
+
+impl State {
+    pub fn new() -> Self {
+        State {
+            menu_page : MenuPage::One,
+            ui_sel : UISelection::VFO,
+            vfo_a : VHF_INITIAL_VFO,
+            vfo_b : VHF_INITIAL_VFO,
+            vfo_sel : VFOSelection::A,
+            rit : 0,
+            mode : Mode::USB,
+            send_tone : false,
+            sequence_state : SequenceState::Rx,
+            update_disp_counter : 0,
+            cw_wpm : 14,
+        }
+    }
+
+    pub fn bfo(&self) -> u32 {
+        if self.send_tone {
+            0
+        }
+        else {
+            match self.mode {
+                Mode::LSB => BFO_LSB,
+                Mode::USB => BFO_USB,
+                Mode::CustomShift(fs) => fs,
+                Mode::CW(_) => match self.sequence_state {
+                    SequenceState::SwitchingCW | SequenceState::TxCW => 0,
+                    _ => BFO_CW,
+                },
+            }
+        }
+    }
+
+    pub fn vhf_qrg(&self) -> u32 {
+        match self.vfo_sel {
+            VFOSelection::A => self.vfo_a,
+            VFOSelection::B => self.vfo_b,
+        }
+    }
+
+    pub fn if_qrg(&self) -> u32 {
+        self.vhf_qrg() - VHF_LO
+    }
+
+    pub fn vfo(&self) -> u32 {
+        let cw_offset = match self.sequence_state {
+            SequenceState::SwitchingCW | SequenceState::TxCW => 500,
+            _ => 0,
+        };
+
+        let vfo = (self.if_qrg() - self.bfo()) as i32 +
+            if self.sequence_state.apply_rit() { self.rit } else { 0 } +
+                cw_offset;
+        vfo as u32
+    }
+}
-- 
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