commit a89bc612968c8870a1c1c3c3a3358d46f6857e7c
Author: JimZAH <me@james.ac>
Date:   Sat Sep 14 14:05:32 2024 +0100

    init

diff --git a/cw.h b/cw.h
new file mode 100644
index 0000000..a49a3b5
--- /dev/null
+++ b/cw.h
@@ -0,0 +1,44 @@
+#ifndef CW_H
+#define CW_H
+
+int morse[] = {
+  0b00101001, // /
+  0b00111111, // 0
+  0b00111110, // 1
+  0b00111100, // 2
+  0b00111000, // 3
+  0b00110000, // 4
+  0b00100000, // 5
+  0b00100001, // 6
+  0b00100011, // 7
+  0b00100111, // 8
+  0b00101111, // 9
+  0b00000110, // A
+  0b00010001, // B
+  0b00010101, // C
+  0b00001001, // D
+  0b00000010, // E
+  0b00010100, // F
+  0b00001011, // G
+  0b00010000, // H
+  0b00000100, // I
+  0b00011110, // J
+  0b00001101, // K
+  0b00010010, // L
+  0b00000111, // M
+  0b00000101, // N
+  0b00001111, // O
+  0b00010110, // P
+  0b00011011, // Q
+  0b00001010, // R
+  0b00001000, // S
+  0b00000011, // T
+  0b00001100, // U
+  0b00011000, // V
+  0b00001110, // W
+  0b00011001, // X
+  0b00011101, // Y
+  0b00010011, // Z
+};
+
+#endif
diff --git a/cw.ino b/cw.ino
new file mode 100644
index 0000000..2fed1d8
--- /dev/null
+++ b/cw.ino
@@ -0,0 +1,52 @@
+#include "cw.h"
+
+void sendChar(rpt* myrpt, char c) {
+  if (c < 47 || c > 90) {
+    delay(myrpt->cw_speed * 3 * 2);
+    return;
+  }
+
+  if (c > 57 && c < 65) {
+    return;
+  }
+
+  int index = c - 47;
+  if (c >= 65) {
+    index = c - 54;
+  }
+
+  if (index >= sizeof morse/sizeof morse[0])
+    return;
+  
+  int dd = morse[index];
+  
+  for (int i=0; i < 8; i++) {
+      if (dd == 1) {
+        return;
+      }
+      tone(PIP, myrpt->cw_pitch);
+      if (dd&1) {
+        delay(myrpt->cw_speed * 3);
+      } else {
+        delay(myrpt->cw_speed);   
+      }
+      dd >>= 1;
+      noTone(PIP);
+      delay(myrpt->cw_speed);
+  }
+}
+
+void sendID(rpt* myrpt) {
+  myrpt->id = millis();
+  if (myrpt->callsign == NULL) {
+    return;
+  }
+
+  delay(500);
+  
+  for (int i=0; i < sizeof ID/sizeof ID[0]; i++) {
+    sendChar(myrpt, myrpt->callsign[i]);
+    delay(myrpt->cw_speed * 3);
+  }
+  myrpt->is_id = false;
+}
diff --git a/mb5nn.ino b/mb5nn.ino
new file mode 100644
index 0000000..e9d4bef
--- /dev/null
+++ b/mb5nn.ino
@@ -0,0 +1,100 @@
+/* Copywrite M0ZAH - simple morse ID */
+
+/* IO */
+#define IDTIME 10000
+#define COS 0
+#define PTT 1
+#define PIP 3
+
+/* CW ID SETTINGS */
+#define ID "MB5NN"
+#define CW_SPEED 22
+#define CW_PITCH 1000
+
+typedef enum {
+  STBY,
+  HANG,
+  IN_USE,
+  CW,
+}state;
+
+typedef struct {
+  char*         callsign;
+  int           cw_pitch;
+  int           cw_speed;
+  unsigned long id;
+  bool          is_id;
+  state         state;
+}rpt;
+
+rpt *myrpt;
+unsigned long tick;
+
+void setup() {
+  pinMode(COS, INPUT_PULLUP);
+  pinMode(PIP, OUTPUT);
+  pinMode(PTT, OUTPUT);
+  static rpt repeater = {
+      .callsign = ID,
+      .cw_pitch = CW_PITCH,
+      .cw_speed = 1200 / CW_SPEED,
+      .id       = 0,
+      .is_id    = false,
+      .state    = STBY,
+    };
+  myrpt = &repeater;
+}
+
+void loop() {
+  tick = millis();
+
+  switch (myrpt->state) {
+    case STBY:
+    if (!digitalRead(COS)) {
+      digitalWrite(PTT, LOW);
+      myrpt->state = IN_USE;
+    }
+
+    if (!digitalRead(PTT))
+      digitalWrite(PTT, HIGH);
+    break;
+
+    case HANG:
+    delay(250);
+    tone(PIP, 875, 75);
+    
+    unsigned long hang = tick;
+    for(;;) {
+      if (!digitalRead(COS)) {
+        myrpt->state = IN_USE;
+        break;
+      }
+      if (millis() - hang >= 1000) {
+        myrpt->state = STBY;
+        break;
+      }
+    }
+    break;
+
+    case IN_USE:
+    if (digitalRead(COS)) {
+      delay(250);
+      if (!digitalRead(COS))
+        break;
+      myrpt->state = HANG;
+    }
+    break;
+
+    case CW:
+    /* This is not used at this time */
+    break;
+  }
+
+  /* Is it time to ID? */
+  if (tick - myrpt->id > IDTIME) {
+    if (myrpt->state > STBY) {
+      myrpt->is_id = true;
+      sendID(myrpt);
+    }
+  }
+}