first attempt implementing iambic b

src/keyer.cpp

@@ -9,7 +9,6 @@ extern const uint LED_PIN;
 extern const uint LEFT_PADDLE_PIN;
 extern const uint RIGHT_PADDLE_PIN;
 
-
 const uint SIDETONE_FREQ = 622;
 
 bool left_paddle_pressed()
@@ -36,7 +35,7 @@ uint64_t calcElementDurationUs(uint8_t wpm)
     return duration;
 }
 
-Keyer::Keyer(uint8_t wpm) : m_wpm(wpm)
+Keyer::Keyer(uint8_t wpm, Mode mode) : m_wpm(wpm), m_mode(mode)
 {
     m_elementDuration = calcElementDurationUs(m_wpm);
 }
@@ -50,9 +49,12 @@ void Keyer::run()
     case State::Wait:
         if (left_paddle_pressed() && right_paddle_pressed())
         {
-            if (m_lastSymbolWas == Symbol::Dit) {
+            if (m_lastSymbolWas == Symbol::Dit)
+            {
                 state = State::Dah;
-            } else if (m_lastSymbolWas == Symbol::Dah) {
+            }
+            else if (m_lastSymbolWas == Symbol::Dah)
+            {
                 state = State::Dit;
             }
             break;
@@ -77,6 +79,9 @@ void Keyer::run()
         }
         else
         {
+            if (right_paddle_pressed() && !m_keyNextIambicB)
+                m_keyNextIambicB = true;
+
             if (absolute_time_diff_us(timestamp, m_keying_until) <= 0)
             {
                 m_currentlyKeying = false;
@@ -98,6 +103,9 @@ void Keyer::run()
         }
         else
         {
+            if (left_paddle_pressed() && !m_keyNextIambicB)
+                m_keyNextIambicB = true;
+
             if (absolute_time_diff_us(timestamp, m_keying_until) <= 0)
             {
                 m_currentlyKeying = false;
@@ -109,14 +117,27 @@ void Keyer::run()
         }
         break;
     case State::InterCharSpace:
-        if (m_previousState != State::InterCharSpace)
+        if (!m_currentlyPausing)
         {
             m_pausing_until = make_timeout_time_us(m_elementDuration);
-            m_previousState = State::InterCharSpace;
+            m_currentlyPausing = true;
         }
 
         if (absolute_time_diff_us(timestamp, m_pausing_until) <= 0)
         {
+            m_currentlyPausing = false;
+
+            if (m_mode == Mode::IAMBIC_B && m_keyNextIambicB)
+            {
+                if (m_previousState == State::Dit)
+                    state = State::Dah;
+                else
+                    state = State::Dit;
+
+                m_keyNextIambicB = false;
+                break;
+            }
+
             state = State::Wait;
         }
 

src/keyer.h

@@ -2,6 +2,7 @@
 #define KEYER_H
 
 #include "sidetone.h"
+#include "settings.h"
 
 extern const uint BUZZER_PIN;
 
@@ -16,7 +17,7 @@ public:
         InterCharSpace,
         // TODO: perhaps new state: Keying
     };
-    Keyer(uint8_t wpm);
+    Keyer(uint8_t wpm, Mode mode);
 
     void run();
 
@@ -30,12 +31,15 @@ private:
     State state{State::Wait};
     State m_previousState{State::Wait};
     uint8_t m_wpm{18};
+    Mode m_mode{Mode::IAMBIC_B};
     uint64_t m_elementDuration{0};
     bool m_currentlyKeying{false};
+    bool m_currentlyPausing{false};
     absolute_time_t m_keying_until{0};
     absolute_time_t m_pausing_until{0};
     Symbol m_lastSymbolWas{Symbol::Dit};
     Sidetone m_Sidetone{BUZZER_PIN};
+    bool m_keyNextIambicB{false};
 };
 
 #endif

src/raspi_keyer.cpp

@@ -47,7 +47,7 @@ int main()
     // printf("Element duration (u_sec): %" PRIu64 "\n", element_duration_us(settings.wpm));
     printf("\n");
 
-    Keyer keyer(25);
+    Keyer keyer(settings.wpm, settings.mode);
 
     while (true)
     {