Rtty tx and rx (#2977)

firmware/common/message.hpp

@@ -153,6 +153,7 @@ class Message {
         MorseTXConfigure = 95,
         MorseTXkey = 96,
         StreamTXConfiguration = 97,
+        RTTYData = 98,
         MAX
     };
 
@@ -1770,4 +1771,26 @@ class StreamTXConfigurationMessage : public Message {
     uint8_t mode = 0;            // am = 0, 2fsk = 1
 };
 
+class RTTYDataMessage : public Message {
+   public:
+    constexpr RTTYDataMessage(uint16_t baud = 4545, uint16_t shift = 170, int16_t mark_tone = -85, int16_t space_tone = 85, uint8_t stopbits = 3, bool inverted = false)
+        : Message{ID::RTTYData},
+          baud(baud),
+          shift(shift),
+          mark_tone(mark_tone),
+          space_tone(space_tone),
+          inverted(inverted),
+          stopbits(stopbits) {
+    }
+    uint8_t data[490]{0};      // 5bit data, stored on 8 bits.
+    uint16_t data_len = 0;     // count of data sent
+    uint16_t baud = 4545;      // /100 baud 45.45 = 4545
+    uint16_t shift = 170;      // hz
+    int16_t mark_tone = 0;     // for tx., hz
+    int16_t space_tone = 170;  // hz
+    bool inverted = false;     // for tx, if true, mark and space tones are swapped.
+    uint8_t stopbits = 3;      // doubled value is stored here, so stop 2 = 1 stop bit, 3 = 1.5, 4 = 2.
+    static constexpr uint16_t max_len = 490;
+};
+
 #endif /*__MESSAGE_H__*/

firmware/common/spi_image.hpp

@@ -126,6 +126,8 @@ constexpr image_tag_t image_tag_noaaapt_rx{'P', 'N', 'O', 'A'};
 constexpr image_tag_t image_tag_sstv_rx{'P', 'S', 'R', 'X'};
 constexpr image_tag_t image_tag_morse{'P', 'M', 'R', 'S'};
 constexpr image_tag_t image_tag_morsetx{'P', 'M', 'R', 'T'};
+constexpr image_tag_t image_tag_rttyrx{'P', 'R', 'T', 'R'};
+constexpr image_tag_t image_tag_rttytx{'P', 'R', 'T', 'T'};
 
 constexpr image_tag_t image_tag_noop{'P', 'N', 'O', 'P'};