IT'S WORKING!

create_sinus_tables.py

@@ -33,62 +33,76 @@ with open(os.path.join(os.path.dirname(__file__), 'include/afsk_sinus.hpp'), 'w'
 #define N_SHIFTS {N_SHIFTS}
 #define N_SINUS_1200 {len(sinus1200)}
 #define N_SINUS_2200 {len(sinus2200)}
+#define SKEW_ROUNDS {round(abs(1/(int(1000000/BAUD)-1000000/BAUD)))}
 
 const PROGMEM uint8_t SINUS1200[] = {{ {', '.join([str(i) for i in sinus1200])} }};
 const PROGMEM uint8_t SINUS2200[] = {{ {', '.join([str(i) for i in sinus2200])} }};
 const size_t PS1200[] = {{ {', '.join([str(i) for i in phaseShift1200])} }};
 const size_t PS2200[] = {{ {', '.join([str(i) for i in phaseShift2200])} }};
 
+uint8_t timeskew = 0;
+
 void sendOne(uint32_t *us, uint8_t *phaseShift) {{
     uint32_t t;
-    while ((t = micros() - *us) < INV_BAUD) {{
+    while ((t = micros() - *us) < INV_BAUD + (timeskew == 0)) {{
-        OUT_PORT = pgm_read_byte(&SINUS1200[ (PS1200[*phaseShift] + t) % N_SINUS_1200 ]);
+        OUT_PORT = pgm_read_byte(&SINUS1200[ (PS1200[*phaseShift] + t) % N_SINUS_1200 ]) >> 2;
     }}
-    *us += INV_BAUD;
+    *us += INV_BAUD  + (timeskew == 0);
+    timeskew = (timeskew + 1) % SKEW_ROUNDS;
 }}
 
 void sendZero(uint32_t *us, uint8_t *phaseShift) {{
     uint32_t t;
-    while ((t = micros() - *us) < INV_BAUD) {{
+    while ((t = micros() - *us) < INV_BAUD + (timeskew == 0)) {{
-        OUT_PORT = pgm_read_byte(&SINUS2200[ (PS2200[*phaseShift] + t) % N_SINUS_2200 ]);
+        OUT_PORT = pgm_read_byte(&SINUS2200[ (PS2200[*phaseShift] + t) % N_SINUS_2200 ]) >> 2;
     }}
     *phaseShift = (*phaseShift + 1) % N_SHIFTS;
-    *us += INV_BAUD;
+    *us += INV_BAUD + (timeskew == 0);
+    timeskew = (timeskew + 1) % SKEW_ROUNDS;
 }}
 
 void setZero() {{
-  OUT_PORT = pgm_read_byte(&SINUS2200[0]);
+  OUT_PORT = pgm_read_byte(&SINUS2200[0]) >> 2;
 }}
 
 ''')
 
 
-#from matplotlib import pyplot as plt
+# from matplotlib import pyplot as plt
 # 
-#phase_shift = 0
+# phase_shift = 0
+# time_skew = 0
 # 
-#signal = []
+# signal = []
+# skew_corrected_signal = []
 # 
 # 
-#def one():
+# def one():
-#    global phase_shift
+#     global phase_shift, time_skew
-#    for i in range(int(1000000/BAUD)):
+#     for i in range(int(1000000/BAUD)):
-#        signal.append(sinus1200[int((phaseShift1200[phase_shift]+i) % len(sinus1200))])
+#         signal.append(sinus1200[int((phaseShift1200[phase_shift]+i) % len(sinus1200))])
+#     for i in range(int(1000000/BAUD)+(time_skew == 0)):
+#         skew_corrected_signal.append(sinus1200[int((phaseShift1200[phase_shift]+i) % len(sinus1200))])
+#     time_skew = (time_skew + 1) % 3
 # 
-#def zero():
+# def zero():
-#    global phase_shift
+#     global phase_shift, time_skew
-#    for i in range(int(1000000/BAUD)):
+#     for i in range(int(1000000/BAUD)):
-#        signal.append(sinus2200[int((phaseShift2200[phase_shift]+i) % len(sinus2200))])
+#         signal.append(sinus2200[int((phaseShift2200[phase_shift]+i) % len(sinus2200))])
-#    phase_shift = (phase_shift + 1) % len(phaseShift2200)
+#     for i in range(int(1000000/BAUD)+(time_skew == 0)):
+#         skew_corrected_signal.append(sinus2200[int((phaseShift2200[phase_shift]+i) % len(sinus2200))])
+#     phase_shift = (phase_shift + 1) % len(phaseShift2200)
+#     time_skew = (time_skew + 1) % 3
 # 
 # 
-#for i in range(20):
+# for i in range(200):
-#    if i % 3 == 0:
+#     if i % 3 == 0:
-#        one()
+#         one()
-#    else:
+#     else:
-#        zero()
+#         zero()
 # 
 # 
-#plt.plot(signal)
+# plt.plot(signal, color='blue')
-#plt.vlines([i*int(1000000/BAUD) for i in range(21)], ymin=0, ymax=255, color='red')
+# plt.plot(skew_corrected_signal, color='purple')
-#plt.show()
+# plt.vlines([i*int(1000000/BAUD) for i in range(21)], ymin=0, ymax=255, color='red')
+# plt.show()

include/afsk_sinus.hpp

@@ -8,30 +8,35 @@
 #define N_SHIFTS 6
 #define N_SINUS_1200 833
 #define N_SINUS_2200 454
+#define SKEW_ROUNDS 3
 
 const PROGMEM uint8_t SINUS1200[] = { 128, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 176, 177, 178, 179, 180, 181, 182, 183, 183, 184, 185, 186, 187, 188, 189, 189, 190, 191, 192, 193, 194, 194, 195, 196, 197, 198, 199, 199, 200, 201, 202, 202, 203, 204, 205, 206, 206, 207, 208, 209, 209, 210, 211, 212, 212, 213, 214, 214, 215, 216, 217, 217, 218, 219, 219, 220, 221, 221, 222, 223, 223, 224, 224, 225, 226, 226, 227, 228, 228, 229, 229, 230, 230, 231, 232, 232, 233, 233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, 239, 240, 240, 241, 241, 242, 242, 242, 243, 243, 244, 244, 245, 245, 245, 246, 246, 246, 247, 247, 247, 248, 248, 248, 249, 249, 249, 250, 250, 250, 250, 251, 251, 251, 251, 252, 252, 252, 252, 253, 253, 253, 253, 253, 254, 254, 254, 254, 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 254, 254, 254, 254, 254, 254, 253, 253, 253, 253, 253, 253, 252, 252, 252, 252, 251, 251, 251, 251, 250, 250, 250, 250, 249, 249, 249, 248, 248, 248, 247, 247, 247, 246, 246, 246, 245, 245, 244, 244, 244, 243, 243, 242, 242, 241, 241, 241, 240, 240, 239, 239, 238, 238, 237, 237, 236, 236, 235, 235, 234, 234, 233, 233, 232, 231, 231, 230, 230, 229, 229, 228, 227, 227, 226, 226, 225, 224, 224, 223, 222, 222, 221, 220, 220, 219, 218, 218, 217, 216, 216, 215, 214, 213, 213, 212, 211, 211, 210, 209, 208, 208, 207, 206, 205, 205, 204, 203, 202, 201, 201, 200, 199, 198, 197, 197, 196, 195, 194, 193, 193, 192, 191, 190, 189, 188, 187, 187, 186, 185, 184, 183, 182, 181, 181, 180, 179, 178, 177, 176, 175, 174, 173, 173, 172, 171, 170, 169, 168, 167, 166, 165, 164, 163, 162, 162, 161, 160, 159, 158, 157, 156, 155, 154, 153, 152, 151, 150, 149, 148, 147, 146, 145, 144, 144, 143, 142, 141, 140, 139, 138, 137, 136, 135, 134, 133, 132, 131, 130, 129, 128, 127, 126, 125, 124, 123, 122, 121, 120, 119, 118, 118, 117, 116, 115, 114, 113, 112, 111, 110, 109, 108, 107, 106, 105, 104, 103, 102, 101, 100, 99, 98, 98, 97, 96, 95, 94, 93, 92, 91, 90, 89, 88, 87, 86, 86, 85, 84, 83, 82, 81, 80, 79, 78, 77, 77, 76, 75, 74, 73, 72, 71, 70, 70, 69, 68, 67, 66, 65, 64, 64, 63, 62, 61, 60, 59, 59, 58, 57, 56, 55, 55, 54, 53, 52, 51, 51, 50, 49, 48, 48, 47, 46, 45, 45, 44, 43, 42, 42, 41, 40, 40, 39, 38, 38, 37, 36, 36, 35, 34, 34, 33, 32, 32, 31, 30, 30, 29, 28, 28, 27, 27, 26, 25, 25, 24, 24, 23, 23, 22, 22, 21, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 15, 15, 15, 14, 14, 13, 13, 12, 12, 12, 11, 11, 10, 10, 10, 9, 9, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 10, 10, 10, 11, 11, 12, 12, 12, 13, 13, 14, 14, 15, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 27, 27, 28, 28, 29, 30, 30, 31, 32, 32, 33, 34, 34, 35, 36, 36, 37, 38, 38, 39, 40, 40, 41, 42, 42, 43, 44, 45, 45, 46, 47, 48, 48, 49, 50, 51, 51, 52, 53, 54, 55, 55, 56, 57, 58, 59, 59, 60, 61, 62, 63, 64, 64, 65, 66, 67, 68, 69, 70, 70, 71, 72, 73, 74, 75, 76, 77, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 118, 119, 120, 121, 122, 123, 124, 125, 126 };
 const PROGMEM uint8_t SINUS2200[] = { 128, 129, 131, 133, 135, 136, 138, 140, 142, 143, 145, 147, 149, 150, 152, 154, 156, 157, 159, 161, 162, 164, 166, 168, 169, 171, 173, 174, 176, 177, 179, 181, 182, 184, 185, 187, 189, 190, 192, 193, 195, 196, 198, 199, 201, 202, 204, 205, 206, 208, 209, 210, 212, 213, 214, 216, 217, 218, 219, 221, 222, 223, 224, 225, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 239, 240, 241, 242, 243, 243, 244, 245, 246, 246, 247, 248, 248, 249, 249, 250, 250, 251, 251, 252, 252, 253, 253, 253, 254, 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 254, 254, 254, 253, 253, 253, 252, 252, 251, 251, 250, 250, 249, 249, 248, 248, 247, 246, 246, 245, 244, 244, 243, 242, 241, 241, 240, 239, 238, 237, 236, 235, 234, 233, 232, 231, 230, 229, 228, 227, 226, 225, 223, 222, 221, 220, 219, 217, 216, 215, 213, 212, 211, 209, 208, 207, 205, 204, 202, 201, 200, 198, 197, 195, 194, 192, 191, 189, 187, 186, 184, 183, 181, 180, 178, 176, 175, 173, 171, 170, 168, 166, 165, 163, 161, 159, 158, 156, 154, 153, 151, 149, 147, 146, 144, 142, 140, 139, 137, 135, 133, 132, 130, 128, 126, 124, 123, 121, 119, 117, 116, 114, 112, 110, 109, 107, 105, 103, 102, 100, 98, 96, 95, 93, 91, 90, 88, 86, 85, 83, 81, 80, 78, 76, 75, 73, 72, 70, 68, 67, 65, 64, 62, 61, 59, 58, 56, 55, 53, 52, 50, 49, 48, 46, 45, 44, 42, 41, 40, 38, 37, 36, 35, 33, 32, 31, 30, 29, 28, 27, 25, 24, 23, 22, 21, 20, 19, 18, 18, 17, 16, 15, 14, 13, 13, 12, 11, 10, 10, 9, 8, 8, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 5, 5, 6, 7, 7, 8, 8, 9, 10, 10, 11, 12, 13, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 35, 36, 37, 39, 40, 41, 42, 44, 45, 47, 48, 49, 51, 52, 54, 55, 56, 58, 59, 61, 62, 64, 66, 67, 69, 70, 72, 73, 75, 77, 78, 80, 82, 83, 85, 87, 88, 90, 92, 93, 95, 97, 98, 100, 102, 104, 105, 107, 109, 111, 112, 114, 116, 118, 119, 121, 123, 125 };
 const size_t PS1200[] = { 0, 694, 555, 416, 277, 138 };
 const size_t PS2200[] = { 0, 378, 303, 227, 151, 75 };
 
+uint8_t timeskew = 0;
+
 void sendOne(uint32_t *us, uint8_t *phaseShift) {
     uint32_t t;
-    while ((t = micros() - *us) < INV_BAUD) {
+    while ((t = micros() - *us) < INV_BAUD + (timeskew == 0)) {
-        OUT_PORT = pgm_read_byte(&SINUS1200[ (PS1200[*phaseShift] + t) % N_SINUS_1200 ]);
+        OUT_PORT = pgm_read_byte(&SINUS1200[ (PS1200[*phaseShift] + t) % N_SINUS_1200 ]) >> 2;
     }
-    *us += INV_BAUD;
+    *us += INV_BAUD  + (timeskew == 0);
+    timeskew = (timeskew + 1) % SKEW_ROUNDS;
 }
 
 void sendZero(uint32_t *us, uint8_t *phaseShift) {
     uint32_t t;
-    while ((t = micros() - *us) < INV_BAUD) {
+    while ((t = micros() - *us) < INV_BAUD + (timeskew == 0)) {
-        OUT_PORT = pgm_read_byte(&SINUS2200[ (PS2200[*phaseShift] + t) % N_SINUS_2200 ]);
+      OUT_PORT = pgm_read_byte(&SINUS2200[ (PS2200[*phaseShift] + t) % N_SINUS_2200 ]) >> 2;
     }
     *phaseShift = (*phaseShift + 1) % N_SHIFTS;
-    *us += INV_BAUD;
+    *us += INV_BAUD + (timeskew == 0);
+    timeskew = (timeskew + 1) % SKEW_ROUNDS;
 }
 
 void setZero() {
-  OUT_PORT = pgm_read_byte(&SINUS2200[0]);
+  OUT_PORT = pgm_read_byte(&SINUS2200[0]) >> 2;
 }
 

platformio.ini

@@ -12,4 +12,34 @@
 platform = atmelavr
 board = uno
 framework = arduino
-build_flags = -DOUT_PORT=PORTD -DOUT_DDR=DDRD
+build_flags = -DOUT_PORT=PORTC -DOUT_DDR=DDRC
+
+[env:mega]
+platform = atmelavr
+board = megaatmega2560
+framework = arduino
+build_flags = -DOUT_PORT=PORTF -DOUT_DDR=DDRF
+
+[env:nano]
+platform = atmelavr
+board = nanoatmega328
+framework = arduino
+build_flags = -DOUT_PORT=PORTC -DOUT_DDR=DDRC
+
+[env:one]
+platform = atmelavr
+board = uno
+framework = arduino
+build_flags = -DOUT_PORT=PORTD -DOUT_DDR=DDRD -DONE
+
+[env:zero]
+platform = atmelavr
+board = uno
+framework = arduino
+build_flags = -DOUT_PORT=PORTD -DOUT_DDR=DDRD -DZERO
+
+[env:alternate]
+platform = atmelavr
+board = megaatmega2560
+framework = arduino
+build_flags = -DOUT_PORT=PORTF -DOUT_DDR=DDRF -DALT

src/main.cpp

@@ -4,30 +4,15 @@
 
 #include "afsk_sinus.hpp"
 
-#define NCOMMENT 0
 #define CALLSIGN "HB3YBQ"
-
+#define DESTINATION "GPS   "
-
+#define TXDELAY 32
-uint8_t txdelay[32];
 
 struct ax25 {
-  uint8_t sflag;
   uint8_t daddr[7];
   uint8_t saddr[7];
   uint8_t ctrl;
   uint8_t proto;
-  struct {
-    uint8_t dtid;
-    uint8_t type;
-    char time[7];
-    char lat[8];
-    uint8_t sym_table_id;
-    char lon[9];
-    uint8_t sym_code;
-    char comment[NCOMMENT];
-  } __attribute__((packed)) aprs;
-  uint16_t fcs;
-  uint8_t eflag;
 } __attribute__((packed)) frame;
 
 enum AprsSymbol : uint8_t {
@@ -57,66 +42,166 @@ extern void setZero();
 uint32_t m = 0;
 uint8_t phaseShift = 0;
 bool nrzi = true;
+uint8_t oneCount = 0;
 
-void sendBell202(uint8_t byt, bool sync) {
+void sendNrziBit(bool bit, bool zeroStuff) {
+  if (!bit) {
+    nrzi = !nrzi;
+    oneCount = 0;
+  } else if (zeroStuff) {
+    oneCount++;
+  }
+  if (nrzi) {
+    sendOne(&m, &phaseShift);
+  } else {
+    sendZero(&m, &phaseShift);
+  }
+  if (oneCount >= 5) {
+    sendNrziBit(0, true);
+  }
+}
+
+void sendFlag(bool sync, size_t count) {
   if (sync) {
     phaseShift = 0;
     m = micros();
   }
-  for (uint8_t i = 0; i < 8; ++i) {
+  uint8_t flag = 0x7e;
-    if (!((byt >> i) & 1)) {
+  for (size_t n = 0; n < count; ++n) {
-      nrzi = !nrzi;
+    for (uint8_t i = 0; i < 8; ++i) {
-    }
+      sendNrziBit((flag >> i) & 1, false);
-    if (nrzi) {
-      sendOne(&m, &phaseShift);
-    } else {
-      sendZero(&m, &phaseShift);
     }
   }
 }
 
+void sendAbort(bool sync) {
+  if (sync) {
+    phaseShift = 0;
+    m = micros();
+  }
+  for (uint8_t i = 0; i < 16; ++i) {
+    sendNrziBit(1, false);
+  }
+}
+
 void sendBell202buf(uint8_t *buf, size_t len, bool sync) {
-  for (size_t i = 0; i < len; ++i) {
+  if (sync) {
-    sendBell202(buf[i], sync);
+    phaseShift = 0;
-    sync = false;
+    m = micros();
+  }
+  for (size_t n = 0; n < len; ++n) {
+    for (uint8_t i = 0; i < 8; ++i) {
+      sendNrziBit((buf[n] >> i) & 1, true);
+    }
   }
 }
 
 void initFrame() {
-  memset(txdelay, 0x7e, sizeof(txdelay));
   memset(&frame, 0, sizeof(frame));
-  frame.sflag = 0x7e;
+  memcpy(&frame.daddr, DESTINATION, 6);
-  memcpy(&frame.daddr, "GPS\x00\x00\x00\x00", 7);
   memcpy(&frame.saddr, CALLSIGN, 6);
+  for (uint8_t i = 0; i < 7; ++i) {
+    frame.daddr[i] <<=1;
+    frame.saddr[i] <<=1;
+  }
+  frame.daddr[6] = (NONE << 1) | 0xe0; // command bit + reserved bits (AX.25 3.12.2)
+  frame.saddr[6] = (BICYCLE << 1) | 0xe1;  // command bit + reserved bits + end bit
   frame.ctrl = 0x03;
   frame.proto = 0xf0;
-  frame.aprs.dtid = 1;
-  memcpy(&frame.aprs.time, "151430h", 7);
-  memcpy(&frame.aprs.lat, "4730.00N", 8);
-  frame.aprs.sym_table_id = '/';
-  memcpy(&frame.aprs.lon, "00730.00E", 9);
-  frame.aprs.sym_code = BICYCLE;
-  frame.fcs = 0xffff;
-  for (size_t i = 0; i < sizeof(frame) - 3; ++i) {
-    frame.fcs = _crc_xmodem_update(frame.fcs, ((uint8_t*) &frame)[i]);
-  }
-  frame.eflag = 0x7e;
 }
 
 
+uint8_t mirrorByte(uint8_t byt) {
+  return ((byt & 1) << 7) | ((byt & 2) << 5) | ((byt & 4) << 3) | ((byt & 8) << 1)
+    | ((byt & 16) >> 1) | ((byt & 32) >> 3) | ((byt & 64) >> 5) | ((byt & 128) >> 7);
+}
+
 void setup() {
-  OUT_DDR = 0xff;
+  OUT_DDR = 0x3f;
   setZero();
+  nrzi = true;
   initFrame();
+  Serial.begin(9600);
+#ifdef ALT
+  phaseShift = 0;
+  m = micros();
+  while (true) {
+    sendOne(&m, &phaseShift);
+    sendZero(&m, &phaseShift);
+  }
+#endif
+#ifdef ONE
+  phaseShift = 0;
+  m = micros();
+  while (true) {
+    sendOne(&m, &phaseShift);
+  }
+#endif
+#ifdef ZERO
+  phaseShift = 0;
+  m = micros();
+  while (true) {
+    sendZero(&m, &phaseShift);
+  }
+#endif
+}
+
+
+void readNmeaGll() {
+  uint8_t state = 0;
+  char str[83];
+  char *sptr;
+
+  while (state != 2) {
+    if (!Serial.available()) {
+      continue;
+    }
+    int16_t byt = Serial.read();
+    if (state == 0) {
+      if (byt == '$') {
+	state = 1;
+	sptr = str;
+	*(sptr++) = (char) byt;
+      }
+    } else if (state == 1) {
+      *(sptr++) = (char) byt;
+      if (byt == '\n') {
+	state = 2;
+	*sptr = 0;
+	if (str[3] == 'G' && str[4] == 'L' && str[5] == 'L') {
+	  state = 2;
+	} else {
+	  state = 0;
+	}
+	Serial.print(str);
+	Serial.flush();
+      }
+    }
+    if (sptr > str + sizeof(str)) {
+      state = 0;
+    }
+  }
+  // AX.25 3.8 - FCS is sent MSB first
+  uint16_t fcs = 0xffff;
+  for (size_t i = 0; i < sizeof(frame); ++i) {
+    fcs = _crc_xmodem_update(fcs, mirrorByte(((uint8_t*) &frame)[i]));
+  }
+  for (char *c = str; c < sptr; ++c) {
+    fcs = _crc_xmodem_update(fcs, mirrorByte(*c));
+  }  
+  fcs ^= 0xffff;
+  fcs = (mirrorByte(fcs & 0xff) << 8) | mirrorByte(fcs >> 8);
+  sendFlag(true, TXDELAY+1);
+  sendBell202buf((uint8_t*) &frame, sizeof(frame), false);
+  sendBell202buf((uint8_t*) str, sptr-str, false);
+  sendBell202buf((uint8_t*) &fcs, 2, false);
+  sendFlag(false, 1);
+  setZero();
   nrzi = true;
 }
 
+
 void loop() {
-  sendBell202buf(txdelay, sizeof(txdelay), true);
+  readNmeaGll();
-  //sendBell202buf((uint8_t*) &frame, sizeof(frame) - 1, false);
-  //sendBell202buf((uint8_t*) &frame, sizeof(frame) - 1, false);
-  sendBell202buf((uint8_t*) &frame, sizeof(frame), false);
-  setZero();
-  nrzi = true;
   delay(10000);
 }