Mute APRS RX speaker by default, toggle it with key 1

App/apps/aprsrx/README.md

@@ -11,7 +11,7 @@ Status:
 | Audio path an app can sample | **Done** by EPIRB 406: RX audio on PA4, ADC channel 4 at 9.6 kHz |
 | Integer demodulator, modelled on synthetic audio (`test/model_rx.py`) | **Done** (see below) |
 | Flipper Zero test transmitter (`test/flipper_aprs.py`) | **Done**, files in `test/flipper/` |
-| Radio app (`aprsrx_app.c`) | **v0.1 receives the Flipper frames on the radio**; v0.3 decodes Mic-E (on air: F5RAV via F1PRY-14); v0.4 decodes continuously with 3 slicers (on air: F1PRY-14 via F5KTR-3); v0.5 shows standard positions, the frequency bottom right as Beacon, drops `pp` and the UP/DOWN/5 tuning offset to fit 4 KiB (builds: 3976 B, 120 B free; radio test pending) |
+| Radio app (`aprsrx_app.c`) | **v0.1 receives the Flipper frames on the radio**; v0.3 decodes Mic-E (on air: F5RAV via F1PRY-14); v0.4 decodes continuously with 3 slicers (on air: F1PRY-14 via F5KTR-3); v0.5 shows standard positions, the frequency bottom right as Beacon, drops `pp` and the UP/DOWN/5 tuning offset to fit 4 KiB (3976 B); main-screen frequency, WAIT capsule (4068 B); v0.6: speaker off, key 1 toggles it, per-slicer counters dropped (not built yet) |
 | Bench test with the Flipper on 433.650 MHz | **Done** (2026-09-30, v0.1: `_long` 10/10 in STD; `_badfcs` not shown) |
 | Real station: FT3D beacon on 144.800 MHz | **Done** (2026-09-30, v0.1: Mic-E frame `>TXUPX9` received, FCS good, = 48°50.89' N 2°16.25' E) |
 | Mic-E decoding (`test/mice.py`: spec encoder vs the app's decoder) | **Done** in the model: 6 cases + the FT3D frame |
@@ -21,8 +21,9 @@ Status:
 1. Set the VFO to the APRS frequency, **FM**: 144.800 MHz, or 433.650 MHz for the
    Flipper test files.
 2. Launch **APRS RX**.
-3. Lower the volume: the RX audio must stay on (it is what reaches PA4), so the
+3. The speaker is off (v0.6): the decoder does not need it, only the BK4829 AF
-   speaker plays the channel.
+   output (tested on the radio: PA4 joins the audio before the amplifier). Key 1
+   turns it on to listen to the channel, as FoxHunt's audio key.
 
 Since v0.4 the app decodes **continuously**, as a TNC does: no RSSI trigger,
 the FCS and a UI-frame check (control 0x03, PID 0xF0) sort frames from noise.
@@ -38,17 +39,18 @@ The screen is redrawn after a new frame, a key, or every 5 s.
 
 | Screen | Content |
 |---|---|
-| Status bar | `APRS RX` title, then a `WAIT` capsule until the first frame |
+| Status bar | `APRS RX` title, then a `WAIT` capsule until the first frame, and the speaker icon while the speaker is on |
 | Line 0 | Source call and frame number, e.g. `F4HWN-7 #3` |
 | Tiny row y=8 | `>DEST,DIGI*,...` (as many path entries as fit on one row) |
 | Tiny rows y=13/19/25 | Info field, 3 × 32 characters (non-ASCII shown as `.`); for Mic-E (most Yaesu/Kenwood beacons, v0.3): position `48 50.89N 002 16.25E`, then speed km/h, course, symbol and message type (`Off Duty`, `En Route`...), then altitude and comment without the device markers; for an uncompressed position (`!` `=` `/` `@`, v0.5): position, then the timestamp if any, the symbol (table + code) and the comment over two rows. Compressed positions stay raw text |
 | Lines 4-5 | Under a dotted separator (y=30), the frequency drawn as the main screen draws it (big digits up to the kHz, the last two in the small font), centred; same code as APRS TX |
-| Bottom row y=49 | `ok 12  -89dBm  sl 5/12/7`: frames received, RSSI at the end of the last frame, frames per slicer (space-favouring / neutral / mark-favouring; a frame found by several slicers counts in each, but once in `ok`) |
+| Bottom row y=49 | `ok 12  -89dBm`: frames received, RSSI at the end of the last frame. (v0.4-v0.5 also showed frames per slicer, `sl a/b/c`: on air the outer slicers found frames too; dropped in v0.6 to fit the speaker key) |
 
 Keys (UV-K5 and UV-K1):
 
 | Key | Action |
 |---|---|
+| 1 | Speaker on/off (off at launch); FoxHunt's speaker icon in the status bar while on |
 | MENU | Clear the last frame and the counters |
 | EXIT | Quit |
 
@@ -152,5 +154,4 @@ the standard position display against real frames;
   0.065 LSB/Hz), **measured 734-778** with the Flipper and **916** with a real
   station (F1PRY-14): ~20 % of full scale, plenty of headroom, and the per-tone
   AGC makes the absolute level irrelevant.
-- The per-slicer counters show which decision threshold the stations need: if
+
-  one outer slicer does most of the work, the twist of the path is off-centre.

App/apps/aprsrx/aprsrx_app.c

@@ -33,8 +33,8 @@
  * are served every 50 ms only while no slicer is inside a preamble or a
  * plausible frame; the redraw follows a new frame, a key, or every 5 s.
  *
- * Keys (UV-K5 and UV-K1): MENU clear · EXIT quit. The speaker plays the
+ * Keys (UV-K5 and UV-K1): 1 speaker on/off (off at launch: the decoder does
- *   channel: lower the volume.
+ *   not need it) · MENU clear · EXIT quit.
  * The loader re-runs RADIO_SetupRegisters on exit; the app restores the ADC,
  * PA4, the DAC and its clock itself.
  */
@@ -128,11 +128,10 @@ static struct {
     uint32_t tPrev, tCyc;              /* SysTick cycle counter                   */
     uint32_t tFrame, tDraw;            /* ticks_ms of the last frame, last redraw */
     uint32_t savedSqr3, savedSmpr3, savedModer, savedDac, savedRcc, savedDhr;
-    uint8_t  seq, prevKey, redraw;
+    uint8_t  seq, prevKey, redraw, spk; /* spk: speaker amplifier on (key 1)    */
     bool     running;
     int16_t  rssi;                     /* RSSI at the end of the last frame       */
     uint16_t flen, nOk;                /* frame length, frames                    */
-    uint16_t good[NSL];                /* frames per slicer (duplicates included) */
 } g;
 static char str[34];
 
@@ -164,6 +163,7 @@ static char *puti(char *o,int32_t v){
 static void tiny(uint8_t y,char *end){ *end='\0'; g.A->print_tiny(str,0,y,false,true); }
 
 #define WAIT_CAPS_X 40u    /* "WAIT" capsule in the status bar, after the title */
+#define SPK_X       62u    /* speaker icon (FoxHunt's), after the capsule          */
 
 /* Tiny rows under the source line: the path (capitals and digits: no
  * descenders), then 3 info rows 6 px apart (the 3x5 font is 5 px, 6 with
@@ -334,12 +334,11 @@ static bool slice(sl_t *m,int32_t a,int32_t b){
     return false;
 }
 
-/* ---- a good frame from slicer k: shown unless another slicer just gave it ---- */
+/* ---- a good frame from a slicer: shown unless another slicer just gave it ---- */
-static void accept(sl_t *m,uint8_t k){
+static void accept(sl_t *m){
     const app_api_t *A=g.A;
     uint16_t n=m->n;
     uint32_t t=A->ticks_ms();
-    if(g.good[k]<COUNT_MAX) g.good[k]++;
     if(!(n==g.flen && g.frm[n-1]==m->buf[n-1] && g.frm[n-2]==m->buf[n-2]
          && t-g.tFrame<DUP_MS)){
         memcpy(g.frm,m->buf,n);
@@ -484,6 +483,7 @@ static void draw(void){
     A->status_clear();
     A->print_inverse(s+T_TITLE,2,0,true,true,(uint8_t)(2u+T_TITLE_CHARS*4u));
     A->draw_battery();
+    if(g.spk) A->asset_read(BMP_SPEAKER,A->status_line+SPK_X,BMP_SPEAKER_LEN);
 
     if(!g.flen)                          /* no frame yet: a capsule, as APRS TX's TRANSMIT */
         A->print_inverse(s+T_WAIT,WAIT_CAPS_X,0,true,true,(uint8_t)(WAIT_CAPS_X+T_WAIT_CHARS*4u));
@@ -517,11 +517,9 @@ static void draw(void){
     for(uint8_t x=0;x<128u;x+=2u) A->fb[3][x]|=0x40u;
     drawFreq(g.vfoFreq);
 
-    /* bottom line: "ok 12  -89dBm  sl 5/12/7": frames, RSSI of the last one,
+    /* bottom line: "ok 12  -89dBm": frames, RSSI of the last one */
-     * frames per slicer (<= 31 characters) */
     o=put(str,s+T_OK); o=puti(o,g.nOk); *o++=' '; *o++=' ';
     o=puti(o,g.rssi); o=put(o,s+T_DBM);
-    for(uint8_t k=0;k<NSL;k++){ if(k) *o++='/'; o=puti(o,g.good[k]); }
     tiny(49,o);
 }
 
@@ -533,10 +531,8 @@ static void handleKeys(void){
     g.prevKey=key;
     g.redraw=1;
     if(key==APP_KEY_EXIT) g.running=false;
-    else if(key==APP_KEY_MENU){
+    else if(key==APP_KEY_MENU){ g.flen=0; g.nOk=0; g.seq=0; g.rssi=0; }
-        g.flen=0; g.nOk=0; g.seq=0; g.rssi=0;
+    else if(key==APP_KEY_1){ g.spk^=1u; A->audio_path(g.spk); }   /* speaker, as FoxHunt's audio */
-        for(uint8_t k=0;k<NSL;k++) g.good[k]=0;
-    }
 }
 
 /* ---- keys and screen, between frames ---- */
@@ -587,7 +583,7 @@ static void listen(void){
         front(&d,adcRead(),&a,&b);
         bool bz=false;
         for(uint8_t k=0;k<NSL;k++){
-            if(slice(&sl[k],a,b)) accept(&sl[k],k);
+            if(slice(&sl[k],a,b)) accept(&sl[k]);
             bz|=busy(&sl[k]);
         }
         if(++cnt<HOUSE_EVERY) continue;
@@ -612,7 +608,11 @@ void app_main(const app_api_t *api){
     biasOn();
     api->backlight_on();
     g.vfoFreq=api->rx_freq();
-    api->audio_path(true);
+    /* Speaker amplifier (PA8) off: the decoder does not need it (tested on the
+     * radio, 2026-09-30): PA4, the voice-prompt DAC pin, joins the audio before
+     * the amplifier; only the BK4829 AF output must be on. Key 1 turns the
+     * speaker on to listen to the channel. */
+    api->audio_path(false);
     api->set_af(APP_AF_FM);
     api->delay_ms(50);
 

App/apps/aprsrx/build.sh

@@ -8,7 +8,7 @@ set -euo pipefail
 
 APP="$(basename "$PWD")"            # breakout, foxhunt, beacon, fm, ...
 APP_NAME="APRS RX"                  # <-- the only per-app line
-APP_VER="0.5"
+APP_VER="0.6"
 APP_API_MIN=2
 APP_VMA=${APP_VMA:-0x20000280}      # pinned overlay VMA (Core/py32f071xb.ld)
 OUT="${APP_NAME// /}"               # blob basename ("Broadcast FM" -> BroadcastFM)

App/apps/aprsrx/gen_assets.py

@@ -23,7 +23,7 @@ WAIT_CAPS = "WAIT"                          # status-bar capsule until a frame
 UI = [
     ("T_TITLE",  TITLE),
     ("T_WAIT",   WAIT_CAPS),
-    ("T_DBM",    "dBm  sl "),
+    ("T_DBM",    "dBm"),
     ("T_OK",     "ok "),
     ("T_KMH",    "km/h "),
     ("T_CUSTOM", "Custom-"),
@@ -47,6 +47,7 @@ a.const("UI_SIZE", ui_size)                 # the UI block read by draw()
 a.const("T_TITLE_CHARS", len(TITLE))
 a.const("T_WAIT_CHARS", len(WAIT_CAPS))
 a.table("T_MSG", MIC_MSG)                    # Mic-E standard messages
+a.u8("BMP_SPEAKER", [0x1c,0x1c,0x3e,0x7f,0x00,0x22,0x1c,0x41,0x22,0x1c])   # FoxHunt's
 a.i8("COS1200", cos_table(1200))            # 8 entries
 a.i8("COS2200", cos_table(2200))            # 48 entries
 a.main()