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Fix track change logic (track is/should be serialized as BCD)

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Allen Hill
2026-06-15 18:52:21 +00:00
parent c591e87c98
commit da17c724d6
2 changed files with 17 additions and 8 deletions
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src/avclandrv.c
+14 -5
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@@ -324,10 +324,11 @@ static uint8_t toBCD(uint8_t x) {
}
// Serialize cd_status into the wire format. The struct layout mirrors the wire
// format byte-for-byte, except for mins/secs, which need converted from integer
// to BCD
// format byte-for-byte, except for track/mins/secs, which need converted from
// decimal to BCD
static void serializeCDStatus(uint8_t *dst) {
memcpy(dst, &cd_status, sizeof(cd_status));
dst[3] = toBCD(cd_status.track);
dst[4] = toBCD(cd_status.mins);
dst[5] = toBCD(cd_status.secs);
}
@@ -1037,7 +1038,10 @@ response_t AVCLAN_handleframe(const AVCLAN_frame_t *in, AVCLAN_frame_t *out) {
break;
case PACK3(dev_CMD_SW, dev_CD_CHANGER, Track_Seek_Up):
cd_status.state = cd_SEEKING_TRACK;
(*cd_Track)++;
if (*cd_Track < 98)
++*cd_Track;
else
*cd_Track = 1;
*cd_Time_Min = 0xff;
*cd_Time_Sec = 0x7f;
cd_status.flags |= cd_SCAN;
@@ -1047,10 +1051,15 @@ response_t AVCLAN_handleframe(const AVCLAN_frame_t *in, AVCLAN_frame_t *out) {
break;
case PACK3(dev_CMD_SW, dev_CD_CHANGER, Track_Seek_Down):
cd_status.state = cd_SEEKING_TRACK;
(*cd_Track)--;
// Track down returns to track beginning if in ~middle of song
if (*cd_Time_Min == 0 && *cd_Time_Sec < 0x05) {
if (*cd_Track > 1)
--*cd_Track;
else
*cd_Track = 99;
}
*cd_Time_Min = 0xff;
*cd_Time_Sec = 0x7f;
cd_status.flags |= cd_SCAN;
cd_status.flags2 = 0xc0;
AVCLAN_generateStatus(out);
respond = r_TrackChange;