mirror of
https://github.com/halleysfifthinc/AVCLAN-Mockingboard.git
synced 2026-08-07 01:13:18 +00:00
Add headset function control
This commit is contained in:
Allen Hill
+119
-8
@@ -112,7 +112,7 @@
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#define READING_NBITS GPIOR2
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#define READING_PARITY GPIOR3
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#ifdef SOFTWARE_DEBUG
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#ifndef NDEBUG
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#define TCB_CNTMODE TCB_CNTMODE_FRQPW_gc
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#else
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#define TCB_CNTMODE TCB_CNTMODE_PW_gc
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@@ -128,7 +128,7 @@ uint8_t *cd_Time_Sec;
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cd_modes CD_Mode;
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#ifdef SOFTWARE_DEBUG
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#ifndef NDEBUG
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volatile uint8_t pulse_count = 0;
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volatile uint16_t period = 0;
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#endif
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@@ -164,11 +164,32 @@ static const uint8_t cdloading_resp[] = {dev_CD_CHANGER,
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0x01,
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0x02};
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/* Disable serial and periodic interrupts during AVCLAN reads.
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Not using cli() because AVCLAN reads depend on other interrupts. */
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// pending WO1 toggles (even); signed to avoid underflows from a stray OVF
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static volatile int8_t mic_ntoggles = 0;
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// TCA0 period (CMP0/TOP) in ticks at F_CPU with the CLKSEL=DIV1024 prescaler.
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// A press phase is ~100 ms; the final LOW phase is stretched to mic_quiet_ticks
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// (~500 ms) so consecutive presses stay distinct
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constexpr uint16_t mic_press_ticks = (uint16_t)((F_CPU / 1024UL) / 10UL);
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constexpr uint16_t mic_quiet_ticks = (uint16_t)((F_CPU / 1024UL) / 2UL);
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/* Disable non-read related interrupts (USART RX, PIT, TCA) during AVCLAN reads.
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*/
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static inline void stopEvent() {
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RTC.PITINTCTRL &= ~(1 << RTC_PI_bp);
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USART0.CTRLA &= ~(1 << USART_RXCIE_bp);
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// WO1 toggles don't depend on OVF interrupt, but the OVF interrupt *DOES*
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// count the toggles So, disabling the OVF interrupt alone is insufficient,
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// we must also disable the timer
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TCA0.SINGLE.INTCTRL &= ~TCA_SINGLE_OVF_bm;
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// Target pulse length is ~40-150ms, with interval between pulses of
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// ~100-200ms
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// The longest AVCLAN frame duration is ~15ms, so stretching either phase
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// (high/low) won't exceed the allowable ranges for pulses (high) or
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// intervals (low)
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TCA0.SINGLE.CTRLA &= ~TCA_SINGLE_ENABLE_bm;
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}
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// Re-enable serial and periodic interrupts.
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@@ -176,6 +197,13 @@ static inline void startEvent() {
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if (AVCLAN_isPlaying()) // Reenable PIT interrupt if currently playing
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RTC.PITINTCTRL |= (1 << RTC_PI_bp);
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USART0.CTRLA |= (1 << USART_RXCIE_bp);
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// Resume/re-arm mic-press timer only while a press is in progress.
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// Enable before unmasking so a pending final-phase OVF lands after re-enable
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// and the ISR's own ENABLE clear wins (no spurious extra period).
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if (mic_ntoggles) {
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TCA0.SINGLE.CTRLA |= TCA_SINGLE_ENABLE_bm;
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TCA0.SINGLE.INTCTRL |= TCA_SINGLE_OVF_bm;
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}
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}
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// clang-format off
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@@ -221,9 +249,66 @@ void AVCLAN_muteDevice(bool mute) {
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}
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}
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#ifndef NDEBUG
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// Toggle PB1 and return its new level.
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bool AVCLAN_micToggle() {
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// Take manual control of PB1 (CMP1EN gives TCA0 control of WO1/PB1 level)
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TCA0.SINGLE.CTRLB &= ~TCA_SINGLE_CMP1EN_bm;
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VPORTB.OUT ^= PIN1_bm;
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return (VPORTB.OUT & PIN1_bm) != 0;
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}
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bool AVCLAN_isMediaFunctioning() { return mic_ntoggles != 0; }
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#endif
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// Begin a press waveform of `nphases` × 100 ms level segments.
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// - ~Immediately toggles high, alternates each phase (1 = single HIGH press, 3
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// = skip H/L/H, etc).
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// - Halting the timer freezes WO1 at its last level; must run even number of
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// phases to ensure we return to low
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static void mic_pulse(uint8_t nphases) {
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ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
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if (mic_ntoggles) // Skip if already pulsing
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return;
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// must be even to return to idle-low
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mic_ntoggles = (nphases & 0x01) ? nphases + 1 : nphases;
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TCA0.SINGLE.CTRLB |=
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TCA_SINGLE_CMP1EN_bm; // Reassert TCA control of WO1/PB1
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TCA0.SINGLE.CTRLC = 0; // Reset WO1 level just in case
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TCA0.SINGLE.CNT = 0;
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TCA0.SINGLE.CMP0 = // TOP
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mic_press_ticks; // always restore default ~100 ms period
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TCA0.SINGLE.INTFLAGS = TCA_SINGLE_OVF_bm; // clear any stale flag
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TCA0.SINGLE.INTCTRL |= TCA_SINGLE_OVF_bm;
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TCA0.SINGLE.CTRLA |= TCA_SINGLE_ENABLE_bm;
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}
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}
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// OVF ISR counts phases, stretches the final LOW phase into a quiet gap, and
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// stops the timer on the last one.
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ISR(TCA0_OVF_vect) {
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TCA0.SINGLE.INTFLAGS = TCA_SINGLE_OVF_bm;
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if (--mic_ntoggles == 1) {
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// Stretch final phase to a ~500 ms idle-low so back-to-back presses stay
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// distinct
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TCA0.SINGLE.CMP0 = mic_quiet_ticks;
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} else if (mic_ntoggles <= 0) {
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mic_ntoggles = 0; // clamp to avoid perma-lockout in mic_pulse
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TCA0.SINGLE.CTRLA &= ~TCA_SINGLE_ENABLE_bm;
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}
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}
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// Emulate a single play/pause button press on the source device.
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void AVCLAN_micPlayPause() { mic_pulse(1); }
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// Emulate a skip-forward button press: H / L / H.
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void AVCLAN_micSkip() { mic_pulse(3); }
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// Sets CD_mode to play and resets timer count (so that the next interrupt is in
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// 1 sec)
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void AVCLAN_startPlaying() {
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static void AVCLAN_startPlaying() {
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AVCLAN_micPlayPause();
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CD_Mode = stPlay;
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ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
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loop_until_bit_is_clear(RTC_PITSTATUS, RTC_CNTBUSY_bp);
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@@ -234,7 +319,8 @@ void AVCLAN_startPlaying() {
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// Sets CD_mode to play and resets timer count (so that the next interrupt is in
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// 1 sec)
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void AVCLAN_stopPlaying() {
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static void AVCLAN_stopPlaying() {
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AVCLAN_micPlayPause();
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CD_Mode = stStop;
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RTC.PITINTCTRL &= ~(1 << RTC_PI_bp);
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}
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@@ -256,6 +342,26 @@ void AVCLAN_init() {
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EVSYS.ASYNCCH0 = EVSYS_ASYNCCH0_AC2_OUT_gc;
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EVSYS.ASYNCUSER0 = EVSYS_ASYNCUSER0_ASYNCCH0_gc; // USER0 is TCB0
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// PB1 needs to be set as an output for TCA0 to set the level
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PORTB.DIRSET = PIN1_bm;
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// Experimentally, a press should be ~100ms; multiple presses can be separated
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// by the same ~100ms (but separate pulse trains need more separation to
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// remain distinct)
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TCA0.SINGLE.CTRLA = TCA_SINGLE_CLKSEL_DIV1024_gc;
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// In frequency (FRQ) mode, channel N compare match triggers "UPDATE"
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// When CMPnEN is set, TCA0 has control of the output level for the channel's
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// pin, and UPDATE toggles the level
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// Channel 1 controls WO1, which is mapped to PB1
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TCA0.SINGLE.CTRLB = TCA_SINGLE_WGMODE_FRQ_gc | TCA_SINGLE_CMP1EN_bm;
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TCA0.SINGLE.CTRLC = 0; // Preset WO1 level low just to be sure
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// toggle WO1 ~immediately after each period start; should go low => high
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TCA0.SINGLE.CMP1 = 2;
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TCA0.SINGLE.INTFLAGS = TCA_SINGLE_OVF_bm; // Clear OVF flag just in case
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TCA0.SINGLE.INTCTRL = 0;
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// TCB0 for read bit timing
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TCB0.CTRLB = TCB_CNTMODE;
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TCB0.INTCTRL = TCB_CAPT_bm;
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@@ -467,7 +573,7 @@ avclan_bit_t AVCLAN_sendbyte(const uint8_t *byte) {
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}
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ISR(TCB0_INT_vect) {
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#ifdef SOFTWARE_DEBUG
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#ifndef NDEBUG
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pulse_count++;
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period = TCB0.CNT;
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#endif
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@@ -1044,6 +1150,7 @@ response_t AVCLAN_handleframe(const AVCLAN_frame_t *in, AVCLAN_frame_t *out) {
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respond = r_Handled;
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break;
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case PACK3(dev_CMD_SW, dev_CD_CHANGER, Track_Seek_Up):
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AVCLAN_micSkip();
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cd_status.state = cd_SEEKING_TRACK;
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if (*cd_Track < 98)
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++*cd_Track;
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@@ -1347,7 +1454,11 @@ void AVCLAN_normalizeState() {
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// }
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}
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#ifdef SOFTWARE_DEBUG
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#ifndef NDEBUG
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// Only used immediately below
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#define XSTR(x) #x
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#define STR(x) XSTR(x)
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uint16_t pulses[100];
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uint16_t periods[100];
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+5
-4
@@ -222,11 +222,12 @@ void AVCLAN_incrementTime();
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void AVCLAN_setTime(uint8_t mins, uint8_t secs);
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void AVCLAN_normalizeState();
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#ifdef SOFTWARE_DEBUG
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#ifndef NDEBUG
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bool AVCLAN_micToggle();
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void AVCLAN_micPlayPause();
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void AVCLAN_micSkip();
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bool AVCLAN_isMediaFunctioning();
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void AVCLan_Measure();
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#endif
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#ifdef HARDWARE_DEBUG
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void SetHighLow();
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#endif
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#endif // __AVCLANDRV_H
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+18
-6
@@ -249,7 +249,20 @@ int main() {
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}
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break;
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#ifdef SOFTWARE_DEBUG
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#ifndef NDEBUG
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case 'g': AVCLAN_micToggle(); break;
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case 'p':
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RS232_Print("Play/pause begin\n");
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AVCLAN_micPlayPause();
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while (AVCLAN_isMediaFunctioning()) {}
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RS232_Print("Play/pause end\n");
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break;
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case 's':
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RS232_Print("Skip begin\n");
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AVCLAN_micSkip();
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while (AVCLAN_isMediaFunctioning()) {}
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RS232_Print("Skip end\n");
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break;
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case 'M': AVCLan_Measure(); break;
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#endif
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@@ -403,12 +416,11 @@ void print_help() {
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"k - Toggle character echo\n"
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"E - Beep\n"
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"P - Play\n"
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#ifdef SOFTWARE_DEBUG
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#ifndef NDEBUG
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"g - Toggle MIC_CONTROL high/low\n"
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"p - MIC play/pause pulse\n"
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"s - MIC skip pulse\n"
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"M - Measure bit-timing (pulse-widths and periods)\n"
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#endif
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#ifdef HARDWARE_DEBUG
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"1 - Hold High/low\n"
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"E - Print line status\n"
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#endif
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"? - Print this message\n");
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}
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