mirror of
https://github.com/halleysfifthinc/AVCLAN-Mockingboard.git
synced 2026-08-07 01:13:18 +00:00
reorg some functionality
This commit is contained in:
Allen Hill
+84
-83
@@ -173,86 +173,6 @@ static volatile int8_t mic_ntoggles = 0;
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static constexpr uint16_t mic_press_ticks = (uint16_t)((F_CPU / 1024UL) / 10UL);
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static 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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ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
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RTC.PITINTCTRL &= ~RTC_PI_bm;
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USART0.CTRLA &= ~USART_RXCIE_bm;
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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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}
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// Re-enable serial and periodic interrupts.
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static inline void startEvent() {
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ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
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if (AVCLAN_isPlaying()) // Reenable PIT interrupt if currently playing
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RTC.PITINTCTRL |= RTC_PI_bm;
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USART0.CTRLA |= USART_RXCIE_bm;
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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
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// re-enable 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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}
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// clang-format off
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static inline void AVCLAN_setBusIdle() {
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__asm__ __volatile__(
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"cbi %[vporta_out], 4; \n\t"
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"sbi %[vportc_out], 0; \n\t"
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::[vporta_out] "I"(_SFR_IO_ADDR(VPORTA_OUT)),
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[vportc_out] "I"(_SFR_IO_ADDR(VPORTC_OUT)));
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}
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static inline void AVCLAN_setBusDriven() {
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__asm__ __volatile__(
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"sbi %[vporta_out], 4; \n\t"
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"cbi %[vportc_out], 0; \n\t"
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::[vporta_out] "I"(_SFR_IO_ADDR(VPORTA_OUT)),
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[vportc_out] "I"(_SFR_IO_ADDR(VPORTC_OUT)));
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}
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// clang-format on
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// Returns true if device TX is muted on AVCLAN bus
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static inline bool AVCLAN_ismuted() {
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return (((VPORTA_DIR & PIN4_bm) | (VPORTA_DIR & PIN0_bm)) == 0);
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}
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// Mute device TX on AVCLAN bus
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void AVCLAN_muteDevice(bool mute) {
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if (mute) {
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// clang-format off
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__asm__ __volatile__("cbi %[vporta_dir], 4; \n\t" // set as INPUT (output values ignored)
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"cbi %[vportc_dir], 0; \n\t" // set as INPUT (output values ignored)
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::
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[vporta_dir] "I"(_SFR_IO_ADDR(VPORTA_DIR)),
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[vportc_dir] "I"(_SFR_IO_ADDR(VPORTC_DIR)));
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// clang-format on
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} else {
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// clang-format off
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__asm__ __volatile__("sbi %[vporta_dir], 4; \n\t"
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"sbi %[vportc_dir], 0; \n\t"
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::
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[vporta_dir] "I"(_SFR_IO_ADDR(VPORTA_DIR)),
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[vportc_dir] "I"(_SFR_IO_ADDR(VPORTC_DIR)));
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// clang-format on
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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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@@ -309,6 +229,44 @@ 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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/* 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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ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
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RTC.PITINTCTRL &= ~RTC_PI_bm;
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USART0.CTRLA &= ~USART_RXCIE_bm;
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// WO1 toggles don't depend on OVF interrupt, but the OVF interrupt *DOES*
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// count the toggles
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// So, disabling the OVF interrupt alone is insufficient, we must also
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// 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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}
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// Re-enable serial and periodic interrupts.
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static inline void startEvent() {
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ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
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if (AVCLAN_isPlaying()) // Reenable PIT interrupt if currently playing
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RTC.PITINTCTRL |= RTC_PI_bm;
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USART0.CTRLA |= USART_RXCIE_bm;
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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
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// re-enable 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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}
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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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static void AVCLAN_startPlaying() {
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@@ -323,10 +281,53 @@ static 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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static void AVCLAN_stopPlaying() {
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AVCLAN_micPlayPause();
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CD_Mode = stStop;
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void AVCLAN_stopPlaying() {
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RTC.PITINTCTRL &= ~RTC_PI_bm;
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CD_Mode = stStop;
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AVCLAN_micPlayPause();
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}
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// clang-format off
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static inline void AVCLAN_setBusIdle() {
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__asm__ __volatile__(
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"cbi %[vporta_out], 4; \n\t"
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"sbi %[vportc_out], 0; \n\t"
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::[vporta_out] "I"(_SFR_IO_ADDR(VPORTA_OUT)),
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[vportc_out] "I"(_SFR_IO_ADDR(VPORTC_OUT)));
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}
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static inline void AVCLAN_setBusDriven() {
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__asm__ __volatile__(
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"sbi %[vporta_out], 4; \n\t"
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"cbi %[vportc_out], 0; \n\t"
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::[vporta_out] "I"(_SFR_IO_ADDR(VPORTA_OUT)),
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[vportc_out] "I"(_SFR_IO_ADDR(VPORTC_OUT)));
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}
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// clang-format on
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// Returns true if device TX is muted on AVCLAN bus
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static inline bool AVCLAN_ismuted() {
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return (((VPORTA_DIR & PIN4_bm) | (VPORTA_DIR & PIN0_bm)) == 0);
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}
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// Mute device TX on AVCLAN bus
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void AVCLAN_muteDevice(bool mute) {
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if (mute) {
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// clang-format off
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__asm__ __volatile__("cbi %[vporta_dir], 4; \n\t" // set as INPUT (output values ignored)
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"cbi %[vportc_dir], 0; \n\t" // set as INPUT (output values ignored)
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::
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[vporta_dir] "I"(_SFR_IO_ADDR(VPORTA_DIR)),
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[vportc_dir] "I"(_SFR_IO_ADDR(VPORTC_DIR)));
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// clang-format on
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} else {
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// clang-format off
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__asm__ __volatile__("sbi %[vporta_dir], 4; \n\t"
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"sbi %[vportc_dir], 0; \n\t"
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::
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[vporta_dir] "I"(_SFR_IO_ADDR(VPORTA_DIR)),
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[vportc_dir] "I"(_SFR_IO_ADDR(VPORTC_DIR)));
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// clang-format on
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}
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}
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void AVCLAN_init() {
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