From 6cf27986b67996290c12f102d62c1a38e66e08d6 Mon Sep 17 00:00:00 2001 From: HiFiPhile Date: Mon, 1 Apr 2024 19:55:51 +0200 Subject: [PATCH] UAC2: add interrupt volume control to uac2_headset example. --- examples/device/uac2_headset/src/main.c | 41 +++++++++++++++++++ .../device/uac2_headset/src/tusb_config.h | 3 ++ .../device/uac2_headset/src/usb_descriptors.c | 7 +++- .../device/uac2_headset/src/usb_descriptors.h | 15 ++++--- 4 files changed, 59 insertions(+), 7 deletions(-) diff --git a/examples/device/uac2_headset/src/main.c b/examples/device/uac2_headset/src/main.c index 0ab72b2f3..35b7ac94b 100644 --- a/examples/device/uac2_headset/src/main.c +++ b/examples/device/uac2_headset/src/main.c @@ -96,6 +96,7 @@ uint8_t current_resolution; void led_blinking_task(void); void audio_task(void); +void audio_control_task(void); /*------------- MAIN -------------*/ int main(void) @@ -115,6 +116,7 @@ int main(void) { tud_task(); // TinyUSB device task audio_task(); + audio_control_task(); led_blinking_task(); } } @@ -428,6 +430,45 @@ void audio_task(void) } } +void audio_control_task(void) +{ + // Press on-board button to control volume + // Open host volume control, volume should switch between 10% and 100% + + // Poll every 50ms + const uint32_t interval_ms = 50; + static uint32_t start_ms = 0; + static uint32_t btn_prev = 0; + + if ( board_millis() - start_ms < interval_ms) return; // not enough time + start_ms += interval_ms; + + uint32_t btn = board_button_read(); + + if (!btn_prev && btn) + { + // Adjust volume between 0dB (100%) and -30dB (10%) + for (int i = 0; i < CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX + 1; i++) + { + volume[i] = volume[i] == 0 ? -VOLUME_CTRL_30_DB : 0; + } + + // 6.1 Interrupt Data Message + const audio_interrupt_data_t data = { + .bInfo = 0, // Class-specific interrupt, originated from an interface + .bAttribute = AUDIO_CS_REQ_CUR, // Caused by current settings + .wValue_cn_or_mcn = 0, // CH0: master volume + .wValue_cs = AUDIO_FU_CTRL_VOLUME, // Volume change + .wIndex_ep_or_int = 0, // From the interface itself + .wIndex_entity_id = UAC2_ENTITY_SPK_FEATURE_UNIT, // From feature unit + }; + + tud_audio_int_write(&data); + } + + btn_prev = btn; +} + //--------------------------------------------------------------------+ // BLINKING TASK //--------------------------------------------------------------------+ diff --git a/examples/device/uac2_headset/src/tusb_config.h b/examples/device/uac2_headset/src/tusb_config.h index b770483dc..4b08fa676 100644 --- a/examples/device/uac2_headset/src/tusb_config.h +++ b/examples/device/uac2_headset/src/tusb_config.h @@ -105,6 +105,9 @@ extern "C" { // AUDIO CLASS DRIVER CONFIGURATION //-------------------------------------------------------------------- +// Allow volume controlled by on-baord button +#define CFG_TUD_AUDIO_ENABLE_INTERRUPT_EP 1 + #define CFG_TUD_AUDIO_FUNC_1_DESC_LEN TUD_AUDIO_HEADSET_STEREO_DESC_LEN // How many formats are used, need to adjust USB descriptor if changed diff --git a/examples/device/uac2_headset/src/usb_descriptors.c b/examples/device/uac2_headset/src/usb_descriptors.c index 6d1e6a23f..ff4dc2acc 100644 --- a/examples/device/uac2_headset/src/usb_descriptors.c +++ b/examples/device/uac2_headset/src/usb_descriptors.c @@ -82,27 +82,32 @@ uint8_t const * tud_descriptor_device_cb(void) // 0 control, 1 In, 2 Bulk, 3 Iso, 4 In etc ... #define EPNUM_AUDIO_IN 0x03 #define EPNUM_AUDIO_OUT 0x03 + #define EPNUM_AUDIO_INT 0x01 #elif CFG_TUSB_MCU == OPT_MCU_NRF5X // ISO endpoints for NRF5x are fixed to 0x08 (0x88) #define EPNUM_AUDIO_IN 0x08 #define EPNUM_AUDIO_OUT 0x08 + #define EPNUM_AUDIO_INT 0x01 #elif CFG_TUSB_MCU == OPT_MCU_SAMG || CFG_TUSB_MCU == OPT_MCU_SAMX7X // SAMG & SAME70 don't support a same endpoint number with different direction IN and OUT // e.g EP1 OUT & EP1 IN cannot exist together #define EPNUM_AUDIO_IN 0x01 #define EPNUM_AUDIO_OUT 0x02 + #define EPNUM_AUDIO_INT 0x03 #elif CFG_TUSB_MCU == OPT_MCU_FT90X || CFG_TUSB_MCU == OPT_MCU_FT93X // FT9XX doesn't support a same endpoint number with different direction IN and OUT // e.g EP1 OUT & EP1 IN cannot exist together #define EPNUM_AUDIO_IN 0x01 #define EPNUM_AUDIO_OUT 0x02 + #define EPNUM_AUDIO_INT 0x03 #else #define EPNUM_AUDIO_IN 0x01 #define EPNUM_AUDIO_OUT 0x01 + #define EPNUM_AUDIO_INT 0x02 #endif uint8_t const desc_configuration[] = @@ -111,7 +116,7 @@ uint8_t const desc_configuration[] = TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100), // Interface number, string index, EP Out & EP In address, EP size - TUD_AUDIO_HEADSET_STEREO_DESCRIPTOR(2, EPNUM_AUDIO_OUT, EPNUM_AUDIO_IN | 0x80) + TUD_AUDIO_HEADSET_STEREO_DESCRIPTOR(2, EPNUM_AUDIO_OUT, EPNUM_AUDIO_IN | 0x80, EPNUM_AUDIO_INT | 0x80) }; // Invoked when received GET CONFIGURATION DESCRIPTOR diff --git a/examples/device/uac2_headset/src/usb_descriptors.h b/examples/device/uac2_headset/src/usb_descriptors.h index d7e170162..da0da83e8 100644 --- a/examples/device/uac2_headset/src/usb_descriptors.h +++ b/examples/device/uac2_headset/src/usb_descriptors.h @@ -55,6 +55,7 @@ enum + TUD_AUDIO_DESC_OUTPUT_TERM_LEN\ + TUD_AUDIO_DESC_INPUT_TERM_LEN\ + TUD_AUDIO_DESC_OUTPUT_TERM_LEN\ + + TUD_AUDIO_DESC_STD_AC_INT_EP_LEN\ /* Interface 1, Alternate 0 */\ + TUD_AUDIO_DESC_STD_AS_INT_LEN\ /* Interface 1, Alternate 1 */\ @@ -84,11 +85,11 @@ enum + TUD_AUDIO_DESC_STD_AS_ISO_EP_LEN\ + TUD_AUDIO_DESC_CS_AS_ISO_EP_LEN) -#define TUD_AUDIO_HEADSET_STEREO_DESCRIPTOR(_stridx, _epout, _epin) \ +#define TUD_AUDIO_HEADSET_STEREO_DESCRIPTOR(_stridx, _epout, _epin, _epint) \ /* Standard Interface Association Descriptor (IAD) */\ TUD_AUDIO_DESC_IAD(/*_firstitf*/ ITF_NUM_AUDIO_CONTROL, /*_nitfs*/ ITF_NUM_TOTAL, /*_stridx*/ 0x00),\ /* Standard AC Interface Descriptor(4.7.1) */\ - TUD_AUDIO_DESC_STD_AC(/*_itfnum*/ ITF_NUM_AUDIO_CONTROL, /*_nEPs*/ 0x00, /*_stridx*/ _stridx),\ + TUD_AUDIO_DESC_STD_AC(/*_itfnum*/ ITF_NUM_AUDIO_CONTROL, /*_nEPs*/ 0x01, /*_stridx*/ _stridx),\ /* Class-Specific AC Interface Header Descriptor(4.7.2) */\ TUD_AUDIO_DESC_CS_AC(/*_bcdADC*/ 0x0200, /*_category*/ AUDIO_FUNC_HEADSET, /*_totallen*/ TUD_AUDIO_DESC_CLK_SRC_LEN+TUD_AUDIO_DESC_FEATURE_UNIT_TWO_CHANNEL_LEN+TUD_AUDIO_DESC_INPUT_TERM_LEN+TUD_AUDIO_DESC_OUTPUT_TERM_LEN+TUD_AUDIO_DESC_INPUT_TERM_LEN+TUD_AUDIO_DESC_OUTPUT_TERM_LEN, /*_ctrl*/ AUDIO_CS_AS_INTERFACE_CTRL_LATENCY_POS),\ /* Clock Source Descriptor(4.7.2.1) */\ @@ -103,6 +104,8 @@ enum TUD_AUDIO_DESC_INPUT_TERM(/*_termid*/ UAC2_ENTITY_MIC_INPUT_TERMINAL, /*_termtype*/ AUDIO_TERM_TYPE_IN_GENERIC_MIC, /*_assocTerm*/ 0x00, /*_clkid*/ UAC2_ENTITY_CLOCK, /*_nchannelslogical*/ 0x01, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_idxchannelnames*/ 0x00, /*_ctrl*/ 0 * (AUDIO_CTRL_R << AUDIO_IN_TERM_CTRL_CONNECTOR_POS), /*_stridx*/ 0x00),\ /* Output Terminal Descriptor(4.7.2.5) */\ TUD_AUDIO_DESC_OUTPUT_TERM(/*_termid*/ UAC2_ENTITY_MIC_OUTPUT_TERMINAL, /*_termtype*/ AUDIO_TERM_TYPE_USB_STREAMING, /*_assocTerm*/ 0x00, /*_srcid*/ UAC2_ENTITY_MIC_INPUT_TERMINAL, /*_clkid*/ UAC2_ENTITY_CLOCK, /*_ctrl*/ 0x0000, /*_stridx*/ 0x00),\ + /* Standard AC Interrupt Endpoint Descriptor(4.8.2.1) */\ + TUD_AUDIO_DESC_STD_AC_INT_EP(/*_ep*/ _epint, /*_interval*/ 0x01), \ /* Standard AS Interface Descriptor(4.9.1) */\ /* Interface 1, Alternate 0 - default alternate setting with 0 bandwidth */\ TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)(ITF_NUM_AUDIO_STREAMING_SPK), /*_altset*/ 0x00, /*_nEPs*/ 0x00, /*_stridx*/ 0x05),\ @@ -114,7 +117,7 @@ enum /* Type I Format Type Descriptor(2.3.1.6 - Audio Formats) */\ TUD_AUDIO_DESC_TYPE_I_FORMAT(CFG_TUD_AUDIO_FUNC_1_FORMAT_1_N_BYTES_PER_SAMPLE_RX, CFG_TUD_AUDIO_FUNC_1_FORMAT_1_RESOLUTION_RX),\ /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.10.1.1) */\ - TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epout, /*_attr*/ (uint8_t) (TUSB_XFER_ISOCHRONOUS | TUSB_ISO_EP_ATT_ADAPTIVE | TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ TUD_AUDIO_EP_SIZE(CFG_TUD_AUDIO_FUNC_1_MAX_SAMPLE_RATE, CFG_TUD_AUDIO_FUNC_1_FORMAT_1_N_BYTES_PER_SAMPLE_RX, CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX), /*_interval*/ 0x01),\ + TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epout, /*_attr*/ (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_ADAPTIVE | (uint8_t)TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ TUD_AUDIO_EP_SIZE(CFG_TUD_AUDIO_FUNC_1_MAX_SAMPLE_RATE, CFG_TUD_AUDIO_FUNC_1_FORMAT_1_N_BYTES_PER_SAMPLE_RX, CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX), /*_interval*/ 0x01),\ /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.10.1.2) */\ TUD_AUDIO_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO_CTRL_NONE, /*_lockdelayunit*/ AUDIO_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_MILLISEC, /*_lockdelay*/ 0x0001),\ /* Interface 1, Alternate 2 - alternate interface for data streaming */\ @@ -124,7 +127,7 @@ enum /* Type I Format Type Descriptor(2.3.1.6 - Audio Formats) */\ TUD_AUDIO_DESC_TYPE_I_FORMAT(CFG_TUD_AUDIO_FUNC_1_FORMAT_2_N_BYTES_PER_SAMPLE_RX, CFG_TUD_AUDIO_FUNC_1_FORMAT_2_RESOLUTION_RX),\ /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.10.1.1) */\ - TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epout, /*_attr*/ (uint8_t) (TUSB_XFER_ISOCHRONOUS | TUSB_ISO_EP_ATT_ADAPTIVE | TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ TUD_AUDIO_EP_SIZE(CFG_TUD_AUDIO_FUNC_1_MAX_SAMPLE_RATE, CFG_TUD_AUDIO_FUNC_1_FORMAT_2_N_BYTES_PER_SAMPLE_RX, CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX), /*_interval*/ 0x01),\ + TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epout, /*_attr*/ (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_ADAPTIVE | (uint8_t)TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ TUD_AUDIO_EP_SIZE(CFG_TUD_AUDIO_FUNC_1_MAX_SAMPLE_RATE, CFG_TUD_AUDIO_FUNC_1_FORMAT_2_N_BYTES_PER_SAMPLE_RX, CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX), /*_interval*/ 0x01),\ /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.10.1.2) */\ TUD_AUDIO_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO_CTRL_NONE, /*_lockdelayunit*/ AUDIO_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_MILLISEC, /*_lockdelay*/ 0x0001),\ /* Standard AS Interface Descriptor(4.9.1) */\ @@ -138,7 +141,7 @@ enum /* Type I Format Type Descriptor(2.3.1.6 - Audio Formats) */\ TUD_AUDIO_DESC_TYPE_I_FORMAT(CFG_TUD_AUDIO_FUNC_1_FORMAT_1_N_BYTES_PER_SAMPLE_TX, CFG_TUD_AUDIO_FUNC_1_FORMAT_1_RESOLUTION_TX),\ /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.10.1.1) */\ - TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epin, /*_attr*/ (uint8_t) (TUSB_XFER_ISOCHRONOUS | TUSB_ISO_EP_ATT_ASYNCHRONOUS | TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ TUD_AUDIO_EP_SIZE(CFG_TUD_AUDIO_FUNC_1_MAX_SAMPLE_RATE, CFG_TUD_AUDIO_FUNC_1_FORMAT_1_N_BYTES_PER_SAMPLE_TX, CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX), /*_interval*/ 0x01),\ + TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epin, /*_attr*/ (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_ASYNCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ TUD_AUDIO_EP_SIZE(CFG_TUD_AUDIO_FUNC_1_MAX_SAMPLE_RATE, CFG_TUD_AUDIO_FUNC_1_FORMAT_1_N_BYTES_PER_SAMPLE_TX, CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX), /*_interval*/ 0x01),\ /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.10.1.2) */\ TUD_AUDIO_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO_CTRL_NONE, /*_lockdelayunit*/ AUDIO_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_UNDEFINED, /*_lockdelay*/ 0x0000),\ /* Interface 2, Alternate 2 - alternate interface for data streaming */\ @@ -148,7 +151,7 @@ enum /* Type I Format Type Descriptor(2.3.1.6 - Audio Formats) */\ TUD_AUDIO_DESC_TYPE_I_FORMAT(CFG_TUD_AUDIO_FUNC_1_FORMAT_2_N_BYTES_PER_SAMPLE_TX, CFG_TUD_AUDIO_FUNC_1_FORMAT_2_RESOLUTION_TX),\ /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.10.1.1) */\ - TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epin, /*_attr*/ (uint8_t) (TUSB_XFER_ISOCHRONOUS | TUSB_ISO_EP_ATT_ASYNCHRONOUS | TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ TUD_AUDIO_EP_SIZE(CFG_TUD_AUDIO_FUNC_1_MAX_SAMPLE_RATE, CFG_TUD_AUDIO_FUNC_1_FORMAT_2_N_BYTES_PER_SAMPLE_TX, CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX), /*_interval*/ 0x01),\ + TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epin, /*_attr*/ (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_ASYNCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ TUD_AUDIO_EP_SIZE(CFG_TUD_AUDIO_FUNC_1_MAX_SAMPLE_RATE, CFG_TUD_AUDIO_FUNC_1_FORMAT_2_N_BYTES_PER_SAMPLE_TX, CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX), /*_interval*/ 0x01),\ /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.10.1.2) */\ TUD_AUDIO_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO_CTRL_NONE, /*_lockdelayunit*/ AUDIO_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_UNDEFINED, /*_lockdelay*/ 0x0000)