diff options
Diffstat (limited to 'tinyusb/examples/device/uac2_headset/src/main.c')
| -rwxr-xr-x | tinyusb/examples/device/uac2_headset/src/main.c | 441 |
1 files changed, 441 insertions, 0 deletions
diff --git a/tinyusb/examples/device/uac2_headset/src/main.c b/tinyusb/examples/device/uac2_headset/src/main.c new file mode 100755 index 00000000..790af088 --- /dev/null +++ b/tinyusb/examples/device/uac2_headset/src/main.c @@ -0,0 +1,441 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2020 Jerzy Kasenberg + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + */ + +#include <stdio.h> +#include <string.h> + +#include "bsp/board.h" +#include "tusb.h" +#include "usb_descriptors.h" + +//--------------------------------------------------------------------+ +// MACRO CONSTANT TYPEDEF PROTOTYPES +//--------------------------------------------------------------------+ + +// List of supported sample rates +#if defined(__RX__) +const uint32_t sample_rates[] = {44100, 48000}; +#else +const uint32_t sample_rates[] = {44100, 48000, 88200, 96000}; +#endif +uint32_t current_sample_rate = 44100; + +#define N_SAMPLE_RATES TU_ARRAY_SIZE(sample_rates) + +/* Blink pattern + * - 25 ms : streaming data + * - 250 ms : device not mounted + * - 1000 ms : device mounted + * - 2500 ms : device is suspended + */ +enum +{ + BLINK_STREAMING = 25, + BLINK_NOT_MOUNTED = 250, + BLINK_MOUNTED = 1000, + BLINK_SUSPENDED = 2500, +}; + +enum +{ + VOLUME_CTRL_0_DB = 0, + VOLUME_CTRL_10_DB = 2560, + VOLUME_CTRL_20_DB = 5120, + VOLUME_CTRL_30_DB = 7680, + VOLUME_CTRL_40_DB = 10240, + VOLUME_CTRL_50_DB = 12800, + VOLUME_CTRL_60_DB = 15360, + VOLUME_CTRL_70_DB = 17920, + VOLUME_CTRL_80_DB = 20480, + VOLUME_CTRL_90_DB = 23040, + VOLUME_CTRL_100_DB = 25600, + VOLUME_CTRL_SILENCE = 0x8000, +}; + +static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED; + +// Audio controls +// Current states +int8_t mute[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX + 1]; // +1 for master channel 0 +int16_t volume[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX + 1]; // +1 for master channel 0 + +// Buffer for microphone data +int32_t mic_buf[CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ / 4]; +// Buffer for speaker data +int32_t spk_buf[CFG_TUD_AUDIO_FUNC_1_EP_OUT_SW_BUF_SZ / 4]; +// Speaker data size received in the last frame +int spk_data_size; +// Resolution per format +const uint8_t resolutions_per_format[CFG_TUD_AUDIO_FUNC_1_N_FORMATS] = {CFG_TUD_AUDIO_FUNC_1_FORMAT_1_RESOLUTION_RX, + CFG_TUD_AUDIO_FUNC_1_FORMAT_2_RESOLUTION_RX}; +// Current resolution, update on format change +uint8_t current_resolution; + +void led_blinking_task(void); +void audio_task(void); + +/*------------- MAIN -------------*/ +int main(void) +{ + board_init(); + + tusb_init(); + + TU_LOG1("Headset running\r\n"); + + while (1) + { + tud_task(); // TinyUSB device task + audio_task(); + led_blinking_task(); + } + + return 0; +} + +//--------------------------------------------------------------------+ +// Device callbacks +//--------------------------------------------------------------------+ + +// Invoked when device is mounted +void tud_mount_cb(void) +{ + blink_interval_ms = BLINK_MOUNTED; +} + +// Invoked when device is unmounted +void tud_umount_cb(void) +{ + blink_interval_ms = BLINK_NOT_MOUNTED; +} + +// Invoked when usb bus is suspended +// remote_wakeup_en : if host allow us to perform remote wakeup +// Within 7ms, device must draw an average of current less than 2.5 mA from bus +void tud_suspend_cb(bool remote_wakeup_en) +{ + (void)remote_wakeup_en; + blink_interval_ms = BLINK_SUSPENDED; +} + +// Invoked when usb bus is resumed +void tud_resume_cb(void) +{ + blink_interval_ms = BLINK_MOUNTED; +} + +// Helper for clock get requests +static bool tud_audio_clock_get_request(uint8_t rhport, audio_control_request_t const *request) +{ + TU_ASSERT(request->bEntityID == UAC2_ENTITY_CLOCK); + + if (request->bControlSelector == AUDIO_CS_CTRL_SAM_FREQ) + { + if (request->bRequest == AUDIO_CS_REQ_CUR) + { + TU_LOG1("Clock get current freq %u\r\n", current_sample_rate); + + audio_control_cur_4_t curf = { tu_htole32(current_sample_rate) }; + return tud_audio_buffer_and_schedule_control_xfer(rhport, (tusb_control_request_t const *)request, &curf, sizeof(curf)); + } + else if (request->bRequest == AUDIO_CS_REQ_RANGE) + { + audio_control_range_4_n_t(N_SAMPLE_RATES) rangef = + { + .wNumSubRanges = tu_htole16(N_SAMPLE_RATES) + }; + TU_LOG1("Clock get %d freq ranges\r\n", N_SAMPLE_RATES); + for(uint8_t i = 0; i < N_SAMPLE_RATES; i++) + { + rangef.subrange[i].bMin = sample_rates[i]; + rangef.subrange[i].bMax = sample_rates[i]; + rangef.subrange[i].bRes = 0; + TU_LOG1("Range %d (%d, %d, %d)\r\n", i, (int)rangef.subrange[i].bMin, (int)rangef.subrange[i].bMax, (int)rangef.subrange[i].bRes); + } + + return tud_audio_buffer_and_schedule_control_xfer(rhport, (tusb_control_request_t const *)request, &rangef, sizeof(rangef)); + } + } + else if (request->bControlSelector == AUDIO_CS_CTRL_CLK_VALID && + request->bRequest == AUDIO_CS_REQ_CUR) + { + audio_control_cur_1_t cur_valid = { .bCur = 1 }; + TU_LOG1("Clock get is valid %u\r\n", cur_valid.bCur); + return tud_audio_buffer_and_schedule_control_xfer(rhport, (tusb_control_request_t const *)request, &cur_valid, sizeof(cur_valid)); + } + TU_LOG1("Clock get request not supported, entity = %u, selector = %u, request = %u\r\n", + request->bEntityID, request->bControlSelector, request->bRequest); + return false; +} + +// Helper for clock set requests +static bool tud_audio_clock_set_request(uint8_t rhport, audio_control_request_t const *request, uint8_t const *buf) +{ + (void)rhport; + + TU_ASSERT(request->bEntityID == UAC2_ENTITY_CLOCK); + TU_VERIFY(request->bRequest == AUDIO_CS_REQ_CUR); + + if (request->bControlSelector == AUDIO_CS_CTRL_SAM_FREQ) + { + TU_VERIFY(request->wLength == sizeof(audio_control_cur_4_t)); + + current_sample_rate = ((audio_control_cur_4_t *)buf)->bCur; + + TU_LOG1("Clock set current freq: %d\r\n", current_sample_rate); + + return true; + } + else + { + TU_LOG1("Clock set request not supported, entity = %u, selector = %u, request = %u\r\n", + request->bEntityID, request->bControlSelector, request->bRequest); + return false; + } +} + +// Helper for feature unit get requests +static bool tud_audio_feature_unit_get_request(uint8_t rhport, audio_control_request_t const *request) +{ + TU_ASSERT(request->bEntityID == UAC2_ENTITY_SPK_FEATURE_UNIT); + + if (request->bControlSelector == AUDIO_FU_CTRL_MUTE && request->bRequest == AUDIO_CS_REQ_CUR) + { + audio_control_cur_1_t mute1 = { .bCur = mute[request->bChannelNumber] }; + TU_LOG1("Get channel %u mute %d\r\n", request->bChannelNumber, mute1.bCur); + return tud_audio_buffer_and_schedule_control_xfer(rhport, (tusb_control_request_t const *)request, &mute1, sizeof(mute1)); + } + else if (UAC2_ENTITY_SPK_FEATURE_UNIT && request->bControlSelector == AUDIO_FU_CTRL_VOLUME) + { + if (request->bRequest == AUDIO_CS_REQ_RANGE) + { + audio_control_range_2_n_t(1) range_vol = { + .wNumSubRanges = tu_htole16(1), + .subrange[0] = { .bMin = tu_htole16(-VOLUME_CTRL_50_DB), tu_htole16(VOLUME_CTRL_0_DB), tu_htole16(256) } + }; + TU_LOG1("Get channel %u volume range (%d, %d, %u) dB\r\n", request->bChannelNumber, + range_vol.subrange[0].bMin / 256, range_vol.subrange[0].bMax / 256, range_vol.subrange[0].bRes / 256); + return tud_audio_buffer_and_schedule_control_xfer(rhport, (tusb_control_request_t const *)request, &range_vol, sizeof(range_vol)); + } + else if (request->bRequest == AUDIO_CS_REQ_CUR) + { + audio_control_cur_2_t cur_vol = { .bCur = tu_htole16(volume[request->bChannelNumber]) }; + TU_LOG1("Get channel %u volume %d dB\r\n", request->bChannelNumber, cur_vol.bCur / 256); + return tud_audio_buffer_and_schedule_control_xfer(rhport, (tusb_control_request_t const *)request, &cur_vol, sizeof(cur_vol)); + } + } + TU_LOG1("Feature unit get request not supported, entity = %u, selector = %u, request = %u\r\n", + request->bEntityID, request->bControlSelector, request->bRequest); + + return false; +} + +// Helper for feature unit set requests +static bool tud_audio_feature_unit_set_request(uint8_t rhport, audio_control_request_t const *request, uint8_t const *buf) +{ + (void)rhport; + + TU_ASSERT(request->bEntityID == UAC2_ENTITY_SPK_FEATURE_UNIT); + TU_VERIFY(request->bRequest == AUDIO_CS_REQ_CUR); + + if (request->bControlSelector == AUDIO_FU_CTRL_MUTE) + { + TU_VERIFY(request->wLength == sizeof(audio_control_cur_1_t)); + + mute[request->bChannelNumber] = ((audio_control_cur_1_t *)buf)->bCur; + + TU_LOG1("Set channel %d Mute: %d\r\n", request->bChannelNumber, mute[request->bChannelNumber]); + + return true; + } + else if (request->bControlSelector == AUDIO_FU_CTRL_VOLUME) + { + TU_VERIFY(request->wLength == sizeof(audio_control_cur_2_t)); + + volume[request->bChannelNumber] = ((audio_control_cur_2_t const *)buf)->bCur; + + TU_LOG1("Set channel %d volume: %d dB\r\n", request->bChannelNumber, volume[request->bChannelNumber] / 256); + + return true; + } + else + { + TU_LOG1("Feature unit set request not supported, entity = %u, selector = %u, request = %u\r\n", + request->bEntityID, request->bControlSelector, request->bRequest); + return false; + } +} + +//--------------------------------------------------------------------+ +// Application Callback API Implementations +//--------------------------------------------------------------------+ + +// Invoked when audio class specific get request received for an entity +bool tud_audio_get_req_entity_cb(uint8_t rhport, tusb_control_request_t const *p_request) +{ + audio_control_request_t *request = (audio_control_request_t *)p_request; + + if (request->bEntityID == UAC2_ENTITY_CLOCK) + return tud_audio_clock_get_request(rhport, request); + if (request->bEntityID == UAC2_ENTITY_SPK_FEATURE_UNIT) + return tud_audio_feature_unit_get_request(rhport, request); + else + { + TU_LOG1("Get request not handled, entity = %d, selector = %d, request = %d\r\n", + request->bEntityID, request->bControlSelector, request->bRequest); + } + return false; +} + +// Invoked when audio class specific set request received for an entity +bool tud_audio_set_req_entity_cb(uint8_t rhport, tusb_control_request_t const *p_request, uint8_t *buf) +{ + audio_control_request_t const *request = (audio_control_request_t const *)p_request; + + if (request->bEntityID == UAC2_ENTITY_SPK_FEATURE_UNIT) + return tud_audio_feature_unit_set_request(rhport, request, buf); + if (request->bEntityID == UAC2_ENTITY_CLOCK) + return tud_audio_clock_set_request(rhport, request, buf); + TU_LOG1("Set request not handled, entity = %d, selector = %d, request = %d\r\n", + request->bEntityID, request->bControlSelector, request->bRequest); + + return false; +} + +bool tud_audio_set_itf_close_EP_cb(uint8_t rhport, tusb_control_request_t const * p_request) +{ + (void)rhport; + + uint8_t const itf = tu_u16_low(tu_le16toh(p_request->wIndex)); + uint8_t const alt = tu_u16_low(tu_le16toh(p_request->wValue)); + + if (ITF_NUM_AUDIO_STREAMING_SPK == itf && alt == 0) + blink_interval_ms = BLINK_MOUNTED; + + return true; +} + +bool tud_audio_set_itf_cb(uint8_t rhport, tusb_control_request_t const * p_request) +{ + (void)rhport; + uint8_t const itf = tu_u16_low(tu_le16toh(p_request->wIndex)); + uint8_t const alt = tu_u16_low(tu_le16toh(p_request->wValue)); + + TU_LOG2("Set interface %d alt %d\r\n", itf, alt); + if (ITF_NUM_AUDIO_STREAMING_SPK == itf && alt != 0) + blink_interval_ms = BLINK_STREAMING; + + // Clear buffer when streaming format is changed + spk_data_size = 0; + if(alt != 0) + { + current_resolution = resolutions_per_format[alt-1]; + } + + return true; +} + +bool tud_audio_rx_done_pre_read_cb(uint8_t rhport, uint16_t n_bytes_received, uint8_t func_id, uint8_t ep_out, uint8_t cur_alt_setting) +{ + (void)rhport; + (void)func_id; + (void)ep_out; + (void)cur_alt_setting; + + spk_data_size = tud_audio_read(spk_buf, n_bytes_received); + return true; +} + +bool tud_audio_tx_done_pre_load_cb(uint8_t rhport, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting) +{ + (void)rhport; + (void)itf; + (void)ep_in; + (void)cur_alt_setting; + + // This callback could be used to fill microphone data separately + return true; +} + +//--------------------------------------------------------------------+ +// AUDIO Task +//--------------------------------------------------------------------+ + +void audio_task(void) +{ + // When new data arrived, copy data from speaker buffer, to microphone buffer + // and send it over + // Only support speaker & headphone both have the same resolution + // If one is 16bit another is 24bit be care of LOUD noise ! + if (spk_data_size) + { + if (current_resolution == 16) + { + int16_t *src = (int16_t*)spk_buf; + int16_t *limit = (int16_t*)spk_buf + spk_data_size / 2; + int16_t *dst = (int16_t*)mic_buf; + while (src < limit) + { + // Combine two channels into one + int32_t left = *src++; + int32_t right = *src++; + *dst++ = (left >> 1) + (right >> 1); + } + tud_audio_write((uint8_t *)mic_buf, spk_data_size / 2); + spk_data_size = 0; + } + else if (current_resolution == 24) + { + int32_t *src = spk_buf; + int32_t *limit = spk_buf + spk_data_size / 4; + int32_t *dst = mic_buf; + while (src < limit) + { + // Combine two channels into one + int32_t left = *src++; + int32_t right = *src++; + *dst++ = ((left >> 1) + (right >> 1)) & 0xffffff00; + } + tud_audio_write((uint8_t *)mic_buf, spk_data_size / 2); + spk_data_size = 0; + } + } +} + +//--------------------------------------------------------------------+ +// BLINKING TASK +//--------------------------------------------------------------------+ +void led_blinking_task(void) +{ + static uint32_t start_ms = 0; + static bool led_state = false; + + // Blink every interval ms + if (board_millis() - start_ms < blink_interval_ms) return; + start_ms += blink_interval_ms; + + board_led_write(led_state); + led_state = 1 - led_state; +} |