69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
#include "AudioTools.h"
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#include "AudioTools/Sandbox/USB/USBDeviceAudioAdafruit.h"
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size_t sample_count_mic = 0;
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size_t sample_count_spk = 0;
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// Microphone: generate data for USB
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size_t readCB(uint8_t* data, size_t len, USBDeviceAudio& ref) {
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int16_t* data16 = (int16_t*)data;
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size_t samples = len / sizeof(int16_t);
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size_t result = 0;
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// generate random stereo data
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for (int j = 0; j < samples; j+=2) {
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data16[j] = random(-32000, 32000);
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data16[j+1] = random(-32000, 32000);;
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result += sizeof(int16_t)*2;
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sample_count_mic += 2;
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}
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return result;
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}
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// Speaker: receive data from USB and write them to the final destination
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size_t writeCB(const uint8_t* data, size_t len, USBDeviceAudio & ref) {
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int16_t* data16 = (int16_t*)data;
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size_t samples = len / sizeof(int16_t);
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sample_count_spk += samples;
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return len;
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}
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auto config() {
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USBAudioConfig result;
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result.p_read_callback = readCB;
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result.p_write_callback = writeCB;
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return result;
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}
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USBDeviceAudioAdafruit usb{config()};
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void setup() {
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// Manual begin() is required on core without built-in support e.g. mbed rp2040
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if (!TinyUSBDevice.isInitialized()) {
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TinyUSBDevice.begin(0);
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}
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Serial.begin(115200);
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// If already enumerated, additional class driver begin() e.g msc, hid, midi won't take effect until re-enumeration
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if (TinyUSBDevice.mounted()) {
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TinyUSBDevice.detach();
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delay(10);
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TinyUSBDevice.attach();
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}
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}
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void loop() {
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#ifdef TINYUSB_NEED_POLLING_TASK
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// Manual call tud_task since it isn't called by Core's background
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TinyUSBDevice.task();
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#endif
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// use LED do display status
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if (usb.updateLED(LED_BUILTIN)){
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Serial.print("Total Microphone samples: ");
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Serial.print(sample_count_mic);
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Serial.print(" / Speaker samples: ");
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Serial.print(sample_count_spk);
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Serial.print(" / Sample rate: ");
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Serial.println(usb.rate());
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}
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} |