1 files changed, 40 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/tests/usb/device/audio/main.cpp b/tmk_core/tool/mbed/mbed-sdk/libraries/tests/usb/device/audio/main.cpp
new file mode 100644
index 000000000..e18891032
--- /dev/null
+++ b/tmk_core/tool/mbed/mbed-sdk/libraries/tests/usb/device/audio/main.cpp
@@ -0,0 +1,40 @@
+// Playback example with the USBAUDIO library
+
+#include "mbed.h"
+#include "USBAudio.h"
+
+// frequency: 48 kHz
+#define FREQ_SPK 48000
+#define FREQ_MIC 48000
+
+// 2channels: stereo
+#define NB_CHA_SPK 2
+#define NB_CHA_MIC 2
+
+// length computed: each ms, we receive 48 * 16bits ->48 * 2 bytes. as there are two channels, the length will be 48 * 2 * 2
+#define LENGTH_AUDIO_PACKET_SPK (FREQ_SPK / 500) * NB_CHA_SPK
+#define LENGTH_AUDIO_PACKET_MIC (FREQ_MIC / 500) * NB_CHA_MIC
+
+// USBAudio object
+USBAudio audio(FREQ_SPK, NB_CHA_SPK, FREQ_MIC, NB_CHA_MIC, 0xab45, 0x0378);
+
+int main() {
+    // buffer of int
+    int buf_in[LENGTH_AUDIO_PACKET_SPK/sizeof(int)];
+    int buf_out[LENGTH_AUDIO_PACKET_MIC/sizeof(int)];
+    int * stream_out = buf_in;
+    int * stream_in = buf_out;
+    int * tmp = NULL;
+
+    while (1) {
+        // read and write one audio packet each frame
+        audio.readWrite((uint8_t *)stream_in, (uint8_t *)stream_out);
+
+        // swap the buffers
+        tmp = stream_in;
+        stream_in = stream_out;
+        stream_out = tmp;
+    }
+}
+
+