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USBAudioUDA1345
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Dependencies: I2S USBDevice mbed
Fork of
USBAudioPlayback
by 
Samuel Mokrani
Revision 0:eb53799c0b97, committed 2012-03-22
- Comitter:
- samux
- Date:
- Thu Mar 22 14:02:07 2012 +0000
- Child:
- 1:c22dae65898c
- Commit message:
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBDevice.lib Thu Mar 22 14:02:07 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/samux/code/USBDevice/#98311370c1eb
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Mar 22 14:02:07 2012 +0000
@@ -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;
+ }
+}
+
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Mar 22 14:02:07 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/737756e0b479