Suga koubou
echo sound see http://mbed.org/users/okini3939/notebook/I2S_TLV320AIC23B/
Dependencies: I2SSlave TLV320 mbed
Revision 0:68f7b69ecca0, committed 2012-11-23
- Comitter:
- okini3939
- Date:
- Fri Nov 23 08:24:10 2012 +0000
- Commit message:
- 1st build
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/I2SSlave.lib Fri Nov 23 08:24:10 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/d_worrall/code/I2SSlave/#aa3e863920d2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TLV320.lib Fri Nov 23 08:24:10 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/d_worrall/code/TLV320/#7e76c6f56169
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Nov 23 08:24:10 2012 +0000
@@ -0,0 +1,73 @@
+#include "mbed.h"
+#include "TLV320.h"
+
+#define BUF_SIZE 4000
+
+Serial pc(USBTX, USBRX);
+TLV320 audio(p9, p10, 0x34, p5, p6, p7, p8, p16); // I2S Codec
+DigitalOut myled(LED1);
+
+volatile int count = 0;
+int addr = 0;
+int buffer[BUF_SIZE];
+
+// interrupt TLV320 send/recv
+void isr_audio () {
+ int i, a;
+ short l, r, ll, rr;
+ int buf[4];
+
+ // I2S input
+ audio.read();
+ for (i = 0; i < 4; i ++) {
+ buf[i] = audio.rxBuffer[i];
+ }
+
+ for (i = 0; i < 4; i ++) {
+ l = (buffer[addr + i] >> 16);
+ r = (buffer[addr + i] & 0xffff);
+ ll = (buf[i] >> 16);
+ rr = (buf[i] & 0xffff);
+ l = (ll * 0.66) + (l * 0.33);
+ r = (rr * 0.66) + (r * 0.33);
+ buffer[addr + i] = buf[i];
+ buf[i] = (l << 16) | (r & 0xffff);
+ }
+ addr += 4;
+ if (addr >= BUF_SIZE) addr = 0;
+
+ audio.write(buf, 0, 4);
+
+ count ++;
+}
+
+int main() {
+ int time = 0;
+
+ pc.baud(115200);
+ memset(buffer, 0, sizeof(buffer));
+
+ audio.power(0x02); // mic off
+ audio.outputVolume(1, 1); // headphone off
+ audio.inputVolume(1, 1);
+ audio.frequency(44100);
+ audio.attach(&isr_audio);
+ audio.start(RECEIVE);
+ printf("Audio ready\r\n");
+
+ while (1) {
+ printf("%d / %d\r\n", time, count);
+ printf("L %04x / R %04x\r\n", (buffer[0] >> 16), (buffer[0] & 0xffff));
+ time ++;
+
+ myled = 1;
+ wait(0.5);
+ myled = 0;
+ wait(0.5);
+
+// if (pc.readable()) break;
+ }
+
+ audio.stop();
+ printf("exit\r\n");
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Nov 23 08:24:10 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/24d45a770a51 \ No newline at end of file