Diff: main.cpp

Revision:

0:ca6a20d158df

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Jun 16 15:19:38 2013 +0000
@@ -0,0 +1,36 @@
+/* Program Example 11.4 Wave file header reader
+                                                               */
+#include "mbed.h"
+#include "SDFileSystem.h"
+
+SDFileSystem sd(p5, p6, p7, p8, "sd");
+Serial pc(USBTX,USBRX);                       // set up terminal link
+char c1, c2, c3, c4;                          // chars for reading data in
+int AudioFormat, NumChannels, SampleRate, BitsPerSample ; 
+
+int main() {
+    pc.printf("\n\rWave file header reader\n\r");
+    FILE  *fp = fopen("/sd/sinewave.wav", "rb");    
+
+    fseek(fp, 20, SEEK_SET);                    // set pointer to byte 20   
+
+    fread(&AudioFormat, 2, 1, fp);              // check file is PCM
+    if (AudioFormat==0x01) {
+        pc.printf("Wav file is PCM data\n\r");
+    } 
+    else {
+        pc.printf("Wav file is not PCM data\n\r");
+    }
+
+    fread(&NumChannels, 2, 1, fp);              // find number of channels
+    pc.printf("Number of channels: %d\n\r",NumChannels);
+
+    fread(&SampleRate, 4, 1, fp);               // find sample rate
+    pc.printf("Sample rate: %d\n\r",SampleRate);
+
+    fread(&BitsPerSample, 2, 1, fp);            // find resolution
+    pc.printf("Bits per sample: %d\n\r",BitsPerSample);
+
+    fclose(fp);
+}
+