Samuel Mokrani / Mbed 2 deprecated USBAudio_micro

USBAudio example using a microphone

Dependencies:   USBDevice mbed

main.cpp@3:e6a29c83ac52, 2011-12-19 (annotated)

Committer:
samux
Date:
Mon Dec 19 15:46:17 2011 +0000
Revision:
3:e6a29c83ac52
Parent:
0:539ec61e1fbb
Child:
4:bef3b485f22e
ok we can send a music from an sdcard but readings are time to time slow...

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 0:539ec61e1fbb 1 #include "mbed.h"
samux 0:539ec61e1fbb 2 #include "USBAudio.h"
samux 3:e6a29c83ac52 3 #include "SDFileSystem.h"
samux 0:539ec61e1fbb 4
samux 0:539ec61e1fbb 5 extern "C" void HardFault_Handler() {
samux 0:539ec61e1fbb 6 error("Hard Fault!\n");
samux 0:539ec61e1fbb 7 }
samux 0:539ec61e1fbb 8
samux 0:539ec61e1fbb 9 USBAudio audio(8000, 1, 0x74ac, 0x8788);
samux 3:e6a29c83ac52 10 SDFileSystem sd(p5, p6, p7, p8, "sd"); // the pinout on the mbed Cool Components workshop board
samux 3:e6a29c83ac52 11 AnalogIn mic(p20);
samux 3:e6a29c83ac52 12 DigitalOut p(p21);
samux 0:539ec61e1fbb 13
samux 3:e6a29c83ac52 14 /* Wav file header data, for setting up the transfer protocol */
samux 3:e6a29c83ac52 15 short channels;
samux 3:e6a29c83ac52 16 long sampleRate;
samux 3:e6a29c83ac52 17 short wordWidth;
samux 3:e6a29c83ac52 18
samux 3:e6a29c83ac52 19 int16_t buf[8];
samux 0:539ec61e1fbb 20
samux 0:539ec61e1fbb 21 int main() {
samux 3:e6a29c83ac52 22 FILE * fp;
samux 3:e6a29c83ac52 23
samux 3:e6a29c83ac52 24 fp = fopen("/sd/3.wav", "r");
samux 3:e6a29c83ac52 25 if (fp == NULL) {
samux 3:e6a29c83ac52 26 error("Could not open file for write\n");
samux 0:539ec61e1fbb 27 }
samux 3:e6a29c83ac52 28
samux 3:e6a29c83ac52 29 printf("test\r\n");
samux 3:e6a29c83ac52 30 /* Parse wav file header */
samux 3:e6a29c83ac52 31 fseek(fp, 22, SEEK_SET);
samux 3:e6a29c83ac52 32 fread(&channels, 2, 1, fp);
samux 3:e6a29c83ac52 33 fseek(fp, 24, SEEK_SET);
samux 3:e6a29c83ac52 34 fread(&sampleRate, 4, 1, fp);
samux 3:e6a29c83ac52 35 fseek(fp, 34, SEEK_SET);
samux 3:e6a29c83ac52 36 fread(&wordWidth, 2, 1, fp);
samux 3:e6a29c83ac52 37
samux 0:539ec61e1fbb 38 while (1) {
samux 3:e6a29c83ac52 39 p = 1;
samux 3:e6a29c83ac52 40 for (int i = 0; i < 8; i++) {
samux 3:e6a29c83ac52 41 if (!feof(fp)) {
samux 3:e6a29c83ac52 42 fread(buf + i, 2, 1, fp);
samux 3:e6a29c83ac52 43 } else {
samux 3:e6a29c83ac52 44 fseek(fp, 36, SEEK_SET);
samux 3:e6a29c83ac52 45 }
samux 3:e6a29c83ac52 46 }
samux 3:e6a29c83ac52 47 p = 0;
samux 0:539ec61e1fbb 48 audio.write((uint8_t *)buf);
samux 0:539ec61e1fbb 49 }
samux 0:539ec61e1fbb 50 }