Revision 2:ce93bf118649, committed 2016-07-23

Comitter:

Grag38

Date:

Sat Jul 23 21:29:39 2016 +0000

Parent:

1:9ea0cc2fa567

Commit message:

This example project works with the LPC4088 QSB.; It reads a wav file from the sdcard (libs are in the EALib from Embedded Artist) and output it to the dac (TLV320 as RS-Audio board).; ; Hope it will helps who works with I2S with LPC4088

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EALib.lib	Sat Jul 23 21:29:39 2016 +0000
@@ -0,0 +1,1 @@
+https://mbed.org/users/embeddedartists/code/EALib/#e1e36493f347

--- a/FATFileSystem.lib	Fri Aug 05 10:12:21 2011 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-http://mbed.org/users/mbed_unsupported/code/fatfilesystem/
\ No newline at end of file

--- a/I2SSlave.lib	Fri Aug 05 10:12:21 2011 +0000
+++ b/I2SSlave.lib	Sat Jul 23 21:29:39 2016 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/d_worrall/code/I2SSlave/#aa3e863920d2
+https://developer.mbed.org/users/Grag38/code/I2SSlave/#ed59a9124517

--- a/SDHCFileSystem/SDHCFileSystem.cpp	Fri Aug 05 10:12:21 2011 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,495 +0,0 @@
-/* mbed SDFileSystem Library, for providing file access to SD cards
- * Copyright (c) 2008-2010, sford
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-/* Introduction
- * ------------
- * SD and MMC cards support a number of interfaces, but common to them all
- * is one based on SPI. This is the one I'm implmenting because it means
- * it is much more portable even though not so performant, and we already 
- * have the mbed SPI Interface!
- *
- * The main reference I'm using is Chapter 7, "SPI Mode" of: 
- *  http://www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf
- *
- * SPI Startup
- * -----------
- * The SD card powers up in SD mode. The SPI interface mode is selected by
- * asserting CS low and sending the reset command (CMD0). The card will 
- * respond with a (R1) response.
- *
- * CMD8 is optionally sent to determine the voltage range supported, and 
- * indirectly determine whether it is a version 1.x SD/non-SD card or 
- * version 2.x. I'll just ignore this for now.
- *
- * ACMD41 is repeatedly issued to initialise the card, until "in idle"
- * (bit 0) of the R1 response goes to '0', indicating it is initialised.
- *
- * You should also indicate whether the host supports High Capicity cards,
- * and check whether the card is high capacity - i'll also ignore this
- *
- * SPI Protocol
- * ------------
- * The SD SPI protocol is based on transactions made up of 8-bit words, with
- * the host starting every bus transaction by asserting the CS signal low. The
- * card always responds to commands, data blocks and errors.
- * 
- * The protocol supports a CRC, but by default it is off (except for the 
- * first reset CMD0, where the CRC can just be pre-calculated, and CMD8)
- * I'll leave the CRC off I think! 
- * 
- * Standard capacity cards have variable data block sizes, whereas High 
- * Capacity cards fix the size of data block to 512 bytes. I'll therefore
- * just always use the Standard Capacity cards with a block size of 512 bytes.
- * This is set with CMD16.
- *
- * You can read and write single blocks (CMD17, CMD25) or multiple blocks 
- * (CMD18, CMD25). For simplicity, I'll just use single block accesses. When
- * the card gets a read command, it responds with a response token, and then 
- * a data token or an error.
- * 
- * SPI Command Format
- * ------------------
- * Commands are 6-bytes long, containing the command, 32-bit argument, and CRC.
- *
- * +---------------+------------+------------+-----------+----------+--------------+
- * | 01 | cmd[5:0] | arg[31:24] | arg[23:16] | arg[15:8] | arg[7:0] | crc[6:0] | 1 |
- * +---------------+------------+------------+-----------+----------+--------------+
- *
- * As I'm not using CRC, I can fix that byte to what is needed for CMD0 (0x95)
- *
- * All Application Specific commands shall be preceded with APP_CMD (CMD55).
- *
- * SPI Response Format
- * -------------------
- * The main response format (R1) is a status byte (normally zero). Key flags:
- *  idle - 1 if the card is in an idle state/initialising 
- *  cmd  - 1 if an illegal command code was detected
- *
- *    +-------------------------------------------------+
- * R1 | 0 | arg | addr | seq | crc | cmd | erase | idle |
- *    +-------------------------------------------------+
- *
- * R1b is the same, except it is followed by a busy signal (zeros) until
- * the first non-zero byte when it is ready again.
- *
- * Data Response Token
- * -------------------
- * Every data block written to the card is acknowledged by a byte 
- * response token
- *
- * +----------------------+
- * | xxx | 0 | status | 1 |
- * +----------------------+
- *              010 - OK!
- *              101 - CRC Error
- *              110 - Write Error
- *
- * Single Block Read and Write
- * ---------------------------
- *
- * Block transfers have a byte header, followed by the data, followed
- * by a 16-bit CRC. In our case, the data will always be 512 bytes.
- *  
- * +------+---------+---------+- -  - -+---------+-----------+----------+
- * | 0xFE | data[0] | data[1] |        | data[n] | crc[15:8] | crc[7:0] | 
- * +------+---------+---------+- -  - -+---------+-----------+----------+
- */
- 
- /*
- * Comment: Changes for SDHC support till 32GB 
- * Name:    KB
- * Date:    07/24/2010
- * Release: 0.1
- */
- 
-#include "SDHCFileSystem.h"
-
-#define DEBUG
-#define SD_COMMAND_TIMEOUT 5000
-
-
-SDFileSystem::SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name) :
-  FATFileSystem(name), _spi(mosi, miso, sclk), _cs(cs) {
-      _cs = 1; 
-}
-
-#define R1_IDLE_STATE           (1 << 0)
-#define R1_ERASE_RESET          (1 << 1)
-#define R1_ILLEGAL_COMMAND      (1 << 2)
-#define R1_COM_CRC_ERROR        (1 << 3)
-#define R1_ERASE_SEQUENCE_ERROR (1 << 4)
-#define R1_ADDRESS_ERROR        (1 << 5)
-#define R1_PARAMETER_ERROR      (1 << 6)
-
-// Types
-//  - v1.x Standard Capacity
-//  - v2.x Standard Capacity
-//  - v2.x High Capacity
-//  - Not recognised as an SD Card
-
-#define SDCARD_FAIL 0
-#define SDCARD_V1   1
-#define SDCARD_V2   2
-#define SDCARD_V2HC 3
-
-int SDFileSystem::initialise_card() {
-    // Set to 100kHz for initialisation, and clock card with cs = 1
-    _spi.frequency(100000); 
-    _cs = 1;
-    for(int i=0; i<16; i++) {   
-        _spi.write(0xFF);
-    }
-
-    // send CMD0, should return with all zeros except IDLE STATE set (bit 0)
-    if(_cmd(0, 0) != R1_IDLE_STATE) { 
-        fprintf(stderr, "No disk, or could not put SD card in to SPI idle state\n");
-        return SDCARD_FAIL;
-    }
-
-    // send CMD8 to determine whther it is ver 2.x
-    int r = _cmd8();
-    if(r == R1_IDLE_STATE) {
-        return initialise_card_v2();
-    } else if(r == (R1_IDLE_STATE | R1_ILLEGAL_COMMAND)) {
-        return initialise_card_v1();
-    } else {
-        fprintf(stderr, "Not in idle state after sending CMD8 (not an SD card?)\n");
-        return SDCARD_FAIL;
-    }
-}
-
-int SDFileSystem::initialise_card_v1() {
-    for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
-        _cmd(55, 0); 
-        if(_cmd(41, 0) == 0) { 
-            cdv = 512;
-            #ifdef DEBUG 
-            printf("\n\rInit: SEDCARD_V1\n\r");
-            #endif
-            return SDCARD_V1;
-        }
-    }
-
-    fprintf(stderr, "Timeout waiting for v1.x card\n");
-    return SDCARD_FAIL;
-}
-
-int SDFileSystem::initialise_card_v2() {
-    
-    for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
-        wait_ms(50);
-        _cmd58();
-        _cmd(55, 0); 
-        if(_cmd(41, 0x40000000) == 0) { 
-            _cmd58();
-            #ifdef DEBUG
-            printf("\n\rInit: SDCARD_V2\n\r");
-            #endif
-            cdv = 1;
-            return SDCARD_V2;
-        }
-    }
-
-    fprintf(stderr, "Timeout waiting for v2.x card\n");
-    return SDCARD_FAIL;
-}
-
-int SDFileSystem::disk_initialize() {
-
-    int i = initialise_card();
-    #ifdef DEBUG 
-    printf("init card = %d\n", i);
-    #endif
-    _sectors = _sd_sectors();
-
-    // Set block length to 512 (CMD16)
-    if(_cmd(16, 512) != 0) {
-        fprintf(stderr, "Set 512-byte block timed out\n");
-        return 1;
-    }
-        
-    _spi.frequency(20000000); // Set to 1MHz for data transfer
-    return 0;
-}
-
-int SDFileSystem::disk_write(const char *buffer, int block_number) {
-    // set write address for single block (CMD24)
-    if(_cmd(24, block_number * cdv) != 0) {
-        return 1;
-    }
-
-    // send the data block
-    _write(buffer, 512);    
-    return 0;    
-}
-
-int SDFileSystem::disk_read(char *buffer, int block_number) {        
-    // set read address for single block (CMD17)
-    if(_cmd(17, block_number * cdv) != 0) {
-        return 1;
-    }
-    
-    // receive the data
-    _read(buffer, 512);
-    return 0;
-}
-
-int SDFileSystem::disk_status() { return 0; }
-int SDFileSystem::disk_sync() { return 0; }
-int SDFileSystem::disk_sectors() { return _sectors; }
-
-// PRIVATE FUNCTIONS
-
-int SDFileSystem::_cmd(int cmd, int arg) {
-    _cs = 0; 
-
-    // send a command
-    _spi.write(0x40 | cmd);
-    _spi.write(arg >> 24);
-    _spi.write(arg >> 16);
-    _spi.write(arg >> 8);
-    _spi.write(arg >> 0);
-    _spi.write(0x95);
-
-    // wait for the repsonse (response[7] == 0)
-    for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
-        int response = _spi.write(0xFF);
-        if(!(response & 0x80)) {
-            _cs = 1;
-            _spi.write(0xFF);
-            return response;
-        }
-    }
-    _cs = 1;
-    _spi.write(0xFF);
-    return -1; // timeout
-}
-int SDFileSystem::_cmdx(int cmd, int arg) {
-    _cs = 0; 
-
-    // send a command
-    _spi.write(0x40 | cmd);
-    _spi.write(arg >> 24);
-    _spi.write(arg >> 16);
-    _spi.write(arg >> 8);
-    _spi.write(arg >> 0);
-    _spi.write(0x95);
-
-    // wait for the repsonse (response[7] == 0)
-    for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
-        int response = _spi.write(0xFF);
-        if(!(response & 0x80)) {
-            return response;
-        }
-    }
-    _cs = 1;
-    _spi.write(0xFF);
-    return -1; // timeout
-}
-
-
-int SDFileSystem::_cmd58() {
-    _cs = 0; 
-    int arg = 0;
-    
-    // send a command
-    _spi.write(0x40 | 58);
-    _spi.write(arg >> 24);
-    _spi.write(arg >> 16);
-    _spi.write(arg >> 8);
-    _spi.write(arg >> 0);
-    _spi.write(0x95);
-
-    // wait for the repsonse (response[7] == 0)
-    for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
-        int response = _spi.write(0xFF);
-        if(!(response & 0x80)) {
-            int ocr = _spi.write(0xFF) << 24;
-            ocr |= _spi.write(0xFF) << 16;
-            ocr |= _spi.write(0xFF) << 8;
-            ocr |= _spi.write(0xFF) << 0;
-//            printf("OCR = 0x%08X\n", ocr);
-            _cs = 1;
-            _spi.write(0xFF);
-            return response;
-        }
-    }
-    _cs = 1;
-    _spi.write(0xFF);
-    return -1; // timeout
-}
-
-int SDFileSystem::_cmd8() {
-    _cs = 0; 
-    
-    // send a command
-    _spi.write(0x40 | 8); // CMD8
-    _spi.write(0x00);     // reserved
-    _spi.write(0x00);     // reserved
-    _spi.write(0x01);     // 3.3v
-    _spi.write(0xAA);     // check pattern
-    _spi.write(0x87);     // crc
-
-    // wait for the repsonse (response[7] == 0)
-    for(int i=0; i<SD_COMMAND_TIMEOUT * 1000; i++) {
-        char response[5];
-        response[0] = _spi.write(0xFF);
-        if(!(response[0] & 0x80)) {
-                for(int j=1; j<5; j++) {
-                    response[i] = _spi.write(0xFF);
-                }
-                _cs = 1;
-                _spi.write(0xFF);
-                return response[0];
-        }
-    }
-    _cs = 1;
-    _spi.write(0xFF);
-    return -1; // timeout
-}
-
-int SDFileSystem::_read(char *buffer, int length) {
-    _cs = 0;
-
-    // read until start byte (0xFF)
-    while(_spi.write(0xFF) != 0xFE);
-
-    // read data
-    for(int i=0; i<length; i++) {
-        buffer[i] = _spi.write(0xFF);
-    }
-    _spi.write(0xFF); // checksum
-    _spi.write(0xFF);
-
-    _cs = 1;    
-    _spi.write(0xFF);
-    return 0;
-}
-
-int SDFileSystem::_write(const char *buffer, int length) {
-    _cs = 0;
-    
-    // indicate start of block
-    _spi.write(0xFE);
-    
-    // write the data
-    for(int i=0; i<length; i++) {
-        _spi.write(buffer[i]);
-    }
-    
-    // write the checksum
-    _spi.write(0xFF); 
-    _spi.write(0xFF);
-
-    // check the repsonse token
-    if((_spi.write(0xFF) & 0x1F) != 0x05) {
-        _cs = 1;
-        _spi.write(0xFF);        
-        return 1;
-    }
-
-    // wait for write to finish
-    while(_spi.write(0xFF) == 0);
-
-    _cs = 1; 
-    _spi.write(0xFF);
-    return 0;
-}
-
-static int ext_bits(char *data, int msb, int lsb) {
-    int bits = 0;
-    int size = 1 + msb - lsb; 
-    for(int i=0; i<size; i++) {
-        int position = lsb + i;
-        int byte = 15 - (position >> 3);
-        int bit = position & 0x7;
-        int value = (data[byte] >> bit) & 1;
-        bits |= value << i;
-    }
-    return bits;
-}
-
-int SDFileSystem::_sd_sectors() {
-
-    int c_size, c_size_mult, read_bl_len;
-    int block_len, mult, blocknr, capacity;       
-    int blocks, hc_c_size;
-    uint64_t hc_capacity;
-     
-    // CMD9, Response R2 (R1 byte + 16-byte block read)
-    if(_cmdx(9, 0) != 0) {
-        fprintf(stderr, "Didn't get a response from the disk\n");
-        return 0;
-    }
-    
-    char csd[16];    
-    if(_read(csd, 16) != 0) {
-        fprintf(stderr, "Couldn't read csd response from disk\n");
-        return 0;
-    }
-
-    // csd_structure : csd[127:126]
-    // c_size        : csd[73:62]
-    // c_size_mult   : csd[49:47]
-    // read_bl_len   : csd[83:80] - the *maximum* read block length
-   
-    int csd_structure = ext_bits(csd, 127, 126);
-    
-    #ifdef DEBUG 
-    printf("\n\rCSD_STRUCT = %d\n", csd_structure);
-    #endif
-     
-    switch (csd_structure){
-     case 0:
-      cdv = 512;
-      c_size = ext_bits(csd, 73, 62);
-      c_size_mult = ext_bits(csd, 49, 47);
-      read_bl_len = ext_bits(csd, 83, 80);
-     
-      block_len = 1 << read_bl_len;
-      mult = 1 << (c_size_mult + 2);
-      blocknr = (c_size + 1) * mult;
-      capacity = blocknr * block_len;
-      blocks = capacity / 512;
-      #ifdef DEBUG 
-      printf("\n\rSDCard\n\rc_size: %.4X \n\rcapacity: %.ld \n\rsectors: %d\r\n", c_size, capacity, blocks);
-      #endif
-      break;
-    
-     case 1:
-      cdv = 1;
-      hc_c_size = ext_bits(csd, 63, 48);
-      int hc_read_bl_len = ext_bits(csd, 83, 80);
-      hc_capacity = hc_c_size+1;   
-      blocks = (hc_c_size+1)*1024;
-      #ifdef DEBUG 
-      printf("\n\rSDHC Card \n\rhc_c_size: %.4X \n\rcapacity: %.lld \n\rsectors: %d\r\n", hc_c_size, hc_capacity*512*1024, blocks);
-      #endif
-      break;
-   
-    default:    
-       fprintf(stderr, "This disk tastes funny! I only know about type 0 CSD structures\n");
-     return 0;
-     //break;
-    };
- return blocks;
-}

--- a/SDHCFileSystem/SDHCFileSystem.h	Fri Aug 05 10:12:21 2011 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,86 +0,0 @@
-/* mbed SDFileSystem Library, for providing file access to SD cards
- * Copyright (c) 2008-2010, sford
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#ifndef MBED_SDHCFILESYSTEM_H
-#define MBED_SDHCFILESYSTEM_H
-
-#include "mbed.h"
-#include "FATFileSystem.h"
-
-/* Double Words */
-typedef unsigned long long uint64_t;
-typedef long long sint64_t;
-
-/** Access the filesystem on an SD Card using SPI
- *
- * @code
- * #include "mbed.h"
- * #include "SDFileSystem.h"
- *
- * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs
- *  
- * int main() {
- *     FILE *fp = fopen("/sd/myfile.txt", "w");
- *     fprintf(fp, "Hello World!\n");
- *     fclose(fp);
- * }
- */
-class SDFileSystem : public FATFileSystem {
-public:
-
-    /** Create the File System for accessing an SD Card using SPI
-     *
-     * @param mosi SPI mosi pin connected to SD Card
-     * @param miso SPI miso pin conencted to SD Card
-     * @param sclk SPI sclk pin connected to SD Card
-     * @param cs   DigitalOut pin used as SD Card chip select
-     * @param name The name used to access the virtual filesystem
-     */
-    SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name);
-    virtual int disk_initialize();
-    virtual int disk_write(const char *buffer, int block_number);
-    virtual int disk_read(char *buffer, int block_number);    
-    virtual int disk_status();
-    virtual int disk_sync();
-    virtual int disk_sectors();
-
-protected:
-
-    int _cmd(int cmd, int arg);
-    int _cmdx(int cmd, int arg);
-    int _cmd8();
-    int _cmd58();
-    int initialise_card();
-    int initialise_card_v1();
-    int initialise_card_v2();
-    
-    int _read(char *buffer, int length);
-    int _write(const char *buffer, int length);
-    int _sd_sectors();
-    int _sectors;
-    
-    SPI _spi;
-    DigitalOut _cs; 
-    int cdv;    
-};
-
-#endif

--- a/TLV320.lib	Fri Aug 05 10:12:21 2011 +0000
+++ b/TLV320.lib	Sat Jul 23 21:29:39 2016 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/d_worrall/code/TLV320/#7e76c6f56169
+http://mbed.org/users/okini3939/code/TLV320/#318580ea8edd

--- a/main.cpp	Fri Aug 05 10:12:21 2011 +0000
+++ b/main.cpp	Sat Jul 23 21:29:39 2016 +0000
@@ -1,9 +1,267 @@
 #include "mbed.h"
-#include "SDHCFileSystem.h"
 #include "TLV320.h"
+
+Serial pc(USBTX, USBRX);
  
-TLV320 audio(p9, p10, 52, p5, p6, p7, p8, p29); //TLV320 object
-SDFileSystem sd(p11, p12, p13, p14, "sd");      //SD Card object
+/******************************************************************************
+ * Includes
+ *****************************************************************************/
+#include "MCIFileSystem.h"
+
+/******************************************************************************
+ * Typedefs and defines
+ *****************************************************************************/
+
+typedef bool (*syncFunc)(const char* name, bool isDir);
+
+/******************************************************************************
+ * Local variables
+ *****************************************************************************/
+
+MCIFileSystem mcifs("mci");
+
+DigitalOut myled1(LED1);
+DigitalOut myled2(LED2);
+
+/******************************************************************************
+ * Local functions
+ *****************************************************************************/
+
+static void ledShowProgress()
+{
+  static int state = 0;
+  state = (state + 1) % 2;
+  switch (state)
+  {
+    case 0:
+      myled1 = 1;
+      myled2 = 0;
+      break;
+
+    case 1:
+    default:
+      myled1 = 0;
+      myled2 = 1;
+  }
+}
+
+static void handleError(const char* msg)
+{
+  printf(msg);
+  while(true) {
+    myled1 = 1;
+    myled2 = 1;
+    wait(0.3);
+    myled1 = 0;
+    myled2 = 0;
+    wait(0.3);
+  }
+}
+
+static bool recursiveProcessFS(char* buff, const char* name, syncFunc func, bool adding)
+{
+  uint32_t len = strlen(buff);
+  if (len > 0) {
+    if (buff[len - 1] != '/') {
+      buff[len++] = '/';
+      buff[len] = '\0';
+    }
+  }
+  strcat(buff, name);
+  len += strlen(name);
+  
+  if (len > 60) {
+    // ugly fix to avoid crashes that occurs when file name is larger than buffer 
+    // in FATFileSystem.
+    printf("skipped:   %s\n", buff);
+    return true;
+  }
+
+  DIR *d = opendir(buff);
+  bool result = true; // success
+  if (d != NULL) {
+    if (adding) {
+      // when processing in adding mode folders must be created before it's content
+      result = func(buff, true);
+    }
+    struct dirent *p;
+    while (result && ((p = readdir(d)) != NULL)) {
+      result = recursiveProcessFS(buff, p->d_name, func, adding);
+      buff[len] = '\0';
+    }
+    closedir(d);
+    if (result && !adding) {
+      // when processing in removing mode folders must be deleted after it's content
+      result = func(buff, true);
+    }
+  } else {
+    // a file
+    result = func(buff, false);
+  }
+  return result;
+}
+
+static uint32_t fileLen(FILE* f)
+{
+  uint32_t pos = ftell(f);
+  fseek(f, 0, SEEK_END);
+  uint32_t size = ftell(f);
+  fseek(f, pos, SEEK_SET);
+  return size;
+}
+
+static bool copyFH(FILE* fSrc, FILE* fDst)
+{
+  char buff[512];
+  uint32_t left = fileLen(fSrc);
+  uint32_t num;
+  uint32_t chunk;
+
+  fseek(fSrc, 0, SEEK_SET);
+  do {
+    chunk = (left < 512) ? left : 512;
+    num = fread(buff, 1, chunk, fSrc);
+    if (num > 0) {
+      uint32_t tmp = fwrite(buff, 1, num, fDst);
+      if (tmp != num) {
+        // failed to write
+        return false;
+      }
+      left -= num;
+      ledShowProgress();
+    }
+  } while(num > 0 && left > 0);
+
+  // copied entire file
+  return true;
+}
+
+static bool copy(const char* fnameSrc, const char* fnameDest)
+{
+  FILE* fhSrc = NULL;
+  FILE* fhDest = NULL;
+  bool success = false;
+  
+  do {
+    fhSrc = fopen(fnameSrc, "r");
+    if (fhSrc == NULL) {
+      break;
+    }
+    
+    fhDest = fopen(fnameDest, "w");
+    if (fhDest == NULL) {
+      break;
+    }
+    
+    if (!copyFH(fhSrc, fhDest)) {
+      break;
+    }
+    
+    success = true;
+  } while (false);
+  
+  if (fhSrc != NULL) {
+    fclose(fhSrc);
+  }
+  if (fhDest != NULL) {
+    fclose(fhDest);
+  }
+  
+  return success;
+}
+
+static bool list(const char* name, bool isDir)
+{
+  if (isDir) {
+    printf("d:         %s\n", name);
+  } else {
+    FILE* f = fopen(name, "r");
+    if (f != NULL) {
+      uint32_t len = fileLen(f);
+      printf("f: %7u %s\n", len, name);
+      fclose(f);
+    } else {
+      printf("f:     ??? %s\n", name);
+    }
+  }
+  return true;
+}
+
+static void recursiveList(const char* dirname)
+{
+  printf("\nRecursive list of file and folders in %s\n", dirname);
+  char* buff = (char*)malloc(512);
+  if (buff != NULL)
+  {
+    buff[0] = '\0';
+    recursiveProcessFS(buff, dirname, list, true);
+    free(buff);
+  }
+}
+
+static void testAppend(const char* filename)
+{
+    FILE *fp = fopen(filename, "a");
+    if (fp != NULL) {
+        fprintf(fp, "Hello World!");
+        fclose(fp);
+    }
+}
+
+/******************************************************************************
+ * TestSdCard function
+ *****************************************************************************/
+
+int TestSdCard()
+{
+  printf("\n-----------------\n\nWelcome to the MCI file system example...\n");
+  
+  if (!mcifs.cardInserted()) {
+    printf("Please insert a SD/MMC card...\n");
+    while (!mcifs.cardInserted()) {
+      wait(0.5);
+    }
+    printf("Card detected!\n");
+  }
+
+  recursiveList("/mci/");
+
+  copy("/mci/expanding.txt", "/mci/expanding.old");
+  testAppend("/mci/expanding.txt");
+
+  //recursiveList("/mci/");
+  
+  
+      
+      printf("Found SD/MMC card, writing to /mci/myfile.txt ...\n");
+      
+      Timer t;
+      
+      t.start();
+      
+      FILE *fp = fopen("/mci/myfile.txt", "w");
+      if (fp != NULL) 
+      {
+          for (long i=0; i<100000L; i++)
+          fprintf(fp, "Hello World!\n");
+          fclose(fp);
+          printf("Wrote to /mci/myfile.txt\n");
+      } else {
+          printf("Failed to open /mci/myfile.txt\n");
+      }
+    t.stop();
+    
+     printf("The time taken was %f seconds\n", t.read());
+    
+  
+  handleError("Program completed!\n");  
+  return 1;
+}
+
+ 
+ 
+TLV320 audio(p9, p10, 52, p11, p12, p13, p14, p16); //TLV320 object
+
 InterruptIn volumeSet(p17);                     
 AnalogIn aIn(p19); 
 FILE *infp;                                     //File pointer object
@@ -41,8 +299,11 @@
     }
 }
 /* main */
-int main(){   
-    infp = fopen("/sd/test.wav", "r");      //open file
+int main()
+{
+    pc.baud(460800);
+       
+    infp = fopen("/mci/agnes.wav","rb");
         if(infp == NULL){                   //make sure it's been opened
         perror("Error opening file!");
         exit(1);

--- a/mbed.bld	Fri Aug 05 10:12:21 2011 +0000
+++ b/mbed.bld	Sat Jul 23 21:29:39 2016 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/mbed/builds/63bcd7ba4912
+http://mbed.org/users/mbed_official/code/mbed/builds/6c34061e7c34
\ No newline at end of file