File content as of revision 10:5f6fc7dc119b:

#include "mbed.h"
#include "SDFileSystemDMA.h"

/* SD card Interface connection
 *           :  aitendo   :  General
 *  MCU sig. : IFB-254-SD :  PIN name
     ---     :    1       :   9 dat2
       CS    :    2       :   1 cs/dat3
      MOSI   :    3       :   2 di/cmd
       GND   :    4       :   3 vss1
       VCC   :    5       :   4 vdd
       CLK   :    6       :   5 clk
       GND   :    7       :   6 vss2
      MISO   :    8       :   7 do/dat0
       ---   :    9       :   8 dat1
       ---   :   10       :  11 wp
       ---   :   11       :  10 cd1
       ---   :   12       :  - case GND
*/

/* You should confirm SPI_DEV macro in "spi_device.h" to specify SPI device number.
 * (default is 1 (SPI1))
 */
#include "spi_device.h"

#define UART_KEY_PRESS  1

#define SPI_CLOCK_HZ    ( 12 * 1000000 ) 
Timer timer;
Serial pc(USBTX,USBRX);

SDFileSystem sd( MOSI, MISO, SCLK, CS, "sd", SPI_CLOCK_HZ);  

char buffer[512];
#define X_MEGA_BYTE     ((1)*1024*1024) /* 1Mbyte */
#define FILE_NAME   "GPATH"
void wait_key_press(){
#if UART_KEY_PRESS
    pc.printf("\n-- Select 'r' or 'w' --\n");  
    fflush(stdout); 
    while(!pc.readable());
    volatile int res = pc.getc();
#else

#endif
}

void writeTest()
{
    //Test write performance by creating a 1MB file
    pc.printf("[Write]: Testing %dByte buffer: write performance...", sizeof(buffer));
    fflush(stdout); 
    FileHandle* file = sd.open(FILE_NAME, O_WRONLY | O_CREAT | O_TRUNC);
    if (file != NULL) {
        timer.start();
        for (uint32_t i = 0; i < (X_MEGA_BYTE / sizeof(buffer)); i++) {
            if (file->write(buffer, sizeof(buffer)) != sizeof(buffer)) {
                timer.stop();
                pc.printf("write error!\n");
                timer.reset();
                return;
            }
        }
        timer.stop();
        if (file->close())
            pc.printf("failed to close file!\n");
        else{
            pc.printf("done!\n\tResult: %d KB/s\n", (  1024 * 1000000 ) / timer.read_us() );
        }
        timer.reset();
    } else {
        pc.printf("failed to create file!\n");
    }
}


void readTest()
{
    //Test read performance by reading the 1MB file created by writeTest()
    pc.printf("[Read]: Testing %dByte buffer: read performance...", sizeof(buffer));
    fflush(stdout); 
    FileHandle* file = sd.open(FILE_NAME, O_RDONLY);
    if (file != NULL) {
        timer.start();
        int iterations = 0;
        while (file->read(buffer, sizeof(buffer)) == sizeof(buffer))
            iterations++;
        timer.stop();
        if (iterations != (X_MEGA_BYTE / sizeof(buffer))){
            pc.printf("read error!\n");
                }
        else if (file->close()){
            pc.printf("failed to close file!\n");
                }
       // else if (sd.remove(FILE_NAME))
       //     pc.printf("failed to delete file!\n");
        else{
            pc.printf("done!\n\tResult: %d KB/s\n",  (  1024 * 1000000 ) / timer.read_us());
        }
        timer.reset();
    } else {
        pc.printf("failed to open file!\n");
    }
}

int main(){
    /* UART Baudrate is 9600bps*/
	while(1){
		pc.printf("\nSysClock= %d Hz", SystemCoreClock);
		pc.printf("   mbed rev.%d", MBED_LIBRARY_VERSION);
		pc.printf("\nStart SD card accsess test!");
		pc.printf("\n  SPI(%d) device",SPI_DEV);
		pc.printf("\n[r]: Start Read Test. At least execute [w] onece");
		pc.printf("\n[w]: Start Write and Read Test");
		pc.printf("\nWriting is very slow, wait tens of seconds."); 
		pc.printf("\n-- Select [r] or [w] --\n");  
		fflush(stdout); 
		while(!pc.readable());
		char ch = pc.getc();
		if( ch =='r' ){
			readTest();
		} else if( ch =='w' ){
			writeTest();
			readTest();
		}
	}
}