File content as of revision 0:1561c4efda0e:

#include "mbed.h"
#include <stdio.h>
#include "SDFileSystem.h"
#include "stm32f3xx_hal_rcc.h"
#include "cmsis_nvic.h"
#include "wavPlayer.h"

static void MX_TIM6_Init(void);
static void MX_NVIC_Init(void);
void TIM6_IRQHandler(void);
TIM_HandleTypeDef htim6;
Ticker flipper;
FATFS FatFs;
wavPlayerOnDAC wavPlayer(PA_4);
//AnalogOut DACout(PA_4);

SDFileSystem sd(PB_5, PB_4, PB_3, PA_11, "sd"); // the pinout on the mbed Cool Components workshop board
DigitalOut pin(PA_12);
DigitalOut pin2(PB_0);
DigitalIn button(PA_0,PullDown);
BusIn DipSW(PA_10,PA_9,PA_12,PB_0);


void TIM6_IRQHandler() {
    __HAL_TIM_CLEAR_IT(&htim6 , TIM_FLAG_UPDATE);
    wavPlayer.DACOutProc();
}


static void MX_NVIC_Init(void)
{
    /* TIM6_DAC1_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(TIM6_DAC1_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(TIM6_DAC1_IRQn);
}
/* TIM6 init function */
static void MX_TIM6_Init(void)
{
    __TIM6_CLK_ENABLE();
    htim6.Instance = TIM6;
    htim6.Init.Prescaler = 1;
    htim6.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim6.Init.Period = 1451;
    if (HAL_TIM_Base_Init(&htim6) != HAL_OK) {
        while(1) {
        }
    }
    HAL_TIM_Base_Start_IT(&htim6);
}


int main(void)
{
    FRESULT wavFileResult;
    FIL     fil;
    int     i,j;
    
    MX_TIM6_Init();
    NVIC_SetVector(TIM6_DAC1_IRQn, (uint32_t)&TIM6_IRQHandler);
    MX_NVIC_Init();
    
    DipSW.mode(PullDown);
    
    f_mount(&FatFs,"",0);
    wavFileResult = f_open(&fil, "LondonCalling.wav", FA_READ);
    printf("error:%d\r\n",(int)wavFileResult);
    wavPlayer.setFile(&fil);
    printf("buff ok\r\n");
    while(button == 1)
    {
    }
    printf("start\r\n");
    while(1) {

        if(wavPlayer.readProc() == 1)
        {
            printf("END\r\n");
            wavPlayer.rewind();
        }
    }
}