[应用方案] NUC505播放SD卡内的MP3文件

/**************************************************************************//**

 * [url=home.php?mod=space&uid=288409]@file[/url]     main.c

 * [url=home.php?mod=space&uid=895143]@version[/url]  V2.1 

 * $Revision: 8 $

 * $Date: 16/01/09 3:40p $

 * [url=home.php?mod=space&uid=247401]@brief[/url]    A MP3 file player demo using internal audio codec used to playback MP3 file stored in SD card.

 *

 * @note

 * Copyright (C) 2016 Nuvoton Technology Corp. All rights reserved.

 *

 ******************************************************************************/

#include <stdio.h>

#include <string.h>

#include "NUC505Series.h"

#include "config.h"

#include "diskio.h"

#include "ff.h"



uint32_t volatile u32BuffPos = 0;



FATFS FatFs[_VOLUMES];               /* File system object for logical drive */



#ifdef __ICCARM__

#pragma data_alignment=32

BYTE Buff[16] ;                   /* Working buffer */

#endif



#ifdef __ARMCC_VERSION

__align(32) BYTE Buff[16] ;       /* Working buffer */

#endif



/*---------------------------------------------------------*/

/* User Provided RTC Function for FatFs module             */

/*---------------------------------------------------------*/

/* This is a real time clock service to be called from     */

/* FatFs module. Any valid time must be returned even if   */

/* the system does not support an RTC.                     */

/* This function is not required in read-only cfg.         */



unsigned long get_fattime (void)

{

    unsigned long tmr;



    tmr=0x00000;



    return tmr;

}



//---------------------------------------------------------

//--- Initial SD0 multi-function GPIO pin

//

// NUC505 support 3 groups of GPIO pins and SD sockets for same one SD port.

// Please select ONLY ONE configuration from them.

// 1. SD-A socket on daughter board + default SD0_Init(). (Default)

// 2. SD-B socket on main board + short JP3 and JP4

//    + define compile flag "SDH_GPIO_GB" in SD0_Init().

//    (Note: this configuration conflict with UART1)

// 3. SD-C socket on main board + short JP3 and JP2

//    + define compile flag "SDH_GPIO_GA" in SD0_Init()

//    (Note: this configuration conflict with UART0)

//---------------------------------------------------------

void SD0_Init(void)

{

#ifdef SDH_GPIO_GA

    // The group A are GPA10~11, GPA13~15, GPB0~1

    // Conflict with UART0

    // printf("SD_Open(): Configure GPIO group A as SDH pins.\n");

    SYS->GPA_MFPH &= (~0x77707700);

    SYS->GPA_MFPH |=   0x44404400;

    SYS->GPA_MFPH &= (~0x00000077);

    SYS->GPB_MFPL |=   0x00000044;



#elif defined SDH_GPIO_GB

    // The group B are GPB2~3, GPB5~9

    // Conflict with UART1

    // printf("SD_Open(): Configure GPIO group B as SDH pins.\n");

    SYS->GPB_MFPL &= (~0x77707700);

    SYS->GPB_MFPL |=   0x44404400;

    SYS->GPB_MFPH &= (~0x00000077);

    SYS->GPB_MFPH |=   0x00000044;



#elif defined SDH_GPIO_G_48PIN

    // The group 48PIN are GPB0~3, GPB5~7 for NUC505 48PIN chip

    // Conflict with both UART0 and UART1

    // printf("SD_Open(): Configure special GPIO as SDH pins for 48 pins NUC505 chip.\n");

    SYS->GPB_MFPL &= (~0x77707777);

    SYS->GPB_MFPL |=   0x44404444;



#else   // default for defined SDH_GPIO_GC

    // The group C are GPC0~2, GPC4~7

    // printf("SD_Open(): Configure GPIO group C as SDH pins.\n");

    SYS->GPC_MFPL &= (~0x77770777);

    SYS->GPC_MFPL |=   0x11110111;

#endif

}



void SYS_Init(void)

{



/*---------------------------------------------------------------------------------------------------------*/

/* Init System Clock                                                                                       */

/*---------------------------------------------------------------------------------------------------------*/

    /* Unlock protected registers */

    //SYS_UnlockReg();

     

    /* Enable  XTAL */

//    CLK->PWRCTL |= CLK_PWRCTL_HXTEN_Msk;



        CLK_SetCoreClock(100000000);

    

                /* PCLK divider */

                CLK_SetModuleClock(PCLK_MODULE, NULL, 1);

                

    /* Lock protected registers */

    //SYS_LockReg();



                //--- Initial SD0 multi-function pin

    SD0_Init();

}



void UART0_Init(void)

{

                /* Enable UART0 Module clock */

    CLK_EnableModuleClock(UART0_MODULE);

                /* UART0 module clock from EXT */

                CLK_SetModuleClock(UART0_MODULE, CLK_UART0_SRC_EXT, 0);

    /* Reset IP */

    SYS_ResetModule(UART0_RST);    

    /* Configure UART0 and set UART0 Baud-rate */

                UART_Open(UART0, 115200);

                /*---------------------------------------------------------------------------------------------------------*/

    /* Init I/O Multi-function                                                                                 */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Configure multi-function pins for UART0 RXD and TXD */

                SYS->GPB_MFPL  = (SYS->GPB_MFPL & (~SYS_GPB_MFPL_PB0MFP_Msk) ) | SYS_GPB_MFPL_PB0MFP_UART0_TXD;        

                SYS->GPB_MFPL  = (SYS->GPB_MFPL & (~SYS_GPB_MFPL_PB1MFP_Msk) ) | SYS_GPB_MFPL_PB1MFP_UART0_RXD;        

        

}



void I2S_Init(void)

{

                /* Enable I2S Module clock */

    CLK_EnableModuleClock(I2S_MODULE);

                /* I2S module clock from APLL */

        //FIXME APLL CLOCK

                // ideal clock is 49.152MHz, real clock is 49152031Hz

//        CLK_SET_APLL(CLK_APLL_49152031);        // APLL is 49152031Hz for 48000Hz

        CLK_SET_APLL(CLK_APLL_45158425);        // APLL is 45158425Hz for 44100Hz

        CLK_SetModuleClock(I2S_MODULE, CLK_I2S_SRC_APLL, 0);        // 0 means (APLL/1)

    /* Reset IP */

    SYS_ResetModule(I2S_RST);    

    /*---------------------------------------------------------------------------------------------------------*/

    /* Init I/O Multi-function                                                                                 */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Configure multi-function pins for I2S */

                // GPC[8]  = MCLK

                // GPC[9]  = DIN

                // GPC[10] = DOUT

                // GPC[11] = LRCLK

                // GPC[12] = BCLK

                SYS->GPC_MFPH  = (SYS->GPC_MFPH & (~SYS_GPC_MFPH_PC8MFP_Msk) ) | SYS_GPC_MFPH_PC8MFP_I2S_MCLK;        

                SYS->GPC_MFPH  = (SYS->GPC_MFPH & (~SYS_GPC_MFPH_PC9MFP_Msk) ) | SYS_GPC_MFPH_PC9MFP_I2S_DIN;        

                SYS->GPC_MFPH  = (SYS->GPC_MFPH & (~SYS_GPC_MFPH_PC10MFP_Msk) ) | SYS_GPC_MFPH_PC10MFP_I2S_DOUT;        

                SYS->GPC_MFPH  = (SYS->GPC_MFPH & (~SYS_GPC_MFPH_PC11MFP_Msk) ) | SYS_GPC_MFPH_PC11MFP_I2S_LRCLK;        

                SYS->GPC_MFPH  = (SYS->GPC_MFPH & (~SYS_GPC_MFPH_PC12MFP_Msk) ) | SYS_GPC_MFPH_PC12MFP_I2S_BCLK;        

        

}



/*---------------------------------------------------------------------------------------------------------*/

/*  Main Function                                                                                          */

/*---------------------------------------------------------------------------------------------------------*/

int32_t main (void)

{

    /* Init System, IP clock and multi-function I/O */

    SYS_Init();



    /* Init UART0 to 115200-8n1 for print message */

    UART0_Init();



    printf("+------------------------------------------------------------------------+\n");

    printf("|                   MP3 Player Sample with Internal CODEC                |\n");

    printf("+------------------------------------------------------------------------+\n");

    printf(" Please put MP3 files on SD card \n");



    printf("rc=%d\n", (WORD)disk_initialize(0));

    disk_read(0, Buff, 2, 1);

    //f_mount(0, &FatFs[0]);  // for FATFS v0.09

                // Register work area to the default drive

    f_mount(&FatFs[0], "", 0);  // for FATFS v0.11



        /* Init I2S, IP clock and multi-function I/O */

        I2S_Init();



    MP3Player();



    while(1);

}



/*** (C) COPYRIGHT 2015 Nuvoton Technology Corp. ***/