Micro SD card related functions. More...

#include "cleon_conf.h"
#include "app_define.h"
#include "sys_define.h"
#include "hal_define.h"
#include "fs_define.h"

Include dependency graph for sys_mmc.c:

Go to the source code of this file.

Functions
void	SYS_MMC_Init (void)
	Initializing microcontroller.

void	SYS_MMC_InitIO (void)
	Initializing Micro SD interface pins.

void	SYS_MMC_FastMode (void)
	Enable fast SD card SPI transfer.

void	SYS_MMC_ReadFrame (unsigned char *ptrucBuffer, unsigned int uiSize)
	Read a frame of bytes via SPI.

void	SYS_MMC_SendFrame (unsigned char *ptrucBuffer, unsigned int uiSize)
	Send a frame of bytes via SPI.

void	SYS_MMC_DeselectCard (void)
	Set the SD Card's chip-select signal to high.

void	SYS_MMC_SelectCard (void)
	Set the SD Card's chip-select signal to low.

Variables
FATFS	Fatfs

FIL	fileObject

bool	bFLAG_MicroSDInserted = _CLEAR_

Detailed Description

Micro SD card related functions.

Definition in file sys_mmc.c.

Function Documentation

void SYS_MMC_DeselectCard ( void )

Set the SD Card's chip-select signal to high.

Returns: void

Parameters

void

Definition at line 174 of file sys_mmc.c.

{
    MICROSD_CS_PORT(OUT) |=  BV(MICROSD_CS_PIN);
}

void SYS_MMC_FastMode ( void )

Enable fast SD card SPI transfer.

Returns: void

Parameters

void

Definition at line 99 of file sys_mmc.c.

{
    UCB1CTL1 |= UCSWRST;    // Put state machine in reset
    UCB1BR0 = 2;            // f_UCxCLK = 12MHz/2 = 6MHz
    UCB1BR1 = 0;    
    UCB1CTL1 &= ~UCSWRST;   // Release USCI state machine
}

void SYS_MMC_Init ( void )

Initializing microcontroller.

Returns: void

Parameters

void

Definition at line 28 of file sys_mmc.c.

{ 
    SYS_MMC_InitIO();
    
    // Check if MicroSD is inserted
    if(SYS_MMC_IsMicroSDInserted() == _SET_){
        bFLAG_MicroSDInserted = _SET_;
        
#if SYS_MMC_LED_INDICATION_FOR_ERROR == _ENABLE_      
        MICRO_SD_ERROR_LED_OFF();
#endif                
        
        // Initializing file system
        FS_Init();
        
        // Mount FatFs moudle
        FS_Mount(0, &Fatfs);
        
        // Create directory named 'CLEON'
        FS_MakeDir("CLEON");
        
        // Change directory to 'CLEON'
        FS_ChangeDir("/CLEON");
        
    }else{
#if SYS_MMC_LED_INDICATION_FOR_ERROR == _ENABLE_      
        MICRO_SD_ERROR_LED_ON();
#endif        
    }
}

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void SYS_MMC_InitIO ( void )

Initializing Micro SD interface pins.

Returns: void

Parameters

void

Definition at line 67 of file sys_mmc.c.

{
    MICROSD_MOSI_PORT(SEL)   |=  BV(MICROSD_MOSI_PIN);
    MICROSD_MISO_PORT(SEL)   |=  BV(MICROSD_MISO_PIN);
    MICROSD_CLK_PORT(SEL)    |=  BV(MICROSD_CLK_PIN);
    
    MICROSD_MOSI_PORT(DIR)   |=  BV(MICROSD_MOSI_PIN);
    MICROSD_CLK_PORT(DIR)    |=  BV(MICROSD_CLK_PIN);
    
    MICROSD_CS_PORT(SEL)     &= ~BV(MICROSD_CS_PIN);
    MICROSD_CS_PORT(OUT)     |=  BV(MICROSD_CS_PIN);
    MICROSD_CS_PORT(DIR)     |=  BV(MICROSD_CS_PIN);
    
    MICROSD_MOSI_PORT(REN)   |=  BV(MICROSD_MOSI_PIN);
    MICROSD_MISO_PORT(REN)   |=  BV(MICROSD_MISO_PIN);
    
    MICROSD_MOSI_PORT(OUT)   |=  BV(MICROSD_MOSI_PIN);
    MICROSD_MISO_PORT(OUT)   |=  BV(MICROSD_MISO_PIN);
    
    MICROSD_STATUS_PORT(DIR) &= ~BV(MICROSD_STATUS_PIN);
    MICROSD_STATUS_PORT(IES) &= ~BV(MICROSD_STATUS_PIN);
    MICROSD_STATUS_PORT(IE)  |=  BV(MICROSD_STATUS_PIN);
}

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void SYS_MMC_ReadFrame	(	unsigned char *	ptrucBuffer,
		unsigned int	uiSize
	)

Read a frame of bytes via SPI.

Returns: void

Parameters

ptrucBuffer	- Place to store the received bytes
uiSize	- Indicator of how many bytes to read

Definition at line 116 of file sys_mmc.c.

{
    unsigned int uiGIE = __get_SR_register() & GIE;         //Store current GIE state
    __disable_interrupt();                                  //Make this operation atomic
    UCB1IFG &= ~UCRXIFG;                                    //Ensure RXIFG is clear
    //Clock the actual data transfer and receive the bytes
    while (uiSize--){
        while (!(UCB1IFG & UCTXIFG)) ;                      //Wait while not ready for TX
        UCB1TXBUF = 0xff;                                   //Write dummy byte
        while (!(UCB1IFG & UCRXIFG)) ;                      //Wait for RX buffer (full)
        *ptrucBuffer++ = UCB1RXBUF;
    }
    __bis_SR_register(uiGIE);                               //Restore original GIE state
}

void SYS_MMC_SelectCard ( void )

Set the SD Card's chip-select signal to low.

Returns: void

Parameters

void

Definition at line 187 of file sys_mmc.c.

{
    MICROSD_CS_PORT(OUT) &= ~BV(MICROSD_CS_PIN);
}

void SYS_MMC_SendFrame	(	unsigned char *	ptrucBuffer,
		unsigned int	uiSize
	)

Send a frame of bytes via SPI.

Returns: void

Parameters

ptrucBuffer	- Place that holds the bytes to send
uiSize	- Indicator of how many bytes to send

Definition at line 144 of file sys_mmc.c.

{
    unsigned int uiGIE = __get_SR_register() & GIE;         //Store current GIE state
    __disable_interrupt();                                  //Make this operation atomic
    //Clock the actual data transfer and send the bytes. Note that we
    //intentionally not read out the receive buffer during frame transmission
    //in order to optimize transfer speed, however we need to take care of the
    //resulting overrun condition.
    while (uiSize--){
        while (!(UCB1IFG & UCTXIFG)) ;                      //Wait while not ready for TX
        UCB1TXBUF = *ptrucBuffer++;                         //Write byte
    }
    while (UCB1STAT & UCBUSY) ;                             //Wait for all TX/RX to finish
    UCB1RXBUF;                                              //Dummy read to empty RX buffer
                                                            //and clear any overrun conditions
    __bis_SR_register(uiGIE);                               //Restore original GIE state
}

Variable Documentation

bool bFLAG_MicroSDInserted = _CLEAR_

Definition at line 18 of file sys_mmc.c.

FATFS Fatfs

Definition at line 14 of file fs_init.c.

FIL fileObject

Definition at line 15 of file fs_init.c.

Functions

Variables

Detailed Description

Function Documentation

Variable Documentation