LPC17xx/40xx SDMMC example

Detailed Description

Example description
This example describes how to use the SD/MMC interface with a SD card and a FATFS filesystem.

To use the example, plug a SD card, connect a serial cable to the board's RS232/UART port and start a terminal program to monitor the port. The terminal program on the host PC should be setup for 115K8N1.

Special connection requirements
There are no special connection requirements for this example.

Build procedures:
LPC17xx/40xx example quickstart for Keil uVision4
LPC17xx/40xx example quickstart for IAR EWARM
LPC17xx/40xx example quickstart for Code Red Xpresso

Supported boards and board setup:
Embedded Artists' LPC1788 Developer's Kit
Embedded Artists' LPC4088 Developer's Kit

Submitting LPCOpen issues:
Community support for LPCOpen

Macros
#define	debugstr(str)   DEBUGOUT(str)
#define	BUFFER_SIZE   4096

Functions
STATIC void	waitMs (uint32_t time)
STATIC void	setupEvWakeup (void *pEvent)
	Sets up the event driven wakeup.
STATIC uint32_t	waitEvIRQDriven (void)
	A better wait callback for SDMMC driven by the IRQ flag.
STATIC void	initAppTimer (void)
STATIC void	initAppSDMMC ()
void	die (FRESULT rc)
	Error processing function: stop with dying message.
void	SysTick_Handler (void)
	System tick interrupt handler.
void	SDIO_IRQHandler (void)
	SDC interrupt handler sub-routine.
int	main (void)
	Main routine for SDMMC example.

Variables
STATIC FATFS	fatFS
STATIC FIL	fileObj
STATIC INT	buffer [BUFFER_SIZE/4]
STATIC volatile int32_t	sdcWaitExit = 0
STATIC SDMMC_EVENT_T *	event
STATIC volatile Status	eventResult = ERROR
SDMMC_CARD_T	sdCardInfo
volatile uint32_t	timerCntms = 0

Macro Definition Documentation

#define BUFFER_SIZE   4096

Definition at line 71 of file sdmmc.c.

#define debugstr

(

str

)

DEBUGOUT(str)

Definition at line 68 of file sdmmc.c.

Typedef Documentation

typedef SDMMC_CARD_T CARD_HANDLE_T

Definition at line 45 of file fsmci_cfg.h.

Function Documentation

void die

(

FRESULT

rc

)

Error processing function: stop with dying message.

Parameters

rc	: FatFs return value

Returns

Nothing

Definition at line 164 of file sdmmc.c.

STATIC void initAppSDMMC

(

)

Definition at line 143 of file sdmmc.c.

STATIC void initAppTimer

(

void

)

Definition at line 136 of file sdmmc.c.

int main

(

void

)

Main routine for SDMMC example.

Main program body.

Returns

Nothing

Definition at line 230 of file sdmmc.c.

void SDIO_IRQHandler

(

void

)

SDC interrupt handler sub-routine.

Returns

Nothing

Definition at line 196 of file sdmmc.c.

STATIC void setupEvWakeup

(

void *

pEvent

)

Sets up the event driven wakeup.

Parameters

pEvent

: Event information

Returns

Nothing

Definition at line 106 of file sdmmc.c.

void SysTick_Handler

(

void

)

System tick interrupt handler.

SysTick 1mS tick handler.

Returns

Nothing

Definition at line 174 of file sdmmc.c.

STATIC uint32_t waitEvIRQDriven

(

void

)

A better wait callback for SDMMC driven by the IRQ flag.

Returns

0 on success, or failure condition (Nonzero)

Definition at line 124 of file sdmmc.c.

STATIC void waitMs

(

uint32_t

time

)

Definition at line 92 of file sdmmc.c.

Variable Documentation

STATIC INT buffer[BUFFER_SIZE/4]

Definition at line 75 of file sdmmc.c.

STATIC SDMMC_EVENT_T* event

Definition at line 77 of file sdmmc.c.

STATIC volatile Status eventResult = ERROR

Definition at line 78 of file sdmmc.c.

STATIC FATFS fatFS

Definition at line 73 of file sdmmc.c.

STATIC FIL fileObj

Definition at line 74 of file sdmmc.c.

SDMMC_CARD_T sdCardInfo

Type used for SD Card handle

Definition at line 85 of file sdmmc.c.

STATIC volatile int32_t sdcWaitExit = 0

Definition at line 76 of file sdmmc.c.

volatile uint32_t timerCntms = 0

Definition at line 86 of file sdmmc.c.