add sdcard driver.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@732 bbd45198-f89e-11dd-88c7-29a3b14d5316

bsp/lpc176x/SConscript

@@ -12,9 +12,12 @@ group['CPPDEFINES'] = []
 group['LINKFLAGS'] = ''
 
 src_bsp   = ['application.c', 'startup.c', 'board.c']
-src_drv   = ['uart.c']
+src_drv   = ['uart.c', 'led.c']
 src_cmsis = ['CMSIS/CM3/CoreSupport/core_cm3.c', 'CMSIS/CM3/DeviceSupport/NXP/LPC17xx/system_LPC17xx.c']
 
+if rtconfig.RT_USING_DFS:
+    src_drv += ['sd.c', 'spi.c']
+
 group['src'] = File(src_bsp + src_drv + src_cmsis)
 
 # add group to project list

bsp/lpc176x/application.c

@@ -12,110 +12,60 @@
  * 2009-01-05     Bernard      the first version
  * 2010-03-04     Magicoe      for LPC1766 version
  * 2010-05-02     Aozima       add led function
+ * 2010-05-24     Bernard      add filesystem initialization and move led function to led.c
  */
 
-/**2q
+/**
  * @addtogroup LPC17
  */
 /*@{*/
 
 #include <rtthread.h>
-#include "LPC17xx.h"
 
-static void rt_hw_led_init(void)
-{
-    LPC_GPIO2->FIODIR0 |= 1<<0; /* led0:P2.0 */
-    LPC_GPIO2->FIODIR0 |= 1<<1; /* led1:P2.1 */
-}
+#ifdef RT_USING_DFS
+/* dfs init */
+#include <dfs_init.h>
+/* dfs filesystem:ELM FatFs filesystem init */
+#include <dfs_elm.h>
+/* dfs Filesystem APIs */
+#include <dfs_fs.h>
+#endif
 
-static void rt_hw_led_on(unsigned int led)
-{
-    switch(led)
-    {
-    case 0: /* P2.0 = 1 */
-        LPC_GPIO2->FIOSET0 = 1<<0;
-        break;
-    case 1: /* P2.1 = 1 */
-        LPC_GPIO2->FIOSET0 = 1<<1;
-        break;
-    default:
-        break;
-    }
-}
-
-static void rt_hw_led_off(unsigned int led)
-{
-    switch(led)
-    {
-    case 0: /* P2.0 = 0 */
-        LPC_GPIO2->FIOCLR0 = 1<<0;
-        break;
-    case 1: /* P2.1 = 0 */
-        LPC_GPIO2->FIOCLR0 = 1<<1;
-        break;
-    default:
-        break;
-    }
-}
-static void rt_thread_entry_led1(void* parameter)
+/* thread phase init */
+void rt_init_thread_entry(void *parameter)
 {
-    /* init led configuration */
-    rt_hw_led_init();
-
-    while (1)
+    /* Filesystem Initialization */
+#ifdef RT_USING_DFS
     {
-        /* led on */
-        rt_kprintf("led1 on\r\n");
-        rt_hw_led_on(0);
-        rt_thread_delay(50); /* sleep 0.5 second and switch to other thread */
+        /* init the device filesystem */
+        dfs_init();
 
-        /* led off */
-        rt_kprintf("led1 off\r\n");
-        rt_hw_led_off(0);
-        rt_thread_delay(50);
-    }
-}
+        /* init the elm FAT filesystam*/
+        elm_init();
 
-char thread_led2_stack[1024];
-struct rt_thread thread_led2;
-void rt_thread_entry_led2(void* parameter)
-{
-    unsigned int count=0;
-    while (1)
-    {
-        /* led on */
-        rt_kprintf("led2 on,count : %d\r\n",count);
-        count++;
-        rt_hw_led_on(1);
-        rt_thread_delay(RT_TICK_PER_SECOND);
-
-        /* led off */
-        rt_kprintf("led2 off\r\n");
-        rt_hw_led_off(1);
-        rt_thread_delay(RT_TICK_PER_SECOND);
+        /* mount sd card fat partition 1 as root directory */
+        if (dfs_mount("sd0", "/", "elm", 0, 0) == 0)
+            rt_kprintf("File System initialized!\n");
+        else
+            rt_kprintf("File System init failed!\n");
     }
+#endif
 }
 
 int rt_application_init()
 {
-    rt_thread_t thread;
-
-    /* create led1 thread */
-    thread = rt_thread_create("led1",
-                              rt_thread_entry_led1, RT_NULL,
-                              512,
-                              20, 5);
-    if (thread != RT_NULL)
-        rt_thread_startup(thread);
+    rt_thread_t init_thread;
 
-    /* init led2 thread */
-    rt_thread_init(&thread_led2,
-                   "led2",
-                   rt_thread_entry_led2,
-                   RT_NULL,
-                   &thread_led2_stack[0],
-                   sizeof(thread_led2_stack),10,10);
-    rt_thread_startup(&thread_led2);
+#if (RT_THREAD_PRIORITY_MAX == 32)
+    init_thread = rt_thread_create("init",
+                                   rt_init_thread_entry, RT_NULL,
+                                   2048, 8, 20);
+#else
+    init_thread = rt_thread_create("init",
+                                   rt_init_thread_entry, RT_NULL,
+                                   2048, 80, 20);
+#endif
+    if (init_thread != RT_NULL) rt_thread_startup(init_thread);
 
     return 0;
 }

bsp/lpc176x/led.c

@@ -0,0 +1,38 @@
+#include "LPC17xx.h"
+#include "led.h"
+
+void rt_hw_led_init(void)
+{
+    LPC_GPIO2->FIODIR0 |= 1<<0; /* led0:P2.0 */
+    LPC_GPIO2->FIODIR0 |= 1<<1; /* led1:P2.1 */
+}
+
+void rt_hw_led_on(rt_uint32_t led)
+{
+    switch(led)
+    {
+    case 0: /* P2.0 = 1 */
+        LPC_GPIO2->FIOSET0 = 1<<0;
+        break;
+    case 1: /* P2.1 = 1 */
+        LPC_GPIO2->FIOSET0 = 1<<1;
+        break;
+    default:
+        break;
+    }
+}
+
+void rt_hw_led_off(rt_uint32_t led)
+{
+    switch(led)
+    {
+    case 0: /* P2.0 = 0 */
+        LPC_GPIO2->FIOCLR0 = 1<<0;
+        break;
+    case 1: /* P2.1 = 0 */
+        LPC_GPIO2->FIOCLR0 = 1<<1;
+        break;
+    default:
+        break;
+    }
+}

bsp/lpc176x/led.h

@@ -0,0 +1,10 @@
+#ifndef __LED_H__
+#define __LED_H__
+
+#include <rtthread.h>
+
+void rt_hw_led_init(void);
+void rt_hw_led_on (rt_uint32_t led);
+void rt_hw_led_off(rt_uint32_t led);
+
+#endif

bsp/lpc176x/project.Uv2

@@ -0,0 +1,159 @@
+### uVision2 Project, (C) Keil Software
+### Do not modify !
+
+Target (RT-Thread LPC17xx), 0x0004 // Tools: 'ARM-ADS'
+
+Group (Kernel)
+Group (LPC17XX)
+Group (finsh)
+Group (Filesystem)
+Group (Startup)
+
+File 1,1,<..\..\src\clock.c><clock.c>
+File 1,1,<..\..\src\device.c><device.c>
+File 1,1,<..\..\src\idle.c><idle.c>
+File 1,1,<..\..\src\ipc.c><ipc.c>
+File 1,1,<..\..\src\irq.c><irq.c>
+File 1,1,<..\..\src\kservice.c><kservice.c>
+File 1,1,<..\..\src\mem.c><mem.c>
+File 1,1,<..\..\src\mempool.c><mempool.c>
+File 1,1,<..\..\src\module.c><module.c>
+File 1,1,<..\..\src\object.c><object.c>
+File 1,1,<..\..\src\rtm.c><rtm.c>
+File 1,1,<..\..\src\scheduler.c><scheduler.c>
+File 1,1,<..\..\src\slab.c><slab.c>
+File 1,1,<..\..\src\thread.c><thread.c>
+File 1,1,<..\..\src\timer.c><timer.c>
+File 2,1,<..\..\libcpu\arm\lpc17xx\cpu.c><cpu.c>
+File 2,1,<..\..\libcpu\arm\lpc17xx\fault.c><fault.c>
+File 2,1,<..\..\libcpu\arm\lpc17xx\interrupt.c><interrupt.c>
+File 2,1,<..\..\libcpu\arm\lpc17xx\stack.c><stack.c>
+File 2,2,<..\..\libcpu\arm\lpc17xx\context_rvds.S><context_rvds.S>
+File 2,2,<..\..\libcpu\arm\lpc17xx\fault_rvds.S><fault_rvds.S>
+File 2,2,<..\..\libcpu\arm\lpc17xx\start_rvds.S><start_rvds.S>
+File 2,1,<..\..\libcpu\arm\common\backtrace.c><backtrace.c>
+File 2,1,<..\..\libcpu\arm\common\div0.c><div0.c>
+File 2,1,<..\..\libcpu\arm\common\showmem.c><showmem.c>
+File 3,1,<..\..\components\finsh\cmd.c><cmd.c>
+File 3,1,<..\..\components\finsh\finsh_compiler.c><finsh_compiler.c>
+File 3,1,<..\..\components\finsh\finsh_error.c><finsh_error.c>
+File 3,1,<..\..\components\finsh\finsh_heap.c><finsh_heap.c>
+File 3,1,<..\..\components\finsh\finsh_init.c><finsh_init.c>
+File 3,1,<..\..\components\finsh\finsh_node.c><finsh_node.c>
+File 3,1,<..\..\components\finsh\finsh_ops.c><finsh_ops.c>
+File 3,1,<..\..\components\finsh\finsh_parser.c><finsh_parser.c>
+File 3,1,<..\..\components\finsh\finsh_token.c><finsh_token.c>
+File 3,1,<..\..\components\finsh\finsh_var.c><finsh_var.c>
+File 3,1,<..\..\components\finsh\finsh_vm.c><finsh_vm.c>
+File 3,1,<..\..\components\finsh\shell.c><shell.c>
+File 3,1,<..\..\components\finsh\symbol.c><symbol.c>
+File 4,1,<..\..\components\dfs\src\dfs_fs.c><dfs_fs.c>
+File 4,1,<..\..\components\dfs\src\dfs_init.c><dfs_init.c>
+File 4,1,<..\..\components\dfs\src\dfs_posix.c><dfs_posix.c>
+File 4,1,<..\..\components\dfs\src\dfs_raw.c><dfs_raw.c>
+File 4,1,<..\..\components\dfs\src\dfs_util.c><dfs_util.c>
+File 4,1,<..\..\components\dfs\filesystems\elmfat\dfs_elm.c><dfs_elm.c>
+File 4,1,<..\..\components\dfs\filesystems\elmfat\ff.c><ff.c>
+File 5,1,<.\application.c><application.c>
+File 5,1,<.\startup.c><startup.c>
+File 5,1,<.\board.c><board.c>
+File 5,1,<.\uart.c><uart.c>
+File 5,1,<.\led.c><led.c>
+File 5,1,<.\sd.c><sd.c>
+File 5,1,<.\spi.c><spi.c>
+File 5,1,<CMSIS\CM3\CoreSupport\core_cm3.c><core_cm3.c>
+File 5,1,<CMSIS\CM3\DeviceSupport\NXP\LPC17xx\system_LPC17xx.c><system_LPC17xx.c>
+
+
+
+
+Options 1,0,0  // Target 'RT-Thread LPC17xx'
+ Device (LPC1768)
+ Vendor (NXP (founded by Philips))
+ Cpu (IRAM(0x10000000-0x10007FFF) IRAM2(0x20000000-0x20007FFF) IROM(0-0x7FFFF) CLOCK(12000000) CPUTYPE("Cortex-M3"))
+ FlashUt ()
+ StupF ("STARTUP\NXP\startup_LPC17xx.s" ("NXP LPC17xx Startup Code"))
+ FlashDR (UL2CM3(-O463 -S0 -C0 -FO7 -FD10000000 -FC800 -FN1 -FF0LPC_IAP_256 -FS00 -FL040000))
+ DevID (4868)
+ Rgf (LPC17xx.H)
+ Mem ()
+ C ()
+ A ()
+ RL ()
+ OH ()
+ DBC_IFX ()
+ DBC_CMS ()
+ DBC_AMS ()
+ DBC_LMS ()
+ UseEnv=0
+ EnvBin ()
+ EnvInc ()
+ EnvLib ()
+ EnvReg (ÿNXP\)
+ OrgReg (ÿNXP\)
+ TgStat=16
+ OutDir (.\obj\)
+ OutName (rtthread-lpc)
+ GenApp=1
+ GenLib=0
+ GenHex=0
+ Debug=1
+ Browse=1
+ LstDir (.\obj\)
+ HexSel=1
+ MG32K=0
+ TGMORE=0
+ RunUsr 0 0 <>
+ RunUsr 1 0 <>
+ BrunUsr 0 0 <>
+ BrunUsr 1 0 <>
+ CrunUsr 0 0 <>
+ CrunUsr 1 0 <>
+ SVCSID <>
+ GLFLAGS=1790
+ ADSFLGA { 243,31,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
+ ACPUTYP ("Cortex-M3")
+ RVDEV ()
+ ADSTFLGA { 0,12,16,2,99,0,0,66,0,0,0,0,0,0,0,0,0,0,0,0 }
+ OCMADSOCM { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
+ OCMADSIRAM { 0,0,0,0,16,0,128,0,0 }
+ OCMADSIROM { 1,0,0,0,0,0,0,8,0 }
+ OCMADSXRAM { 0,0,0,0,0,0,0,0,0 }
+ OCR_RVCT { 1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,8,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,16,0,128,0,0,0,0,0,0,32,0,128,0,0 }
+ RV_STAVEC ()
+ ADSCCFLG { 5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
+ ADSCMISC ()
+ ADSCDEFN ()
+ ADSCUDEF ()
+ ADSCINCD (..\..\components\dfs;CMSIS\CM3\DeviceSupport\NXP\LPC17xx;.;..\..\libcpu\arm\lpc17xx;..\..\include;..\..\components\dfs\include;CMSIS\CM3\CoreSupport;..\..\components\finsh)
+ ADSASFLG { 1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
+ ADSAMISC ()
+ ADSADEFN ()
+ ADSAUDEF ()
+ ADSAINCD ()
+ PropFld { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
+ IncBld=1
+ AlwaysBuild=0
+ GenAsm=0
+ AsmAsm=0
+ PublicsOnly=0
+ StopCode=3
+ CustArgs ()
+ LibMods ()
+ ADSLDFG { 17,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
+ ADSLDTA (0x00000000)
+ ADSLDDA (0x10000000)
+ ADSLDSC ()
+ ADSLDIB ()
+ ADSLDIC ()
+ ADSLDMC ( --keep __fsym_* --keep __vsym_*)
+ ADSLDIF ()
+ ADSLDDW ()
+  OPTDL (SARMCM3.DLL)(-MPU)(DARMP1.DLL)(-pLPC1768)(SARMCM3.DLL)(-MPU)(TARMP1.DLL)(-pLPC1768)
+  OPTDBG 48126,7,()()()()()()()()()() (Segger\JL2CM3.dll)()()()
+ FLASH1 { 9,0,0,0,1,0,0,0,6,16,0,0,0,0,0,0,0,0,0,0 }
+ FLASH2 (Segger\JL2CM3.dll)
+ FLASH3 ("" ())
+ FLASH4 ()
+EndOpt
+

bsp/lpc176x/rtconfig.h

@@ -75,7 +75,7 @@
 #define FINSH_USING_DESCRIPTION
 
 /* SECTION: device filesystem support */
-/* #define RT_USING_DFS */
+#define RT_USING_DFS
 #define RT_USING_DFS_ELMFAT
 
 /* the max number of mounted filesystem */

bsp/lpc176x/sd.c

@@ -0,0 +1,448 @@
+#include <rtthread.h>
+#include <dfs_fs.h>
+
+#include "spi.h"
+#include "sd.h"
+
+/* 512 bytes for each sector */
+#define SD_SECTOR_SIZE	512
+
+/* token for write operation */
+#define TOKEN_SINGLE_BLOCK	0xFE
+#define TOKEN_MULTI_BLOCK	0xFC
+#define TOKEN_STOP_TRAN		0xFD
+
+/* Local variables */
+static uint8_t CardType;
+static SDCFG SDCfg;
+static struct rt_device sdcard_device;
+static struct dfs_partition part;
+
+/* Local Function Prototypes */
+static bool 	LPC17xx_SD_Init (void);
+static uint8_t  LPC17xx_SD_SendCmd     (uint8_t cmd, uint32_t arg);
+static bool 	LPC17xx_SD_ReadSector (uint32_t sector, uint8_t *buff, uint32_t count);
+static bool 	LPC17xx_SD_ReadDataBlock ( uint8_t *buff,	uint32_t cnt);
+static bool 	LPC17xx_SD_WriteSector (uint32_t sector, const uint8_t *buff, uint32_t count);
+static bool 	LPC17xx_SD_WirteDataBlock (const uint8_t *buff, uint8_t token);
+static bool 	LPC17xx_SD_ReadCfg (SDCFG *cfg);
+static bool 	LPC17xx_SD_WaitForReady (void);
+
+/* wait until the card is not busy */
+static bool LPC17xx_SD_WaitForReady (void)
+{
+	uint8_t res;
+	/* timeout should be large enough to make sure the write operaion can be completed. */
+	uint32_t timeout = 400000;
+
+	LPC17xx_SPI_SendByte(0xFF);
+	do {
+		res = LPC17xx_SPI_RecvByte();
+	} while ((res != 0xFF) && timeout--);
+
+	return (res == 0xFF ? true : false);
+}
+
+/* Initialize SD/MMC card. */
+static bool LPC17xx_SD_Init (void)
+{
+	uint32_t i, timeout;
+	uint8_t cmd, ct, ocr[4];
+	bool ret = false;
+
+	/* Initialize SPI interface and enable Flash Card SPI mode. */
+	LPC17xx_SPI_Init ();
+
+	/* At least 74 clock cycles are required prior to starting bus communication */
+	for (i = 0; i < 80; i++) {	   /* 80 dummy clocks */
+		LPC17xx_SPI_SendByte (0xFF);
+	}
+
+	ct = CT_NONE;
+	if (LPC17xx_SD_SendCmd (GO_IDLE_STATE, 0) == 0x1)
+	{
+		timeout = 50000;
+		if (LPC17xx_SD_SendCmd(CMD8, 0x1AA) == 1) {	/* SDHC */
+			/* Get trailing return value of R7 resp */
+			for (i = 0; i < 4; i++) ocr[i] = LPC17xx_SPI_RecvByte();
+			if (ocr[2] == 0x01 && ocr[3] == 0xAA) {	/* The card can work at vdd range of 2.7-3.6V */
+				/* Wait for leaving idle state (ACMD41 with HCS bit) */
+				while (timeout-- && LPC17xx_SD_SendCmd(SD_SEND_OP_COND, 1UL << 30));
+				/* Check CCS bit in the OCR */
+				if (timeout && LPC17xx_SD_SendCmd(READ_OCR, 0) == 0) {
+					for (i = 0; i < 4; i++) ocr[i] = LPC17xx_SPI_RecvByte();
+					ct = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2;
+				}
+			} else {  /* SDSC or MMC */
+				if (LPC17xx_SD_SendCmd(SD_SEND_OP_COND, 0) <= 1) 	{
+					ct = CT_SD1; cmd = SD_SEND_OP_COND;	/* SDSC */
+				} else {
+					ct = CT_MMC; cmd = SEND_OP_COND;	/* MMC */
+				}
+				/* Wait for leaving idle state */
+				while (timeout-- && LPC17xx_SD_SendCmd(cmd, 0));
+				/* Set R/W block length to 512 */
+				if (!timeout || LPC17xx_SD_SendCmd(SET_BLOCKLEN, SD_SECTOR_SIZE) != 0)
+					ct = CT_NONE;
+			}
+		}
+	}
+	CardType = ct;
+	LPC17xx_SPI_Release();
+
+	if (ct) {			/* Initialization succeeded */
+		ret = true;
+		if ( ct == CT_MMC ) {
+			LPC17xx_SPI_SetSpeed(SPI_SPEED_20MHz);
+		} else {
+			LPC17xx_SPI_SetSpeed(SPI_SPEED_20MHz);
+		}
+	} else {			/* Initialization failed */
+		LPC17xx_SPI_Select ();
+		LPC17xx_SD_WaitForReady ();
+		LPC17xx_SPI_DeInit();
+	}
+
+	return ret;
+}
+
+/*****************************************************************************
+	Send a Command to Flash card and get a Response
+	cmd:  cmd index
+	arg: argument for the cmd
+	return the received response of the commond
+*****************************************************************************/
+static uint8_t LPC17xx_SD_SendCmd (uint8_t cmd, uint32_t arg)
+{
+	uint32_t r1, n;
+
+	if (cmd & 0x80) {	/* ACMD<n> is the command sequence of CMD55-CMD<n> */
+		cmd &= 0x7F;
+		r1 = LPC17xx_SD_SendCmd(APP_CMD, 0);   /* CMD55 */
+		if (r1 > 1) return r1; /* cmd send failed */
+	}
+
+	/* Select the card and wait for ready */
+	LPC17xx_SPI_DeSelect();
+	LPC17xx_SPI_Select();
+	if (LPC17xx_SD_WaitForReady() == false ) return 0xFF;
+
+	LPC17xx_SPI_SendByte (0xFF);	 /* prepare 8 clocks */
+	LPC17xx_SPI_SendByte (cmd);
+	LPC17xx_SPI_SendByte (arg >> 24);
+	LPC17xx_SPI_SendByte (arg >> 16);
+	LPC17xx_SPI_SendByte (arg >> 8);
+	LPC17xx_SPI_SendByte (arg);
+   /* Checksum, should only be valid for the first command.CMD0 */
+	n = 0x01;							/* Dummy CRC + Stop */
+	if (cmd == GO_IDLE_STATE) n = 0x95;			/* Valid CRC for CMD0(0) */
+	if (cmd == CMD8) n = 0x87;			/* Valid CRC for CMD8(0x1AA) */
+	LPC17xx_SPI_SendByte(n);
+
+	if (cmd == STOP_TRAN) LPC17xx_SPI_RecvByte ();		/* Skip a stuff byte when stop reading */
+
+	n = 10;		/* Wait for a valid response in timeout of 10 attempts */
+	do {
+		r1 = LPC17xx_SPI_RecvByte ();
+	} while ((r1 & 0x80) && --n);
+
+	return (r1);		/* Return with the response value */
+}
+
+/*****************************************************************************
+	Read "count" Sector(s) starting from sector index "sector",
+	buff <- [sector, sector+1, ... sector+count-1]
+	if success, return true, otherwise return false
+*****************************************************************************/
+static bool LPC17xx_SD_ReadSector (uint32_t sector, uint8_t *buff, uint32_t count)
+{
+	/* Convert to byte address if needed */
+	if (!(CardType & CT_BLOCK)) sector *= SD_SECTOR_SIZE;
+
+	if (count == 1) {	/* Single block read */
+		if ((LPC17xx_SD_SendCmd(READ_BLOCK, sector) == 0)
+			&& LPC17xx_SD_ReadDataBlock(buff, SD_SECTOR_SIZE))
+			count = 0;
+	} else {				/* Multiple block read */
+		if (LPC17xx_SD_SendCmd(READ_MULT_BLOCK, sector) == 0) {
+			do {
+				if (!LPC17xx_SD_ReadDataBlock(buff, SD_SECTOR_SIZE)) break;
+				buff += SD_SECTOR_SIZE;
+			} while (--count);
+			LPC17xx_SD_SendCmd(STOP_TRAN, 0);	/* STOP_TRANSMISSION */
+		}
+	}
+	LPC17xx_SPI_Release();
+
+	return count ? false : true;
+}
+
+/*****************************************************************************
+	read specified number of data to specified buffer.
+	buff:  Data buffer to store received data
+	cnt:   Byte count (must be multiple of 4, normally 512)
+*****************************************************************************/
+static bool LPC17xx_SD_ReadDataBlock ( uint8_t *buff,	uint32_t cnt)
+{
+	uint8_t token;
+	uint32_t timeout;
+
+	timeout = 20000;
+	do {							/* Wait for data packet in timeout of 100ms */
+		token = LPC17xx_SPI_RecvByte();
+	} while ((token == 0xFF) && timeout--);
+	if(token != 0xFE) return false;	/* If not valid data token, return with error */
+
+#if USE_FIFO
+	LPC17xx_SPI_RecvBlock_FIFO (buff, cnt);
+#else
+	do {	/* Receive the data block into buffer */
+		*buff++ = LPC17xx_SPI_RecvByte ();
+		*buff++ = LPC17xx_SPI_RecvByte ();
+		*buff++ = LPC17xx_SPI_RecvByte ();
+		*buff++ = LPC17xx_SPI_RecvByte ();
+	} while (cnt -= 4);
+#endif /* USE_FIFO */
+	LPC17xx_SPI_RecvByte ();						/* Discard CRC */
+	LPC17xx_SPI_RecvByte ();
+
+	return true;					/* Return with success */
+}
+
+/*****************************************************************************
+	Write "count" Sector(s) starting from sector index "sector",
+	buff -> [sector, sector+1, ... sector+count-1]
+	if success, return true, otherwise return false
+*****************************************************************************/
+static bool LPC17xx_SD_WriteSector (uint32_t sector, const uint8_t *buff, uint32_t count)
+{
+	if (!(CardType & CT_BLOCK)) sector *= 512;	/* Convert to byte address if needed */
+
+	if (count == 1) {	/* Single block write */
+		if ((LPC17xx_SD_SendCmd(WRITE_BLOCK, sector) == 0)
+			&& LPC17xx_SD_WirteDataBlock(buff, TOKEN_SINGLE_BLOCK))
+			count = 0;
+	} else {				/* Multiple block write */
+		if (CardType & CT_SDC) LPC17xx_SD_SendCmd(SET_WR_BLK_ERASE_COUNT, count);
+		if (LPC17xx_SD_SendCmd(WRITE_MULT_BLOCK, sector) == 0) {
+			do {
+				if (!LPC17xx_SD_WirteDataBlock(buff, TOKEN_MULTI_BLOCK)) break;
+				buff += 512;
+			} while (--count);
+		#if 1
+			if (!LPC17xx_SD_WirteDataBlock(0, TOKEN_STOP_TRAN))	/* STOP_TRAN token */
+				count = 1;
+		#else
+			LPC17xx_SPI_SendByte(TOKEN_STOP_TRAN);
+		#endif
+		}
+	}
+	LPC17xx_SPI_Release();
+	return count ? false : true;
+}
+
+/*****************************************************************************
+	Write 512 bytes
+	buffer: 512 byte data block to be transmitted
+	token:  0xFE -> single block
+			0xFC -> multi block
+			0xFD -> Stop
+*****************************************************************************/
+static bool LPC17xx_SD_WirteDataBlock (const uint8_t *buff, uint8_t token)
+{
+	uint8_t resp, i;
+
+	i = i; // avoid warning
+
+	LPC17xx_SPI_SendByte (token);		/* send data token first*/
+
+	if (token != TOKEN_STOP_TRAN) {
+#if USE_FIFO
+		LPC17xx_SPI_SendBlock_FIFO (buff);
+#else
+      /* Send data. */
+      for (i = 512/4; i ; i--) {
+         LPC17xx_SPI_SendByte (*buff++);
+		 LPC17xx_SPI_SendByte (*buff++);
+		 LPC17xx_SPI_SendByte (*buff++);
+		 LPC17xx_SPI_SendByte (*buff++);
+      }
+#endif /* USE_FIFO */
+		LPC17xx_SPI_SendByte(0xFF);					/* 16-bit CRC (Dummy) */
+		LPC17xx_SPI_SendByte(0xFF);
+
+		resp = LPC17xx_SPI_RecvByte();				/* Receive data response */
+		if ((resp & 0x1F) != 0x05)		/* If not accepted, return with error */
+			return false;
+
+		if ( LPC17xx_SD_WaitForReady() == false)  /* Wait while Flash Card is busy. */
+			return false;
+	}
+
+	return true;
+}
+
+/* Read MMC/SD Card device configuration. */
+static bool LPC17xx_SD_ReadCfg (SDCFG *cfg)
+{
+	uint8_t i;
+	uint16_t csize;
+	uint8_t n, csd[16];
+	bool retv = false;
+
+	/* Read the OCR - Operations Condition Register. */
+	if (LPC17xx_SD_SendCmd (READ_OCR, 0) != 0x00) goto x;
+	for (i = 0; i < 4; i++)	cfg->ocr[i] = LPC17xx_SPI_RecvByte ();
+
+	/* Read the CID - Card Identification. */
+	if ((LPC17xx_SD_SendCmd (SEND_CID, 0) != 0x00) ||
+		(LPC17xx_SD_ReadDataBlock (cfg->cid, 16) == false))
+		goto x;
+
+    /* Read the CSD - Card Specific Data. */
+	if ((LPC17xx_SD_SendCmd (SEND_CSD, 0) != 0x00) ||
+		(LPC17xx_SD_ReadDataBlock (cfg->csd, 16) == false))
+		goto x;
+
+	cfg -> sectorsize = SD_SECTOR_SIZE;
+
+	/* Get number of sectors on the disk (DWORD) */
+	if ((cfg->csd[0] >> 6) == 1) {	/* SDC ver 2.00 */
+		csize = cfg->csd[9] + ((uint16_t)cfg->csd[8] << 8) + 1;
+		cfg -> sectorcnt = (uint32_t)csize << 10;
+	} else {					/* SDC ver 1.XX or MMC*/
+		n = (cfg->csd[5] & 15) + ((cfg->csd[10] & 128) >> 7) + ((cfg->csd[9] & 3) << 1) + 2;  // 19
+		csize = (cfg->csd[8] >> 6) + ((uint16_t)cfg->csd[7] << 2) + ((uint16_t)(cfg->csd[6] & 3) << 10) + 1; // 3752
+		cfg -> sectorcnt = (uint32_t)csize << (n - 9); // 3842048
+	}
+
+	cfg->size = cfg -> sectorcnt * cfg -> sectorsize; // 512*3842048=1967128576Byte (1.83GB)
+
+	/* Get erase block size in unit of sector (DWORD) */
+	if (CardType & CT_SD2) {			/* SDC ver 2.00 */
+		if (LPC17xx_SD_SendCmd(SD_STATUS /*ACMD13*/, 0) == 0) {		/* Read SD status */
+			LPC17xx_SPI_RecvByte();
+			if (LPC17xx_SD_ReadDataBlock(csd, 16)) {				/* Read partial block */
+				for (n = 64 - 16; n; n--) LPC17xx_SPI_RecvByte();	/* Purge trailing data */
+				cfg->blocksize = 16UL << (csd[10] >> 4);
+				retv = true;
+			}
+		}
+	} else {					/* SDC ver 1.XX or MMC */
+		if ((LPC17xx_SD_SendCmd(SEND_CSD, 0) == 0) && LPC17xx_SD_ReadDataBlock(csd, 16)) {	/* Read CSD */
+			if (CardType & CT_SD1) {			/* SDC ver 1.XX */
+				cfg->blocksize = (((csd[10] & 63) << 1) + ((uint16_t)(csd[11] & 128) >> 7) + 1) << ((csd[13] >> 6) - 1);
+			} else {					/* MMC */
+				// cfg->blocksize = ((uint16_t)((buf[10] & 124) >> 2) + 1) * (((buf[11] & 3) << 3) + ((buf[11] & 224) >> 5) + 1);
+				cfg->blocksize = ((uint16_t)((cfg->csd[10] & 124) >> 2) + 1) * (((cfg->csd[10] & 3) << 3) + ((cfg->csd[11] & 224) >> 5) + 1);
+			}
+			retv = true;
+		}
+	}
+
+x:	LPC17xx_SPI_Release();
+    return (retv);
+}
+
+static rt_err_t rt_sdcard_init(rt_device_t dev)
+{
+	return RT_EOK;
+}
+
+static rt_err_t rt_sdcard_open(rt_device_t dev, rt_uint16_t oflag)
+{
+	return RT_EOK;
+}
+
+static rt_err_t rt_sdcard_close(rt_device_t dev)
+{
+	return RT_EOK;
+}
+
+static rt_size_t rt_sdcard_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
+{
+	bool status;
+	rt_uint32_t nr = size / SD_SECTOR_SIZE;
+
+	status = LPC17xx_SD_ReadSector(part.offset * SECTOR_SIZE + pos, buffer, nr);
+
+	if (status == true) return nr * SECTOR_SIZE;
+
+	rt_kprintf("read failed: %d, buffer 0x%08x\n", status, buffer);
+	return 0;
+}
+
+static rt_size_t rt_sdcard_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
+{
+	bool status;
+	rt_uint32_t nr = size / SD_SECTOR_SIZE;
+
+	status = LPC17xx_SD_WriteSector(part.offset * SECTOR_SIZE + pos, buffer, nr);
+
+	if (status == true) return nr * SECTOR_SIZE;
+
+	rt_kprintf("write failed: %d, buffer 0x%08x\n", status, buffer);
+	return 0;
+}
+
+static rt_err_t rt_sdcard_control(rt_device_t dev, rt_uint8_t cmd, void *args)
+{
+	return RT_EOK;
+}
+
+void rt_hw_sdcard_init()
+{
+    if (LPC17xx_SD_Init() && LPC17xx_SD_ReadCfg(&SDCfg))
+	{
+		bool status;
+		rt_uint8_t *sector;
+
+		/* get the first sector to read partition table */
+		sector = (rt_uint8_t*) rt_malloc (512);
+		if (sector == RT_NULL)
+		{
+			rt_kprintf("allocate partition sector buffer failed\n");
+			return;
+		}
+
+		status = LPC17xx_SD_ReadSector(0, sector, 512);
+		if (status == true)
+		{
+			/* get the first partition */
+			if (dfs_filesystem_get_partition(&part, sector, 0) != 0)
+            {
+                /* there is no partition */
+                part.offset = 0;
+                part.size   = 0;
+            }
+		}
+		else
+		{
+			/* there is no partition table */
+			part.offset = 0;
+			part.size   = 0;
+		}
+
+		/* release sector buffer */
+		rt_free(sector);
+
+		/* register sdcard device */
+		sdcard_device.type  = RT_Device_Class_Block;
+		sdcard_device.init 	= rt_sdcard_init;
+		sdcard_device.open 	= rt_sdcard_open;
+		sdcard_device.close = rt_sdcard_close;
+		sdcard_device.read 	= rt_sdcard_read;
+		sdcard_device.write = rt_sdcard_write;
+		sdcard_device.control = rt_sdcard_control;
+
+		/* no private */
+		sdcard_device.private = &SDCfg;
+
+		rt_device_register(&sdcard_device, "sd0",
+			RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE);
+
+		return;
+	}
+
+	rt_kprintf("sdcard init failed\n");
+}

bsp/lpc176x/sd.h

@@ -0,0 +1,47 @@
+#ifndef __SD_H__
+#define __SD_H__
+
+#include <stdint.h>
+
+/* SD/MMC Commands */
+#define GO_IDLE_STATE    		(0x40 + 0)		// CMD0
+#define SEND_OP_COND     		(0x40 + 1)
+#define CMD8			 		(0x40 + 8)		// CMD8
+#define SEND_CSD         		(0x40 + 9)
+#define SEND_CID         		(0x40 + 10)		// CMD10
+#define STOP_TRAN        		(0x40 + 12)		// CMD12
+#define SET_BLOCKLEN     		(0x40 + 16)		// CMD16
+#define READ_BLOCK       		(0x40 + 17)
+#define READ_MULT_BLOCK  		(0x40 + 18)
+#define WRITE_BLOCK      		(0x40 + 24)
+#define WRITE_MULT_BLOCK 		(0x40 + 25)
+#define APP_CMD          		(0x40 + 55)		// CMD55
+#define READ_OCR		 		(0x40 + 58)		// CMD58
+#define CRC_ON_OFF       		(0x40 + 59)
+#define SD_SEND_OP_COND  		(0xC0 + 41)		// ACMD41
+#define SD_STATUS		 		(0xC0 + 13)		// ACMD13, SD_STATUS (SDC)
+#define SET_WR_BLK_ERASE_COUNT	(0xC0 + 23)		// ACMD23 (SDC)
+
+/* Card type flags (CardType) */
+#define CT_NONE				0x00
+#define CT_MMC				0x01
+#define CT_SD1				0x02
+#define CT_SD2				0x04
+#define CT_SDC				(CT_SD1|CT_SD2)
+#define CT_BLOCK			0x08
+
+/* MMC device configuration */
+typedef struct tagSDCFG{
+	uint32_t sernum;		// serial number
+	uint32_t size;			// size=sectorsize*sectorcnt
+	uint32_t sectorcnt;		//
+	uint32_t sectorsize; 	// 512
+	uint32_t blocksize;		// erase block size
+	uint8_t ocr[4];			// OCR
+	uint8_t cid[16];		// CID
+	uint8_t csd[16];		// CSD
+} SDCFG;
+
+void rt_hw_sdcard_init(void);
+
+#endif

bsp/lpc176x/spi.c

@@ -0,0 +1,197 @@
+#include "LPC17xx.h"                              /* LPC17xx definitions    */
+#include "spi.h"
+
+/* bit definitions for register SSPCR0. */
+#define SSPCR0_DSS      0
+#define SSPCR0_CPOL     6
+#define SSPCR0_CPHA     7
+#define SSPCR0_SCR      8
+/* bit definitions for register SSPCR1. */
+#define SSPCR1_SSE      1
+/* bit definitions for register SSPSR. */
+#define SSPSR_TFE       0
+#define SSPSR_TNF       1
+#define SSPSR_RNE       2
+#define SSPSR_RFF       3
+#define SSPSR_BSY       4
+
+/* Local functions */
+static uint8_t LPC17xx_SPI_SendRecvByte (uint8_t byte_s);
+
+/* Initialize the SSP0, SSP0_PCLK=CCLK=72MHz */
+void LPC17xx_SPI_Init (void)
+{
+	uint32_t dummy;
+
+	dummy = dummy; // avoid warning
+
+	/* Initialize and enable the SSP0 Interface module. */
+	LPC_SC->PCONP |= (1 << 21);          /* Enable power to SSPI0 block  */
+
+	/* SSEL is GPIO, output set to high. */
+	LPC_GPIO0->FIODIR  |=  (1<<16);             /* P0.16 is output */
+	LPC_PINCON->PINSEL1 &= ~(3<<0);             /* P0.16 SSEL (used as GPIO) */
+	LPC17xx_SPI_DeSelect ();					/* set P0.16 high (SSEL inactiv) */
+
+	/* SCK, MISO, MOSI are SSP pins. */
+	LPC_PINCON->PINSEL0 &= ~(3UL<<30);          /* P0.15 cleared */
+	LPC_PINCON->PINSEL0 |=  (2UL<<30);          /* P0.15 SCK0 */
+	LPC_PINCON->PINSEL1 &= ~((3<<2) | (3<<4));  /* P0.17, P0.18 cleared */
+	LPC_PINCON->PINSEL1 |=  ((2<<2) | (2<<4));  /* P0.17 MISO0, P0.18 MOSI0 */
+
+	/* PCLK_SSP0=CCLK */
+	LPC_SC->PCLKSEL1 &= ~(3<<10);               /* PCLKSP0 = CCLK/4 (18MHz) */
+	LPC_SC->PCLKSEL1 |=  (1<<10);               /* PCLKSP0 = CCLK   (72MHz) */
+
+	LPC_SSP0->CR0  = 0x0007;                    /* 8Bit, CPOL=0, CPHA=0         */
+	LPC_SSP0->CR1  = 0x0002;                    /* SSP0 enable, master          */
+
+	LPC17xx_SPI_SetSpeed (SPI_SPEED_400kHz);
+
+	/* wait for busy gone */
+	while( LPC_SSP0->SR & ( 1 << SSPSR_BSY ) );
+
+	/* drain SPI RX FIFO */
+	while( LPC_SSP0->SR & ( 1 << SSPSR_RNE ) )
+	{
+		dummy = LPC_SSP0->DR;
+	}
+}
+
+/* Close SSP0 */
+void LPC17xx_SPI_DeInit( void )
+{
+	// disable SPI
+	LPC_SSP0->CR1  = 0;
+
+	// Pins to GPIO
+	LPC_PINCON->PINSEL0 &= ~(3UL<<30);
+	LPC_PINCON->PINSEL1 &= ~((3<<2) | (3<<4));
+
+	// disable SSP power
+	LPC_SC->PCONP &= ~(1 << 21);
+}
+
+/* Set a SSP0 clock speed to desired value. */
+void LPC17xx_SPI_SetSpeed (uint8_t speed)
+{
+	speed &= 0xFE;
+	if ( speed < 2  ) {
+		speed = 2 ;
+	}
+	LPC_SSP0->CPSR = speed;
+}
+
+/* SSEL: low */
+void LPC17xx_SPI_Select ()
+{
+	LPC_GPIO0->FIOPIN &= ~(1<<16);
+}
+
+/* SSEL: high */
+void LPC17xx_SPI_DeSelect ()
+{
+	LPC_GPIO0->FIOPIN |= (1<<16);
+}
+
+/* Send one byte then recv one byte of response. */
+static uint8_t LPC17xx_SPI_SendRecvByte (uint8_t byte_s)
+{
+	uint8_t byte_r;
+
+	LPC_SSP0->DR = byte_s;
+	while (LPC_SSP0->SR & (1 << SSPSR_BSY) /*BSY*/); 	/* Wait for transfer to finish */
+//	while( !( LPC_SSP0->SR & ( 1 << SSPSR_RNE ) ) );	/* Wait untill the Rx FIFO is not empty */
+	byte_r = LPC_SSP0->DR;
+
+	return byte_r;                      /* Return received value */
+}
+
+/* Send one byte */
+void LPC17xx_SPI_SendByte (uint8_t data)
+{
+	LPC17xx_SPI_SendRecvByte (data);
+}
+
+/* Recv one byte */
+uint8_t LPC17xx_SPI_RecvByte ()
+{
+	return LPC17xx_SPI_SendRecvByte (0xFF);
+}
+
+/* Release SSP0 */
+void LPC17xx_SPI_Release (void)
+{
+	LPC17xx_SPI_DeSelect ();
+	LPC17xx_SPI_RecvByte ();
+}
+
+
+#if USE_FIFO
+/* on LPC17xx the FIFOs have 8 elements which each can hold up to 16 bits */
+#define FIFO_ELEM 8
+
+/* Receive btr (must be multiple of 4) bytes of data and store in buff. */
+void LPC17xx_SPI_RecvBlock_FIFO (uint8_t *buff,	uint32_t btr)
+{
+	uint32_t hwtr, startcnt, i, rec;
+
+	hwtr = btr/2;  /* byte number in unit of short */
+	if ( btr < FIFO_ELEM ) {
+		startcnt = hwtr;
+	} else {
+		startcnt = FIFO_ELEM;
+	}
+
+	LPC_SSP0 -> CR0 |= 0x0f;  /* DSS to 16 bit */
+
+	for ( i = startcnt; i; i-- ) {
+		LPC_SSP0 -> DR = 0xffff;  /* fill TX FIFO, prepare clk for receive */
+	}
+
+	do {
+		while ( !(LPC_SSP0->SR & ( 1 << SSPSR_RNE ) ) ) {
+			// wait for data in RX FIFO (RNE set)
+		}
+		rec = LPC_SSP0->DR;
+		if ( i < ( hwtr - startcnt ) ) {
+			LPC_SSP0->DR = 0xffff;	/* fill TX FIFO, prepare clk for receive */
+		}
+		*buff++ = (uint8_t)(rec>>8);
+		*buff++ = (uint8_t)(rec);
+		i++;
+	} while ( i < hwtr );
+
+	LPC_SSP0->CR0 &= ~0x08;  /* DSS to 8 bit */
+}
+
+/* Send 512 bytes of data block (stored in buff). */
+void LPC17xx_SPI_SendBlock_FIFO (const uint8_t *buff)
+{
+	uint32_t cnt;
+	uint16_t data;
+
+	LPC_SSP0->CR0 |= 0x0f;  /* DSS to 16 bit */
+
+	/* fill the FIFO unless it is full */
+	for ( cnt = 0; cnt < ( 512 / 2 ); cnt++ )
+	{
+		/* wait for TX FIFO not full (TNF) */
+		while ( !( LPC_SSP0->SR & ( 1 << SSPSR_TNF ) ) );
+
+		data  = (*buff++) << 8;
+		data |= *buff++;
+		LPC_SSP0->DR = data;
+	}
+
+	/* wait for BSY gone */
+	while ( LPC_SSP0->SR & ( 1 << SSPSR_BSY ) );
+
+	/* drain receive FIFO */
+	while ( LPC_SSP0->SR & ( 1 << SSPSR_RNE ) ) {
+		data = LPC_SSP0->DR;
+	}
+
+	LPC_SSP0->CR0 &= ~0x08;  /* DSS to 8 bit */
+}
+#endif /* USE_FIFO */

bsp/lpc176x/spi.h

@@ -0,0 +1,31 @@
+#ifndef __LPC17XX_SPI_H__
+#define __LPC17XX_SPI_H__
+
+#include <stdint.h>
+#include <stdbool.h>
+
+// if not use FIFO, 	R: 600kB/s, W: 500kB/s
+// if     use FIFO,   	R: 1.2MB/s, W: 800kB/s
+#define USE_FIFO        1
+
+/* bit-frequency = PCLK / (CPSDVSR * [SCR+1]), here SCR=0, PCLK=72MHz, must be even	*/
+#define SPI_SPEED_20MHz		4	/* => 18MHz */
+#define SPI_SPEED_25MHz		4	/* => 18MHz */
+#define SPI_SPEED_400kHz  180	/* => 400kHz */
+
+/* external functions */
+void LPC17xx_SPI_Init (void);
+void LPC17xx_SPI_DeInit( void );
+void LPC17xx_SPI_Release (void);
+void LPC17xx_SPI_SetSpeed (uint8_t speed);
+void LPC17xx_SPI_Select (void);
+void LPC17xx_SPI_DeSelect (void);
+void LPC17xx_SPI_SendByte (uint8_t data);
+uint8_t LPC17xx_SPI_RecvByte (void);
+
+#if USE_FIFO
+void LPC17xx_SPI_RecvBlock_FIFO (uint8_t *buff,	uint32_t btr);
+void LPC17xx_SPI_SendBlock_FIFO (const uint8_t *buff);
+#endif
+
+#endif	// __LPC17XX_SPI_H__

bsp/lpc176x/startup.c

@@ -19,6 +19,10 @@
 #include "lpc17xx.h"
 #include "board.h"
 
+#ifdef RT_USING_DFS
+#include "sd.h"
+#endif
+
 /**
  * @addtogroup LPC17
  */
@@ -94,6 +98,9 @@ void rtthread_startup(void)
 	rt_system_scheduler_init();
 
 #ifdef RT_USING_DEVICE
+#ifdef RT_USING_DFS
+	rt_hw_sdcard_init();
+#endif
 	/* init all device */
 	rt_device_init_all();
 #endif