Diff: SPI/SDCard/spi_sdcard.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SPI/SDCard/spi_sdcard.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,606 @@
+/******************** (C) COPYRIGHT 2010 NXPSemiconductors ************
+ * @file		spi_sdcard.c
+ * @purpose		This example describes how to use SPI at mode SPI master/8bit
+ * 			  	on LPC1768 to communicate with SC16IS750/760 Demo board
+ * 			  	in interrupt mode
+ * @version		1.0
+ * @date		16. July. 2010
+ * @author		NXP MCU SW Application Team
+ *---------------------------------------------------------------------
+ * Software that is described herein is for illustrative purposes only
+ * which provides customers with programming information regarding the
+ * products. This software is supplied "AS IS" without any warranties.
+ * NXP Semiconductors assumes no responsibility or liability for the
+ * use of the software, conveys no license or title under any patent,
+ * copyright, or mask work right to the product. NXP Semiconductors
+ * reserves the right to make changes in the software without
+ * notification. NXP Semiconductors also make no representation or
+ * warranty that such application will be suitable for the specified
+ * use without further testing or modification.
+ **********************************************************************/
+#include "lpc17xx_spi.h"
+#include "lpc17xx_libcfg.h"
+#include "lpc17xx_pinsel.h"
+#include "debug_frmwrk.h"
+#include "lpc17xx_gpio.h"
+
+/* Example group ----------------------------------------------------------- */
+/** @defgroup SPI_SDCard		SDCard
+ * @ingroup SPI_Examples
+ * @{
+ */
+
+/************************** PRIVATE DEFINTIONS *********************/
+// PORT number that /CS pin assigned on
+#define CS_PORT_NUM		0
+// PIN number that  /CS pin assigned on
+#define CS_PIN_NUM		16
+
+#define SD_DETECT_PORTNUM	4
+#define SD_DETECT_PINNUM	29
+typedef enum _sd_connect_status
+{
+	SD_CONNECTED,
+	SD_DISCONNECTED
+}sd_connect_status;
+typedef enum _sd_error
+{
+	SD_OK,
+	SD_NG,
+	SD_CMD_BAD_PARAMETER,
+	SD_ERROR_TOKEN,
+	SD_ERROR_TIMEOUT,
+	SD_ERROR_BUS_NOT_IDLE,
+	SD_ERROR_CMD0,
+	SD_ERROR_CMD55,
+	SD_ERROR_ACMD41,
+	SD_ERROR_CMD59,
+}sd_error;
+
+//SD command code
+#define 	CMD0_GO_IDLE_STATE            0x00
+#define		CMD1_SEND_OPCOND              0x01
+#define 	CMD9_SEND_CSD                 0x09
+#define 	CMD10_SEND_CID                0x0a
+#define  	CMD12_STOP_TRANSMISSION       0x0b
+#define 	CMD13_SEND_STATUS             0x0c
+#define 	CMD16_SET_BLOCKLEN            0x10
+#define 	CMD17_READ_SINGLE_BLOCK       0x11
+#define 	CMD18_READ_MULTIPLE_BLOCK     0x12
+#define 	CMD24_WRITE_BLOCK             0x18
+#define 	CMD25_WRITE_MULTIPLE_BLOCK    0x19
+#define 	CMD27_PROGRAM_CSD             0x1b
+#define 	CMD28_SET_WRITE_PROT          0x1c
+#define 	CMD29_CLR_WRITE_PROT          0x1d
+#define 	CMD30_SEND_WRITE_PROT         0x1e
+#define 	CMD32_ERASE_WR_BLK_START_ADDR 0x20
+#define 	CMD33_ERASE_WR_BLK_END_ADDR   0x21
+#define 	CMD38_ERASE                   0x26
+#define 	CMD55_APP_CMD                 0x37
+#define 	CMD56_GEN_CMD                 0x38
+#define 	CMD58_READ_OCR                0x3a
+#define 	CMD59_CRC_ON_OFF              0x3b
+/* Application-specific commands (always prefixed with CMD55_APP_CMD) */
+#define	 	ACMD13_SD_STATUS              0x0d
+#define 	ACMD22_SEND_NUM_WR_BLOCKS     0x16
+#define 	ACMD23_SET_WR_BLK_ERASE_COUNT 0x17
+#define 	ACMD41_SEND_OP_COND           0x29
+#define 	ACMD42_SET_CLR_CARD_DETECT    0x2a
+#define 	ACMD51_SEND_SCR               0x33
+/* R1 format responses (ORed together as a bit-field) */
+#define 	R1_NOERROR   				  0x00
+#define 	R1_IDLE      				  0x01
+#define 	R1_ERASE     				  0x02
+#define 	R1_ILLEGAL   				  0x04
+#define 	R1_CRC_ERR   				  0x08
+#define 	R1_ERASE_SEQ 				  0x10
+#define 	R1_ADDR_ERR  				  0x20
+#define 	R1_PARAM_ERR 				  0x40
+/* R2 format responses - second byte only, first is identical to R1 */
+#define 	R2_LOCKED      				  0x01
+#define 	R2_WP_FAILED   				  0x02
+#define 	R2_ERROR       				  0x04
+#define 	R2_CTRL_ERR    				  0x08
+#define 	R2_ECC_FAIL    				  0x10
+#define 	R2_WP_VIOL     				  0x20
+#define 	R2_ERASE_PARAM 				  0x40
+#define 	R2_RANGE_ERR   				  0x80
+
+#define GETBIT(in, bit) ((in & (1<<bit)) >> bit)
+#define SD_CMD_BLOCK_LENGTH		6
+#define SD_DATA_BLOCK_LENGTH	515
+#define SD_WAIT_R1_TIMEOUT		100000
+/************************** PRIVATE VARIABLES *************************/
+uint8_t menu1[] =
+"********************************************************************************\n\r"
+"Hello NXP Semiconductors \n\r"
+"SPI communicate with SD card demo \n\r"
+"\t - MCU: LPC17xx \n\r"
+"\t - Core: ARM Cortex-M3 \n\r"
+"\t - Communicate via: UART0 - 115200bps \n\r"
+" Demo SPI module, read SD card's CID register and display via UART0\n\r"
+"********************************************************************************\n\r";
+// SPI Configuration structure variable
+SPI_CFG_Type SPI_ConfigStruct;
+// SPI Data Setup structure variable
+SPI_DATA_SETUP_Type xferConfig;
+
+uint8_t sd_cmd_buf[SD_CMD_BLOCK_LENGTH];
+uint8_t sd_data_buf[SD_DATA_BLOCK_LENGTH];
+/************************** PRIVATE FUNCTIONS *************************/
+void CS_Init(void);
+void CS_Force(int32_t state);
+void print_menu(void);
+sd_connect_status SD_GetCardConnectStatus(void);
+uint8_t crc_7(uint8_t old_crc, uint8_t data);
+uint8_t crc_7final(uint8_t old_crc);
+uint32_t SD_SendReceiveData_Polling(void* tx_buf, void* rx_buf, uint32_t length);
+void SD_SendCommand(uint8_t cmd, uint8_t *arg);
+sd_error SD_WaitR1(uint8_t *buffer, uint32_t length, uint32_t timeout);
+sd_error SD_WaitDeviceIdle(uint32_t num_char);
+sd_error SD_Init(uint8_t retries);
+sd_error SD_GetCID(void);
+/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/
+
+/*-------------------------PRIVATE FUNCTIONS------------------------------*/
+
+/*********************************************************************//**
+ * @brief 		Initialize CS pin as GPIO function to drive /CS pin
+ * 				due to definition of CS_PORT_NUM and CS_PORT_NUM
+ * @param		None
+ * @return		None
+ ***********************************************************************/
+void CS_Init(void)
+{
+	GPIO_SetDir(CS_PORT_NUM, (1<<CS_PIN_NUM), 1);
+	GPIO_SetValue(CS_PORT_NUM, (1<<CS_PIN_NUM));
+}
+/*********************************************************************//**
+ * @brief 		Drive CS output pin to low/high level to select slave device
+ * 				via /CS pin state
+ * @param[in]	state State of CS output pin that will be driven:
+ * 				- 0: Drive CS pin to low level
+ * 				- 1: Drive CS pin to high level
+ * @return		None
+ ***********************************************************************/
+void CS_Force(int32_t state)
+{
+	if (state){
+		GPIO_SetValue(CS_PORT_NUM, (1<<CS_PIN_NUM));
+	}else{
+		GPIO_ClearValue(CS_PORT_NUM, (1<<CS_PIN_NUM));
+	}
+}
+/*********************************************************************//**
+ * @brief		Print Welcome menu
+ * @param[in]	none
+ * @return 		None
+ **********************************************************************/
+void print_menu(void)
+{
+	_DBG(menu1);
+}
+/*********************************************************************//**
+ * @brief		check if SD card is inserted or not
+ * @param[in]	none
+ * @return 		SD_CONNECTED or SD_DISCONNECTED
+ **********************************************************************/
+sd_connect_status SD_GetCardConnectStatus(void)
+{
+	sd_connect_status ret=SD_DISCONNECTED;
+
+	if((GPIO_ReadValue(SD_DETECT_PORTNUM)&(1<<SD_DETECT_PINNUM))== 0)
+		ret = SD_CONNECTED;
+
+	return ret;
+}
+/*********************************************************************//**
+ * @brief		Calculate CRC-7 as required by SD specification
+ * @param[in]	- old_crc: 0x00 to start new CRC
+ * 			    or value from previous call to continue.
+ * 				- data: data byte to add to CRC computation
+ * @return 		CRC-7 checksum which MUST be augmented by crc_7augment() before used
+ **********************************************************************/
+uint8_t crc_7(uint8_t old_crc, uint8_t data)
+{
+  uint8_t new_crc,x;
+
+  new_crc = old_crc;
+  for (x = 7; x >= 0; x--) {
+    new_crc <<= 1;
+    new_crc |= GETBIT(data,x);
+    if (GETBIT(new_crc, 7) == 1) {
+      new_crc ^= 0x89; /*CRC-7's polynomial is x^7 + x^3 + 1*/
+    }
+    if(x==0) break;
+  }
+  return new_crc;
+}
+/*********************************************************************//**
+ * @brief		Provides the zero-padding final step to CRC-7
+ * @param[in]	- old_crc: value from last crc_7()call
+ * @return 		Finalized CRC-7 checksum
+ **********************************************************************/
+uint8_t crc_7final(uint8_t old_crc)
+{
+  uint8_t new_crc,x;
+
+  new_crc = old_crc;
+  for (x = 0; x < 7; x++) {
+    new_crc <<= 1;
+    if (GETBIT(new_crc, 7) == 1) {
+      new_crc ^= 0x89; /*CRC-7's polynomial is x^7 + x^3 + 1*/
+    }
+  }
+  return new_crc;
+}
+/*********************************************************************//**
+ * @brief		Send/receive data over SPI bus
+ * @param[in]	- tx_buf: pointer to transmit buffer.
+ * 					      NULL if send 0xFF.
+ * 				- rx_buf: pointer to receive buffer
+ * 						  NULL if nothing to receive.
+ * 			    - length: number of data to send or receive
+ * @return 		the actual data sent or received.
+ **********************************************************************/
+uint32_t SD_SendReceiveData_Polling(void* tx_buf, void* rx_buf, uint32_t length)
+{
+	//uint16_t i;
+
+	CS_Force(0);
+	//for(i=0;i<1000;i++);
+
+	xferConfig.tx_data = tx_buf;
+	xferConfig.rx_data = rx_buf;
+	xferConfig.length = length;
+	SPI_ReadWrite(LPC_SPI, &xferConfig, SPI_TRANSFER_POLLING);
+
+	//for(i=0;i<1000;i++);
+	CS_Force(1);
+	return xferConfig.counter;
+}
+/*********************************************************************//**
+ * @brief		Send command to SD card
+ * @param[in]	- cmd: SD command code
+ * 			    - arg: pointer to array of 4x8 bytes, argument of command
+ * @return 		n/a
+ **********************************************************************/
+void SD_SendCommand(uint8_t cmd, uint8_t *arg)
+{
+	uint8_t crc = 0x00;
+
+	/* First byte has framing bits and command */
+	sd_cmd_buf[0] = 0x40 | (cmd & 0x3f);
+	sd_cmd_buf[1] = arg[0];
+	sd_cmd_buf[2] = arg[1];
+	sd_cmd_buf[3] = arg[2];
+	sd_cmd_buf[4] = arg[3];
+	//calculate CRC
+	crc = crc_7(crc, sd_cmd_buf[0]);//start new crc-7
+	crc = crc_7(crc, sd_cmd_buf[1]);
+	crc = crc_7(crc, sd_cmd_buf[2]);
+	crc = crc_7(crc, sd_cmd_buf[3]);
+	crc = crc_7(crc, sd_cmd_buf[4]);
+	crc = crc_7final(crc);
+	sd_cmd_buf[5] = (crc << 1) | 0x01;//stop bit
+
+	SD_SendReceiveData_Polling(sd_cmd_buf,NULL,SD_CMD_BLOCK_LENGTH);
+}
+/*********************************************************************//**
+ * @brief		Wait for SD card R1 response
+ * @param[in]	- buffer: pointer to receive buffer
+ * 			    - length: length of receive data, must equal 1+actual length of data
+ * 					      length = 0 if receive R1 only
+ * 				- timeout: timeout for retry
+ * @return 		error code
+ **********************************************************************/
+sd_error SD_WaitR1(uint8_t *buffer, uint32_t length, uint32_t timeout)
+{
+    uint32_t j;
+	uint8_t dummy[2];
+	uint8_t wait_idle;
+
+	/* No null pointers allowed */
+	if (buffer == NULL)	return SD_CMD_BAD_PARAMETER;
+
+	/* Wait for start bit on R1 */
+	j=0;dummy[0]=0xFF;
+	while (GETBIT(dummy[0],7) == 1)
+	{
+		if (j>timeout)return SD_ERROR_TIMEOUT;
+		dummy[0]=0x00;
+		SD_SendReceiveData_Polling(NULL,dummy,1);
+		j++;
+	}
+	*buffer=dummy[0];//store R1
+	if (length > 0)//read followed data
+	{
+		/* Wait for start token on data portion, if any */
+		dummy[0] = 0xff;j = 0;
+		while (dummy[0] != 0xfe)
+		{
+			if (j > timeout)return SD_ERROR_TIMEOUT;
+			dummy[0]=0x00;
+			SD_SendReceiveData_Polling(NULL,dummy,1);
+			if ((dummy[0] != 0xff) && (dummy[0] != 0xfe)) // not idle or start token?
+			{
+				return SD_ERROR_TOKEN;
+			}
+			j++;
+		}
+		/* Read all bytes */
+		SD_SendReceiveData_Polling(NULL,(buffer+1),(length - 1));
+	}
+	/* Some more bit clocks to finish internal SD operations */
+	dummy[0]=0x00;wait_idle=0;
+	while((dummy[0]!=0xff)&&(wait_idle<20))
+	{
+		dummy[0]=0x00;
+		SD_SendReceiveData_Polling(NULL,dummy,1);
+		for(j=0;j<1000;j++);
+		wait_idle++;
+	}
+	if(wait_idle>=20) return SD_ERROR_BUS_NOT_IDLE;
+	return SD_OK;
+}
+/*********************************************************************//**
+ * @brief		Wait for SD card idle
+ * @param[in]	- num_char: number characters (8 bits clock) to wait
+ * @return 		device already in idle state or need more time
+ **********************************************************************/
+sd_error SD_WaitDeviceIdle(uint32_t num_char)
+{
+	uint8_t dummy[2]={0,0};
+	uint32_t i=0;
+
+	while ((i < num_char) && (dummy[0] != 0xff))
+	{
+		dummy[0]=0x00;
+		SD_SendReceiveData_Polling(NULL,dummy,1);
+		if (dummy[0] == 0xff)
+		{
+			dummy[0]= 0x00;
+			SD_SendReceiveData_Polling(NULL,dummy,1);
+			if (dummy[0] == 0xff)
+			{
+				dummy[0]= 0x00;
+				SD_SendReceiveData_Polling(NULL,dummy,1);
+			}
+		}
+		i++;
+	}
+	if (dummy[0] != 0xff)return SD_ERROR_TIMEOUT;
+
+	return SD_OK;
+}
+/*********************************************************************//**
+ * @brief		Initialize SD card in SPI mode
+ * @param[in]	- retries: number retry time
+ * @return 		initialization successful or terminated with specific error code
+ **********************************************************************/
+sd_error SD_Init(uint8_t retries)
+{
+	uint8_t rxdata,errors;
+	uint8_t SD_arg[4]={0,0,0,0};
+	uint16_t i;
+
+	// initialize SPI configuration structure to default
+	SPI_ConfigStructInit(&SPI_ConfigStruct);
+	// Initialize SPI peripheral with parameter given in structure above
+	SPI_Init(LPC_SPI, &SPI_ConfigStruct);
+	// Initialize /CS pin to GPIO function
+	CS_Init();
+	// check for SD card insertion
+	_DBG("\n\rPlease plug-in SD card!");
+	while(SD_GetCardConnectStatus()==SD_DISCONNECTED);
+	_DBG("...Connected!\n\r");
+	// Wait for bus idle
+	if(SD_WaitDeviceIdle(160) != SD_OK) return SD_ERROR_BUS_NOT_IDLE;
+	_DBG("Initialize SD card in SPI mode...");
+
+	errors = 0;
+	/* Send the CMD0_GO_IDLE_STATE while CS is asserted */
+	/* This signals the SD card to fall back to SPI mode */
+	while(errors < retries)
+	{
+		SD_SendCommand(CMD0_GO_IDLE_STATE, SD_arg);
+		if(SD_WaitR1(&rxdata,0,1000)!= SD_OK)
+		{
+			errors++;
+			continue;
+		}
+		if(rxdata != R1_IDLE)
+		{
+			errors++;
+			continue;
+		}
+		else break;
+	}
+	if(errors >= retries)return SD_ERROR_CMD0;
+
+	/* Check if the card is not MMC */
+	/* Start its internal initialization process */
+	while(1)
+	{
+		SD_SendCommand(CMD55_APP_CMD, SD_arg);
+		if(SD_WaitR1(&rxdata,0,1000)!= SD_OK) return SD_ERROR_CMD55;
+
+		SD_SendCommand(ACMD41_SEND_OP_COND, SD_arg);
+		SD_WaitR1(&rxdata,0,1000);
+		if (rxdata & R1_IDLE) //in_idle_state = 1
+			for (i = 0; i < 1000; i++); /* wait for a while */
+		else break; //in_idle_state=0 --> ready
+	}
+	/* Enable CRC */
+	SD_arg[3] = 0x01;
+	SD_SendCommand(CMD59_CRC_ON_OFF, SD_arg);
+	if(SD_WaitR1(&rxdata,0,1000)!= SD_OK) return SD_ERROR_CMD59;
+	if(rxdata != R1_NOERROR) return SD_ERROR_CMD59;
+
+	return SD_OK;
+}
+/*********************************************************************//**
+ * @brief		Get SD card's CID register
+ * @param[in]	none
+ * @return 		OK or NG
+ * 				OK: the returned data from SD card is stored in sd_data_buf
+ **********************************************************************/
+sd_error SD_GetCID(void)
+{
+	uint8_t SD_arg[4]={0,0,0,0};
+
+	SD_SendCommand(CMD10_SEND_CID, SD_arg);
+	if(SD_WaitR1(sd_data_buf,18,1000)!= SD_OK) return SD_NG;
+	if(sd_data_buf[0]!= R1_NOERROR) return SD_NG;
+	return SD_OK;
+}
+/*-------------------------MAIN FUNCTION------------------------------*/
+/*********************************************************************//**
+ * @brief		c_entry: Main SPI program body
+ * @param[in]	None
+ * @return 		int
+ **********************************************************************/
+int c_entry(void)
+{
+	PINSEL_CFG_Type PinCfg;
+	sd_error sd_status;
+	uint8_t i;
+	uint8_t tem8;
+	uint32_t tem32;
+	/*
+	 * Initialize SPI pin connect
+	 * P0.15 - SCK;
+	 * P0.16 - SSEL - used as GPIO
+	 * P0.17 - MISO
+	 * P0.18 - MOSI
+	 */
+	PinCfg.Funcnum = 3;
+	PinCfg.OpenDrain = 0;
+	PinCfg.Pinmode = 0;
+	PinCfg.Portnum = 0;
+	PinCfg.Pinnum = 15;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 17;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 18;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 16;
+	PinCfg.Funcnum = 0;
+	PINSEL_ConfigPin(&PinCfg);
+	//Initialize SD card detection pin P4.29
+	PinCfg.Portnum = 4;
+	PinCfg.Pinnum = 29;
+	PinCfg.Funcnum = 0;//GPIO function
+	PINSEL_ConfigPin(&PinCfg);
+	GPIO_SetDir(SD_DETECT_PORTNUM, (1<<SD_DETECT_PINNUM), 0);//input
+
+	/* Initialize debug via UART0
+	 * – 115200bps
+	 * – 8 data bit
+	 * – No parity
+	 * – 1 stop bit
+	 * – No flow control
+	 */
+	debug_frmwrk_init();
+
+	// print welcome screen
+	print_menu();
+
+	//initialize SD card
+	sd_status = SD_Init(10);
+	switch(sd_status)
+	{
+	case SD_ERROR_CMD0:
+		_DBG("Fail CMD0\n\r");
+		break;
+	case SD_ERROR_CMD55:
+		_DBG("Fail CMD55\n\r");
+		break;
+	case SD_ERROR_ACMD41:
+		_DBG("Fail ACMD41\n\r");
+		break;
+	case SD_ERROR_CMD59:
+		_DBG("Fail CMD59\n\r");
+		break;
+	case SD_ERROR_BUS_NOT_IDLE:
+		_DBG("Fail...Device is not in idle state.\n\r");
+		break;
+	case SD_OK:
+		_DBG("Done!\n\r");
+		break;
+	default:
+		_DBG("Fail\n\r");
+		break;
+	}
+	if(sd_status == SD_OK)
+	{
+		//Clear receive buffer
+		for(i=1;i<18;i++)sd_data_buf[i]=0;
+
+		_DBG("Reading SD card's CID register...");
+		if(SD_GetCID()!= SD_OK)
+		{
+			_DBG("Fail\n\r");
+			SPI_DeInit(LPC_SPI);
+		}
+		else
+		{
+			_DBG("Done!");
+			_DBG("\n\rManufacture ID: ");_DBH(sd_data_buf[1]);
+			_DBG("\n\rApplication ID: ");_DBC(sd_data_buf[2]);_DBC(sd_data_buf[3]);
+			_DBG("\n\rProduct name: ");
+				for(i=4;i<9;i++) _DBC(sd_data_buf[i]);
+			_DBG("\n\rProduct revision: ");
+				tem8 = (sd_data_buf[9]&0xF0)>>4;_DBD(tem8);
+				_DBG(".");
+				tem8 = (sd_data_buf[9]&0x0F);_DBD(tem8);
+			_DBG("\n\rProduct serial number: ");
+				tem32= (sd_data_buf[13]<<24)|(sd_data_buf[12]<<16)|
+						(sd_data_buf[11]<<8)|(sd_data_buf[10]<<0);
+				_DBH32(tem32);
+			_DBG("\n\rManufacturing date: ");
+				tem8 = (sd_data_buf[15]&0x0F);_DBD(tem8);
+				_DBG("/");
+				tem8 = ((sd_data_buf[14]&0x0F)<<4) | ((sd_data_buf[15]&0xF0)>>4);
+				_DBG("2");_DBD(tem8);
+		}
+	}
+	else
+    // DeInitialize SPI peripheral
+		SPI_DeInit(LPC_SPI);
+    /* Loop forever */
+    while(1);
+    return 1;
+}
+
+/* With ARM and GHS toolsets, the entry point is main() - this will
+   allow the linker to generate wrapper code to setup stacks, allocate
+   heap area, and initialize and copy code and data segments. For GNU
+   toolsets, the entry point is through __start() in the crt0_gnu.asm
+   file, and that startup code will setup stacks and data */
+int main(void)
+{
+    return c_entry();
+}
+
+
+#ifdef  DEBUG
+/*******************************************************************************
+* @brief		Reports the name of the source file and the source line number
+* 				where the CHECK_PARAM error has occurred.
+* @param[in]	file Pointer to the source file name
+* @param[in]    line assert_param error line source number
+* @return		None
+*******************************************************************************/
+void check_failed(uint8_t *file, uint32_t line)
+{
+	/* User can add his own implementation to report the file name and line number,
+	 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+
+	/* Infinite loop */
+	while(1);
+}
+#endif
+/*
+ * @}
+ */