/* ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, 2011 Giovanni Di Sirio. This file is part of ChibiOS/RT. ChibiOS/RT is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. ChibiOS/RT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ /** * @file i2c.c * @brief I2C Driver code. * * @addtogroup I2C * @{ */ #include "ch.h" #include "hal.h" #if HAL_USE_I2C || defined(__DOXYGEN__) /*===========================================================================*/ /* Driver local definitions. */ /*===========================================================================*/ /*===========================================================================*/ /* Driver exported variables. */ /*===========================================================================*/ /*===========================================================================*/ /* Driver local variables. */ /*===========================================================================*/ /*===========================================================================*/ /* Driver local functions. */ /*===========================================================================*/ /*===========================================================================*/ /* Driver exported functions. */ /*===========================================================================*/ /** * @brief I2C Driver initialization. * @note This function is implicitly invoked by @p halInit(), there is * no need to explicitly initialize the driver. * * @init */ void i2cInit(void) { i2c_lld_init(); } /** * @brief Initializes the standard part of a @p I2CDriver structure. * * @param[out] i2cp pointer to the @p I2CDriver object * * @init */ void i2cObjectInit(I2CDriver *i2cp) { i2cp->id_state = I2C_STOP; i2cp->id_config = NULL; i2cp->rxbuf = NULL; i2cp->txbuf = NULL; i2cp->id_thread = NULL; #if I2C_USE_MUTUAL_EXCLUSION #if CH_USE_MUTEXES chMtxInit(&i2cp->id_mutex); #else chSemInit(&i2cp->id_semaphore, 1); #endif /* CH_USE_MUTEXES */ #endif /* I2C_USE_MUTUAL_EXCLUSION */ #if defined(I2C_DRIVER_EXT_INIT_HOOK) I2C_DRIVER_EXT_INIT_HOOK(i2cp); #endif } /** * @brief Configures and activates the I2C peripheral. * * @param[in] i2cp pointer to the @p I2CDriver object * @param[in] config pointer to the @p I2CConfig object * * @api */ void i2cStart(I2CDriver *i2cp, const I2CConfig *config) { chDbgCheck((i2cp != NULL) && (config != NULL), "i2cStart"); chDbgAssert((i2cp->id_state == I2C_STOP) || (i2cp->id_state == I2C_READY), "i2cStart(), #1", "invalid state"); chSysLock(); i2cp->id_config = config; i2c_lld_start(i2cp); i2cp->id_state = I2C_READY; chSysUnlock(); } /** * @brief Deactivates the I2C peripheral. * * @param[in] i2cp pointer to the @p I2CDriver object * * @api */ void i2cStop(I2CDriver *i2cp) { chDbgCheck(i2cp != NULL, "i2cStop"); chDbgAssert((i2cp->id_state == I2C_STOP) || (i2cp->id_state == I2C_READY), "i2cStop(), #1", "invalid state"); chSysLock(); i2c_lld_stop(i2cp); i2cp->id_state = I2C_STOP; chSysUnlock(); } /** * @brief Sends data via the I2C bus. * @details Function designed to realize "read-through-write" transfer * paradigm. If you want transmit data without any further read, * than set @b rxbytes field to 0. * * @param[in] i2cp pointer to the @p I2CDriver object * @param[in] slave_addr Slave device address (7 bits) without R/W bit * @param[in] txbuf pointer to transmit buffer * @param[in] txbytes number of bytes to be transmitted * @param[in] rxbuf pointer to receive buffer * @param[in] rxbytes number of bytes to be received, set it to 0 if * you want transmit only * @param[in] errors pointer to variable to store error code, zero means * no error. * @param[in] timeout operation timeout * * @return timeout status * @retval RDY_OK if timeout not reached * @retval RDY_TIMEOUT 
/*-----------------------------------------------------------------------
/  Low level disk interface module include file
/-----------------------------------------------------------------------*/

#ifndef _DISKIO

#define _READONLY	0	/* 1: Read-only mode */
#define _USE_IOCTL	0

#include "integer.h"
#include "ff.h"

#include "../DataflashManager.h"


/* Status of Disk Functions */
typedef BYTE	DSTATUS;

/* Results of Disk Functions */
typedef enum {
	RES_OK = 0,		/* 0: Successful */
	RES_ERROR,		/* 1: R/W Error */
	RES_WRPRT,		/* 2: Write Protected */
	RES_NOTRDY,		/* 3: Not Ready */
	RES_PARERR		/* 4: Invalid Parameter */
} DRESULT;


/*---------------------------------------*/
/* Prototypes for disk control functions */

DSTATUS disk_initialize (BYTE);
DSTATUS disk_status (BYTE);
DRESULT disk_read (BYTE, BYTE*, DWORD, BYTE);
#if	_READONLY == 0
DRESULT disk_write (BYTE, const BYTE*, DWORD, BYTE);
#endif
DRESULT disk_ioctl (BYTE, BYTE, void*);


/* Disk Status Bits (DSTATUS) */

#define STA_NOINIT		0x01	/* Drive not initialized */
#define STA_NODISK		0x02	/* No medium in the drive */
#define STA_PROTECT		0x04	/* Write protected */


#define _DISKIO
#endif
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