/* ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ /* Concepts and parts of this file have been contributed by Uladzimir Pylinsky aka barthess. */ /** * @file i2c.c * @brief I2C Driver code. * * @addtogroup I2C * @{ */ #include "hal.h" #if (HAL_USE_I2C == TRUE) || defined(__DOXYGEN__) /*===========================================================================*/ /* Driver local definitions. */ /*===========================================================================*/ /*===========================================================================*/ /* Driver exported variables. */ /*===========================================================================*/ /*===========================================================================*/ /* Driver local variables and types. */ /*===========================================================================*/ /*===========================================================================*/ /* 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->state = I2C_STOP; i2cp->config = NULL; #if I2C_USE_MUTUAL_EXCLUSION == TRUE osalMutexObjectInit(&i2cp->mutex); #endif #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) { osalDbgCheck((i2cp != NULL) && (config != NULL)); osalDbgAssert((i2cp->state == I2C_STOP) || (i2cp->state == I2C_READY) || (i2cp->state == I2C_LOCKED), "invalid state"); osalSysLock(); i2cp->config = config; i2c_lld_start(i2cp); i2cp->state = I2C_READY; osalSysUnlock(); } /** * @brief Deactivates the I2C peripheral. * * @param[in] i2cp pointer to the @p I2CDriver object * * @api */ void i2cStop(I2CDriver *i2cp) { osalDbgCheck(i2cp != NULL); osalDbgAssert((i2cp->state == I2C_STOP) || (i2cp->state == I2C_READY) || (i2cp->state == I2C_LOCKED), "invalid state"); osalSysLock(); i2c_lld_stop(i2cp); i2cp->state = I2C_STOP; osalSysUnlock(); } /** * @brief Returns the errors mask associated to the previous operation. * * @param[in] i2cp pointer to the @p I2CDriver object * @return The errors mask. * * @api */ i2cflags_t i2cGetErrors(I2CDriver *i2cp) { osalDbgCheck(i2cp != NULL); return i2c_lld_get_errors(i2cp); } /** * @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] 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[out] 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] timeout the number of ticks before the operation timeouts, * 
/*
    ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

/**
 * @file    chprintf.h
 * @brief   Mini printf-like functionality.
 *
 * @addtogroup chprintf
 * @{
 */

#ifndef CHPRINTF_H
#define CHPRINTF_H

#include <stdarg.h>

/**
 * @brief   Float type support.
 */
#if !defined(CHPRINTF_USE_FLOAT) || defined(__DOXYGEN__)
#define CHPRINTF_USE_FLOAT          FALSE
#endif

#ifdef __cplusplus
extern "C" {
#endif
  int chvprintf(BaseSequentialStream *chp, const char *fmt, va_list ap);
  int chprintf(BaseSequentialStream *chp, const char *fmt, ...);
  int chsnprintf(char *str, size_t size, const char *fmt, ...);
#ifdef __cplusplus
}
#endif

#endif /* CHPRINTF_H */

/** @} */
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