uart_lld.h
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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 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 <http://www.gnu.org/licenses/>.
---
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes ChibiOS/RT, without being obliged to provide
the source code for any proprietary components. See the file exception.txt
for full details of how and when the exception can be applied.
*/
/**
* @file templates/uart_lld.h
* @brief UART Driver subsystem low level driver header template.
*
* @addtogroup UART
* @{
*/
#ifndef _UART_LLD_H_
#define _UART_LLD_H_
#if HAL_USE_UART || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief UART driver condition flags type.
*/
typedef uint32_t uartflags_t;
/**
* @brief Type of structure representing an UART driver.
*/
typedef struct UARTDriver UARTDriver;
/**
* @brief Generic UART notification callback type.
*
* @param[in] uartp pointer to the @p UARTDriver object
*/
typedef void (*uartcb_t)(UARTDriver *uartp);
/**
* @brief Character received UART notification callback type.
*
* @param[in] uartp pointer to the @p UARTDriver object triggering the
* callback
* @param[in] c received character
*/
typedef void (*uartccb_t)(UARTDriver *uartp, uint16_t c);
/**
* @brief Receive error UART notification callback type.
*
* @param[in] uartp pointer to the @p UARTDriver object triggering the
* callback
* @param[in] e receive error mask
*/
typedef void (*uartecb_t)(UARTDriver *uartp, uartflags_t e);
/**
* @brief Driver configuration structure.
* @note Implementations may extend this structure to contain more,
* architecture dependent, fields.
*/
typedef struct {
/**
* @brief End of transmission buffer callback.
*/
uartcb_t txend1_cb;
/**
* @brief Physical end of transmission callback.
*/
uartcb_t txend2_cb;
/**
* @brief Receive buffer filled callback.
*/
uartcb_t rxend_cb;
/**
* @brief Character received while out if the @p UART_RECEIVE state.
*/
uartccb_t rxchar_cb;
/**
* @brief Receive error callback.
*/
uartecb_t rxerr_cb;
/* End of the mandatory fields.*/
} UARTConfig;
/**
* @brief Structure representing an UART driver.
* @note Implementations may extend this structure to contain more,
* architecture dependent, fields.
*/
struct UARTDriver {
/**
* @brief Driver state.
*/
uartstate_t state;
/**
* @brief Transmitter state.
*/
uarttxstate_t txstate;
/**
* @brief Receiver state.
*/
uartrxstate_t rxstate;
/**
* @brief Current configuration data.
*/
const UARTConfig *config;
#if defined(UART_DRIVER_EXT_FIELDS)
UART_DRIVER_EXT_FIELDS
#endif
/* End of the mandatory fields.*/
};
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void uart_lld_init(void);
void uart_lld_start(UARTDriver *uartp);
void uart_lld_stop(UARTDriver *uartp);
void uart_lld_start_send(UARTDriver *uartp, size_t n, const void *txbuf);
size_t uart_lld_stop_send(UARTDriver *uartp);
void uart_lld_start_receive(UARTDriver *uartp, size_t n, void *rxbuf);
size_t uart_lld_stop_receive(UARTDriver *uartp);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_UART */
#endif /* _UART_LLD_H_ */
/** @} */