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/*
ChibiOS/RT - Copyright (C) 2006-2007 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/>.
*/
/**
* @file LPC214x/serial_lld.h
* @brief LPC214x low level serial driver header
* @addtogroup LPC214x_SERIAL
* @{
*/
#ifndef _SERIAL_LLD_H_
#define _SERIAL_LLD_H_
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @brief Serial buffers size.
* @details Configuration parameter, you can change the depth of the queue
* buffers depending on the requirements of your application.
* @note The default is 128 bytes for both the transmission and receive buffers.
*/
#if !defined(SERIAL_BUFFERS_SIZE) || defined(__DOXYGEN__)
#define SERIAL_BUFFERS_SIZE 128
#endif
/**
* @brief FIFO preload parameter.
* @details Configuration parameter, this values defines how many bytes are
* preloaded in the HW transmit FIFO for each interrupt, the maximum value is
* 16 the minimum is 2, the value 0 disables the feature.
* @note An high value reduces the number of interrupts generated but can
* also increase the worst case interrupt response time because the
* preload loops.
* @note The value zero disables the feature and reverts to a simpler code
* that will generate an interrupt for each output byte but is much
* smaller and simpler.
*/
#if !defined(UART_FIFO_PRELOAD) || defined(__DOXYGEN__)
#define UART_FIFO_PRELOAD 16
#endif
/**
* @brief UART0 driver enable switch.
* @details If set to @p TRUE the support for USART1 is included.
* @note The default is @p TRUE .
*/
#if !defined(USE_LPC214x_UART0) || defined(__DOXYGEN__)
#define USE_LPC214x_UART0 TRUE
#endif
/**
* @brief UART1 driver enable switch.
* @details If set to @p TRUE the support for USART2 is included.
* @note The default is @p TRUE.
*/
#if !defined(USE_LPC214x_UART1) || defined(__DOXYGEN__)
#define USE_LPC214x_UART1 TRUE
#endif
/**
* @brief UART1 interrupt priority level setting.
*/
#if !defined(LPC214x_UART1_PRIORITY) || defined(__DOXYGEN__)
#define LPC214x_UART1_PRIORITY 1
#endif
/**
* @brief UART2 interrupt priority level setting.
*/
#if !defined(LPC214x_UART2_PRIORITY) || defined(__DOXYGEN__)
#define LPC214x_UART2_PRIORITY 2
#endif
/*===========================================================================*/
/* Unsupported event flags and custom events. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* Serial Driver condition flags type.
*/
typedef uint32_t sdflags_t;
/**
* @brief @p SerialDriver specific data.
*/
struct _serial_driver_data {
/**
* Input queue, incoming data can be read from this input queue by
* using the queues APIs.
*/
InputQueue iqueue;
/**
* Output queue, outgoing data can be written to this output queue by
* using the queues APIs.
*/
OutputQueue oqueue;
/**
* Status Change @p EventSource. This event is generated when one or more
* condition flags change.
*/
EventSource sevent;
/**
* I/O driver status flags.
*/
sdflags_t flags;
/**
* Input circular buffer.
*/
uint8_t ib[SERIAL_BUFFERS_SIZE];
/**
* Output circular buffer.
*/
uint8_t ob[SERIAL_BUFFERS_SIZE];
};
/**
* @brief LPC214x Serial Driver configuration structure.
* @details An instance of this structure must be passed to @p sdStart()
* in order to configure and start a serial driver operations.
*/
typedef struct {
uint32_t speed;
uint32_t lcr;
uint32_t fcr;
} SerialDriverConfig;
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
/** @cond never*/
#if USE_LPC214x_UART0
extern SerialDriver SD1;
#endif
#if USE_LPC214x_UART1
extern SerialDriver SD2;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void sd_lld_init(void);
void sd_lld_start(SerialDriver *sdp, const SerialDriverConfig *config);
void sd_lld_stop(SerialDriver *sdp);
#ifdef __cplusplus
}
#endif
/** @endcond*/
#endif /* _SERIAL_LLD_H_ */
/** @} */
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