180 lines
5.5 KiB
C
180 lines
5.5 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file LPC214x/serial_lld.h
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* @brief LPC214x low level serial driver header
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* @addtogroup LPC214x_SERIAL
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* @{
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*/
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#ifndef _SERIAL_LLD_H_
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#define _SERIAL_LLD_H_
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @brief Serial buffers size.
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* @details Configuration parameter, you can change the depth of the queue
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* buffers depending on the requirements of your application.
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* @note The default is 128 bytes for both the transmission and receive buffers.
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*/
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#if !defined(SERIAL_BUFFERS_SIZE) || defined(__DOXYGEN__)
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#define SERIAL_BUFFERS_SIZE 128
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#endif
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/**
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* @brief FIFO preload parameter.
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* @details Configuration parameter, this values defines how many bytes are
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* preloaded in the HW transmit FIFO for each interrupt, the maximum value is
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* 16 the minimum is 2, the value 0 disables the feature.
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* @note An high value reduces the number of interrupts generated but can
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* also increase the worst case interrupt response time because the
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* preload loops.
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* @note The value zero disables the feature and reverts to a simpler code
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* that will generate an interrupt for each output byte but is much
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* smaller and simpler.
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*/
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#if !defined(UART_FIFO_PRELOAD) || defined(__DOXYGEN__)
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#define UART_FIFO_PRELOAD 16
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#endif
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/**
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* @brief UART0 driver enable switch.
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* @details If set to @p TRUE the support for USART1 is included.
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* @note The default is @p TRUE .
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*/
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#if !defined(USE_LPC214x_UART0) || defined(__DOXYGEN__)
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#define USE_LPC214x_UART0 TRUE
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#endif
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/**
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* @brief UART1 driver enable switch.
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* @details If set to @p TRUE the support for USART2 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(USE_LPC214x_UART1) || defined(__DOXYGEN__)
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#define USE_LPC214x_UART1 TRUE
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#endif
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/**
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* @brief UART1 interrupt priority level setting.
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*/
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#if !defined(LPC214x_UART1_PRIORITY) || defined(__DOXYGEN__)
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#define LPC214x_UART1_PRIORITY 1
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#endif
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/**
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* @brief UART2 interrupt priority level setting.
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*/
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#if !defined(LPC214x_UART2_PRIORITY) || defined(__DOXYGEN__)
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#define LPC214x_UART2_PRIORITY 2
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#endif
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/*===========================================================================*/
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/* Unsupported event flags and custom events. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* Serial Driver condition flags type.
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*/
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typedef uint32_t sdflags_t;
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/**
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* @brief @p SerialDriver specific data.
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*/
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struct _serial_driver_data {
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/**
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* Input queue, incoming data can be read from this input queue by
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* using the queues APIs.
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*/
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InputQueue iqueue;
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/**
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* Output queue, outgoing data can be written to this output queue by
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* using the queues APIs.
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*/
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OutputQueue oqueue;
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/**
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* Status Change @p EventSource. This event is generated when one or more
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* condition flags change.
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*/
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EventSource sevent;
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/**
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* I/O driver status flags.
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*/
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sdflags_t flags;
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/**
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* Input circular buffer.
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*/
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uint8_t ib[SERIAL_BUFFERS_SIZE];
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/**
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* Output circular buffer.
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*/
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uint8_t ob[SERIAL_BUFFERS_SIZE];
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};
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/**
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* @brief Generic Serial Driver static initializer.
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* @details An instance of this structure must be passed to @p sdStart()
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* in order to configure and start a serial driver operations.
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*
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* @note This structure content is architecture dependent, each driver
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* implementation defines its own version and the custom static
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* initializers.
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*/
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typedef struct {
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uint32_t baud_rate;
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uint32_t lcr;
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uint32_t fcr;
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} SerialDriverConfig;
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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/** @cond never*/
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#if USE_LPC214x_UART0
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extern SerialDriver COM1;
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#endif
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#if USE_LPC214x_UART1
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extern SerialDriver COM2;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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void sd_lld_init(void);
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void sd_lld_start(SerialDriver *sdp, const SerialDriverConfig *config);
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void sd_lld_stop(SerialDriver *sdp);
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#ifdef __cplusplus
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}
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#endif
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/** @endcond*/
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#endif /* _SERIAL_LLD_H_ */
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/** @} */
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