4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2003,2004 Develer S.r.l. (http://www.develer.com/)
30 * Copyright 2000 Bernie Innocenti <bernie@codewiz.org>
34 * \brief High level serial I/O API.
36 * \author Bernie Innocenti <bernie@codewiz.org>
38 * $WIZ$ module_name = "ser"
39 * $WIZ$ module_depends = "kfile", "timer"
40 * $WIZ$ module_configuration = "bertos/cfg/cfg_ser.h"
41 * $WIZ$ module_hw = "bertos/hw/hw_ser.h"
42 * $WIZ$ module_supports = "not atmega103 and not atmega8"
49 #include <struct/fifobuf.h>
50 #include <cfg/compiler.h>
53 #include <cfg/macros.h> /* BV() */
55 typedef uint16_t serstatus_t;
58 #define SERRF_RXFIFOOVERRUN BV(0) /**< Rx FIFO buffer overrun */
59 #define SERRF_RXTIMEOUT BV(1) /**< Receive timeout */
60 #define SERRF_TXTIMEOUT BV(2) /**< Transmit timeout */
63 #define SERRF_RXSROVERRUN 0 /**< Rx shift register overrun, unsupported in emulated serial port. */
64 #define SERRF_FRAMEERROR 0 /**< Stop bit missing, unsupported in emulated serial port. */
65 #define SERRF_PARITYERROR 0 /**< Parity error, unsupported in emulated serial port. */
66 #define SERRF_NOISEERROR 0 /**< Noise error, unsupported in emulated serial port. */
73 SER_CNT /**< Number of serial ports */
77 #include CPU_HEADER(ser)
80 #include "cfg/cfg_ser.h"
85 * \name Masks to group TX/RX errors.
89 ( SERRF_RXFIFOOVERRUN \
94 | SERRF_NOISEERROR) /**< All possible rx errors */
95 #define SERRF_TX (SERRF_TXTIMEOUT) /**< All possible tx errors */
99 * \name LSB or MSB first data order for SPI driver.
101 * $WIZ$ ser_order_bit = "SER_MSB_FIRST", "SER_LSB_FIRST"
103 #define SER_MSB_FIRST 0
104 #define SER_LSB_FIRST 1
107 * \name Parity settings for ser_setparity().
109 * \note Values are AVR-specific for performance reasons.
110 * Other processors should either decode them or
111 * redefine these macros.
114 #define SER_PARITY_NONE 0
115 #define SER_PARITY_EVEN 2
116 #define SER_PARITY_ODD 3
121 * \def CONFIG_SER_STROBE
123 * This is a debug facility that can be used to
124 * monitor SER interrupt activity on an external pin.
126 * To use strobes, redefine the macros SER_STROBE_ON,
127 * SER_STROBE_OFF and SER_STROBE_INIT and set
128 * CONFIG_SER_STROBE to 1.
130 #if !defined(CONFIG_SER_STROBE) || !CONFIG_SER_STROBE
131 #define SER_STROBE_ON do {/*nop*/} while(0)
132 #define SER_STROBE_OFF do {/*nop*/} while(0)
133 #define SER_STROBE_INIT do {/*nop*/} while(0)
136 struct SerialHardware;
138 /** Human-readable serial error descriptions */
139 extern const char * const serial_errors[8];
141 /** Serial handle structure */
142 typedef struct Serial
144 /** Serial have a KFile struct implementation **/
147 /** Physical port number */
155 * \name Transmit and receive FIFOs.
157 * Declared volatile because handled asinchronously by interrupts.
165 #if CONFIG_SER_RXTIMEOUT != -1
168 #if CONFIG_SER_TXTIMEOUT != -1
172 /** Holds the flags defined above. Will be 0 when no errors have occurred. */
173 volatile serstatus_t status;
175 /** Low-level interface to hardware. */
176 struct SerialHardware* hw;
183 #define KFT_SERIAL MAKE_ID('S', 'E', 'R', 'L')
186 INLINE Serial * SERIAL_CAST(KFile *fd)
188 ASSERT(fd->_type == KFT_SERIAL);
192 /* Function prototypes */
193 //extern int ser_getchar_nowait(struct Serial *port);
195 void ser_setbaudrate(struct Serial *fd, unsigned long rate);
196 void ser_setparity(struct Serial *fd, int parity);
197 void ser_settimeouts(struct Serial *fd, mtime_t rxtimeout, mtime_t txtimeout);
198 void ser_resync(struct Serial *fd, mtime_t delay);
199 int ser_getchar_nowait(struct Serial *fd);
201 void ser_purgeRx(struct Serial *fd);
202 void ser_purgeTx(struct Serial *fd);
203 void ser_purge(struct Serial *fd);
204 void ser_init(struct Serial *fds, unsigned int unit);
205 void spimaster_init(Serial *fds, unsigned int unit);
209 * \name Additional functions implemented as macros
213 #define ser_getstatus(serial) ((serial)->status)
214 #define ser_setstatus(serial, new_status) ((serial)->status = (new_status))
217 #endif /* DRV_SER_H */