4 * Copyright 2003,2004 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 2000 Bernardo Innocenti <bernie@codewiz.org>
6 * This file is part of DevLib - See README.devlib for information.
9 * \brief High level serial I/O API
12 * \author Bernardo Innocenti <bernie@develer.com>
17 *#* Revision 1.26 2006/05/18 00:39:13 bernie
18 *#* Add struct Serial friendly typedef.
20 *#* Revision 1.25 2006/02/17 22:28:00 bernie
21 *#* Rename ser_emul.c to ser_posix.c.
23 *#* Revision 1.24 2006/02/17 22:23:06 bernie
24 *#* Update POSIX serial emulator.
26 *#* Revision 1.23 2005/11/27 23:33:40 bernie
27 *#* Use appconfig.h instead of cfg/config.h.
29 *#* Revision 1.22 2005/11/04 16:20:02 bernie
30 *#* Fix reference to README.devlib in header.
32 *#* Revision 1.21 2005/04/11 19:10:27 bernie
33 *#* Include top-level headers from cfg/ subdir.
35 *#* Revision 1.20 2005/01/22 04:20:01 bernie
38 *#* Revision 1.19 2005/01/11 18:08:16 aleph
39 *#* Add missing include
41 *#* Revision 1.18 2004/12/08 08:57:17 bernie
42 *#* Rename time_t to mtime_t.
44 *#* Revision 1.17 2004/11/16 21:54:56 bernie
45 *#* Changes for SC Monoboard support.
47 *#* Revision 1.16 2004/10/19 11:48:05 bernie
50 *#* Revision 1.15 2004/10/19 08:11:53 bernie
51 *#* SERRF_TX, SERRF_RX: New macros; Enhance documentation.
53 *#* Revision 1.14 2004/10/03 18:43:18 bernie
54 *#* Fix a nasty bug caused by confusion between old-style and new-style configuration macros.
56 *#* Revision 1.13 2004/09/14 21:04:57 bernie
57 *#* Don't vanely call kdebug.h.
59 *#* Revision 1.12 2004/09/06 21:40:50 bernie
60 *#* Move buffer handling in chip-specific driver.
62 *#* Revision 1.11 2004/08/25 14:12:08 rasky
63 *#* Aggiornato il comment block dei log RCS
65 *#* Revision 1.10 2004/08/24 16:20:48 bernie
66 *#* ser_read(): Make buffer argument void *#* for consistency with ANSI C and ser_write()
68 *#* Revision 1.9 2004/08/15 05:32:22 bernie
69 *#* ser_resync(): New function.
71 *#* Revision 1.8 2004/08/02 20:20:29 aleph
72 *#* Merge from project_ks
74 *#* Revision 1.7 2004/07/30 14:15:53 rasky
75 *#* Nuovo supporto unificato per detect della CPU
77 *#* Revision 1.6 2004/07/29 22:57:09 bernie
78 *#* ser_drain(): New function; Make Serial::is_open a debug-only feature; Switch to new-style CONFIG_* macros.
80 *#* Revision 1.5 2004/07/18 21:54:23 bernie
81 *#* Add ATmega8 support.
83 *#* Revision 1.4 2004/06/03 11:27:09 bernie
84 *#* Add dual-license information.
86 *#* Revision 1.3 2004/06/02 21:35:24 aleph
87 *#* Serial enhancements: interruptible receive handler and 8 bit serial status for AVR; remove volatile attribute to FIFOBuffer, useless for new fifobuf routens
89 *#* Revision 1.2 2004/05/23 18:21:53 bernie
90 *#* Trim CVS logs and cleanup header info.
96 #include <mware/fifobuf.h>
97 #include <cfg/compiler.h>
98 #include <cfg/macros.h> /* BV() */
100 #include <appconfig.h>
102 /*! \name Serial Error/status flags. */
105 typedef uint8_t serstatus_t;
107 /* Software errors */
108 #define SERRF_RXFIFOOVERRUN BV(0) /*!< Rx FIFO buffer overrun */
109 #define SERRF_RXTIMEOUT BV(5) /*!< Receive timeout */
110 #define SERRF_TXTIMEOUT BV(6) /*!< Transmit timeout */
114 * These flags map directly to the AVR UART Status Register (USR).
116 #define SERRF_RXSROVERRUN BV(3) /*!< Rx shift register overrun */
117 #define SERRF_FRAMEERROR BV(4) /*!< Stop bit missing */
118 #define SERRF_PARITYERROR BV(7) /*!< Parity error */
119 #define SERRF_NOISEERROR 0 /*!< Unsupported */
121 typedef uint16_t serstatus_t;
123 /* Software errors */
124 #define SERRF_RXFIFOOVERRUN BV(0) /*!< Rx FIFO buffer overrun */
125 #define SERRF_RXTIMEOUT BV(1) /*!< Receive timeout */
126 #define SERRF_TXTIMEOUT BV(2) /*!< Transmit timeout */
130 * These flags map directly to the SCI Control Register.
132 #define SERRF_PARITYERROR BV(8) /*!< Parity error */
133 #define SERRF_FRAMEERROR BV(9) /*!< Stop bit missing */
134 #define SERRF_NOISEERROR BV(10) /*!< Noise error */
135 #define SERRF_RXSROVERRUN BV(11) /*!< Rx shift register overrun */
137 typedef uint16_t serstatus_t;
139 /* Software errors */
140 #define SERRF_RXFIFOOVERRUN BV(0) /*!< Rx FIFO buffer overrun */
141 #define SERRF_RXTIMEOUT BV(1) /*!< Receive timeout */
142 #define SERRF_TXTIMEOUT BV(2) /*!< Transmit timeout */
144 /* Hardware errors */
145 #define SERRF_RXSROVERRUN 0 /*!< Unsupported in emulated serial port. */
146 #define SERRF_FRAMEERROR 0 /*!< Unsupported in emulated serial port. */
147 #define SERRF_PARITYERROR 0 /*!< Unsupported in emulated serial port. */
148 #define SERRF_NOISEERROR 0 /*!< Unsupported in emulated serial port. */
151 #error unknown architecture
155 /** Mask to group all RX errors. */
157 ( SERRF_RXFIFOOVERRUN \
159 | SERRF_RXSROVERRUN \
160 | SERRF_PARITYERROR \
164 /** Mask to group all TX errors. */
165 #define SERRF_TX (SERRF_TXTIMEOUT)
169 * \name Parity settings for ser_setparity().
171 * \note Values are AVR-specific for performance reasons.
172 * Other processors should either decode them or
173 * redefine these macros.
176 #define SER_PARITY_NONE 0
177 #define SER_PARITY_EVEN 2
178 #define SER_PARITY_ODD 3
182 * \name Serial hw numbers
188 #if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128
192 #elif CPU_AVR_ATMEGA103 || CPU_AVR_ATMEGA8
196 // \todo since we now support "fake" multiplexed serials, this should be moved to hw.h
204 #error unknown architecture
206 SER_CNT /*!< Number of serial ports */
211 struct SerialHardware;
213 /*! Human-readable serial error descriptions */
214 extern const char * const serial_errors[8];
216 /*! Serial handle structure */
217 typedef struct Serial
219 /*! Physical port number */
227 * \name Transmit and receive FIFOs.
229 * Declared volatile because handled asinchronously by interrupts.
237 #if CONFIG_SER_RXTIMEOUT != -1
240 #if CONFIG_SER_TXTIMEOUT != -1
244 /*! Holds the flags defined above. Will be 0 when no errors have occurred. */
247 /*! Low-level interface to hardware. */
248 struct SerialHardware* hw;
252 /* Function prototypes */
253 extern int ser_putchar(int c, struct Serial *port);
254 extern int ser_getchar(struct Serial *port);
255 extern int ser_getchar_nowait(struct Serial *port);
257 extern int ser_write(struct Serial *port, const void *buf, size_t len);
258 extern int ser_read(struct Serial *port, void *buf, size_t size);
260 extern int ser_print(struct Serial *port, const char *s);
261 extern int ser_printf(struct Serial *port, const char *format, ...) FORMAT(__printf__, 2, 3);
263 extern int ser_gets(struct Serial *port, char *buf, int size);
264 extern int ser_gets_echo(struct Serial *port, char *buf, int size, bool echo);
266 extern void ser_setbaudrate(struct Serial *port, unsigned long rate);
267 extern void ser_setparity(struct Serial *port, int parity);
268 extern void ser_settimeouts(struct Serial *port, mtime_t rxtimeout, mtime_t txtimeout);
269 extern void ser_resync(struct Serial *port, mtime_t delay);
270 extern void ser_purge(struct Serial *port);
271 extern void ser_drain(struct Serial *port);
273 extern struct Serial *ser_open(unsigned int unit);
274 extern void ser_close(struct Serial *port);
277 * \name Additional functions implemented as macros
281 #define ser_getstatus(h) ((h)->status)
282 #define ser_setstatus(h, x) ((h)->status = (x))
285 #endif /* DRV_SER_H */