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 1.28 2006/07/21 10:58:00 batt
18 *#* Use timer_clock() instead of obsolete timer_ticks().
20 *#* Revision 1.27 2006/07/19 12:56:26 bernie
21 *#* Convert to new Doxygen style.
23 *#* Revision 1.26 2006/05/18 00:39:13 bernie
24 *#* Add struct Serial friendly typedef.
26 *#* Revision 1.25 2006/02/17 22:28:00 bernie
27 *#* Rename ser_emul.c to ser_posix.c.
29 *#* Revision 1.24 2006/02/17 22:23:06 bernie
30 *#* Update POSIX serial emulator.
32 *#* Revision 1.23 2005/11/27 23:33:40 bernie
33 *#* Use appconfig.h instead of cfg/config.h.
35 *#* Revision 1.22 2005/11/04 16:20:02 bernie
36 *#* Fix reference to README.devlib in header.
38 *#* Revision 1.21 2005/04/11 19:10:27 bernie
39 *#* Include top-level headers from cfg/ subdir.
41 *#* Revision 1.20 2005/01/22 04:20:01 bernie
44 *#* Revision 1.19 2005/01/11 18:08:16 aleph
45 *#* Add missing include
47 *#* Revision 1.18 2004/12/08 08:57:17 bernie
48 *#* Rename time_t to mtime_t.
50 *#* Revision 1.17 2004/11/16 21:54:56 bernie
51 *#* Changes for SC Monoboard support.
53 *#* Revision 1.16 2004/10/19 11:48:05 bernie
56 *#* Revision 1.15 2004/10/19 08:11:53 bernie
57 *#* SERRF_TX, SERRF_RX: New macros; Enhance documentation.
59 *#* Revision 1.14 2004/10/03 18:43:18 bernie
60 *#* Fix a nasty bug caused by confusion between old-style and new-style configuration macros.
62 *#* Revision 1.13 2004/09/14 21:04:57 bernie
63 *#* Don't vanely call kdebug.h.
65 *#* Revision 1.12 2004/09/06 21:40:50 bernie
66 *#* Move buffer handling in chip-specific driver.
68 *#* Revision 1.11 2004/08/25 14:12:08 rasky
69 *#* Aggiornato il comment block dei log RCS
71 *#* Revision 1.10 2004/08/24 16:20:48 bernie
72 *#* ser_read(): Make buffer argument void *#* for consistency with ANSI C and ser_write()
74 *#* Revision 1.9 2004/08/15 05:32:22 bernie
75 *#* ser_resync(): New function.
77 *#* Revision 1.8 2004/08/02 20:20:29 aleph
78 *#* Merge from project_ks
80 *#* Revision 1.7 2004/07/30 14:15:53 rasky
81 *#* Nuovo supporto unificato per detect della CPU
83 *#* Revision 1.6 2004/07/29 22:57:09 bernie
84 *#* ser_drain(): New function; Make Serial::is_open a debug-only feature; Switch to new-style CONFIG_* macros.
86 *#* Revision 1.5 2004/07/18 21:54:23 bernie
87 *#* Add ATmega8 support.
89 *#* Revision 1.4 2004/06/03 11:27:09 bernie
90 *#* Add dual-license information.
92 *#* Revision 1.3 2004/06/02 21:35:24 aleph
93 *#* Serial enhancements: interruptible receive handler and 8 bit serial status for AVR; remove volatile attribute to FIFOBuffer, useless for new fifobuf routens
95 *#* Revision 1.2 2004/05/23 18:21:53 bernie
96 *#* Trim CVS logs and cleanup header info.
102 #include <mware/fifobuf.h>
103 #include <cfg/compiler.h>
104 #include <cfg/macros.h> /* BV() */
106 #include <appconfig.h>
108 /** \name Serial Error/status flags. */
111 typedef uint8_t serstatus_t;
113 /* Software errors */
114 #define SERRF_RXFIFOOVERRUN BV(0) /**< Rx FIFO buffer overrun */
115 #define SERRF_RXTIMEOUT BV(5) /**< Receive timeout */
116 #define SERRF_TXTIMEOUT BV(6) /**< Transmit timeout */
120 * These flags map directly to the AVR UART Status Register (USR).
122 #define SERRF_RXSROVERRUN BV(3) /**< Rx shift register overrun */
123 #define SERRF_FRAMEERROR BV(4) /**< Stop bit missing */
124 #define SERRF_PARITYERROR BV(7) /**< Parity error */
125 #define SERRF_NOISEERROR 0 /**< Unsupported */
127 typedef uint16_t serstatus_t;
129 /* Software errors */
130 #define SERRF_RXFIFOOVERRUN BV(0) /**< Rx FIFO buffer overrun */
131 #define SERRF_RXTIMEOUT BV(1) /**< Receive timeout */
132 #define SERRF_TXTIMEOUT BV(2) /**< Transmit timeout */
136 * These flags map directly to the SCI Control Register.
138 #define SERRF_PARITYERROR BV(8) /**< Parity error */
139 #define SERRF_FRAMEERROR BV(9) /**< Stop bit missing */
140 #define SERRF_NOISEERROR BV(10) /**< Noise error */
141 #define SERRF_RXSROVERRUN BV(11) /**< Rx shift register overrun */
143 typedef uint16_t serstatus_t;
145 /* Software errors */
146 #define SERRF_RXFIFOOVERRUN BV(0) /**< Rx FIFO buffer overrun */
147 #define SERRF_RXTIMEOUT BV(1) /**< Receive timeout */
148 #define SERRF_TXTIMEOUT BV(2) /**< Transmit timeout */
150 /* Hardware errors */
151 #define SERRF_RXSROVERRUN 0 /**< Unsupported in emulated serial port. */
152 #define SERRF_FRAMEERROR 0 /**< Unsupported in emulated serial port. */
153 #define SERRF_PARITYERROR 0 /**< Unsupported in emulated serial port. */
154 #define SERRF_NOISEERROR 0 /**< Unsupported in emulated serial port. */
157 #error unknown architecture
161 /** Mask to group all RX errors. */
163 ( SERRF_RXFIFOOVERRUN \
165 | SERRF_RXSROVERRUN \
166 | SERRF_PARITYERROR \
170 /** Mask to group all TX errors. */
171 #define SERRF_TX (SERRF_TXTIMEOUT)
175 * \name Parity settings for ser_setparity().
177 * \note Values are AVR-specific for performance reasons.
178 * Other processors should either decode them or
179 * redefine these macros.
182 #define SER_PARITY_NONE 0
183 #define SER_PARITY_EVEN 2
184 #define SER_PARITY_ODD 3
188 * \name Serial hw numbers
194 #if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128
198 #elif CPU_AVR_ATMEGA103 || CPU_AVR_ATMEGA8
202 // \todo since we now support "fake" multiplexed serials, this should be moved to hw.h
210 #error unknown architecture
212 SER_CNT /**< Number of serial ports */
217 struct SerialHardware;
219 /** Human-readable serial error descriptions */
220 extern const char * const serial_errors[8];
222 /** Serial handle structure */
223 typedef struct Serial
225 /** Physical port number */
233 * \name Transmit and receive FIFOs.
235 * Declared volatile because handled asinchronously by interrupts.
243 #if CONFIG_SER_RXTIMEOUT != -1
246 #if CONFIG_SER_TXTIMEOUT != -1
250 /** Holds the flags defined above. Will be 0 when no errors have occurred. */
253 /** Low-level interface to hardware. */
254 struct SerialHardware* hw;
258 /* Function prototypes */
259 extern int ser_putchar(int c, struct Serial *port);
260 extern int ser_getchar(struct Serial *port);
261 extern int ser_getchar_nowait(struct Serial *port);
263 extern int ser_write(struct Serial *port, const void *buf, size_t len);
264 extern int ser_read(struct Serial *port, void *buf, size_t size);
266 extern int ser_print(struct Serial *port, const char *s);
267 extern int ser_printf(struct Serial *port, const char *format, ...) FORMAT(__printf__, 2, 3);
269 extern int ser_gets(struct Serial *port, char *buf, int size);
270 extern int ser_gets_echo(struct Serial *port, char *buf, int size, bool echo);
272 extern void ser_setbaudrate(struct Serial *port, unsigned long rate);
273 extern void ser_setparity(struct Serial *port, int parity);
274 extern void ser_settimeouts(struct Serial *port, mtime_t rxtimeout, mtime_t txtimeout);
275 extern void ser_resync(struct Serial *port, mtime_t delay);
276 extern void ser_purge(struct Serial *port);
277 extern void ser_drain(struct Serial *port);
279 extern struct Serial *ser_open(unsigned int unit);
280 extern void ser_close(struct Serial *port);
283 * \name Additional functions implemented as macros
287 #define ser_getstatus(h) ((h)->status)
288 #define ser_setstatus(h, x) ((h)->status = (x))
291 #endif /* DRV_SER_H */