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 1.35 2007/01/27 20:47:12 batt
20 *#* Revision 1.34 2006/11/20 15:07:40 batt
21 *#* Revert unneeded locked functions.
23 *#* Revision 1.33 2006/11/17 17:03:58 batt
24 *#* Implement ser_setstatus and ser_getstatus as functions to avoid race conditions.
26 *#* Revision 1.32 2006/11/17 16:01:12 batt
27 *#* Serial status MUST be volatile.
29 *#* Revision 1.31 2006/09/13 18:22:48 bernie
32 *#* Revision 1.30 2006/09/13 18:21:23 bernie
33 *#* Add configurable SPI pin mapping.
35 *#* Revision 1.29 2006/09/13 13:59:11 bernie
36 *#* Documentation fixes.
38 *#* Revision 1.28 2006/07/21 10:58:00 batt
39 *#* Use timer_clock() instead of obsolete timer_ticks().
41 *#* Revision 1.27 2006/07/19 12:56:26 bernie
42 *#* Convert to new Doxygen style.
44 *#* Revision 1.26 2006/05/18 00:39:13 bernie
45 *#* Add struct Serial friendly typedef.
47 *#* Revision 1.25 2006/02/17 22:28:00 bernie
48 *#* Rename ser_emul.c to ser_posix.c.
50 *#* Revision 1.24 2006/02/17 22:23:06 bernie
51 *#* Update POSIX serial emulator.
53 *#* Revision 1.23 2005/11/27 23:33:40 bernie
54 *#* Use appconfig.h instead of cfg/config.h.
56 *#* Revision 1.22 2005/11/04 16:20:02 bernie
57 *#* Fix reference to README.devlib in header.
59 *#* Revision 1.21 2005/04/11 19:10:27 bernie
60 *#* Include top-level headers from cfg/ subdir.
62 *#* Revision 1.20 2005/01/22 04:20:01 bernie
65 *#* Revision 1.19 2005/01/11 18:08:16 aleph
66 *#* Add missing include
68 *#* Revision 1.18 2004/12/08 08:57:17 bernie
69 *#* Rename time_t to mtime_t.
71 *#* Revision 1.17 2004/11/16 21:54:56 bernie
72 *#* Changes for SC Monoboard support.
74 *#* Revision 1.16 2004/10/19 11:48:05 bernie
77 *#* Revision 1.15 2004/10/19 08:11:53 bernie
78 *#* SERRF_TX, SERRF_RX: New macros; Enhance documentation.
80 *#* Revision 1.14 2004/10/03 18:43:18 bernie
81 *#* Fix a nasty bug caused by confusion between old-style and new-style configuration macros.
83 *#* Revision 1.13 2004/09/14 21:04:57 bernie
84 *#* Don't vanely call kdebug.h.
86 *#* Revision 1.12 2004/09/06 21:40:50 bernie
87 *#* Move buffer handling in chip-specific driver.
89 *#* Revision 1.11 2004/08/25 14:12:08 rasky
90 *#* Aggiornato il comment block dei log RCS
92 *#* Revision 1.10 2004/08/24 16:20:48 bernie
93 *#* ser_read(): Make buffer argument void *#* for consistency with ANSI C and ser_write()
95 *#* Revision 1.9 2004/08/15 05:32:22 bernie
96 *#* ser_resync(): New function.
98 *#* Revision 1.8 2004/08/02 20:20:29 aleph
99 *#* Merge from project_ks
101 *#* Revision 1.7 2004/07/30 14:15:53 rasky
102 *#* Nuovo supporto unificato per detect della CPU
104 *#* Revision 1.6 2004/07/29 22:57:09 bernie
105 *#* ser_drain(): New function; Make Serial::is_open a debug-only feature; Switch to new-style CONFIG_* macros.
107 *#* Revision 1.5 2004/07/18 21:54:23 bernie
108 *#* Add ATmega8 support.
110 *#* Revision 1.4 2004/06/03 11:27:09 bernie
111 *#* Add dual-license information.
113 *#* Revision 1.3 2004/06/02 21:35:24 aleph
114 *#* Serial enhancements: interruptible receive handler and 8 bit serial status for AVR; remove volatile attribute to FIFOBuffer, useless for new fifobuf routens
116 *#* Revision 1.2 2004/05/23 18:21:53 bernie
117 *#* Trim CVS logs and cleanup header info.
123 #include <mware/fifobuf.h>
124 #include <cfg/compiler.h>
125 #include <cfg/macros.h> /* BV() */
127 #include <appconfig.h>
129 /** \name Serial Error/status flags. */
132 typedef uint8_t serstatus_t;
134 /* Software errors */
135 #define SERRF_RXFIFOOVERRUN BV(0) /**< Rx FIFO buffer overrun */
136 #define SERRF_RXTIMEOUT BV(5) /**< Receive timeout */
137 #define SERRF_TXTIMEOUT BV(6) /**< Transmit timeout */
141 * These flags map directly to the AVR UART Status Register (USR).
143 #define SERRF_RXSROVERRUN BV(3) /**< Rx shift register overrun */
144 #define SERRF_FRAMEERROR BV(4) /**< Stop bit missing */
145 #define SERRF_PARITYERROR BV(7) /**< Parity error */
146 #define SERRF_NOISEERROR 0 /**< Unsupported */
148 typedef uint16_t serstatus_t;
150 /* Software errors */
151 #define SERRF_RXFIFOOVERRUN BV(0) /**< Rx FIFO buffer overrun */
152 #define SERRF_RXTIMEOUT BV(1) /**< Receive timeout */
153 #define SERRF_TXTIMEOUT BV(2) /**< Transmit timeout */
157 * These flags map directly to the SCI Control Register.
159 #define SERRF_PARITYERROR BV(8) /**< Parity error */
160 #define SERRF_FRAMEERROR BV(9) /**< Stop bit missing */
161 #define SERRF_NOISEERROR BV(10) /**< Noise error */
162 #define SERRF_RXSROVERRUN BV(11) /**< Rx shift register overrun */
164 typedef uint16_t serstatus_t;
166 /* Software errors */
167 #define SERRF_RXFIFOOVERRUN BV(0) /**< Rx FIFO buffer overrun */
168 #define SERRF_RXTIMEOUT BV(1) /**< Receive timeout */
169 #define SERRF_TXTIMEOUT BV(2) /**< Transmit timeout */
171 /* Hardware errors */
172 #define SERRF_RXSROVERRUN 0 /**< Unsupported in emulated serial port. */
173 #define SERRF_FRAMEERROR 0 /**< Unsupported in emulated serial port. */
174 #define SERRF_PARITYERROR 0 /**< Unsupported in emulated serial port. */
175 #define SERRF_NOISEERROR 0 /**< Unsupported in emulated serial port. */
178 #error unknown architecture
183 * \name Masks to group TX/RX errors.
187 ( SERRF_RXFIFOOVERRUN \
189 | SERRF_RXSROVERRUN \
190 | SERRF_PARITYERROR \
193 #define SERRF_TX (SERRF_TXTIMEOUT)
197 * \name LSB or MSB first data order, used with SPI AVR serial
200 #define SER_MSB_FIRST 0
201 #define SER_LSB_FIRST 1
205 * \name Parity settings for ser_setparity().
207 * \note Values are AVR-specific for performance reasons.
208 * Other processors should either decode them or
209 * redefine these macros.
212 #define SER_PARITY_NONE 0
213 #define SER_PARITY_EVEN 2
214 #define SER_PARITY_ODD 3
218 * \name Serial hw numbers
224 #if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128 || CPU_AVR_ATMEGA1281
228 #elif CPU_AVR_ATMEGA103 || CPU_AVR_ATMEGA8
232 // \todo since we now support "fake" multiplexed serials, this should be moved to hw.h
240 #error unknown architecture
242 SER_CNT /**< Number of serial ports */
247 struct SerialHardware;
249 /** Human-readable serial error descriptions */
250 extern const char * const serial_errors[8];
252 /** Serial handle structure */
253 typedef struct Serial
255 /** Physical port number */
263 * \name Transmit and receive FIFOs.
265 * Declared volatile because handled asinchronously by interrupts.
273 #if CONFIG_SER_RXTIMEOUT != -1
276 #if CONFIG_SER_TXTIMEOUT != -1
280 /** Holds the flags defined above. Will be 0 when no errors have occurred. */
281 volatile serstatus_t status;
283 /** Low-level interface to hardware. */
284 struct SerialHardware* hw;
288 /* Function prototypes */
289 extern int ser_putchar(int c, struct Serial *port);
290 extern int ser_getchar(struct Serial *port);
291 extern int ser_getchar_nowait(struct Serial *port);
293 extern int ser_write(struct Serial *port, const void *buf, size_t len);
294 extern int ser_read(struct Serial *port, void *buf, size_t size);
296 extern int ser_print(struct Serial *port, const char *s);
297 extern int ser_printf(struct Serial *port, const char *format, ...) FORMAT(__printf__, 2, 3);
299 extern int ser_gets(struct Serial *port, char *buf, int size);
300 extern int ser_gets_echo(struct Serial *port, char *buf, int size, bool echo);
302 extern void ser_setbaudrate(struct Serial *port, unsigned long rate);
303 extern void ser_setparity(struct Serial *port, int parity);
304 extern void ser_settimeouts(struct Serial *port, mtime_t rxtimeout, mtime_t txtimeout);
305 extern void ser_resync(struct Serial *port, mtime_t delay);
306 extern void ser_purge(struct Serial *port);
307 extern void ser_drain(struct Serial *port);
309 extern void ser_clearstatus(struct Serial *port);
311 extern struct Serial *ser_open(unsigned int unit);
312 extern void ser_close(struct Serial *port);
315 * \name Additional functions implemented as macros
319 #define ser_getstatus(h) ((h)->status)
320 #define ser_setstatus(h, x) ((h)->status = (x))
323 #endif /* DRV_SER_H */