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 devlib/README for information.
9 * \brief High level serial I/O API
12 * \author Bernardo Innocenti <bernie@develer.com>
17 *#* Revision 1.14 2004/10/03 18:43:18 bernie
18 *#* Fix a nasty bug caused by confusion between old-style and new-style configuration macros.
20 *#* Revision 1.13 2004/09/14 21:04:57 bernie
21 *#* Don't vanely call kdebug.h.
23 *#* Revision 1.12 2004/09/06 21:40:50 bernie
24 *#* Move buffer handling in chip-specific driver.
26 *#* Revision 1.11 2004/08/25 14:12:08 rasky
27 *#* Aggiornato il comment block dei log RCS
29 *#* Revision 1.10 2004/08/24 16:20:48 bernie
30 *#* ser_read(): Make buffer argument void *#* for consistency with ANSI C and ser_write()
32 *#* Revision 1.9 2004/08/15 05:32:22 bernie
33 *#* ser_resync(): New function.
35 *#* Revision 1.8 2004/08/02 20:20:29 aleph
36 *#* Merge from project_ks
38 *#* Revision 1.7 2004/07/30 14:15:53 rasky
39 *#* Nuovo supporto unificato per detect della CPU
41 *#* Revision 1.6 2004/07/29 22:57:09 bernie
42 *#* ser_drain(): New function; Make Serial::is_open a debug-only feature; Switch to new-style CONFIG_* macros.
44 *#* Revision 1.5 2004/07/18 21:54:23 bernie
45 *#* Add ATmega8 support.
47 *#* Revision 1.4 2004/06/03 11:27:09 bernie
48 *#* Add dual-license information.
50 *#* Revision 1.3 2004/06/02 21:35:24 aleph
51 *#* Serial enhancements: interruptible receive handler and 8 bit serial status for AVR; remove volatile attribute to FIFOBuffer, useless for new fifobuf routens
53 *#* Revision 1.2 2004/05/23 18:21:53 bernie
54 *#* Trim CVS logs and cleanup header info.
60 #include <mware/fifobuf.h>
65 * \name Serial Error/status flags
67 * Some of these flags map directly to the flags
68 * in AVR UART Status Register(USR).
69 * \todo flags of DSP56k aren't mapped to these flags. Luckily
70 * these flags doesn't collide with the DSP56k ones,
71 * which are from 0x0100 to 0x8000
75 typedef uint8_t serstatus_t;
78 #define SERRF_RXFIFOOVERRUN BV(0) /*!< Rx FIFO buffer overrun */
79 #define SERRF_RXTIMEOUT BV(5) /*!< Receive timeout */
80 #define SERRF_TXTIMEOUT BV(6) /*!< Transmit timeout */
83 #define SERRF_RXSROVERRUN BV(3) /*!< Rx shift register overrun */
84 #define SERRF_FRAMEERROR BV(4) /*!< Stop bit missing */
85 #define SERRF_PARITYERROR BV(7) /*!< Parity error */
87 typedef uint16_t serstatus_t;
90 #define SERRF_RXFIFOOVERRUN BV(0) /*!< Rx FIFO buffer overrun */
91 #define SERRF_RXTIMEOUT BV(1) /*!< Receive timeout */
92 #define SERRF_TXTIMEOUT BV(2) /*!< Transmit timeout */
95 #define SERRF_PARITYERROR BV(8) /*!< Parity error */
96 #define SERRF_FRAMEERROR BV(9) /*!< Stop bit missing */
97 #define SERRF_NOISEERROR BV(10) /*!< Noise error */
98 #define SERRF_RXSROVERRUN BV(11) /*!< Rx shift register overrun */
100 #error unknown architecture
104 /*! \name Parity settings for ser_setparity() */
106 #define SER_PARITY_NONE 0
107 #define SER_PARITY_EVEN 2
108 #define SER_PARITY_ODD 3
112 * \name Serial hw numbers
118 #if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128
122 #elif CPU_AVR_ATMEGA103 || CPU_AVR_ATMEGA8
129 #error unknown architecture
131 SER_CNT /*!< Number of serial ports */
136 struct SerialHardware;
138 /*! Human-readable serial error descriptions */
139 extern const char * const serial_errors[8];
141 /*! Serial handle structure */
144 /*! Physical port number */
152 * \name Transmit and receive FIFOs.
154 * Declared volatile because handled asinchronously by interrupts.
162 #if CONFIG_SER_RXTIMEOUT != -1
165 #if CONFIG_SER_TXTIMEOUT != -1
169 /*! Holds the flags defined above. Will be 0 when no errors have occurred. */
172 /*! Low-level interface to hardware. */
173 struct SerialHardware* hw;
177 /* Function prototypes */
178 extern int ser_putchar(int c, struct Serial *port);
179 extern int ser_getchar(struct Serial *port);
180 extern int ser_getchar_nowait(struct Serial *port);
182 extern int ser_write(struct Serial *port, const void *buf, size_t len);
183 extern int ser_read(struct Serial *port, void *buf, size_t size);
185 extern int ser_print(struct Serial *port, const char *s);
186 extern int ser_printf(struct Serial *port, const char *format, ...) FORMAT(__printf__, 2, 3);
188 extern int ser_gets(struct Serial *port, char *buf, int size);
189 extern int ser_gets_echo(struct Serial *port, char *buf, int size, bool echo);
191 extern void ser_setbaudrate(struct Serial *port, unsigned long rate);
192 extern void ser_setparity(struct Serial *port, int parity);
193 extern void ser_settimeouts(struct Serial *port, time_t rxtimeout, time_t txtimeout);
194 extern void ser_resync(struct Serial *port, time_t delay);
195 extern void ser_purge(struct Serial *port);
196 extern void ser_drain(struct Serial *port);
198 extern struct Serial *ser_open(unsigned int unit);
199 extern void ser_close(struct Serial *port);
202 * \name Additional functions implemented as macros
206 #define ser_getstatus(h) ((h)->status)
207 #define ser_setstatus(h, x) ((h)->status = (x))
210 #endif /* DRV_SER_H */