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 1.9 2004/08/15 05:32:22 bernie
18 * ser_resync(): New function.
20 * Revision 1.8 2004/08/02 20:20:29 aleph
21 * Merge from project_ks
23 * Revision 1.7 2004/07/30 14:15:53 rasky
24 * Nuovo supporto unificato per detect della CPU
26 * Revision 1.6 2004/07/29 22:57:09 bernie
27 * ser_drain(): New function; Make Serial::is_open a debug-only feature; Switch to new-style CONFIG_* macros.
29 * Revision 1.5 2004/07/18 21:54:23 bernie
30 * Add ATmega8 support.
32 * Revision 1.4 2004/06/03 11:27:09 bernie
33 * Add dual-license information.
35 * Revision 1.3 2004/06/02 21:35:24 aleph
36 * Serial enhancements: interruptible receive handler and 8 bit serial status for AVR; remove volatile attribute to FIFOBuffer, useless for new fifobuf routens
38 * Revision 1.2 2004/05/23 18:21:53 bernie
39 * Trim CVS logs and cleanup header info.
45 #include <mware/fifobuf.h>
46 #include <drv/kdebug.h>
51 * \name Serial Error/status flags
53 * Some of these flags map directly to the flags
54 * in AVR UART Status Register(USR).
55 * \todo flags of DSP56k aren't mapped to these flags. Luckily
56 * these flags doesn't collide with the DSP56k ones,
57 * which are from 0x0100 to 0x8000
61 typedef uint8_t serstatus_t;
64 #define SERRF_RXFIFOOVERRUN BV(0) /*!< Rx FIFO buffer overrun */
65 #define SERRF_RXTIMEOUT BV(5) /*!< Receive timeout */
66 #define SERRF_TXTIMEOUT BV(6) /*!< Transmit timeout */
69 #define SERRF_RXSROVERRUN BV(3) /*!< Rx shift register overrun */
70 #define SERRF_FRAMEERROR BV(4) /*!< Stop bit missing */
71 #define SERRF_PARITYERROR BV(7) /*!< Parity error */
73 typedef uint16_t serstatus_t;
76 #define SERRF_RXFIFOOVERRUN BV(0) /*!< Rx FIFO buffer overrun */
77 #define SERRF_RXTIMEOUT BV(1) /*!< Receive timeout */
78 #define SERRF_TXTIMEOUT BV(2) /*!< Transmit timeout */
81 #define SERRF_PARITYERROR BV(8) /*!< Parity error */
82 #define SERRF_FRAMEERROR BV(9) /*!< Stop bit missing */
83 #define SERRF_NOISEERROR BV(10) /*!< Noise error */
84 #define SERRF_RXSROVERRUN BV(11) /*!< Rx shift register overrun */
86 #error unknown architecture
90 /*! \name Parity settings for ser_setparity() */
92 #define SER_PARITY_NONE 0
93 #define SER_PARITY_EVEN 2
94 #define SER_PARITY_ODD 3
98 * \name Serial hw numbers
104 #if defined(CPU_AVR_ATMEGA64) || defined(CPU_AVR_ATMEGA128)
108 #elif defined(CPU_AVR_ATMEGA103) || defined(CPU_AVR_ATMEGA8)
115 #error unknown architecture
117 SER_CNT /*!< Number of serial ports */
122 struct SerialHardware;
124 /*! Human-readable serial error descriptions */
125 extern const char * const serial_errors[8];
127 /*! Serial handle structure */
130 /*! Physical port number */
136 * \name FIFO transmit and receive buffers.
138 * Declared volatile because handled asinchronously by interrupts.
144 unsigned char txbuffer[CONFIG_SER_TXBUFSIZE];
145 unsigned char rxbuffer[CONFIG_SER_RXBUFSIZE];
148 #if CONFIG_SER_RXTIMEOUT != -1
151 #if CONFIG_SER_TXTIMEOUT != -1
155 /*! Holds the flags defined above. Will be 0 when no errors have occurred. */
158 /*! Low-level interface to hardware. */
159 struct SerialHardware* hw;
163 /* Function prototypes */
164 extern int ser_putchar(int c, struct Serial *port);
165 extern int ser_getchar(struct Serial *port);
166 extern int ser_getchar_nowait(struct Serial *port);
168 extern int ser_write(struct Serial *port, const void *buf, size_t len);
169 extern int ser_read(struct Serial *port, char *buf, size_t size);
171 extern int ser_print(struct Serial *port, const char *s);
172 extern int ser_printf(struct Serial *port, const char *format, ...) FORMAT(__printf__, 2, 3);
174 extern int ser_gets(struct Serial *port, char *buf, int size);
175 extern int ser_gets_echo(struct Serial *port, char *buf, int size, bool echo);
177 extern void ser_setbaudrate(struct Serial *port, unsigned long rate);
178 extern void ser_setparity(struct Serial *port, int parity);
179 extern void ser_settimeouts(struct Serial *port, time_t rxtimeout, time_t txtimeout);
180 extern void ser_resync(struct Serial *port, time_t delay);
181 extern void ser_purge(struct Serial *port);
182 extern void ser_drain(struct Serial *port);
184 extern struct Serial *ser_open(unsigned int unit);
185 extern void ser_close(struct Serial *port);
188 * \name Additional functions implemented as macros
192 #define ser_getstatus(h) ((h)->status)
193 #define ser_setstatus(h, x) ((h)->status = (x))
196 #endif /* DRV_SER_H */