4 * Copyright 2003,2004 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 2000 Bernardo Innocenti <bernie@codewiz.org>
9 * \brief High level serial I/O API
12 * \author Bernardo Innocenti <bernie@develer.com>
17 * Revision 1.2 2004/05/23 18:21:53 bernie
18 * Trim CVS logs and cleanup header info.
25 #include <mware/fifobuf.h>
29 * \name Serial Error/status flags
31 * Some of these flags map directly to the flags
32 * in AVR UART Status Register(USR).
33 * \todo flags of DSP56k aren't mapped to these flags. Luckily
34 * these flags doesn't collide with the DSP56k ones,
35 * which are from 0x0100 to 0x8000
40 #define SERRF_RXFIFOOVERRUN BV(0) /*!< Rx FIFO buffer overrun */
41 #define SERRF_RXTIMEOUT BV(5) /*!< Receive timeout */
42 #define SERRF_TXTIMEOUT BV(6) /*!< Transmit timeout */
45 #define SERRF_RXSROVERRUN BV(3) /*!< Rx shift register overrun */
46 #define SERRF_FRAMEERROR BV(4) /*!< Stop bit missing */
47 #define SERRF_PARITYERROR BV(7) /*!< Parity error */
48 #elif defined(__m56800__)
50 #define SERRF_RXFIFOOVERRUN BV(0) /*!< Rx FIFO buffer overrun */
51 #define SERRF_RXTIMEOUT BV(1) /*!< Receive timeout */
52 #define SERRF_TXTIMEOUT BV(2) /*!< Transmit timeout */
55 #define SERRF_PARITYERROR BV(8) /*!< Parity error */
56 #define SERRF_FRAMEERROR BV(9) /*!< Stop bit missing */
57 #define SERRF_NOISEERROR BV(10) /*!< Noise error */
58 #define SERRF_RXSROVERRUN BV(11) /*!< Rx shift register overrun */
60 #error unknown architecture
64 /*! \name Parity settings for ser_setparity() */
66 #define SER_PARITY_NONE 0
67 #define SER_PARITY_EVEN 2
68 #define SER_PARITY_ODD 3
72 * \name Serial hw numbers
78 #if defined(__AVR_ATmega64__)
83 #elif defined(__AVR_ATmega103__)
87 #elif defined (__m56800__)
92 #error unknown architecture
95 SER_CNT /**< Number of serial ports */
100 struct SerialHardware;
102 /*! Human-readable serial error descriptions */
103 extern const char * const serial_errors[8];
105 /*! Serial handle structure */
108 /*! Physical port number */
114 * \name FIFO transmit and receive buffers.
116 * Declared volatile because handled asinchronously by interrupts.
120 volatile FIFOBuffer txfifo;
121 volatile FIFOBuffer rxfifo;
122 unsigned char txbuffer[CONFIG_SER_TXBUFSIZE];
123 unsigned char rxbuffer[CONFIG_SER_RXBUFSIZE];
126 #ifdef CONFIG_SER_RXTIMEOUT
129 #ifdef CONFIG_SER_TXTIMEOUT
133 /*! Holds the flags defined above. Will be 0 when no errors have occurred. */
134 REGISTER uint16_t status;
136 /*! Low-level interface to hardware. */
137 struct SerialHardware* hw;
141 /* Function prototypes */
142 extern int ser_putchar(int c, struct Serial *port);
143 extern int ser_getchar(struct Serial *port);
144 extern int ser_getchar_nowait(struct Serial *port);
145 extern int ser_write(struct Serial *port, const void *buf, size_t len);
146 extern int ser_read(struct Serial *port, char *buf, size_t size);
147 extern int ser_print(struct Serial *port, const char *s);
148 extern int ser_gets(struct Serial *port, char *buf, int size);
149 extern int ser_gets_echo(struct Serial *port, char *buf, int size, bool echo);
150 extern int ser_printf(struct Serial *port, const char *format, ...) FORMAT(__printf__, 2, 3);
151 extern void ser_setbaudrate(struct Serial *port, unsigned long rate);
152 extern void ser_setparity(struct Serial *port, int parity);
153 extern void ser_purge(struct Serial *port);
154 extern struct Serial *ser_open(unsigned int unit);
155 extern void ser_close(struct Serial *port);
156 #if defined(CONFIG_SER_RXTIMEOUT) || defined(CONFIG_SER_TXTIMEOUT)
157 extern void ser_settimeouts(struct Serial *port, time_t rxtimeout, time_t txtimeout);
161 * \name Additional functions implemented as macros
165 #define ser_getstatus(h) ((h)->status)
166 #define ser_setstatus(h, x) ((h)->status = (x))
169 #endif /* DRV_SER_H */