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git-svn-id: http://svn.openzap.org/svn/openzap/trunk@217 a93c3328-9c30-0410-af19-c9cd2b2d52af
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Anthony Minessale
2007-06-05 04:38:05 +00:00
parent 82c58d1030
commit 0b973f0309
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libs/freetdm/src/include/uart.h Normal file
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/*
* uart.h
*
* Copyright (c) 2005 Robert Krten. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This module contains the manifest constants and declarations for
* the UART module.
*
* 2005 06 19 R. Krten created
*/
#ifndef __UART_H__
#define __UART_H__
typedef void (*bytehandler_func_t) (void *, int);
typedef void (*bithandler_func_t) (void *, int);
typedef struct dsp_uart_attr_s
{
bytehandler_func_t bytehandler; /* byte handler */
void *bytehandler_arg; /* arbitrary ID passed to bytehandler as first argument */
} dsp_uart_attr_t;
typedef struct
{
dsp_uart_attr_t attr;
int have_start; /* wait for start bit to show up */
int data; /* data buffer */
int nbits; /* number of bits accumulated so far */
} dsp_uart_handle_t;
/*
* Function prototypes
*
* General calling order is:
* a) create the attributes structure (dsp_uart_attr_init)
* b) initialize fields in the attributes structure (dsp_uart_attr_set_*)
* c) create a Bell-202 handle (dsp_uart_create)
* d) feed bits through dsp_uart_bit_handler
*/
void dsp_uart_attr_init(dsp_uart_attr_t *attributes);
bytehandler_func_t dsp_uart_attr_get_bytehandler(dsp_uart_attr_t *attributes, void **bytehandler_arg);
void dsp_uart_attr_set_bytehandler(dsp_uart_attr_t *attributes, bytehandler_func_t bytehandler, void *bytehandler_arg);
dsp_uart_handle_t * dsp_uart_create(dsp_uart_attr_t *attributes);
void dsp_uart_destroy(dsp_uart_handle_t **handle);
void dsp_uart_bit_handler(void *handle, int bit);
#endif