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/*
* SpanDSP - a series of DSP components for telephony
*
* async_tests.c - Tests for asynchronous serial processing.
*
* Written by Steve Underwood <steveu@coppice.org>
*
* Copyright (C) 2004 Steve Underwood
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: async_tests.c,v 1.5 2005/11/27 12:36:22 steveu Exp $
*/
/*! \file */
/*! \page async_tests_page Asynchronous bit stream tests
\section async_tests_page_sec_1 What does it do?
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <inttypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <assert.h>
#include <audiofile.h>
#include <tiffio.h>
#include "spandsp.h"
#define NB_SAMPLES 160
async_rx_state_t rx_async;
async_tx_state_t tx_async;
int full_len;
uint8_t old_buf[1000];
uint8_t new_buf[1000];
int tx_async_chars;
int rx_async_chars;
int rx_async_char_mask;
int v14_test_async_tx_bit(void *user_data)
{
async_tx_state_t *s;
int bit;
/* Special routine to test V.14 rate adaption, by randomly skipping
stop bits. */
s = (async_tx_state_t *) user_data;
if (s->bitpos == 0)
{
/* Start bit */
bit = 0;
s->byte_in_progress = s->get_byte(s->user_data);
s->parity_bit = 0;
s->bitpos++;
}
else if (s->bitpos <= s->data_bits)
{
bit = s->byte_in_progress & 1;
s->parity_bit ^= bit;
s->byte_in_progress >>= 1;
s->bitpos++;
if (!s->parity && s->bitpos == s->data_bits + 1)
{
if ((rand() & 1))
{
s->parity_bit = 0;
s->bitpos = 0;
}
}
}
else if (s->parity && s->bitpos == s->data_bits + 1)
{
if (s->parity == ASYNC_PARITY_ODD)
s->parity_bit ^= 1;
bit = s->parity_bit;
s->bitpos++;
if ((rand() & 1))
{
s->parity_bit = 0;
s->bitpos = 0;
}
}
else
{
/* Stop bit(s) */
bit = 1;
s->bitpos++;
if (s->bitpos > s->data_bits + s->stop_bits)
s->bitpos = 0;
}
return bit;
}
/*- End of function --------------------------------------------------------*/
static int test_get_async_byte(void *user_data)
{
int byte;
byte = tx_async_chars & 0xFF;
tx_async_chars++;
//printf("Send %x\n", byte);
return byte;
}
/*- End of function --------------------------------------------------------*/
static void test_put_async_byte(void *user_data, int byte)
{
if ((rx_async_chars & rx_async_char_mask) != byte)
printf("Received byte is 0x%X (expected 0x%X)\n", byte, rx_async_chars);
rx_async_chars++;
}
/*- End of function --------------------------------------------------------*/
int main(int argc, char *argv[])
{
int bit;
printf("Test with async 8N1\n");
async_tx_init(&tx_async, 8, ASYNC_PARITY_NONE, 1, FALSE, test_get_async_byte, NULL);
async_rx_init(&rx_async, 8, ASYNC_PARITY_NONE, 1, FALSE, test_put_async_byte, NULL);
tx_async_chars = 0;
rx_async_chars = 0;
rx_async_char_mask = 0xFF;
for ( ; rx_async_chars < 1000; )
{
bit = async_tx_bit(&tx_async);
async_rx_bit(&rx_async, bit);
}
printf("Chars=%d/%d, PE=%d, FE=%d\n", tx_async_chars, rx_async_chars, rx_async.parity_errors, rx_async.framing_errors);
printf("Test with async 7E1\n");
async_tx_init(&tx_async, 7, ASYNC_PARITY_EVEN, 1, FALSE, test_get_async_byte, NULL);
async_rx_init(&rx_async, 7, ASYNC_PARITY_EVEN, 1, FALSE, test_put_async_byte, NULL);
tx_async_chars = 0;
rx_async_chars = 0;
rx_async_char_mask = 0x7F;
for ( ; rx_async_chars < 1000; )
{
bit = async_tx_bit(&tx_async);
async_rx_bit(&rx_async, bit);
}
printf("Chars=%d/%d, PE=%d, FE=%d\n", tx_async_chars, rx_async_chars, rx_async.parity_errors, rx_async.framing_errors);
printf("Test with async 8O1\n");
async_tx_init(&tx_async, 8, ASYNC_PARITY_ODD, 1, FALSE, test_get_async_byte, NULL);
async_rx_init(&rx_async, 8, ASYNC_PARITY_ODD, 1, FALSE, test_put_async_byte, NULL);
tx_async_chars = 0;
rx_async_chars = 0;
rx_async_char_mask = 0xFF;
for ( ; rx_async_chars < 1000; )
{
bit = async_tx_bit(&tx_async);
async_rx_bit(&rx_async, bit);
}
printf("Chars=%d/%d, PE=%d, FE=%d\n", tx_async_chars, rx_async_chars, rx_async.parity_errors, rx_async.framing_errors);
printf("Test with async 8O1 and V.14\n");
async_tx_init(&tx_async, 8, ASYNC_PARITY_ODD, 1, TRUE, test_get_async_byte, NULL);
async_rx_init(&rx_async, 8, ASYNC_PARITY_ODD, 1, TRUE, test_put_async_byte, NULL);
tx_async_chars = 0;
rx_async_chars = 0;
rx_async_char_mask = 0xFF;
for ( ; rx_async_chars < 1000; )
{
bit = v14_test_async_tx_bit(&tx_async);
async_rx_bit(&rx_async, bit);
}
printf("Chars=%d/%d, PE=%d, FE=%d\n", tx_async_chars, rx_async_chars, rx_async.parity_errors, rx_async.framing_errors);
printf("Test with async 5N2\n");
async_tx_init(&tx_async, 5, ASYNC_PARITY_NONE, 2, FALSE, test_get_async_byte, NULL);
async_rx_init(&rx_async, 5, ASYNC_PARITY_NONE, 2, FALSE, test_put_async_byte, NULL);
tx_async_chars = 0;
rx_async_chars = 0;
rx_async_char_mask = 0x1F;
for ( ; rx_async_chars < 1000; )
{
bit = async_tx_bit(&tx_async);
async_rx_bit(&rx_async, bit);
}
printf("Chars=%d/%d, PE=%d, FE=%d\n", tx_async_chars, rx_async_chars, rx_async.parity_errors, rx_async.framing_errors);
return 0;
}
/*- End of function --------------------------------------------------------*/
/*- End of file ------------------------------------------------------------*/
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