--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.3/spandsp-0.0.3/tests/async_tests.c	Fri Jun 25 16:00:21 2010 +0200
@@ -0,0 +1,255 @@
+/*
+ * 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 version 2, as
+ * published by the Free Software Foundation.
+ *
+ * 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 1.12 2006/11/19 14:07:26 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>
+#if defined(HAVE_TGMATH_H)
+#include <tgmath.h>
+#endif
+#if defined(HAVE_MATH_H)
+#include <math.h>
+#endif
+#include <assert.h>
+#include <audiofile.h>
+#include <tiffio.h>
+
+#include "spandsp.h"
+
+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];
+
+volatile int tx_async_chars;
+volatile int rx_async_chars;
+volatile int rx_async_char_mask;
+
+int v14_test_async_tx_get_bit(void *user_data);
+
+int v14_test_async_tx_get_bit(void *user_data)
+{
+    async_tx_state_t *s;
+    int bit;
+    static int destuff = 0;
+    
+    /* 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->byte_in_progress >>= 1;
+        s->parity_bit ^= bit;
+        s->bitpos++;
+        if (!s->parity  &&  s->bitpos == s->data_bits + 1)
+        {
+            /* Drop the stop bit on every fourth character for V.14 simulation*/
+            if ((++destuff & 3) == 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++;
+        /* Drop the stop bit on every fourth character for V.14 simulation */
+        if ((++destuff & 3) == 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++;
+    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;
+    while (rx_async_chars < 1000)
+    {
+        bit = async_tx_get_bit(&tx_async);
+        async_rx_put_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);
+    if (tx_async_chars != rx_async_chars
+        ||
+        rx_async.parity_errors
+        ||
+        rx_async.framing_errors)
+    {
+        printf("Test failed.\n");
+        exit(2);
+    }
+    
+    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;
+    while (rx_async_chars < 1000)
+    {
+        bit = async_tx_get_bit(&tx_async);
+        async_rx_put_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);
+    if (tx_async_chars != rx_async_chars
+        ||
+        rx_async.parity_errors
+        ||
+        rx_async.framing_errors)
+    {
+        printf("Test failed.\n");
+        exit(2);
+    }
+
+    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;
+    while (rx_async_chars < 1000)
+    {
+        bit = async_tx_get_bit(&tx_async);
+        async_rx_put_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);
+    if (tx_async_chars != rx_async_chars
+        ||
+        rx_async.parity_errors
+        ||
+        rx_async.framing_errors)
+    {
+        printf("Test failed.\n");
+        exit(2);
+    }
+
+    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;
+    while (rx_async_chars < 1000)
+    {
+        bit = v14_test_async_tx_get_bit(&tx_async);
+        async_rx_put_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);
+    if (tx_async_chars != rx_async_chars + 1
+        ||
+        rx_async.parity_errors
+        ||
+        rx_async.framing_errors)
+    {
+        printf("Test failed.\n");
+        exit(2);
+    }
+
+    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;
+    while (rx_async_chars < 1000)
+    {
+        bit = async_tx_get_bit(&tx_async);
+        async_rx_put_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);
+    if (tx_async_chars != rx_async_chars
+        ||
+        rx_async.parity_errors
+        ||
+        rx_async.framing_errors)
+    {
+        printf("Test failed.\n");
+        exit(2);
+    }
+
+    printf("Tests passed.\n");
+    return  0;
+}
+/*- End of function --------------------------------------------------------*/
+/*- End of file ------------------------------------------------------------*/