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Completes coding of the PWM module

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git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4200 7fd9a85b-ad96-42d3-883c-3090e2eb8679
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patacongo
2011-12-19 19:24:09 +00:00
commit add995c32e
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apps/examples/pipe/transfer_test.c
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/****************************************************************************
* examples/pipe/transfer_test.c
*
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include "pipe.h"
/****************************************************************************
* Pre-proecessor Definitions
****************************************************************************/
#define MAX_BYTE 13
#define WRITE_SIZE MAX_BYTE
#define NWRITES 1400
#define NWRITE_BYTES (NWRITES * WRITE_SIZE)
#define READ_SIZE (2*MAX_BYTE)
#define NREADS (NWRITES / 2)
#define NREAD_BYTES NWRITE_BYTES
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: transfer_reader
****************************************************************************/
static void *transfer_reader(pthread_addr_t pvarg)
{
char buffer[READ_SIZE];
int fd = (int)pvarg;
int ret;
int nbytes;
int value;
int ndx;
printf("transfer_reader: started\n");
for (nbytes = 0, value = 0; nbytes < NREAD_BYTES;)
{
ret = read(fd, buffer, READ_SIZE);
if (ret < 0 )
{
fprintf(stderr, "transfer_reader: read failed, errno=%d\n", errno);
return (void*)1;
}
else if (ret == 0)
{
if (nbytes < NREAD_BYTES)
{
fprintf(stderr, "transfer_reader: Too few bytes read -- aborting: %d\n", nbytes);
return (void*)2;
}
break;
}
for (ndx = 0; ndx < ret; ndx++)
{
if (value >= WRITE_SIZE)
{
value = 0;
}
if (buffer[ndx] != value)
{
fprintf(stderr, "transfer_reader: Byte %d, expected %d, found %d\n",
nbytes + ndx, value, buffer[ndx]);
return (void*)3;
}
value++;
}
nbytes += ret;
if (nbytes > NREAD_BYTES)
{
fprintf(stderr, "transfer_reader: Too many bytes read -- aborting: %d\n", nbytes);
return (void*)4;
}
}
printf("transfer_reader: %d bytes read\n", nbytes);
return (void*)0;
}
/****************************************************************************
* Name: transfer_writer
****************************************************************************/
static void *transfer_writer(pthread_addr_t pvarg)
{
char buffer[WRITE_SIZE];
int fd = (int)pvarg;
int ret;
int i;
printf("transfer_writer: started\n");
for (i = 0; i < WRITE_SIZE; i++)
{
buffer[i] = i;
}
for (i = 0; i < NWRITES; i++)
{
ret = write(fd, buffer, WRITE_SIZE);
if (ret < 0 )
{
fprintf(stderr, "transfer_writer: write failed, errno=%d\n", errno);
return (void*)1;
}
else if (ret != WRITE_SIZE)
{
fprintf(stderr, "transfer_writer: Unexpected write size=%d\n", ret);
return (void*)2;
}
}
printf("transfer_writer: %d bytes written\n", NWRITE_BYTES);
return (void*)0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: transfer_test
****************************************************************************/
int transfer_test(int fdin, int fdout)
{
pthread_t readerid;
pthread_t writerid;
void *value;
int tmp;
int ret;
/* Start transfer_reader thread */
printf("transfer_test: Starting transfer_reader thread\n");
ret = pthread_create(&readerid, NULL, transfer_reader, (pthread_addr_t)fdin);
if (ret != 0)
{
fprintf(stderr, "transfer_test: Failed to create transfer_reader thread, error=%d\n", ret);
return 1;
}
/* Start transfer_writer thread */
printf("transfer_test: Starting transfer_writer thread\n");
ret = pthread_create(&writerid, NULL, transfer_writer, (pthread_addr_t)fdout);
if (ret != 0)
{
fprintf(stderr, "transfer_test: Failed to create transfer_writer thread, error=%d\n", ret);
pthread_detach(readerid);
ret = pthread_cancel(readerid);
if (ret != 0)
{
fprintf(stderr, "transfer_test: Failed to cancel transfer_reader thread, error=%d\n", ret);
}
return 2;
}
/* Wait for transfer_writer thread to complete */
printf("transfer_test: Waiting for transfer_writer thread\n");
ret = pthread_join(writerid, &value);
if (ret != 0)
{
fprintf(stderr, "transfer_test: pthread_join failed, error=%d\n", ret);
}
else
{
ret = (int)value;
printf("transfer_test: transfer_writer returned %d\n", ret);
}
/* Wait for transfer_reader thread to complete */
printf("transfer_test: Waiting for transfer_reader thread\n");
tmp = pthread_join(readerid, &value);
if (tmp != 0)
{
fprintf(stderr, "transfer_test: pthread_join failed, error=%d\n", ret);
}
else
{
tmp = (int)value;
printf("transfer_test: transfer_reader returned %d\n", tmp);
}
if (ret == 0)
{
ret = tmp;
}
printf("transfer_test: returning %d\n", ret);
return ret;
}