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//==========================================================================
//
// can_busload.c
//
// CAN bus load test
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos 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 or (at your option) any later
// version.
//
// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): Uwe Kindler
// Contributors: Uwe Kindler
// Date: 2007-06-26
// Description: CAN bus load test
//####DESCRIPTIONEND####
//===========================================================================
// INCLUDES
//===========================================================================
#include <pkgconf/system.h>
#include <cyg/infra/testcase.h> // test macros
#include <cyg/infra/cyg_ass.h> // assertion macros
#include <cyg/infra/diag.h>
// Package requirements
#if defined(CYGPKG_IO_CAN) && defined(CYGPKG_KERNEL)
#include <pkgconf/kernel.h>
#include <cyg/io/io.h>
#include <cyg/io/canio.h>
// Package option requirements
#if defined(CYGFUN_KERNEL_API_C)
#include <cyg/hal/hal_arch.h> // CYGNUM_HAL_STACK_SIZE_TYPICAL
#include <cyg/kernel/kapi.h>
// We need two CAN channels
#if defined(CYGPKG_DEVS_CAN_LPC2XXX_CAN0) && defined(CYGPKG_DEVS_CAN_LPC2XXX_CAN1)
// The same baud rates are required because we send from one channel to the other one
#if CYGNUM_DEVS_CAN_LPC2XXX_CAN0_KBAUD == CYGNUM_DEVS_CAN_LPC2XXX_CAN1_KBAUD
// We need a large RX buffer
#ifdef CYGNUM_DEVS_CAN_LPC2XXX_CAN0_QUEUESIZE_RX_1024
#include "can_test_aux.inl" // include CAN test auxiliary functions
//===========================================================================
// DATA TYPES
//===========================================================================
typedef struct st_thread_data
{
cyg_thread obj;
long stack[CYGNUM_HAL_STACK_SIZE_TYPICAL];
cyg_handle_t hdl;
} thread_data_t;
//===========================================================================
// LOCAL DATA
//===========================================================================
cyg_thread_entry_t can0_thread;
thread_data_t can0_thread_data;
cyg_io_handle_t hCAN_Tbl[2];
//===========================================================================
// Thread 0
//===========================================================================
void can0_thread(cyg_addrword_t data)
{
cyg_uint32 len;
cyg_can_message tx_msg;
cyg_can_event rx_event;
cyg_uint32 i;
cyg_uint32 rx_msg_cnt = 0;
//
// Prepeare message - we use a data length of 0 bytes here. Each received message
// causes an iterrupt. The shortest message is a 0 data byte message. This will generate
// the highest interrupt rate
//
CYG_CAN_MSG_SET_PARAM(tx_msg, 0, CYGNUM_CAN_ID_STD, 0, CYGNUM_CAN_FRAME_DATA);
//
// Now send 1024 CAN messages as fast as possible to stress the receiver of CAN
// channel 1
//
for (i = 0; i< 1024; ++i)
{
tx_msg.id = i;
len = sizeof(tx_msg);
if (ENOERR != cyg_io_write(hCAN_Tbl[1], &tx_msg, &len))
{
CYG_TEST_FAIL_FINISH("Error writing to channel 0");
}
}
//
// Now try to receive all 1024 CAN messages. If all messages are received
// and no overrun occured then the message processing is fast enought
//
while (1)
{
len = sizeof(rx_event);
//
// First receive CAN event from real CAN hardware
//
len = sizeof(rx_event);
if (ENOERR != cyg_io_read(hCAN_Tbl[0], &rx_event, &len))
{
CYG_TEST_FAIL_FINISH("Error reading from channel 1");
}
if (rx_event.flags & CYGNUM_CAN_EVENT_RX)
{
print_can_msg(&rx_event.msg, "RX chan 1:");
rx_msg_cnt++;
if (rx_msg_cnt == 1024)
{
CYG_TEST_PASS_FINISH("CAN load test OK");
}
} // if (rx_event.flags & CYGNUM_CAN_EVENT_RX)
else
{
print_can_flags(rx_event.flags, "");
if (rx_event.flags & CYGNUM_CAN_EVENT_OVERRUN_RX)
{
CYG_TEST_FAIL_FINISH("RX overrun for channel 1");
}
if (rx_event.flags & CYGNUM_CAN_EVENT_ERR_PASSIVE)
{
CYG_TEST_FAIL_FINISH("Channel 1 error passive event");
}
if (rx_event.flags & CYGNUM_CAN_EVENT_BUS_OFF)
{
CYG_TEST_FAIL_FINISH("Channel 1 bus off event");
}
}
} // while (1)
}
//===========================================================================
// Entry point
//===========================================================================
void cyg_start(void)
{
CYG_TEST_INIT();
//
// open CAN device driver channel 1
//
if (ENOERR != cyg_io_lookup(CYGPKG_DEVS_CAN_LPC2XXX_CAN0_NAME, &hCAN_Tbl[0]))
{
CYG_TEST_FAIL_FINISH("Error opening CAN channel 0");
}
//
// open CAN device driver channel 2
//
if (ENOERR != cyg_io_lookup(CYGPKG_DEVS_CAN_LPC2XXX_CAN1_NAME, &hCAN_Tbl[1]))
{
CYG_TEST_FAIL_FINISH("Error opening CAN channel 1");
}
//
// create the main thread
//
cyg_thread_create(5, can0_thread,
(cyg_addrword_t) 0,
"can_tx_thread",
(void *) can0_thread_data.stack,
1024 * sizeof(long),
&can0_thread_data.hdl,
&can0_thread_data.obj);
cyg_thread_resume(can0_thread_data.hdl);
cyg_scheduler_start();
}
#else // CYGNUM_DEVS_CAN_LPC2XXX_CAN0_QUEUESIZE_RX_1024
#define N_A_MSG "Channel 0 needs RX buffer size for 1024 events"
#endif
#else // CYGNUM_DEVS_CAN_LPC2XXX_CAN0_KBAUD == CYGNUM_DEVS_CAN_LPC2XXX_CAN1_KBAUD
#define N_A_MSG "Baudrate of channel 0 and 1 need to be equal"
#endif
#else // defined(CYGPKG_DEVS_CAN_LPC2XXX_CAN0) && defined(CYGPKG_DEVS_CAN_LPC2XXX_CAN1)
#define N_A_MSG "Needs support for CAN channel 1 and 2"
#endif
#else // CYGFUN_KERNEL_API_C
#define N_A_MSG "Needs kernel C API"
#endif
#else // CYGPKG_IO_CAN && CYGPKG_KERNEL
#define N_A_MSG "Needs Kernel"
#endif
#ifdef N_A_MSG
void
cyg_start( void )
{
CYG_TEST_INIT();
CYG_TEST_NA(N_A_MSG);
}
#endif // N_A_MSG
//---------------------------------------------------------------------------
// EOF can_busload.c
|
