//==========================================================================
//
//        can_rx_tx.c
//
//        CAN RX / TX test
//
//==========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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// the terms of the GNU General Public License as published by the Free
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// 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
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
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// 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
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// this file might be covered by the GNU General Public License.
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// at http://sources.redhat.com/ecos/ecos-license/
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//####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     Uwe Kindler
// Contributors:  Uwe Kindler
// Date:          2007-06-26
// Description:   CAN RX/TX test for 2 CAN channels
//####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 the loop can driver
#if defined(CYGPKG_DEVS_CAN_LOOP)
#include <pkgconf/devs_can_loop.h>

#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 can_tx_thread;
thread_data_t      can0_thread_data;
cyg_thread_entry_t can_rx_thread;
thread_data_t      can1_thread_data;
cyg_io_handle_t    hCAN_Tbl[2];
cyg_io_handle_t    hLoopCAN_Tbl[2];


//===========================================================================
// Thread 0
//===========================================================================
void can_rx_thread(cyg_addrword_t data)
{
    cyg_uint32    len;
    cyg_can_event rx_event;
    cyg_can_event loop_rx_event;
    cyg_uint32    msg_cnt = 0;
    cyg_uint8     i;

    while (msg_cnt < 0xF0)
    {
        
        //
        // First receive CAN event from real CAN hardware
        //
        len = sizeof(rx_event);
        if (ENOERR != cyg_io_read(hCAN_Tbl[1], &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:");
        } // if (rx_event.flags & CYGNUM_CAN_EVENT_RX)
        else
        {
            print_can_flags(rx_event.flags, "");    
        }
        
        //
        // Now receive CAN event from loop CAN driver
        //
        len = sizeof(loop_rx_event);
        if (ENOERR != cyg_io_read(hLoopCAN_Tbl[1], &loop_rx_event, &len))
        {
            CYG_TEST_FAIL_FINISH("Error reading from loop channel 1");   
        }
        
        if (rx_event.flags & CYGNUM_CAN_EVENT_RX)
        {
            print_can_msg(&rx_event.msg, "RX loop 1:");
        } // if (rx_event.flags & CYGNUM_CAN_EVENT_RX)
        else
        {
            print_can_flags(rx_event.flags, "");    
        }   
        
        //
        // Chaeck message ID and DLC of HW CAN message and CAN message from loop driver
        // booth should be the same
        //
        if (rx_event.msg.id != loop_rx_event.msg.id)
        {
            CYG_TEST_FAIL_FINISH("Received message IDs of hw CAN channel and loop CAN channel are not equal");      
        }
        
        if (rx_event.msg.dlc != loop_rx_event.msg.dlc)
        {
            CYG_TEST_FAIL_FINISH("Received DLCs of hw CAN msg and loop CAN msg are not equal");      
        }
        
        //
        // Now check each data byte of the receive message
        //
        for (i = 0; i < rx_event.msg.dlc; ++i)
        {
            if (rx_event.msg.data.bytes[i] != loop_rx_event.msg.data.bytes[i])
            {
                CYG_TEST_FAIL_FINISH("Data of hw CAN msg and loop CAN  msg are not equal");          
            }
            
            if (rx_event.msg.data.bytes[i] != (i + msg_cnt))
            {
                CYG_TEST_FAIL_FINISH("CAN message contains unexpected data");         
            }
        }
        
        msg_cnt++;
    } // while (1)
    
    CYG_TEST_PASS_FINISH("CAN rx/tx test OK");         
}


//===========================================================================
// Thread 1
//===========================================================================
void can_tx_thread(cyg_addrword_t data)
{
    cyg_uint32      len;
    cyg_can_message tx_msg;
    cyg_uint32      msg_cnt = 0;
    cyg_uint8       i;

    
    CYG_CAN_MSG_SET_PARAM(tx_msg, 0, CYGNUM_CAN_ID_STD, 0, CYGNUM_CAN_FRAME_DATA);
    
    //
    // Prepare CAN message with a known CAN state
    //
    for (i = 0; i < 8; ++i)
    {
        tx_msg.data.bytes[i] = i; 
    }
    
    while (msg_cnt < 0xF0)
    {
        tx_msg.id = msg_cnt;
        len = sizeof(tx_msg);
        if (ENOERR != cyg_io_write(hCAN_Tbl[0], &tx_msg, &len))
        {
            CYG_TEST_FAIL_FINISH("Error writing to channel 0");    
        }
        
        
        tx_msg.id = msg_cnt;
        len = sizeof(tx_msg);
        if (ENOERR != cyg_io_write(hLoopCAN_Tbl[0], &tx_msg, &len))
        {
            CYG_TEST_FAIL_FINISH("Error writing to channel 1");    
        }
        
        //
        // Increment data in each single data byte
        //
        for (i = 0; i < 8; ++i)
        {
            tx_msg.data.bytes[i] += 1;    
        }
        
        msg_cnt++;
        tx_msg.dlc = (tx_msg.dlc + 1) % 9;
    } // while (msg_cnt < 0x100)
}


//===========================================================================
// 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");
    }
    
    //
    // open Loop CAN device driver channel 1
    //
    if (ENOERR != cyg_io_lookup(CYGDAT_DEVS_CAN_LOOP_CAN0_NAME, &hLoopCAN_Tbl[0])) 
    {
        CYG_TEST_FAIL_FINISH("Error opening loop CAN channel 0");
    }
    

    //
    // open Loop CAN device driver channel 2
    //
    if (ENOERR != cyg_io_lookup(CYGDAT_DEVS_CAN_LOOP_CAN1_NAME, &hLoopCAN_Tbl[1])) 
    {
        CYG_TEST_FAIL_FINISH("Error opening loop CAN channel 1");
    }
    
    

    
   
    //
    // create the first thread that access the CAN device driver
    //
    cyg_thread_create(5, can_tx_thread, 
                        (cyg_addrword_t) 0,
                        "can_tx_thread", 
                        (void *) can0_thread_data.stack, 
                        1024 * sizeof(long),
                        &can0_thread_data.hdl, 
                        &can0_thread_data.obj);
    
    //
    // create the second thread that access the CAN device driver
    //
    cyg_thread_create(4, can_rx_thread, 
                         (cyg_addrword_t) 0,
                         "can_rx_thread", 
                         (void *) can1_thread_data.stack, 
                         1024 * sizeof(long),
                         &can1_thread_data.hdl, 
                         &can1_thread_data.obj);
                        
    cyg_thread_resume(can0_thread_data.hdl);
    cyg_thread_resume(can1_thread_data.hdl);
    
    cyg_scheduler_start();
}
#else // defined(CYGPKG_DEVS_CAN_LOOP)
#define N_A_MSG "Needs support for loop CAN device driver"
#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_rx_tx.c