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//=============================================================================
//
//      hal_diag.c
//
//      HAL diagnostic output code
//
//=============================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####                                            
// -------------------------------------------                              
// This file is part of eCos, the Embedded Configurable Operating System.   
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, 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.                                                        
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//
// 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,       
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// General Public License v2.                                               
//
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// on this file might be covered by the GNU General Public License.         
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// ####ECOSGPLCOPYRIGHTEND####                                              
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    nickg, jskov
// Contributors: nickg, jskov
// Date:         1999-03-23
// Purpose:      HAL diagnostic output
// Description:  Implementations of HAL diagnostic output support.
//
//####DESCRIPTIONEND####
//
//=============================================================================
 
#include <pkgconf/hal.h>
 
#include <cyg/hal/hal_diag.h>           // our header.
 
#include <cyg/infra/cyg_type.h>         // base types, externC
#include <cyg/hal/hal_io.h>             // IO macros
#include <cyg/hal/hal_if.h>             // Calling interface
#include <cyg/hal/hal_intr.h>           // Interrupt macros
#include <cyg/hal/sh3_sci.h>            // driver API
#include <cyg/hal/hal_misc.h>           // Helper functions
 
#define SCI_BASE ((cyg_uint8*)0xfffffe80)
 
//-----------------------------------------------------------------------------
 
 
void
cyg_hal_plf_comms_init(void)
{
    static int initialized = 0;
 
    if (initialized)
        return;
 
    initialized = 1;
 
    cyg_hal_plf_sci_init(0, 0, CYGNUM_HAL_INTERRUPT_SCI_RXI, SCI_BASE);
}
 
//=============================================================================
// Led control
//=============================================================================
#define LED_ON   0x04000000
#define LED_OFF  0x18000000
 
void
hal_diag_led_on( void )
{
    HAL_WRITE_UINT8(LED_ON, 0);
}
 
void
hal_diag_led_off( void )
{
    HAL_WRITE_UINT8(LED_OFF, 0);
}
 
 
//=============================================================================
// Compatibility with older stubs
//=============================================================================
 
#ifndef CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
 
#define CYGPRI_HAL_SH_SH3_SCI_PRIVATE
#include <cyg/hal/sh3_sci.h>            // driver API
 
static channel_data_t channel = { (cyg_uint8*)SCI_BASE, 0, 0};
 
#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
#include <cyg/hal/hal_stub.h>           // hal_output_gdb_string
#endif
 
#if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs)
 
#define CYG_HAL_DIAG_GDB
 
#elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
 
#define CYG_HAL_DIAG_GDB
 
#endif
 
//-----------------------------------------------------------------------------
 
void hal_diag_init(void)
{
    cyg_hal_plf_sci_init_channel(&channel);
}
 
void 
hal_diag_write_char_serial( char c )
{
    cyg_hal_plf_sci_putc(&channel, c);
}
 
void
hal_diag_read_char(char *c)
{
    *c = (char) cyg_hal_plf_sci_getc(&channel);
}
 
// Packet function
void 
hal_diag_write_char(char c)
{
#ifdef CYG_HAL_DIAG_GDB
    static char line[100];
    static int pos = 0;
 
    // No need to send CRs
    if( c == '\r' ) return;
 
    line[pos++] = c;
 
    if( c == '\n' || pos == sizeof(line) )
    {
        CYG_INTERRUPT_STATE old;
 
        // Disable interrupts. This prevents GDB trying to interrupt us
        // while we are in the middle of sending a packet. The serial
        // receive interrupt will be seen when we re-enable interrupts
        // later.
 
#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
        CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);
#else
        HAL_DISABLE_INTERRUPTS(old);
#endif
 
        while(1)
        {
            char c1;
            static char hex[] = "0123456789ABCDEF";
            cyg_uint8 csum = 0;
            int i;
 
            cyg_hal_plf_sci_putc(&channel, '$');
            cyg_hal_plf_sci_putc(&channel, 'O');
            csum += 'O';
            for( i = 0; i < pos; i++ )
            {
                char ch = line[i];
                char h = hex[(ch>>4)&0xF];
                char l = hex[ch&0xF];
                cyg_hal_plf_sci_putc(&channel, h);
                cyg_hal_plf_sci_putc(&channel, l);
                csum += h;
                csum += l;
            }
            cyg_hal_plf_sci_putc(&channel, '#');
            cyg_hal_plf_sci_putc(&channel, hex[(csum>>4)&0xF]);
            cyg_hal_plf_sci_putc(&channel, hex[csum&0xF]);
 
            // Wait for the ACK character '+' from GDB here and handle
            // receiving a ^C instead.
            c1 = (char) cyg_hal_plf_sci_getc(&channel);
 
            if( c1 == '+' )
                break;              // a good acknowledge
 
            // Check for user break.
            if( cyg_hal_is_break( &c1, 1 ) )
                cyg_hal_user_break( NULL );
 
            // otherwise, loop round again
        }
 
        pos = 0;
 
        // And re-enable interrupts
#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
        CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);
#else
        HAL_RESTORE_INTERRUPTS(old);
#endif
    }
#else // CYG_HAL_DIAG_GDB
    cyg_hal_plf_sci_putc(&channel, c);
#endif
}
#endif // CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
 
//-----------------------------------------------------------------------------
// End of hal_diag.c