upload.c

Go to the documentation of this file.

/*
 *      This program 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 of the License, or (at your option) any later version.
 *
 *  Copyright 1999-2005 Michael Klein <michael(dot)klein(at)puffin(dot)lb(dot)shuttle(dot)de>
 *  Copyright 2001-2005 Spiro Trikaliotis
 *
*/

#define DBG_USERMODE

#define DBG_PROGNAME "OPENCBM.DLL"

#include "debug.h"

#include <stdlib.h>

#define DLL
#include "opencbm.h"
#include "archlib.h"


/*-------------------------------------------------------------------*/
/*--------- HELPER FUNCTIONS ----------------------------------------*/


int CBMAPIDECL
cbm_upload(CBM_FILE HandleDevice, __u_char DeviceAddress, 
           int DriveMemAddress, const void *Program, size_t Size)
{
    const char *bufferToProgram = Program;

    unsigned char command[] = { 'M', '-', 'W', ' ', ' ', ' ' };
    size_t i;
    int rv = 0;
    int c;

    FUNC_ENTER();

    DBG_ASSERT(sizeof(command) == 6);

    for(i = 0; i < Size; i += 32)
    {
        cbmarch_listen(HandleDevice, DeviceAddress, 15);

        // Calculate how much bytes are left

        c = Size - i;

        // Do we have more than 32? Than, restrict to 32

        if (c > 32)
        {
            c = 32;
        }

        // The command M-W consists of:
        // M-W <lowaddress> <highaddress> <count>
        // build that command:

        command[3] = (unsigned char) (DriveMemAddress % 256);
        command[4] = (unsigned char) (DriveMemAddress / 256);
        command[5] = (unsigned char) c; 

        // Write the M-W command to the drive...

        cbmarch_raw_write(HandleDevice, command, sizeof(command));

        // ... as well as the (up to 32) data bytes

        cbmarch_raw_write(HandleDevice, bufferToProgram, c);

        // Now, advance the pointer into drive memory
        // as well to the program in PC's memory in case we
        // might need to use it again for another M-W command

        DriveMemAddress += c;
        bufferToProgram += c;

        // Advance the return value of send bytes, too.

        rv += c;

        // The UNLISTEN is the signal for the drive 
        // to start execution of the command

        cbmarch_unlisten(HandleDevice);
    }

    FUNC_LEAVE_INT(rv);
}

---