Subversion Repositories usb_fpga_2_13

/*!

   flashdemo -- demo for Flash memory access from firmware and host software for ZTEX USB-FPGA Modules 2.16

   Copyright (C) 2009-2014 ZTEX GmbH.

   http://www.ztex.de

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License version 3 as

   published by the Free Software Foundation.

   This program 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 this program; if not, see http://www.gnu.org/licenses/.

!*/

#include[ztex-conf.h]   // Loads the configuration macros, see ztex-conf.h for the available macros

#include[ztex-utils.h]  // include basic functions and variables

// select ZTEX USB FPGA Module 2.16 as target  (required for FPGA configuration)

IDENTITY_UFM_2_16(10.16.0.0,0);

// enable Flash support

ENABLE_FLASH;

// this product string is also used for identification by the host software

#define[PRODUCT_STRING]["Flash demo for UFM 2.16"]

__code char flash_string[] = "Hello World!";

// include the main part of the firmware kit, define the descriptors, ...

#include[ztex.h]

void main(void)

{

    __xdata DWORD sector;

    init_USB();                                         // init everything

    if ( flash_enabled ) {

        flash_read_init( 0 );                            // prepare reading sector 0

        flash_read((__xdata BYTE*) &sector, 4);         // read the number of last sector 

        flash_read_finish(flash_sector_size - 4);       // dummy-read the rest of the sector + finish read operation

        sector++;

        if ( sector > flash_sectors || sector == 0 ) {

            sector = 1;

        }

        flash_write_init( 0 );                                   // prepare writing sector 0

        flash_write((__xdata BYTE*) &sector, 4);                // write the current sector number

        flash_write_finish_sector(flash_sector_size - 4);       // dummy-write the rest of the sector + CRC

        flash_write_finish();                                   // finish write operation

        flash_write_init( sector );                                             // prepare writing sector sector

        flash_write((__xdata BYTE*) flash_string, sizeof(flash_string));        // write the string 

        flash_write_finish_sector(flash_sector_size - sizeof(flash_string));    // dummy-write the rest of the sector + CRC

        flash_write_finish();                                                   // finish write operation

    }

    while (1) { }                                       //  twiddle thumbs

}