Subversion Repositories usb_fpga_1_2

/*!

   flashdemo -- Flash memory example

   Copyright (C) 2008-2009 ZTEX e.K.

   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

// Cypress vendor ID and product ID may only (!) be used for experimental purposes

SET_VPID(0x4b4,0x8613);

// select ZTEX USB Module 1.0 as target (required for FLASH support)

IDENTITY_UM_1_0(10.20.0.0,0);

// uncomment the following line and comment the line above to run this example on ZTEX USB Module 1.2

//IDENTITY_UFM_1_2(10.11.0.0,0);         

// enable Flash support

ENABLE_FLASH;

// this product string is also used for identification of the firmware in FlashDemo.java

#define[PRODUCT_STRING]["Flash demo"]

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(&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(&sector, 4);                        // write the current sector number

        flash_write_finish(flash_sector_size - 4);      // dummy-write the rest of the sector + finish write operation

        flash_write_init( sector );                     // prepare writing sector sector

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

        flash_write_finish(flash_sector_size - sizeof(flash_string));   // dummy-write the rest of the sector + finish write operation

    }

    while (1) { }                                       //  twiddle thumbs

}