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/*!
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/*!
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ZTEX Firmware Kit for EZ-USB Microcontrollers
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ZTEX Firmware Kit for EZ-USB FX2 Microcontrollers
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Copyright (C) 2009-2010 ZTEX e.K.
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Copyright (C) 2009-2011 ZTEX GmbH.
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http://www.ztex.de
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http://www.ztex.de
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 3 as
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it under the terms of the GNU General Public License version 3 as
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published by the Free Software Foundation.
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published by the Free Software Foundation.
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/*
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/*
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Common functions for FPGA configuration from flash memory
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Common functions for FPGA configuration from flash memory
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*/
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*/
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code BYTE fpga_flash_boot_id[] = {'Z','T','E', 'X', 'B', 'S', '\1', '\1'};
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__code BYTE fpga_flash_boot_id[] = {'Z','T','E', 'X', 'B', 'S', '\1', '\1'};
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/* *********************************************************************
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/* *********************************************************************
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***** fpga_configure_from_flash *************************************
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***** fpga_configure_from_flash *************************************
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********************************************************************* */
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********************************************************************* */
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/*
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/*
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Configure the FPGA using a bitstream from flash.
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Configure the FPGA using a bitstream from flash.
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If force == 0 a already configured FPGA is not re-configured.
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If force == 0 a already configured FPGA is not re-configured.
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Return values:
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Return values:
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0 : configuration successfull
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0 : Configuration successful
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1 : fpga already configured
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1 : FPGA already configured
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2 : Flash error
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2 : Flash error
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3 : No bitstream found
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3 : No bitstream found
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4 : Configuration error
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4 : Configuration error
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The format of the boot sector (secor 0 of the flash memeory) is
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The format of the boot sector (secor 0 of the flash memeory) is
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flash_read_finish(flash_sector_size - 12); // dummy-read the rest of the sector + finish read opration
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flash_read_finish(flash_sector_size - 12); // dummy-read the rest of the sector + finish read opration
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if ( i==0 )
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if ( i==0 )
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return 3;
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return 3;
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// read the bitstream
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// read the bitstream
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for ( k=1; k<i; k++ ) {
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if ( flash_read_init( 1 ) ) // prepare reading sector k
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if ( flash_read_init( k ) ) // prepare reading sector k
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return 2;
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return 2;
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for ( k=1; k<i; k++ ) {
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fpga_send_bitstream_from_flash( flash_sector_size );
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fpga_send_bitstream_from_flash( flash_sector_size );
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flash_read_finish(0); // finish read opration
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if ( flash_read_next() ) // prepare reading next sector
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}
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if ( flash_read_init( i ) ) // prepare reading sector i
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return 2;
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return 2;
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}
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fpga_send_bitstream_from_flash( j );
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fpga_send_bitstream_from_flash( j );
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flash_read_finish(flash_sector_size - j); // finish read opration
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flash_read_finish(flash_sector_size - j); // finish read opration
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finish_fpga_configuration(); // finish the FPGA configuration
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finish_fpga_configuration(); // finish the FPGA configuration
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