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ZTEX |
/*!
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Java host software API of ZTEX SDK
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Copyright (C) 2009-2014 ZTEX GmbH.
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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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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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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see http://www.gnu.org/licenses/.
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!*/
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package ztex;
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import java.io.*;
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import java.util.*;
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import ch.ntb.usb.*;
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/**
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* Provides methods for uploading firmware to Cypress EZ-USB devices.
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*/
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public class EzUsb {
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// ******* reset **************************************************************
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/**
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* Controls the reset state of a Cypress EZ-USB device.
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* @param handle The handle of the device.
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* @param r The reset state (true means reset).
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* @throws FirmwareUploadException if an error occurred while attempting to control the reset state.
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*/
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public static void reset ( long handle, boolean r ) throws FirmwareUploadException {
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byte buffer[] = { (byte) (r ? 1 : 0) };
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int k = LibusbJava.usb_control_msg(handle, 0x40, 0xA0, 0xE600, 0, buffer, 1, 1000); // upload j bytes
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if ( k<0 )
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throw new FirmwareUploadException( LibusbJava.usb_strerror() + ": unable to set reset="+buffer[0] );
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else if ( k!=1 )
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throw new FirmwareUploadException( "Unable to set reset="+buffer[0] );
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try {
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Thread.sleep( r ? 50 : 400 ); // give the firmware some time for initialization
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}
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catch ( InterruptedException e ) {
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}
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}
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// ******* uploadFirmware ******************************************************
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/**
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* Uploads the Firmware to a Cypress EZ-USB device.
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* @param handle The handle of the device.
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* @param ihxFile The firmware image.
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* @return the upload time in ms.
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* @throws FirmwareUploadException if an error occurred while attempting to upload the firmware.
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*/
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public static long uploadFirmware (long handle, IhxFile ihxFile ) throws FirmwareUploadException {
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final int transactionBytes = 256;
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byte[] buffer = new byte[transactionBytes];
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reset( handle, true ); // reset = 1
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long t0 = new Date().getTime();
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int j = 0;
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for ( int i=0; i<=ihxFile.ihxData.length; i++ ) {
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if ( i >= ihxFile.ihxData.length || ihxFile.ihxData[i] < 0 || j >=transactionBytes ) {
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if ( j > 0 ) {
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int k = LibusbJava.usb_control_msg(handle, 0x40, 0xA0, i-j, 0, buffer, j, 1000); // upload j bytes
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if ( k<0 )
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throw new FirmwareUploadException(LibusbJava.usb_strerror());
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else if ( k!=j )
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throw new FirmwareUploadException();
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try {
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Thread.sleep( 1 ); // to avoid package loss
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}
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catch ( InterruptedException e ) {
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}
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}
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j = 0;
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}
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if ( i < ihxFile.ihxData.length && ihxFile.ihxData[i] >= 0 && ihxFile.ihxData[i] <= 255 ) {
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buffer[j] = (byte) ihxFile.ihxData[i];
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j+=1;
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}
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}
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long t1 = new Date().getTime();
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try {
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EzUsb.reset(handle,false); // error (may caused re-numeration) can be ignored
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}
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catch ( FirmwareUploadException e ) {
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}
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return t1 - t0;
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}
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}
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