dc9c6c9667
Previously CPLD programming involved a large 64kbyte buffer into which the the entire bitstream would be completely downloaded, and at which point the programming process would commence. This is needlessly wasteful of memory. Moreover, it could lead to USB timeouts as the firmware needs to wait the entire duration of the programming process before returning an ACK to the host after the final SETUP data phase packet. Instead, we now receive 512 byte chunks of the bitstream and stream them to the CPLD one at a time. We wait for each packet to be streamed out to the CPLD before ACKing the packet to prevent active data being overwritten.
36 lines
1.4 KiB
C
36 lines
1.4 KiB
C
/*
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* Copyright 2012 Jared Boone
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*
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* This file is part of HackRF.
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*
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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 as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include <stdint.h>
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extern uint8_t usb_descriptor_device[];
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extern uint8_t usb_descriptor_device_qualifier[];
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extern uint8_t usb_descriptor_configuration_full_speed[];
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extern uint8_t usb_descriptor_configuration_high_speed[];
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extern uint8_t usb_descriptor_configuration_cpld_update_full_speed[];
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extern uint8_t usb_descriptor_configuration_cpld_update_high_speed[];
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extern uint8_t usb_descriptor_string_languages[];
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extern uint8_t usb_descriptor_string_manufacturer[];
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extern uint8_t usb_descriptor_string_product[];
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extern uint8_t usb_descriptor_string_serial_number[];
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extern uint8_t* usb_descriptor_strings[];
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