mirror of
https://github.com/gnss-sdr/gnss-sdr
synced 2025-10-30 23:03:05 +00:00
b849b20a8c
- Added a pre-compiled custom GN3S firmware. - Added a fully-compliant GNU Radio source block for GN3S USB dongle. It can be used also from GNU Radio companion and from Python applications. - Added a new GN3S_Signal_Source block. It is possible to disable the GN3S signal source compilation. See README. git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@217 64b25241-fba3-4117-9849-534c7e92360d
168 lines
4.0 KiB
C
168 lines
4.0 KiB
C
/* -*- c++ -*- */
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/*
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* Copyright 2003 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio 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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* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "isr.h"
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#include "fx2regs.h"
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#include "syncdelay.h"
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extern xdata unsigned char _standard_interrupt_vector[];
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extern xdata unsigned char _usb_autovector[];
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extern xdata unsigned char _fifo_gpif_autovector[];
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#define LJMP_OPCODE 0x02
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/*
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* Hook standard interrupt vector.
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*
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* vector_number is from the SV_<foo> list.
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* addr is the address of the interrupt service routine.
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*/
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void
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hook_sv (unsigned char vector_number, unsigned short addr)
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{
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bit t;
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// sanity checks
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if (vector_number < SV_MIN || vector_number > SV_MAX)
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return;
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if ((vector_number & 0x0f) != 0x03 && (vector_number & 0x0f) != 0x0b)
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return;
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t = EA;
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EA = 0;
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_standard_interrupt_vector[vector_number] = LJMP_OPCODE;
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_standard_interrupt_vector[vector_number + 1] = addr >> 8;
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_standard_interrupt_vector[vector_number + 2] = addr & 0xff;
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EA = t;
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}
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/*
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* Hook usb interrupt vector.
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*
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* vector_number is from the UV_<foo> list.
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* addr is the address of the interrupt service routine.
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*/
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void
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hook_uv (unsigned char vector_number, unsigned short addr)
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{
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bit t;
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// sanity checks
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if (vector_number < UV_MIN || vector_number > UV_MAX)
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return;
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if ((vector_number & 0x3) != 0)
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return;
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t = EA;
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EA = 0;
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_usb_autovector[vector_number] = LJMP_OPCODE;
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_usb_autovector[vector_number + 1] = addr >> 8;
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_usb_autovector[vector_number + 2] = addr & 0xff;
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EA = t;
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}
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/*
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* Hook fifo/gpif interrupt vector.
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*
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* vector_number is from the FGV_<foo> list.
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* addr is the address of the interrupt service routine.
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*/
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void
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hook_fgv (unsigned char vector_number, unsigned short addr)
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{
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bit t;
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// sanity checks
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if (vector_number < FGV_MIN || vector_number > FGV_MAX)
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return;
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if ((vector_number & 0x3) != 0)
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return;
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t = EA;
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EA = 0;
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_fifo_gpif_autovector[vector_number] = LJMP_OPCODE;
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_fifo_gpif_autovector[vector_number + 1] = addr >> 8;
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_fifo_gpif_autovector[vector_number + 2] = addr & 0xff;
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EA = t;
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}
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/*
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* One time call to enable autovectoring for both USB and FIFO/GPIF.
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*
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* This disables all USB and FIFO/GPIF interrupts and clears
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* any pending interrupts too. It leaves the master USB and FIFO/GPIF
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* interrupts enabled.
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*/
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void
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setup_autovectors (void)
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{
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// disable master usb and fifo/gpif interrupt enables
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EIUSB = 0;
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EIEX4 = 0;
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hook_sv (SV_INT_2, (unsigned short) _usb_autovector);
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hook_sv (SV_INT_4, (unsigned short) _fifo_gpif_autovector);
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// disable all fifo interrupt enables
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SYNCDELAY;
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EP2FIFOIE = 0; SYNCDELAY;
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EP4FIFOIE = 0; SYNCDELAY;
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EP6FIFOIE = 0; SYNCDELAY;
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EP8FIFOIE = 0; SYNCDELAY;
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// clear all pending fifo irqs
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EP2FIFOIRQ = 0xff; SYNCDELAY;
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EP4FIFOIRQ = 0xff; SYNCDELAY;
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EP6FIFOIRQ = 0xff; SYNCDELAY;
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EP8FIFOIRQ = 0xff; SYNCDELAY;
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IBNIE = 0;
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IBNIRQ = 0xff;
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NAKIE = 0;
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NAKIRQ = 0xff;
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USBIE = 0;
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USBIRQ = 0xff;
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EPIE = 0;
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EPIRQ = 0xff;
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SYNCDELAY; GPIFIE = 0;
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SYNCDELAY; GPIFIRQ = 0xff;
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USBERRIE = 0;
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USBERRIRQ = 0xff;
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CLRERRCNT = 0;
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INTSETUP = bmAV2EN | bmAV4EN | bmINT4IN;
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// clear master irq's for usb and fifo/gpif
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EXIF &= ~bmEXIF_USBINT;
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EXIF &= ~bmEXIF_IE4;
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// enable master usb and fifo/gpif interrrupts
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EIUSB = 1;
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EIEX4 = 1;
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}
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