mirror of
https://github.com/gnss-sdr/gnss-sdr
synced 2024-07-12 06:34:23 +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
115 lines
2.4 KiB
C
115 lines
2.4 KiB
C
/*
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* Code from: USRP - Universal Software Radio Peripheral (GNU Radio)
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*
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* Initial modifications by:
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*
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* Stephan Esterhuizen, Aerospace Engineering Sciences
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* University of Colorado at Boulder
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* Boulder CO, USA
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*
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* Further modifications for use with the SiGe USB module to accompany
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* the textbook: "A Software-Defined GPS and Galileo Receiver: A
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* Single-Frequency Approach" by Kai Borre, Dennis Akos, et.al. by:
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*
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* Marcus Junered, GNSS Research Group
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* Lulea University of Technology
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* Lulea, Sweden
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* junered@ltu.se
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*
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*Futher modified for usage with a new frontend PCB
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* by Oscar Isoz GNSS Research Group
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* Lulea University of Technology
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* Lulea, Sweden
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* ---------------------------------------------------------------------
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*
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* GN3S - GNSS IF Streamer for Windows
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* Copyright (C) 2006 Marcus Junered
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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 of the License, or
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* (at your option) 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; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "gn3s_se4110.h"
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static unsigned short idx = 0;
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char init_se4110(void)
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{
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/* D1,D5-D7 are inputs */
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IOD = 0xff;
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OED = 0xff;
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// OED = 0x1D; // Set Port D as outputs, except ADC_DOUT
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/* Set all "config" ports */
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A0 = 1;
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A1 = 0;
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A2 = 0;
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A3 = 1;
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A4 = 0;
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A5 = 0;
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A7 = 1;
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OEA = 0xBF; // Set Port A as output
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return 0;
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}
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short fifo_status() {
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return idx;
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}
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char program_3w(void)
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{
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char i;
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char by0, by1;
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by0 =0x18;
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by1 =0xA4;
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OEA = 0xFF;
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A3 = 0;
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A0 = 0;
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for (i=7; i>=0; i--) {
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A1 = (by1 >> i) & 0x1;
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A2 = 1;
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A2 = 0;
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}
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/* Latch Enable */
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A0 = 1;
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A0 = 0;
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for (i=7; i>=0; i--) {
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A1 = (by0 >> i) & 0x1;
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A2 = 1;
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A2 = 0;
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}
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/* Latch Enable */
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A0 = 1;
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OEA = 0xB9;
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return 0;
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}
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