Subversion Repositories openarty

////////////////////////////////////////////////////////////////////////////////

//

// Filename:    gpsdump.c

//

// Project:     OpenArty, an entirely open SoC based upon the Arty platform

//

// Purpose:     To dump the GPS UART to the auxiliary UART.

//

// Creator:     Dan Gisselquist, Ph.D.

//              Gisselquist Technology, LLC

//

////////////////////////////////////////////////////////////////////////////////

//

// Copyright (C) 2015-2016, Gisselquist Technology, LLC

//

// This program is free software (firmware): you can redistribute it and/or

// modify it under the terms of  the GNU General Public License as published

// by the Free Software Foundation, either version 3 of the License, or (at

// your option) any later version.

//

// This program is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with this program.  (It's in the $(ROOT)/doc directory, run make with no

// target there if the PDF file isn't present.)  If not, see

// <http://www.gnu.org/licenses/> for a copy.

//

// License:     GPL, v3, as defined and found on www.gnu.org,

//              http://www.gnu.org/licenses/gpl.html

//

//

////////////////////////////////////////////////////////////////////////////////

//

//

#include "artyboard.h"

#include "zipcpu.h"

#include "zipsys.h"

#define sys     _sys

void main(int argc, char **argv) {

        /*

        // Method one: direct polling

        while(1) {

                int     ch;

                ch = sys->io_gps_rx;

                if ((ch&UART_RX_ERR)==0)

                        sys->io_uart_tx = ch;

        }

        */

        // Method two: Waiting on interrupts

        int     lglen = (1<<((sys->io_gpsu.u_fifo >> 12)&0x0f))-1;

        zip->z_pic = SYSINT_GPSRXF;

        while(1) {

                while((zip->z_pic & SYSINT_GPSRXF)==0)

                        ;

                for(int i=0; i<lglen/2; i++)

                        sys->io_uart.u_tx = sys->io_gpsu.u_rx & 0x0ff;

                zip->z_pic = SYSINT_GPSRXF;

        }

        /*

        // Method three: Use the DMA

        zip->z_dma.d_ctrl = DMACLEAR;

        while(1) {

                zip->z_dma.d_rd = (int *)&sys->io_gps_rx;

                zip->z_dma.d_wr = (int *)&sys->io_uart_tx;

                zip->z_dma.d_len = 0x01000000; // More than we'll ever do ...

                zip->z_dma.d_ctrl = (DMAONEATATIME|DMA_CONSTDST|DMA_CONSTSRC|DMA_ONGPSRX);

                while(zip->z_dma.d_ctrl & DMA_BUSY) {

                        zip_idle();

                        if (zip->z_dma.d_ctrl & DMA_ERR)

                                zip_halt();

                }

        }

        */

}