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 "zipsys.h"
#include "artyboard.h"
 
void entry(void) {
/*
	// Method one: direct polling
	while(1) {
		int	ch;
		ch = sys->io_gps_rx;
		if ((ch&-256)==0)
			sys->io_uart_tx = ch;
	}
*/
	// Method two: Waiting on interrupts
	zip->pic = SYSINT_GPSRX;
	while(1) {
		while((zip->pic & SYSINT_GPSRX)==0)
			;
		sys->io_uart_tx = sys->io_gps_rx;
		zip->pic = SYSINT_GPSRX;
	}
 
	/*
	// Method three: Use the DMA
	zip->dma.ctrl = DMACLEAR;
	while(1) {
		zip->dma.rd = &sys->io_gps_rx;
		zip->dma.wr = &sys->io_uart_tx;
		zip->dma.len = 0x01000000; // More than we'll ever do ...
		zip->dma.ctrl = (DMAONEATATIME|DMA_CONSTDST|DMA_CONSTSRC|DMA_GPSRX);
		// zip->dma.ctrl = (DMAONEATATIME|DMA_CONSTDST|DMA_CONSTSRC);
 
		while(zip->dma.ctrl & 0x80000000)
			if (zip->dma.ctrl & 0x40000000)
				zip_halt();;
	}
	*/
}