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/*------------------------------------------------------------------------------
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-- This file is a part of the libuc, microcontroler library
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-- Copyright (C) 2013, Alexis Jeandet
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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 3 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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-- Author : Alexis Jeandet
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-- Mail : alexis.jeandet@member.fsf.org
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-------------------------------------------------------------------------------*/
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#include <ADS7843.h>
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#include <core.h>
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int ads7843init(ADS7843_t *dev, spi_t spidev,void (*setnCS)(char),int (*busy)())
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{
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dev->spidev = spidev;
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dev->setnCS = setnCS;
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dev->busy = busy;
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dev->setnCS(1);
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return 1;
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}
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int ads7843read(ADS7843_t *dev,int* x,int* y)
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{
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int data;
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*x=0;
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*y=0;
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spiputw(dev->spidev,0x97);
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// delay_100us(2);
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while(dev->busy());
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spigetw2(dev->spidev,0);
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spigetw2(dev->spidev,0);
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delay_100us(100);
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for(int i=0;i<32;i++)
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{
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data=0;
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dev->setnCS(0);
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spiputw(dev->spidev,0x97);
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//delay_100us(2);
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while(dev->busy());
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data= (0x0FF & spigetw2(dev->spidev,0))<<8;
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data+= 0x0FF & spigetw2(dev->spidev,0);
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*x+=data>>4;
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dev->setnCS(1);
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delay_100us(10);
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}
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spiputw(dev->spidev,0xd7);
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// delay_100us(2);
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while(dev->busy());
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spigetw2(dev->spidev,0);
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spigetw2(dev->spidev,0);
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delay_100us(10);
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for(int i=0;i<32;i++)
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{
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data=0;
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dev->setnCS(0);
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spiputw(dev->spidev,0xd7);
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// delay_100us(2);
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while(dev->busy());
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data= (spigetw2(dev->spidev,0))<<8;
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data+= spigetw2(dev->spidev,0);
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*y+=data>>4;
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dev->setnCS(1);
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delay_100us(10);
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}
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*x/=32;
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*y/=32;
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return 1;
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}
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