|
|
/*------------------------------------------------------------------------------
|
|
|
-- This file is a part of the libuc, microcontroler library
|
|
|
-- Copyright (C) 2013, Alexis Jeandet
|
|
|
--
|
|
|
-- This program is free software; 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
|
|
|
-- MERCHANTABILITY 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; if not, write to the Free Software
|
|
|
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
-------------------------------------------------------------------------------
|
|
|
-- Author : Alexis Jeandet
|
|
|
-- Mail : alexis.jeandet@member.fsf.org
|
|
|
-------------------------------------------------------------------------------*/
|
|
|
|
|
|
#include <ADS7843.h>
|
|
|
#include <core.h>
|
|
|
|
|
|
int ads7843init(ADS7843_t *dev, spi_t spidev,void (*setnCS)(char),int (*busy)())
|
|
|
{
|
|
|
dev->spidev = spidev;
|
|
|
dev->setnCS = setnCS;
|
|
|
dev->busy = busy;
|
|
|
dev->setnCS(1);
|
|
|
return 1;
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
int ads7843read(ADS7843_t *dev,int* x,int* y)
|
|
|
{
|
|
|
int data;
|
|
|
*x=0;
|
|
|
*y=0;
|
|
|
spiputw(dev->spidev,0x97);
|
|
|
// delay_100us(2);
|
|
|
while(dev->busy());
|
|
|
spigetw2(dev->spidev,0);
|
|
|
spigetw2(dev->spidev,0);
|
|
|
delay_100us(100);
|
|
|
for(int i=0;i<32;i++)
|
|
|
{
|
|
|
data=0;
|
|
|
dev->setnCS(0);
|
|
|
spiputw(dev->spidev,0x97);
|
|
|
//delay_100us(2);
|
|
|
while(dev->busy());
|
|
|
data= (0x0FF & spigetw2(dev->spidev,0))<<8;
|
|
|
data+= 0x0FF & spigetw2(dev->spidev,0);
|
|
|
*x+=data>>4;
|
|
|
dev->setnCS(1);
|
|
|
delay_100us(10);
|
|
|
}
|
|
|
spiputw(dev->spidev,0xd7);
|
|
|
// delay_100us(2);
|
|
|
while(dev->busy());
|
|
|
spigetw2(dev->spidev,0);
|
|
|
spigetw2(dev->spidev,0);
|
|
|
delay_100us(10);
|
|
|
for(int i=0;i<32;i++)
|
|
|
{
|
|
|
data=0;
|
|
|
dev->setnCS(0);
|
|
|
spiputw(dev->spidev,0xd7);
|
|
|
// delay_100us(2);
|
|
|
while(dev->busy());
|
|
|
data= (spigetw2(dev->spidev,0))<<8;
|
|
|
data+= spigetw2(dev->spidev,0);
|
|
|
*y+=data>>4;
|
|
|
dev->setnCS(1);
|
|
|
delay_100us(10);
|
|
|
}
|
|
|
*x/=32;
|
|
|
*y/=32;
|
|
|
return 1;
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|