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//=========================================================================//
// //
// PonyProg - Serial Device Programmer //
// //
// Copyright (C) 1997-2019 Claudio Lanconelli //
// //
// http://ponyprog.sourceforge.net //
// //
//-------------------------------------------------------------------------//
// //
// 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 version2 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 (see LICENSE); if not, write to the //
// Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. //
// //
//=========================================================================//
#include "types.h"
#include "globals.h"
#include "spi-bus.h"
#include "errcode.h"
#include "e2cmdw.h"
#include <QDebug>
#include <QtCore>
#ifdef Q_OS_LINUX
# include <unistd.h>
#else
# ifdef __BORLANDC__
# define __inline__
# else // _MICROSOFT_ VC++
# define __inline__ __inline
# define _export
# endif
#endif
// Costruttore
SPIBus::SPIBus(BusInterface *ptr, bool cpha)
: BusIO(ptr),
fall_edge_sample(cpha)
{
}
// Distruttore
SPIBus::~SPIBus()
{
// Close();
}
void SPIBus::SetDelay()
{
int val = E2Profile::GetSPISpeed();
int n;
switch (val)
{
case TURBO:
n = 0; // as fast as your PC can
break;
case FAST:
n = 1;
break;
case SLOW:
n = 10;
break;
case VERYSLOW:
n = 80;
break;
case ULTRASLOW:
n = 1000;
break;
default:
n = 5; //Default (< 100KHz)
break;
}
BusIO::SetDelay(n);
qDebug() << "SPIBus::SetDelay() = " << n;
}
int SPIBus::SendDataBit(int b)
{
if (fall_edge_sample)
{
setSCK(); //be sure the SCK line is high
bitMOSI(b);
WaitUsec(shot_delay);
clearSCK(); //slave latches data bit now!
WaitUsec(shot_delay);
}
else
{
clearSCK(); //be sure the SCK line is low
bitMOSI(b);
WaitUsec(shot_delay);
setSCK(); //slave latches data bit now!
WaitUsec(shot_delay);
clearSCK();
}
return OK;
}
// ritorna un numero negativo se c'e` un errore, altrimenti 0 o 1
int SPIBus::RecDataBit()
{
register uint8_t b;
if (fall_edge_sample)
{
setSCK(); //be sure the SCK line is high
WaitUsec(shot_delay);
clearSCK();
b = getMISO();
WaitUsec(shot_delay);
}
else
{
clearSCK(); //be sure the SCK line is low
WaitUsec(shot_delay);
setSCK();
b = getMISO();
WaitUsec(shot_delay);
clearSCK();
}
return b;
}
// OK, ora ci alziamo di un livello: operiamo sul byte
int SPIBus::SendDataByte(int by)
{
int k;
clearSCK();
//MSbit (7) sent first
for (k = 7; k >= 0; k--)
{
SendDataBit(by & (1 << k));
}
setMOSI();
return OK;
}
int SPIBus::RecDataByte()
{
int k, val = 0;
setMOSI();
clearSCK();
for (k = 7; k >= 0; k--)
if (RecDataBit())
{
val |= 1 << k;
}
return val;
}
int SPIBus::Reset(void)
{
qDebug() << "SPIBus::Reset() I";
SetDelay();
clearSCK(); // Dal datasheet AVR
setMOSI(); // the datasheet don't specify, but we need to provide power from at least one line (MOSI while SCK and RESET are low)
WaitMsec(20);
ClearReset(); //One pulse on the reset (datasheet AVR)
WaitMsec(E2Profile::GetSPIResetPulse()); //AppNote AVR910 suggest >100 msec
SetReset();
WaitMsec(E2Profile::GetSPIDelayAfterReset());
qDebug() << "SPIBus::Reset() O";
return OK;
}
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