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#include <iostream>
#include "spisrc.h"
#include "avrerror.h"
using namespace std;
SpiSource::SpiSource( const char* fileName,
Net& ssNet,
Net& sclkNet,
Net& mosiNet
) throw():
_ss(),
_sclk(),
_mosi(),
_spiFile(fileName)
{
_ss.outState = Pin::HIGH;
ssNet.Add(&_ss);
_sclk.outState = Pin::HIGH;
sclkNet.Add(&_sclk);
_mosi.outState = Pin::HIGH;
mosiNet.Add(&_mosi);
if(!_spiFile)
avr_error("Cannot open SPI Source input file '%s'", fileName);
}
static char* readNextLine(std::ifstream& f,char* buffer,unsigned len,SystemClockOffset *timeToNextStepIn_ns){
*timeToNextStepIn_ns = 100000; // Once every 100 microseconds
for(unsigned i=0;i<2;++i){
while(f.getline(buffer, len)){
if(buffer[0] == '#') continue;
return buffer;
}
*timeToNextStepIn_ns = 1000000; // Once every 100 microseconds
f.clear();
f.seekg (0, ios::beg);
}
return 0;
}
int SpiSource::Step(bool &trueHwStep, SystemClockOffset *timeToNextStepIn_ns){
if(!_spiFile) return 0;
char lineBuffer[1024];
if(!readNextLine(_spiFile,lineBuffer,sizeof(lineBuffer),timeToNextStepIn_ns)){
_spiFile.close();
return 0;
}
char* p = lineBuffer;
unsigned long ss = strtoul(p, &p, 0);
unsigned long sclk = strtoul(p, &p, 0);
unsigned long output = strtoul(p, &p, 0);
_ss = (ss)?'H':'L';
_sclk = (sclk)?'H':'L';
_mosi = (output)?'H':'L';
return 0;
}
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