long long
findmax (int depth, int level, int pos)
{
int curr_width = depth;
int curr_start = series (depth - 1, TRI);
int current = retval(depth, pos);
// reached the end of this search
if (level == 1)
return current;
// top of the pyramid
if (depth < 2)
return tri[0];
// far left edge
if (pos == 1)
return (findmax (depth - 1, level - 1, pos) + current);
// far right edge
if (pos == curr_width)
return (findmax (depth - 1, level - 1, pos - 1) + current);
// find the maximum value and return it
current += maxlong (
// look left
findmax (depth - 1, level - 1, pos-1),
// look right
findmax (depth - 1, level - 1, pos));
return current;
}
/// \brief Sets the samplerate of the oscilloscope.
/// \param samplerate The samplerate that should be met (S/s).
/// \return The samplerate that has been set.
unsigned long int fd_runtime_setsamplerate5200(FDRuntime* self, unsigned short int samplerateId)
{
unsigned long int samplerate = self->samplerates[samplerateId];
if(!fd_runtime_getdeviceisconnected(self) || samplerate == 0)
return 0;
// Pointers to needed commands
FDCommandSetSamplerate5200* ss = (FDCommandSetSamplerate5200*)g_object_ref(self->commands[COMMAND_SETSAMPLERATE5200]);
//FDCommandSetBuffer5200* sb = (FDCommandSetBuffer5200*)g_object_ref(self->commands[COMMAND_SETBUFFER5200]);
FDCommandSetTrigger5200* st = (FDCommandSetTrigger5200*)g_object_ref(self->commands[COMMAND_SETTRIGGER5200]);
unsigned char fastRate;
unsigned short int value;
unsigned char byte3;
if (generate5200DividerValue(samplerate, &fastRate, &byte3, &value) < 0)
{
// Not using fastRate, because all fastRate modes are not dynamically generated.
self->samplerateMax = self->samplerateChannelMax;
if (fastRate)
self->samplerateMax = self->samplerateFastMax;
// The maximum sample rate depends on the buffer size
unsigned int bufferDivider = 1;/*
switch(commandSetBuffer5200->getBufferSize()) {
case BUFFERID_ROLL:
bufferDivider = 1000;
break;
case BUFFERID_LARGE:
bufferDivider = 2;
break;
default:
break;
}*/
// Get divider that would provide the requested rate, can't be zero
self->samplerateMax /= bufferDivider;
self->samplerateDivider = maxlong(self->samplerateMax / samplerate, (long unsigned int) 1);
// Use normal mode if we need valueSlow or it would meet the rate at least as exactly as fast rate mode
if(fastRate) {
unsigned long int slowSamplerate = self->samplerateChannelMax / bufferDivider;
unsigned long int slowDivider = maxlong(slowSamplerate / samplerate, (long unsigned int) 1);
if(self->samplerateDivider > 4 || (abs((double) slowSamplerate / slowDivider - samplerate) <= abs(((double) self->samplerateMax / self->samplerateDivider) - samplerate))) {
fastRate = FALSE;
self->samplerateMax = slowSamplerate;
self->samplerateDivider = slowDivider;
}
}
g_message("Calculating new samplerate values. Requesting %lu S/s",samplerate);
g_message("Using Samplerate: %lu Using Divider: %lu", self->samplerateMax, self->samplerateDivider);
// Split the resulting divider into the values understood by the device
double computed = ((double)self->samplerateDivider - 3.0)/2.0;
value = maxshort((unsigned short int)(computed+0.5), (unsigned short int)0);
} else {
self->samplerateMax = self->samplerateChannelMax;
if (fastRate)
self->samplerateMax = self->samplerateFastMax;
self->samplerateDivider = maxlong(self->samplerateMax / samplerate, (long unsigned int) 1);
}
g_message("Value= %u Byte3= %i fastMode= %i",value, (unsigned int)byte3, (unsigned int)fastRate);
// Store samplerate fast value
fd_commandsetsamplerate5200_setSamplerateFast(ss, byte3);
// Store samplerate slow value (two's complement)
fd_commandsetsamplerate5200_setSamplerateSlow(ss, 0xffff - value);
// Set fast rate when used
fd_commandsettrigger5200_setFastRate(st, fastRate);
g_object_unref(ss);
g_object_unref(st);
self->commandPending[COMMAND_SETSAMPLERATE5200] = TRUE;
self->commandPending[COMMAND_SETTRIGGER5200] = TRUE;
//self->updateBufferSize(self->bufferSize);
//self->setTriggerSlope(self->triggerSlope);
return self->samplerateMax / self->samplerateDivider;
}
