void CCrossDlg::SetInfo(const INFO& Info)
{
SetPos(Info.Pos);
SetSeconds(Info.Seconds);
Loop(Info.Loop);
SetWaveform(Info.Waveform);
}
/*******************************************************************************
* Function Name: ChangeFrequency
********************************************************************************
*
* Summary
* Stops the selected WaveDAC, modifies its array of samples according to the
* desired frequency, and starts the DAC again.
*
* Parameters:
* freq - the desired frequency
*
* Return:
* The new frequency, or -1 if the desired frequency was invalid
*
*******************************************************************************/
int ChangeFrequency(int freq, int mode, uint8 voltage, int waveDacId)
{
int fnGenerator, numSamples;
uint8 *currentWaveform;
uint8 voltage255;
if (freq < FREQ_LOWER_LIMIT) {
freq = FREQ_LOWER_LIMIT;
} else if (freq > FREQ_UPPER_LIMIT) {
freq = FREQ_UPPER_LIMIT;
}
if (freq < 2000) {
if (waveDacId == 0) {
fnGenerator = WAVEDAC_LOW_0;
} else if (waveDacId == 1) {
fnGenerator = WAVEDAC_LOW_1;
}
numSamples = WAVEDAC_CLOCK_LOW_FREQ / freq;
} else {
if (waveDacId == 0) {
fnGenerator = WAVEDAC_HIGH_0;
} else if (waveDacId == 1) {
fnGenerator = WAVEDAC_HIGH_1;
}
numSamples = WAVEDAC_CLOCK_HIGH_FREQ / freq;
}
voltage255 = voltage * (255.0 / 100.0);
currentWaveform = GetCurrentWaveform(fnGenerator);
if (currentWaveform != NULL) {
StopWaveDac(waveDacId);
SetWaveform(numSamples, mode, voltage255, currentWaveform);
StartWaveDac(numSamples, fnGenerator, currentWaveform);
return freq;
}
return -1;
}