Marco Pellis
Oscilloscope 20Hz20kHZ Labview kl25z
Dependencies: ComparatorIn mbed
Revision 0:b04378e035d8, committed 2016-12-19
- Comitter:
- inuD
- Date:
- Mon Dec 19 18:47:36 2016 +0000
- Commit message:
- Oscilloscope 20hz-20khz LabView kl25z
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ComparatorIn.lib Mon Dec 19 18:47:36 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/frankvnk/code/ComparatorIn/#e6a4cd28e217
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Mon Dec 19 18:47:36 2016 +0000
@@ -0,0 +1,126 @@
+#include "mbed.h"
+#include "ComparatorIn.h"
+
+#define MAX_SAMPLERATE 50000
+#define Min_FREQ 20
+#define MAX_FREQ 20000
+#define MaxFrdmVAnalogRef 3.3
+#define ThresholdOut 1000
+
+Serial pc(USBTX,USBRX);
+
+double AutoTrig, ValTrig, RiseOrFall, nWave; // 1-0 for autotrig, value of trigger, on rise or fall of WaveFront
+double AutoSr, ValSr; // 1-0 for autoSampleRate (max Value), value of SampleRate
+double NumberSample, TranslationSample; // number of sample send to pc, first or last sample discard
+
+double Threshold = 0;
+double SampleRate = MAX_SAMPLERATE;
+double MaxFrdmVAnalog;
+
+int dimArr;
+int stopArray = -1;
+int startArray = -1;
+int numbWave = 1;
+double range;
+double BottomLimit;
+double TopLimit;
+double adcRead;
+
+
+AnalogIn DAC_In (PTB0);
+ComparatorIn COMP_In(PTC8, PTE30); // in+ = PTC8, in- = 12-bit DAC
+
+
+// Comparator callback functions
+void cmp_rise_ISR(void){
+ stopArray = stopArray + 1;
+ startArray = 0;
+ }
+
+void cmp_fall_ISR(void){
+ stopArray = stopArray + 1;
+ startArray = 0;
+ }
+
+void Setting(double autoSr, double valSr, double autoTrig, double valTrig, double riseOrFall){
+ if (autoSr == 1){
+ SampleRate = MAX_SAMPLERATE;
+ }
+
+ else{
+ SampleRate = valSr;
+ }
+
+ Threshold = (valTrig * MaxFrdmVAnalog) - BottomLimit; //Value Trigger desired / Max Input
+ //all /MaxFrdmVAnalogRef
+ //Threshold = (valTrig / MaxFrdmVAnalog) + BottomLimit;
+
+ if (autoTrig == 1){
+
+ COMP_In.treshold(Threshold); //Set Threshold
+
+ if (riseOrFall == 0){
+ COMP_In.rising(cmp_rise_ISR); // Set pointer to rising interrupt functio
+ }
+ else {
+ COMP_In.falling(cmp_fall_ISR); // Set pointer to falling interrupt function
+ }
+ }
+ else{
+ COMP_In.treshold(ThresholdOut);
+ }
+ }
+
+void printWave(int dimarr, int sampleRate, int numberSample, int translationSample){
+
+ double dataLab[dimarr];
+ for (int i = 0; i < dimarr; i++){ // fare if di variabile - su callback function
+
+ adcRead = (DAC_In / MaxFrdmVAnalog) + BottomLimit; //all *MaxFrdmVAnalogRef?
+ dataLab[i] = adcRead;
+
+ double SR = sampleRate;
+ wait(1 / SR);
+ }
+
+ int dimarray = dimarr - numberSample;
+ int startarray = dimarray*translationSample/10;
+
+ for(int j = startarray; j< dimarr - dimarray; j++){
+ printf("%f ", dataLab[j]);
+ }
+
+ }
+
+
+int main() {
+
+ if (MAX_SAMPLERATE < 2*MAX_FREQ)
+ {
+ printf("Error SampleRate");
+ }
+
+ while(1) {
+ // there are some parameters only for Labview
+ pc.scanf("%f,%f,%f,%f,%f,%f,%f,%f,%f", &AutoTrig, &ValTrig, &nWave , &RiseOrFall, &AutoSr, &ValSr, &NumberSample, &TranslationSample, &TopLimit, &BottomLimit);
+ double DimensionArray = (SampleRate / Min_FREQ) * 2; //at least 2 waveform of the minimum Frequ
+ dimArr = int (DimensionArray);
+ //numbWave = int (nWave);
+
+ range = TopLimit - BottomLimit;
+ MaxFrdmVAnalog = MaxFrdmVAnalogRef / range;
+
+ Setting(AutoSr, ValSr, AutoTrig, ValTrig, RiseOrFall); //testing - setting every some sec(contator intern)
+ if (AutoTrig == 1){
+ if (startArray == 0 && stopArray == 0){
+ printWave(dimArr, SampleRate, NumberSample, TranslationSample);
+ startArray = -1;
+ stopArray = -1;
+ }
+ }
+ else{
+ printWave(dimArr, SampleRate, NumberSample, TranslationSample);
+ }
+ }
+ }
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon Dec 19 18:47:36 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/d75b3fe1f5cb \ No newline at end of file