Domenico Vitale
LEZIONE 10. Scrivere, in ambiente mbed, il codice di una applicazione che: • Effettui una conversione A/D ad un rate di 200 Hz; • Alla pressione di un tasto calcoli il valore min e max degli ultimi 100 campioni e li invii sul monitor seriale; • Ogni 2 sec. invii tramite monitor seriale la temperatura interna del micro.
Revision 0:a835fa07c700, committed 2022-01-18
- Comitter:
- domemort
- Date:
- Tue Jan 18 17:17:22 2022 +0000
- Commit message:
- .
Changed in this revision
diff -r 000000000000 -r a835fa07c700 .gitignore --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.gitignore Tue Jan 18 17:17:22 2022 +0000 @@ -0,0 +1,4 @@ +.build +.mbed +projectfiles +*.py*
diff -r 000000000000 -r a835fa07c700 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Jan 18 17:17:22 2022 +0000
@@ -0,0 +1,91 @@
+#include "mbed.h"
+#include "platform/mbed_thread.h"
+#include "platform/CircularBuffer.h"
+
+AnalogIn ain(A0);
+BufferedSerial pc(USBTX, USBRX, 115200);
+Ticker conv;
+Thread t(osPriorityBelowNormal, 16 * 1024);
+EventQueue coda;
+CircularBuffer<uint16_t, 100> buffer;
+uint16_t ADC_data;
+uint16_t frame_start=0xBBAA;
+uint16_t* ptr1;
+bool flag;
+
+InterruptIn bottone(PC_13);
+Mutex serial;
+
+Ticker temp;
+AnalogIn adc_temp(ADC_TEMP);
+
+
+void read_A0 (void);
+void fun (void);
+void ISR (void);
+void read_temp (void);
+void fun2 (void);
+
+int main()
+{
+ printf("Mbed OS version %d.%d.%d.\r\n", MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION);
+ ptr1 = &frame_start;
+ t.start(callback(&coda, &EventQueue::dispatch_forever));
+ conv.attach(&read_A0, 5ms);
+ bottone.rise(&ISR);
+ temp.attach(&read_temp, 2s);
+ while(1) {
+ if(flag) {
+ ADC_data = ain.read_u16()>>4;
+ buffer.push(ADC_data);
+ flag = false;
+ ThisThread::sleep_for(4ms);
+ }
+ }
+}
+
+void read_A0 (void)
+{
+ flag = true;
+}
+
+void ISR (void)
+{
+ coda.call(&fun);
+}
+
+void read_temp (void)
+{
+ coda.call(&fun2);
+}
+
+void fun (void)
+{
+ uint16_t vettore[100];
+ uint16_t massimo;
+ uint16_t minimo;
+
+ buffer.pop(vettore);
+ for (int i=0; i<99; i++) {
+ massimo = vettore[0];
+ if (vettore[i]>massimo) {
+ massimo = vettore[i];
+ }
+ minimo = vettore[0];
+ if (vettore[i]<minimo) {
+ minimo = vettore[i];
+ }
+ }
+ float massimo2 = massimo*3.3/4096;
+ float minimo2 = minimo*3.3/4096;
+ serial.lock();
+ printf("massimo = %1.3f,\t minimo = %1.3f\n\r" , massimo2, minimo2);
+ serial.unlock();
+}
+
+void fun2(void){
+ float tempp = adc_temp.read()*100;
+ serial.lock();
+ printf("Il valore di temperatura e': %1.3f\n\r" , tempp);
+ serial.unlock();
+}
\ No newline at end of file
diff -r 000000000000 -r a835fa07c700 mbed-os.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Tue Jan 18 17:17:22 2022 +0000 @@ -0,0 +1,1 @@ +https://github.com/ARMmbed/mbed-os/#4cfbea43cabe86bc3ed7a5287cd464be7a218938
diff -r 000000000000 -r a835fa07c700 mbed_app.json
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_app.json Tue Jan 18 17:17:22 2022 +0000
@@ -0,0 +1,8 @@
+{
+ "target_overrides": {
+ "*": {
+ "target.printf_lib": "std"
+ }
+
+ }
+}