dorian diana
ER2
Diff: main.cpp
- Revision:
- 0:a6e925f144a4
diff -r 000000000000 -r a6e925f144a4 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Jun 02 07:24:41 2021 +0000
@@ -0,0 +1,40 @@
+#include "mbed.h"
+AnalogOut trig(p16);
+InterruptIn Echo(p15);
+Timer T1;
+Ticker T2;
+void Trig(void);
+void FM(void);
+void FD(void);
+float temp;
+int main()
+{
+ T2.attach(&Trig,1);
+ float dis;
+ Echo.rise(&FM);
+ Echo.fall(&FD);
+ while(1) {
+ dis =17/(100*temp);
+ printf("cm=%g\n\r",dis);
+
+
+ }
+}
+
+void Trig(void)
+{
+ trig=1;
+ wait_us(50);
+ trig=0;
+}
+void FM(void)
+{
+ T1.stop();
+ T1.reset();
+ T1.start();
+}
+void FD(void)
+{
+ T1.stop();
+ temp=T1.read();
+}
\ No newline at end of file