老 姚
sin Wave generation by AnalogOut
Diff: main.cpp
- Revision:
- 0:455b26cfa769
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Jun 22 23:12:17 2018 +0000
@@ -0,0 +1,24 @@
+#include "mbed.h"
+#include "iostream"
+DigitalOut myled(PF_14);
+AnalogOut aout(PA_4);
+
+const double pi = 3.141592653589793238462;
+const double amplitude = 0.5f;
+const double offset = 65535/2;
+using namespace std;
+int main() {
+ double rads = 0.0;
+ uint16_t sample = 0;
+ cout<<"hello\n";
+ printf("Analog Out demo\n");
+ while(1) {
+ // sinewave output
+ for (int i = 0; i < 360; i++) {
+ rads = (pi * i) / 180.0f;
+ sample = (uint16_t)(amplitude * (offset * (cos(rads + pi))) + offset);
+ aout.write_u16(sample);
+ }
+ }
+
+}