Diff: main.cpp

Revision:

0:bf84ee4ea1d2

Child:

1:89aa667d1a9b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri May 13 09:21:10 2016 +0000
@@ -0,0 +1,37 @@
+#include "mbed.h"
+
+AnalogIn in(A0);
+
+#if !DEVICE_ANALOGOUT
+#error You cannot use this example as the AnalogOut is not supported on this device.
+#else
+AnalogOut out(PA_4);
+#endif
+
+DigitalOut led(LED1);
+
+int main()
+{
+    printf("\nAnalog loop example\n");
+    printf("*** Connect A0 and PA_4 pins together ***\n");
+    while(1) {
+        for (float out_value = 0.0f; out_value < 1.1f; out_value += 0.1f) {
+            // Output value using DAC
+            out.write(out_value);
+            wait(0.1);
+            // Read ADC input
+            float in_value = in.read();
+            // Display difference between two values
+            float diff = fabs(out_value - in_value);
+            printf("(out:%.4f) - (in:%.4f) = (%.4f) ", out_value, in_value, diff);
+            if (diff > 0.05f) {
+                printf("FAIL\n");
+            } else {
+                printf("OK\n");
+                printf("\033[1A"); // Moves cursor up of 1 line
+            }
+            led = !led;
+        }
+    }
+}
+