Diff: main.cpp

Revision:

0:14d1482ba244

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Nov 02 06:16:16 2021 +0000
@@ -0,0 +1,35 @@
+#include "mbed.h"
+
+AnalogIn cds(A0);                           // Analog input at PA0
+DigitalOut led(D10);                        // Led contolled by D10
+
+uint32_t measLight(int nmeas)
+{
+    uint32_t sum0, sum1, diff;
+    led = 0;
+    sum0 = 0;
+    for (int i = 0; i < nmeas; i++) {
+        sum0 += cds.read_u16();
+    }
+    led = 1;
+    sum1 = 0;
+    for (int i = 0; i < nmeas; i++) {
+        sum1 += cds.read_u16();
+    }
+    if (sum0 > sum1) {
+        diff= 0;
+    } else {
+        diff = (sum1 - sum0) / nmeas;
+    }
+    printf("L1: %5d  L0: %5d  Diff: %5d\r\n",sum1/nmeas, sum0/nmeas, diff);
+    return diff;
+}
+
+int main()
+{
+    printf("\r\n Lab03_light_sensor - with averaging\r\n");
+    while(1) {
+        measLight(1000);
+        wait(2);
+    }
+}
\ No newline at end of file