Josh Goldberg
/
count_pills
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Diff: util.cpp
- Revision:
- 0:15d3cdafd311
- Child:
- 1:9ebe670d8a19
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/util.cpp Thu Dec 11 21:54:03 2014 +0000
@@ -0,0 +1,34 @@
+#include "mbed.h"
+#include "util.h"
+
+uint16_t mvgAvg(uint16_t val, int reset) {
+ const uint32_t len = 25;
+ static uint16_t vals[len] = {0};
+ static uint32_t ind = 0;
+ static uint32_t full = 0;
+ static uint32_t sum = 0;
+
+ if (reset) {
+ ind = full = sum = 0;
+ return 0;
+ }
+ if (full) {
+ sum -= vals[ind];
+ }
+ sum += val;
+ vals[ind] = val;
+
+ ind++;
+ if (ind >= len) {
+ ind = 0;
+ full = 1;
+ }
+ if (full) {
+ return (uint16_t) (sum / len);
+ }
+ return (uint16_t) (sum / ind);
+}
+
+int round(float val) {
+ return val > 0 ? ((int) (val + 0.5)) : ((int) (val - 0.5));
+}