Diff: main.cpp

Revision:

0:27d9dfbfd60c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue May 31 22:56:35 2016 +0000
@@ -0,0 +1,50 @@
+#include "mbed.h"
+
+DigitalOut leds[] = {(LED1), (LED2), (LED3), (LED4) };
+AnalogIn photo(p19);
+DigitalIn button(p16);
+Serial pc(USBTX, USBRX);
+LocalFileSystem local("local");
+Timer timer;
+
+FILE* fp = NULL;
+char filename[256];
+
+int n_leds, i, saving, filecount = 0;
+float voltage;
+
+int main (void) {
+    timer.start();
+    while(true) {
+        voltage = 3.3*photo;
+        n_leds = (int)(4*(voltage - 2.0));
+        
+        for (i=0; i<4; i++) {
+            leds[i] = (i < n_leds) ? 1 : 0;
+        }
+        
+        saving = button ? 1 : 0;
+        
+        printf("%f %d %d\r\n", voltage, n_leds, saving);
+        
+        if (saving) {
+            if (fp == NULL) {
+                sprintf(filename,"/local/%d.txt",timer.read_ms());
+                fp = fopen(filename,"w");
+            } else {
+                fprintf(fp, "%f\r\n", voltage);
+            }
+        } else {
+            if (fp != NULL) {
+                fclose(fp);
+                fp = NULL;
+                filecount++;
+            }
+        }
+        
+        if (filecount >= 3) {
+            exit(0);
+        }
+        wait(0.1);
+    }
+}
\ No newline at end of file