Diff: main.cpp

Revision:

0:7cbf615a0467

Child:

1:8d7984b2e2bc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Apr 11 15:49:47 2015 +0000
@@ -0,0 +1,77 @@
+#include "mbed.h"
+#include "SB1602E.h"
+#include "BME280.h"
+#include "SDFileSystem.h"
+
+#define USE_SDCARD  1
+#define USE_RTC     0
+
+#if USE_SDCARD
+DigitalOut sd_sdo(dp18, 0);
+DigitalOut sd_csb(dp15, 1);
+DigitalOut sd_gnd(dp12, 0);
+SDFileSystem sd(dp24, dp22, dp23, dp25, "sd"); // mosi, miso, sclk, cs
+#endif
+
+SB1602E lcd(dp11, dp10);
+DigitalIn btn(dp2);
+BME280 sensor(dp16, dp17);
+
+
+int main()
+{
+    float temp, humd, pres;
+    lcd.setCharsInLine(8);
+    lcd.contrast(0x30);
+    int last_mode = 0;
+    btn.mode(PullUp);
+
+    lcd.printf(0, 0, "BME280");
+    lcd.printf(0, 1, "Demo");
+    wait(3);
+
+#if USE_SDCARD
+    uint32_t count = 0;
+    mkdir("/sd/environmental", 0777);
+    FILE *fp = fopen("/sd/environmental/log.csv", "w");
+    if(fp == NULL) {
+        error("Could not open file for write\n");
+    }
+    fprintf(fp, "Temerature,Humidity,Pressure\r\n");
+#endif
+
+    while(1) {
+        temp = sensor.getTemperature();
+        humd = sensor.getHumidity();
+        pres = sensor.getPressure();
+        if (btn == 1) {
+            if (last_mode == 0) {
+                lcd.clear();
+            }
+            lcd.printf(0, 0, "%2.2f%cC", temp, 0xdf);
+            lcd.printf(0, 1, "%2.2f%%", humd);
+            last_mode = 1;
+        } else {
+            if (last_mode == 1) {
+                lcd.clear();
+            }
+            lcd.printf(0, 0, "%2.2f%cC", temp, 0xdf);
+            lcd.printf(0, 1, "%04.1fhPa", pres);
+            last_mode = 0;
+        }
+#if USE_SDCARD
+        count++;
+        if ((count % 60) == 0) {
+            fprintf(fp, "%2.2f,%2.2f,%4.1f\r\n", temp, humd, pres);
+            fflush(fp);
+            count = 0;
+        }
+#endif
+        wait(1);
+    }
+
+#if USE_SDCARD
+    fclose(fp);
+    delete fp;
+#endif
+}