Diff: main.cpp

Revision:

0:248aa51eeb12

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Feb 28 20:05:48 2011 +0000
@@ -0,0 +1,59 @@
+#include "string.h"
+#include "mbed.h"
+#include "SDFileSystem.h"
+#include "PowerControl.h"
+#include "EthernetPowerControl.h"
+AnalogIn ain(p20);
+DigitalOut sensor(p15);
+Serial pc(p28, p27);
+SDFileSystem sd(p5, p6, p7, p8, "sd"); 
+#define USR_POWERDOWN    (0x104)
+
+int semihost_powerdown() {
+    uint32_t arg;
+    return __semihost(USR_POWERDOWN, &arg);
+}
+Ticker sense; // Ticker to Interrupt the sleeping mode
+Timer t;
+
+void sd_write_read() {
+    char data[100];
+    int time_stamp;
+    time_stamp=t.read();
+    sensor=1;   /* Power up Sensor only when necessary */
+    pc.printf("\n Writing into SD card... \n");
+    pc.printf("\n Writing Sensor Data... \n");
+    mkdir("/sd/mydir", 0777);
+    /* Following code does a conditional check on analog in to determine the distance from IR Sensor */
+    if (ain < 0.3) {
+        strcpy(data,"Its approximately 30 cm away");
+    } else if (ain > 0.3&&ain < 0.5) {
+        strcpy(data,"Its approximately 20 cm away");
+    } else if (ain>0.5 && ain < 0.6) {
+        strcpy(data,"Its approximately 15 cm away");
+    } else {
+        strcpy(data,"Its approximately 10 cm away");
+    }
+
+    /* Open the File for writing into the SD Card */
+    FILE *fp = fopen("/sd/mydir/sdtest.txt", "a");
+    if (fp == NULL) {
+        error("Could not open file for write\n");
+    }
+    fprintf(fp, "%d : %s \n",time_stamp,data);  /* Record Sensor data along with time stamp */
+    fclose(fp);
+    sensor=0;   /* Power down Sensor after data is logged */
+}
+
+int main() {
+    int result; 
+    PHY_PowerDown();                    /* PHY Powerdown */
+    result = semihost_powerdown();      /* Semihost Powerdown */
+    sense.attach(&sd_write_read, 5);    /* Excecute sd_write_read function every 5s */
+    t.start();                          /* Start of timer to record Time Stamp */
+    while (1) {
+        Sleep();                        /* Sleep mode to save power */
+    }
+}
+
+