Revision 0:9fd28909b48d, committed 2014-04-28

Comitter:

yihui

Date:

Mon Apr 28 01:11:23 2014 +0000

Commit message:

initial

Changed in this revision

diff -r 000000000000 -r 9fd28909b48d DigitDisplay.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DigitDisplay.lib	Mon Apr 28 01:11:23 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/seeed/code/DigitDisplay/#d3173c8bfd48

diff -r 000000000000 -r 9fd28909b48d main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Apr 28 01:11:23 2014 +0000
@@ -0,0 +1,25 @@
+#include "mbed.h"
+#include "DigitDisplay.h"
+
+DigitDisplay display(P1_14, P1_13); // 4-Digit Display connected to UART Grove connector
+AnalogIn thermistor(P0_12);         // Thermistor output connected to P0_12
+
+int main() {
+    unsigned int a;
+    unsigned int beta = 3975;
+    float temperature, resistance;
+ 
+    while(1) {
+        a = thermistor.read_u16(); /* Read analog value */
+        
+        /* Calculate the resistance of the thermistor from analog votage read. */
+        resistance= (float) 10000.0 * ((65536.0 / a) - 1.0);
+        
+        /* Convert the resistance to temperature using Steinhart's Hart equation */
+        temperature = (1/((log(resistance/10000.0)/beta) + (1.0/298.15)))-273.15; 
+        
+        display = (int)temperature;
+      
+        wait(0.5);
+    }
+}

diff -r 000000000000 -r 9fd28909b48d mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Mon Apr 28 01:11:23 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/8e73be2a2ac1
\ No newline at end of file