Diff: main.cpp

Revision:

0:9bc294b44806

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Mar 04 04:57:26 2010 +0000
@@ -0,0 +1,38 @@
+#include "mbed.h"
+
+SPI spi(p11, p12, p13); // mosi, miso, sclk
+DigitalOut temp_cs(p8); // chip select
+DigitalOut led1(LED1); //debug led
+Serial pc(USBTX, USBRX); // tx, rx
+
+int main() {
+    float temp = 0;
+    temp_cs = 1;
+    
+    temp_cs = 0;
+    spi.format(8,3); //falling edge, clock idle high
+    spi.frequency(5000000);
+    spi.write(0x08); //write to config register
+    spi.write(0x10); //contin conversion mode
+    temp_cs = 1;
+
+    temp_cs = 0;
+    spi.write(0x54); //contin read mode
+    temp_cs = 1;
+
+    spi.format(16,3);
+    while (1) {
+        led1 = 0;
+        temp_cs = 0;
+        temp = spi.write(0x0000); //write 16 dummy bits to read 16 bits
+        temp_cs = 1;
+        if (temp<0)
+            temp = (temp -32768)/128; //negative temp calculation
+        else
+            temp = temp/128;//div by 128 16bit positive temp
+        led1 = 1;
+        pc.printf("Temperature = %1.6f \r", temp);  
+        wait(1);
+    }
+
+}
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