Ian Wolf
Fork of
Temperature_Reading1
by 
jack kemnitz
Diff: main.cpp
- Revision:
- 0:1f9fae46bbe1
- Child:
- 1:1de97b1145f3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Aug 11 16:20:22 2017 +0000
@@ -0,0 +1,29 @@
+#include "mbed.h"
+
+// Read temperature from LM75BD
+
+I2C i2c(PB_9 , PB_8 );
+
+Serial pc (SERIAL_TX, SERIAL_RX);
+
+const int addr7bit = 0x48; // 7 bit I2C address
+const int addr8bit = 0x48 << 1; // 8bit I2C address, 0x90
+
+int main() {
+ pc.baud(250000);
+ char cmd[2];
+ while (1) {
+ cmd[0] = 0x01;
+ cmd[1] = 0x00;
+ i2c.write(addr8bit, cmd, 2);
+
+ wait(0.5);
+
+ cmd[0] = 0x00;
+ i2c.write(addr8bit, cmd, 1);
+ i2c.read( addr8bit, cmd, 2);
+
+ float tmp = (float((cmd[0]<<8)|cmd[1]) / 256.0);
+ printf("Temp = %.2f\r\n", tmp);
+ }
+}
\ No newline at end of file