Stijn Sontrop / Mbed 2 deprecated DS1624LCD

An example program that shows how to read a Maxim DS1624 temperature sensor via the I2C bus and print the results to a LCD.

Dependencies:   TextLCD mbed

Files at this revision

API Documentation at this revision

Revision 0:5ca9b9abcaf3, committed 2010-12-22

Comitter:
StijnS
Date:
Wed Dec 22 19:41:46 2010 +0000
Commit message:

Changed in this revision

TextLCD.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TextLCD.lib	Wed Dec 22 19:41:46 2010 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/simon/code/TextLCD/#44f34c09bd37

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Dec 22 19:41:46 2010 +0000
@@ -0,0 +1,64 @@
+/*********************************
+**Read DS1624 Temperature Sensor**
+******Made by Stijn Sontrop*******
+**********22 Dec 2010*************
+**********************************/
+
+#include "mbed.h"
+#include <TextLCD.h> //Include the TextLCD lib (add this one to your project)
+
+
+//Address of DS1642: 1001 A2 A1 A0 R/W'
+//Example: 0x92 = Sensor with address 1
+//Make R/W' 0
+#define DS1642WRITEADDR 0x92
+//Make R/W' 1
+#define DS1642READADDR 0x93
+
+TextLCD lcd(p15, p16, p17, p18, p19, p20); //LCD Config rs, e, d4-d7
+
+I2C i2c(p9, p10); //SDA & SCL from I2C
+typedef struct { //Struct that contains the MSB en LSB value
+    char msb;
+    char lsb;
+} temperature;
+
+//Function that reads the temperature
+temperature readDS1624(void) {
+    temperature readval;
+    i2c.start();
+    i2c.write(DS1642WRITEADDR); //address
+    i2c.write(0xEE); //start conv T
+    i2c.stop();
+    wait_ms(2);
+    
+    i2c.start();
+    i2c.write(DS1642WRITEADDR); //Address
+    i2c.write(0xAA); //read temp command
+    i2c.stop();
+    wait_ms(1);
+    
+    i2c.start();
+    i2c.write(DS1642READADDR); //Write Address
+    readval.msb = i2c.read(1); //Read MSB + ACK
+    readval.lsb = i2c.read(0); //Read LSB + No ACK
+    i2c.stop();
+    readval.msb = readval.msb - 2; //Apparently you need to do -2 to get the right value
+    return readval; //Return value
+}
+
+int main() {
+    temperature readval;
+    i2c.start();
+    i2c.write(DS1642WRITEADDR); //b1001 A2 A1 A0 R/W'
+    i2c.write(0xAC); //access config
+    i2c.write(0x00); //continuous conversion
+    i2c.stop();
+    
+    while (1) {
+        readval = readDS1624(); //Call the readDS162 function
+        lcd.cls(); //Clear LCD
+        lcd.printf("Temp: %d\n%d", readval.msb, readval.lsb); //Print values to LCD
+        wait(0.3);
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Dec 22 19:41:46 2010 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e