sensor interfacing with lpc2148 arm7 tyro

Posted on Feb 6, 2014

The LM35 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. The output of sensor converted to digital that easy connecting with microcontroller. Fig. 1 shows how to interface the LM35 to microcontroller. As you can see the third pin is connected to GND,

sensor interfacing with lpc2148 arm7 tyro

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the first pin is connected to VCC & the second pin is connected to the Microcontroller input. Just use single PIN female to female wire to connect with the leads of LM35 temperature sensor. So when the temperature is sensing, it give the sensor reading to controller. Read the temperature in LPC2148 Tyro Board from temperature sensor LM35. The ARM7 LPC2148 Tyro board uses the ADC pin for reading temperature from temperature sensor LM35. The reading output is displayed into PC through UART1. The 10 bit ADC used for reading the temperature from LM35. Basic clocking for the A/D converters is provided by the VPB clock. A programmable divider is included in each converter, to scale this clock to the 4. 5 MHz (max) clock needed by the successive approximation process. A fully accurate conversion requires 11 of these clocks. To compile the above C code you need the KEIL software. They must be properly set up and a project with correct settings must be created in order to compile the code. To compile the above code, Temp Sens. c file must be added to the project. In Keil, you want to develop or debug the project without any hardware setup. You must compile the code for generating HEX file. In debugging Mode, you want to check the port output without microcontroller Board. Give +3. 3V power supply to LPC2148 Tyro Board; the serial cable is connected between the controller and PC. Open the Hyper Terminal screen, select which port you...

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