TO TURN ON THE LED USING LPC2148

By -

SIMULATOR: PROTEUS 8.0

SOFTWARE: KEIL 

CIRCUIT DIAGRAM:


WORKING:

This project is about turning on the led connected to P0.0 pin of lpc 2148.In this project,LED is connected in current sinking arrangement.

Whenever logic 0 is provided to P0.0 pin of lpc 2148, LED get turned ON.As in this project current sinking arrangement is used hence logic 0 is provided to turn on the led.

PROGRAM:

#include<LPC214x.h>      // Header file of LPC2148
int main()
IODIR0=0x00000001;// select p0.1 as an output pin
PINSEL0=0x00000000; // select gpio function of p0.1
while(1)   // continuous loop
{
IOCLR0 = 0x00000001;//turn on the led
}
}

PROGRAM DESCRIPTION:

Here,using IODIR register p0.0 pin is set as an output pin.PINSEL0 register is used to select the GPIO(General purpose input/output pin) function of the pin.
Using IOCLR register logic 0 is provided to port 0.0 pin.While loop is used for the continuous process.

VIDEO:

 

 


Note:

Please refer below article to know more about IODIR and PINSEL register and how to configure the pins in input and output mode?
https://embeddedprojects222.blogspot.com/2021/05/how-to-select-direction-of-port-as.html

Comments

Post a Comment

Popular posts from this blog

Digital Thermometer using 8051 and ADC 0808 Interfacing With 8051

By -
Image
SOFTWARE: KEIL MICRO VISION 4 SIMULATOR: PROTEUS 8.0 CIRCUIT DIAGRAM: WORKING: Here,Temperature is taken from LM35 temperature sensor.LM35 converts surrounding temperature into analog voltage(equivalent to temperature).This analog voltage is provided to ADC0808 for digital conversion. After digital conversion,final temperature get displayed on LCD display. LCD(16X2) DISPLAY: RS,RW,EN pins are connected to P2.5 to P2.7 of 8051 respectively. Data pins (D0 to D7) are connected to P3.0 to P3.7 of 8051 respectively. LM35 SENSOR: VCC pin is connected to 5 v supply. VOUT pin is connected to IN0 channel of ADC 0808. On the VOUT pin we get equivalent voltage with respect to the surrounding  temperature. Temperature change is 10 mv/°c. GND pin is connected to GND. ADC 0808: VCC pin is connected to 5 v supply. VREF(+) pin is connected to 2.56V supply. VREF(-) pin is connected to GND. OUT8(LSB) to OUT1(MSB) pins are connected to P1.0(LSB) to P1.7(MSB) respectively.i.e. OUT8 pin is connected to P1.
Read more

how to display numbers on lcd?

By -
Image
In this article I have written about how number get displayed on lcd. Lcd only displays character ranging from '0' to '9' ( in terms of numbers). So the question is how to display numbers which are greater than 9 ? If we want to display any number which is  greater  than 9 on an lcd then decompose(break) the number and add 48 to each separated digit of that number and send the resulting value one by one to the lcd. Here I have taken four digit number as an example. Suppose I want to display 1352 on lcd. First basic step is initialization  of lcd. Please refer my article about lcd display interfacing with 8051  to know lcd display interfacing. ( http://embeddedprojects222.blogspot.com/2020/07/lcd-interfacing-using-8051-micro.html ). Then the next step is decompose(break) the number. Procedure to decompose(break) 4 digit number: 1.First divide the number by 1000.So we get first number.  Ex.1352/1000=1; 2.Divide the number by 1000 and take the remainder of the             
Read more

Introduction of IODIR,PINSEL,IOSET and IOCLR Registers

By -
Image
How to select the direction of the port? IODIR is the command used to set the direction of the port as an input or an output. For setting the pin as an input pin we need to provide logic 0 and for setting the pin as an output pin we need to provide logic 1 to the respective pin. By default, on reset, all the pins are acting as an input so there is no need to set the pin as an input pin if we are resetting the arm7. But for setting the pin as an output pin we need to provide logic 0. Let's take the below example:   Supposed I want to set pin 3 of port 0 as an output then I will provide logic 1 to pin 3 of port 0. IODIR0: IODIR0 = 0x00000008 Supposed I want to set pin 16, pin 15, pin 2 and pin 1 of port 1 as an output then I will change the bits as follows: IODIR0 = 0x00018006; How to select the pin for a particular function? In arm7 each pin has multiple functions, to select the particular function of the respective pin  PINSEL  register is used. To select the particular function in
Read more