programm for displaying temperature on lcd using PIC24F

[vinay shabad]

hii guys i am very new to PIC microcontroller, i want to read temperature from temperature sensors and display it on lcd.It would be very helpfull if you suggest me how can i proceed it nd if u have any code please help me.

 

[horace1]

do you already have a development board or are you planning to build your own system?
for example, the Microchip Explorer 16
**broken link removed**

has a LCD display and a temperature sensor

 

[vinay shabad]

do you already have a development board or are you planning to build your own system?
for example, the Microchip Explorer 16
**broken link removed**

has a LCD display and a temperature sensor

yes board is ready now i need to writed a programme for it

 

[horace1]

what are the devices (version number) and how are they connected (digital IO pins, SPI, I2C, etc)

 

[DineshSL]

Hi vinay shabad,

To begin, use LM35 temperature sensor, it's the most common and easy to use temperature sensor.

You can see nice project with LM35 & a PIC here,
12F675 tutorial 4: Making an LM35 temperature recorder.
LM35 with 16F876A;
Welcome to Cytron Technologies - Robot . Head to Toe : PIC Training Malaysia, PIC Microcontroller

---------- Post added at 18:39 ---------- Previous post was at 18:34 ----------

since you new to uC, don't try with PIC24F. First try with 8bit uC which has relatively simpler structure. For PIC most people begin with PIC16F series.

 

[vinay shabad]

i am using PIC24F16KA102 with ADC 10 BITS can you suggest me how can i start code for reading temperature from sensor and display on lcd

 

[horace1]

for a start read section 22.0 of the PIC24F16KA102 manual
https://ww1.microchip.com/downloads/en/DeviceDoc/PIC24F16KA102_Family_datasheet_39927b.pdf

to give you some ideas here is some example code for reading ADC channel 1 on a PIC24FJ256GB110

    AD1CON1=0;			         // clear config
    AD1CHS = 1;			         // setup ADC channel
    AD1PCFGLbits.PCFG1 = 0;          //Disable digital input on AN1
    AD1CSSL = 0;		                //No scanned inputs
    AD1CON1 = 0x0E4;		        //auto sample start, auto-convert
    AD1CON2 = 0;		                //AVdd, AVss, int every conversion, MUXA only
    AD1CON3 = 0x1F05;		        //31 Tad auto-sample, Tad = 5*Tcy
    AD1CON1bits.ADON=1;		 // switch ON ADC
    while(!AD1CON1bits.DONE);        // Wait for conversion to complete
    int adc=ADC1BUF0;		        // read ADC value

once you can read the temperature you can then look at displying on the LCD

as an alternative you can use functions from the Microchip header file <adc.h>
this is Microchip example code for a PIC24HJ64GP502 on a microstick development board

#include<adc.h>	//utilize adc peripheral library

void initAdc1(void)
{

	//Using the adc peripheral library, configure ADC1 as follows:
		// 12-bit
		// sample off of AN0
		// Use dedicated ADC RC oscillator
		// Automatically start new conversion after previous
		// Use Avdd and Avss as reference levels

	OpenADC1(
				ADC_MODULE_OFF & ADC_AD12B_12BIT & ADC_FORMAT_INTG & ADC_CLK_AUTO & ADC_AUTO_SAMPLING_ON,
				ADC_VREF_AVDD_AVSS & ADC_SCAN_OFF,
				ADC_SAMPLE_TIME_31 & ADC_CONV_CLK_INTERNAL_RC,
				ADC_DMA_BUF_LOC_1,
				ENABLE_AN0_ANA,
				ENABLE_ALL_DIG_16_31,
				0,
				0);

	AD1CON1bits.ADON = 1;	//Turn on ADC
}

void calc_Vout(void)
{

	//Using a 5Vdd and the ADC in 12-bit mode, gives us a 3.3/4096 = around 806uV/step
	Vout = ReadADC1(0)*0.0008056640625;

}

 

[etf988]

hello guys... I have the same problem, I need to read temperature from temperature sensor and display it on lcd. I am using Explorer 16, and I use 24fj128GA010 microcontroller... I have to solve this using Simulink. Simulink library is Embedded target for Microchip dsPIC Lubin Kerhuel's Website - Simulink - Embedded Target for PIC - Lubin KERHUEL's personnal website

Please help!

 

[horace1]

this code is for the Explorer 16 with a PIC24FJ256GB110

// LCD display ports etc
#define LCDdata LATE					// data port
#define LCDdataEnable	TRISE
#define RS LATBbits.LATB15				// RS bit in LCDstatus
#define RW LATDbits.LATD5				// read/write bit in LCDstatus
#define E  LATDbits.LATD4   			// enable bit in LCDstatus
#define Eenable TRISDbits.TRISD4
#define ERSenable TRISDbits.TRISD5
#define RWenable TRISBbits.TRISB15

void lcd_delay() { mSecDelay(2); }  // if LCD does not work make this longer

// Write a nibble to the LCD
// may have to adjust delays to suit the processor and clock
void lcdNibble(int n)
{
    int lcd=LCDdata;
	lcd_delay();
    LCDdata=n;
	lcd_delay();
    E=1;					// take clock E high 
	lcd_delay();
    E=0;
	lcd_delay();
 }

// Write a Control Command to the LCD
// This is written as two nibbles
void lcdCmd(int c)
{
 	RS=0;			        // Take RS pin low for command
	lcdNibble(c);			        // Makeup Lower Nibble
}

// write a data byte to LCD
int lcdPutchar(int d)
{
//    printf("%c", d);
	RS=1; 				// Take RS pin high for data
	lcdNibble(d);		            // Makeup Lower Nibble
    return 1;
}

// Initialise the LCD in 4bit Mode
void lcdInit()
{
	E=0;				// take E low
 	RS=0;				// Take RS pin low for command
 	RW=0;				// Take RS pin low for command
    // set RS, RW and E bits as output
	Eenable =0;
	ERSenable =0;
	RWenable =0;
    LCDdataEnable &= 0x0;          // set bits 0-3 output for data
	lcdNibble(0x3);		// This put the LCD into Soft Reset 
	lcdNibble(0x3);
	lcdNibble(0x3);
	lcdNibble(0x2);
	lcd_delay();
//	lcdCmd(0x28);			// 2 line, 4 bit mode 
	lcdCmd(0x38);			// 2 line, 8 bit mode 
	lcd_delay();
    lcdCmd(0x6);			// increment cursor after each write
	lcd_delay();
    lcdCmd(0x1);			// clear display
	lcd_delay();
    lcdCmd(0x2);			// home
	lcd_delay();
    lcdCmd(0xF);			// turn disply on
	lcd_delay();
}

should work with other PIC24 but you may have to change the delays

 

[etf988]

thanks a lot... but actually, i need this done in Simulink, using block diagram.. so I am not sure that this is helpfull in my situation..