[SOLVED] project in distress..

• Jan 29, 2013

• #41

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including I2C routines

 

• Jan 29, 2013

• #42

jayanth.devarayanadurga

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I don't have a flowchart software. I will try to write the flowchart in paint and post it later.

 

• Jan 29, 2013

• #43

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ok thank you in advance

 

• Feb 1, 2013

• #44

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RC2 is connected to a piezo buzzer , how do i turn on the buzzer to warn if the temperature is more than 27 ?

 

• Feb 1, 2013

• #45

jayanth.devarayanadurga

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Code:

 If(temp > 27) PORTCbits.RC2 = 1;

 

• Feb 1, 2013

• #46

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need to set the frequency to make the sound a continuos one

 

• Feb 1, 2013

• #47

jayanth.devarayanadurga

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You have to apply 5 V to the buzzer.

 

• Feb 1, 2013

• #48

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connect RC2 to 5V ?

 

• Feb 4, 2013

• #49

jayanth.devarayanadurga

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Show you circuit diagram.

 

• Feb 4, 2013

• #50

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oh i solved this buzzer issue already thanks

- - - Updated - - -

yup that is my final codes..

 

• Feb 4, 2013

• #51

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the urls links u gave cant open at all.
perhaps you can screenshot it and give it to me ?

 

• Feb 14, 2013

• #52

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hey jayanth , just a question of doubt .

why

Code:

WriteCmdXLCD(0xC0);

is start from line 2 .

and

Code:

WriteCmdXLCD(0x80);

is start from line 1.

How do you know ?

- - - Updated - - -

hey jayanth , just a question of doubt .

why

Code:

WriteCmdXLCD(0xC0);

is start from line 2 .

and

Code:

WriteCmdXLCD(0x80);

is start from line 1.

How do you know ?

 

• Feb 14, 2013

• #53

jayanth.devarayanadurga

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They are the address of 1st row 1st column and 2nd row and 2nd column. Google for HD44780 compatible datasheet and see the commands for different LCD operations.

 

Last edited: Feb 14, 2013

• Feb 15, 2013

• #54

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hi jayanth ,

Code:

if(LastTemp > 26)  //If the value of LastTemp is more than 26 but not inclusive of 26
		{
			PORTB = 0XFF;/*PORTB which is the LEDS(RBO,RB1,RB2,RB3) will light up
						   to give a warning to the user that the temperature is getting too warmed , 
						   even if i connect a Fan controller to the RB4,RB5,RB6 
						   or RB7 and the aboved conditons are met , the fan will turn on by itself 
						   without using a pushbutton*/  
		}
		else if (LastTemp <= 26) //If the value of LastTemp is less than and inclusive of 26
		{
				PORTB=0X00;/*PORTB which is the LEDS(RBO,RB1,RB2,RB3) will NOT light up , 
							 as the above conditions are met , LEDs will be off and 
							 Fan will be off as well*/	
		}

How can i modify this code to make the fan stop immediately once it hits 25 deg c and even if it hit 27 deg c it will not turn on but will wait for 10 seconds of clearance before turning on the fan?

Super urgent thanks

 

• Feb 15, 2013

• #55

jayanth.devarayanadurga

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---

Code C - [expand]
1
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if(LastTemp >= 25) {
         PORTB = 0x00;
}
else if(LastTemp  >= 27) {
             Delay_ms(10);
             PORTB = 0xFF;
}

---

 

• Mar 19, 2013

• #56

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Hey jayanth , I have got back my project results . Thanks to you , I scored very well...