lcd menu

dawson · Oct 24, 2009

that is all the code so far as I have not tried to combine it with my other code yet because I am just trying the menu on its own, I can post the other code if that is what you mean?

I have 3 switches atm wanting to use 4th as a cancel button

menu/enter - RA2
up - RA3
down - RA4

AtomSoft · Oct 24, 2009

ok .. so you have LCD code to show data on lcd already? Like normal text?

Ok um... in code the buttons are lined up like

PORTA = BINARY 0000-0000

Pressing:
RA2 would result in : 0000-0100
RA3 would result in : 0000-1000
RA4 would result in : 0001-0000

This means we have to change the code to accommodate using the upper byte as well...

um.... something like...

Code:

#define KeyPORT ((PORTA>>2)&0x0F)

This way if PORTA = 0000-0100 (aka RA2 pressed)
it will come up as 0000-0001 since we right shift 2 times

AtomSoft · Oct 24, 2009

Can you post your LCD code please,,, especially Lcd_Out

dawson · Oct 24, 2009

Yes I already have lcd working wih normal text.

Here is how i think it should be implemented with my ds1820 code:

Code:

#define KeyPORT ((PORTB>>2)&0x0F)
#define KeyDIR  TRISB

#define ENTER 2
#define UP    3
#define DOWN  4

#define LCD_LINE
#define LCD_DATA
#define LCD_STR
// LCD connections definitions
sbit LCD_RS at RA0_bit;
sbit LCD_EN at RA1_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;
sbit LCD_RS_Direction at TRISA0_bit;
sbit LCD_EN_Direction at TRISA1_bit;
sbit LCD_D4_Direction at TRISB0_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
// End LCD connections definitions
 unsigned rom char MainMenuLIST[2][16] = {
{"Option 1"},
{"Option 2"}
};

unsigned char WaitForInput(void){
	unsigned char temp1;	//TEMP DATA HOLDER
	unsigned char done = 0; //DONE Var will determine if done

	while(!done){				  //while done == 0
		if(KeyPORT>0){			  //if KeyPORT aka PORTB&0x0F.. the &0x0f will make sure we
						  //return the lower part of port only RB0 to RB3
			temp1 = KeyPORT;	  //Place the lower part of port into temp variable
			while(KeyPORT==temp1);    //Like a debounce for button press
			done = 0xFF;		  //Set DONE Var so we know we are complete
		}
	}
	return temp1;				  //Return our temp1 var
}
// String array to store temperature value to display
char *temp = "000.00";

// Temperature Resolution : No. of bits in temp value = 9
const unsigned short TEMP_RES = 9;

// Variable to store temperature register value
unsigned temp_value;

void Display_Temperature(unsigned int temp2write) {
  const unsigned short RES_SHIFT = TEMP_RES - 8;

  // Variable to store Integer value of temperature
  char temp_whole;

  // Variable to store Fraction value of temperature
  unsigned int temp_fraction;

  // check if temperature is negative
  if (temp2write & 0x8000) {
     temp[0] = '-';
     // Negative temp values are stored in 2's complement form
     temp2write = ~temp2write + 1;
     }

  // Get temp_whole by dividing by 2 (DS1820 9-bit resolution with
  // 0.5 Centigrade step )
  temp_whole = temp2write >> RES_SHIFT ;

  // convert temp_whole to characters
  if (temp_whole/100)
  // 48 is the decimal character code value for displaying 0 on LCD
     temp[0] = temp_whole/100  + 48;
  else
     temp[0] = '0';

  temp[1] = (temp_whole/10)%10 + 48;             // Extract tens digit
  temp[2] =  temp_whole%10     + 48;             // Extract ones digit

  // extract temp_fraction and convert it to unsigned int
  temp_fraction  = temp2write << (4-RES_SHIFT);
  temp_fraction &= 0x000F;
  temp_fraction *= 625;

  // convert temp_fraction to characters
  temp[4] =  temp_fraction/1000    + 48;         // Extract tens digit
  temp[5] = (temp_fraction/100)%10 + 48;         // Extract ones digit

  // print temperature on LCD
  Lcd_Out(2, 5, temp);
}
unsigned int digit;

void read_temp() {
   //--- perform temperature reading
    Ow_Reset(&PORTB, 5);      // Onewire reset signal
    Ow_Write(&PORTB, 5, 0xCC);   // Issue command SKIP_ROM
    Ow_Write(&PORTB, 5, 0x44);   // Issue command CONVERT_T
    Delay_ms(600);
    // If this delay is less than 500ms, you will see the first reading on LCD
    //85C which is (if you remember from my article on DS1820)
    //a power-on-reset value.

    Ow_Reset(&PORTB, 5);
    Ow_Write(&PORTB, 5, 0xCC);    // Issue command SKIP_ROM
    Ow_Write(&PORTB, 5, 0xBE);    // Issue command READ_SCRATCHPAD

    // Read Byte 0 from Scratchpad
    temp_value =  Ow_Read(&PORTB, 5);
    // Then read Byte 1 from Scratchpad and shift 8 bit left and add the Byte 0
    temp_value = (Ow_Read(&PORTB, 5) << 8) + temp_value;

    //--- Format and display result on Lcd
    Display_Temperature(temp_value);
}

void MainMenu(void){
unsigned char POS = 0; 	//Used for cursor ONLY!
unsigned char done = 0;
unsigned char x;
unsigned char ITEM=0;

Lcd_Cmd(_LCD_CLEAR);

while(!done){
	for(x=0;x<2;x++){
        LCD_LINE(x+1);

		if(x == POS)
			LCD_DATA('>',1);
		else
			LCD_DATA(' ',1);

        LCD_STR(MainMenuLIST[x]);
	}

	switch(WaitForInput()){
		case UP:
			if(POS>0){
				POS--;
				ITEM--;
			}
			break;
		case DOWN:
			if(POS<1){
				POS++;
				ITEM++;
			}
			break;
		case ENTER:
			done = 0xFF;
			break;
	}
}
	// ITEM contains what item is selected
	// POS isnt used incase larger then 2 menu...

	switch(ITEM){
		case 0:
			//Code to toggle C or F
			break;
		case 1:
			//Code to jump to new menu system
			break;
	}

	//Bring our title back.. cuz we are done with the menu...
    LCD_LINE(1);
    LCD_STR((unsigned rom char*)"  AtomSoftTech  ");

}

void main() {
  CMCON  |= 7;                       // Disable Comparators
  Lcd_Init();                                    // Initialize LCD
  Lcd_Cmd(_LCD_CLEAR);                           // Clear LCD
  Lcd_Cmd(_LCD_CURSOR_OFF);                      // Turn cursor off
  Lcd_Out(1,5,message1);             // Write message1 in 1st row
  Lcd_Out(2,4,message2);             // Write message1 in 2nd row
  Delay_ms(2000);
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Out(1, 3, "Temperature:   ");
  // Print degree character, 'C' for Centigrades
  Lcd_Chr(2,11,223);
 // different LCD displays have different char code for degree
 // if you see greek alpha letter try typing 178 instead of 223

  Lcd_Chr(2,12,'C');
  digit = 0;
  //--- main loop
  do {
    if(Button(&PORTA,2, 1, 0)) {
             MainMenu();
             }
    else {
            read_temp();
          }
    } while (1);
}

I know that the MainMenu items will not display anything this way but before I get that far I get an error when compilieing because of the array. I am using microc compiler

dawson · Oct 24, 2009

lcd_out() must be in the libraries on mikroc?

AtomSoft · Oct 24, 2009

try :

Code:

 unsigned char MainMenuLIST[2][16] = {
{"Option 1"},
{"Option 2"}
};

dawson · Oct 24, 2009

yes that has solved the error now I can compile the code but i still need to know how LCD_STR() works in comparison to my lcd_out();

AtomSoft · Oct 24, 2009

I'll have to look at lcd out and compare them.

AtomSoft · Oct 24, 2009

I have 2 LCD_STR

Code:

void LCD_STR(unsigned rom char *text){
    while(*text){
        LCD_DATA(*text++,1);
    }
}
void LCD_STR2(unsigned char *text){
    while(*text){
        LCD_DATA(*text++,1);
    }
}

AtomSoft · Oct 24, 2009

Try this:

Code:

#define KeyPORT ((PORTA>>2)&0x0F)
#define KeyDIR  TRISA

#define ENTER 1
#define UP    2
#define DOWN  4

#define LCD_LINE
#define LCD_DATA
#define LCD_STR
// LCD connections definitions
sbit LCD_RS at RA0_bit;
sbit LCD_EN at RA1_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;
sbit LCD_RS_Direction at TRISA0_bit;
sbit LCD_EN_Direction at TRISA1_bit;
sbit LCD_D4_Direction at TRISB0_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
// End LCD connections definitions
 unsigned char MainMenuLIST[2][16] = {
{"Option 1"},
{"Option 2"}
};

unsigned char WaitForInput(void){
	unsigned char temp1;	//TEMP DATA HOLDER
	unsigned char done = 0; //DONE Var will determine if done

	while(!done){				  //while done == 0
		if(KeyPORT>0){			  //if KeyPORT aka PORTB&0x0F.. the &0x0f will make sure we
						  //return the lower part of port only RB0 to RB3
			temp1 = KeyPORT;	  //Place the lower part of port into temp variable
			while(KeyPORT==temp1);    //Like a debounce for button press
			done = 0xFF;		  //Set DONE Var so we know we are complete
		}
	}
	return temp1;				  //Return our temp1 var
}
// String array to store temperature value to display
char *temp = "000.00";

// Temperature Resolution : No. of bits in temp value = 9
const unsigned short TEMP_RES = 9;

// Variable to store temperature register value
unsigned temp_value;

void Display_Temperature(unsigned int temp2write) {
  const unsigned short RES_SHIFT = TEMP_RES - 8;

  // Variable to store Integer value of temperature
  char temp_whole;

  // Variable to store Fraction value of temperature
  unsigned int temp_fraction;

  // check if temperature is negative
  if (temp2write & 0x8000) {
     temp[0] = '-';
     // Negative temp values are stored in 2's complement form
     temp2write = ~temp2write + 1;
     }

  // Get temp_whole by dividing by 2 (DS1820 9-bit resolution with
  // 0.5 Centigrade step )
  temp_whole = temp2write >> RES_SHIFT ;

  // convert temp_whole to characters
  if (temp_whole/100)
  // 48 is the decimal character code value for displaying 0 on LCD
     temp[0] = temp_whole/100  + 48;
  else
     temp[0] = '0';

  temp[1] = (temp_whole/10)%10 + 48;             // Extract tens digit
  temp[2] =  temp_whole%10     + 48;             // Extract ones digit

  // extract temp_fraction and convert it to unsigned int
  temp_fraction  = temp2write << (4-RES_SHIFT);
  temp_fraction &= 0x000F;
  temp_fraction *= 625;

  // convert temp_fraction to characters
  temp[4] =  temp_fraction/1000    + 48;         // Extract tens digit
  temp[5] = (temp_fraction/100)%10 + 48;         // Extract ones digit

  // print temperature on LCD
  Lcd_Out(2, 5, temp);
}
unsigned int digit;

void read_temp() {
   //--- perform temperature reading
    Ow_Reset(&PORTB, 5);      // Onewire reset signal
    Ow_Write(&PORTB, 5, 0xCC);   // Issue command SKIP_ROM
    Ow_Write(&PORTB, 5, 0x44);   // Issue command CONVERT_T
    Delay_ms(600);
    // If this delay is less than 500ms, you will see the first reading on LCD
    //85C which is (if you remember from my article on DS1820)
    //a power-on-reset value.

    Ow_Reset(&PORTB, 5);
    Ow_Write(&PORTB, 5, 0xCC);    // Issue command SKIP_ROM
    Ow_Write(&PORTB, 5, 0xBE);    // Issue command READ_SCRATCHPAD

    // Read Byte 0 from Scratchpad
    temp_value =  Ow_Read(&PORTB, 5);
    // Then read Byte 1 from Scratchpad and shift 8 bit left and add the Byte 0
    temp_value = (Ow_Read(&PORTB, 5) << 8) + temp_value;

    //--- Format and display result on Lcd
    Display_Temperature(temp_value);
}

void MainMenu(void){
unsigned char POS = 0; 	//Used for cursor ONLY!
unsigned char done = 0;
unsigned char x;
unsigned char ITEM=0;

Lcd_Cmd(_LCD_CLEAR);

while(!done){
	for(x=0;x<2;x++){
        LCD_LINE(x+1);

		if(x == POS)
			LCD_DATA('>',1);
		else
			LCD_DATA(' ',1);

        LCD_OUT((x+1),2,MainMenuLIST[x])
	}

	switch(WaitForInput()){
		case UP:
			if(POS>0){
				POS--;
				ITEM--;
			}
			break;
		case DOWN:
			if(POS<1){
				POS++;
				ITEM++;
			}
			break;
		case ENTER:
			done = 0xFF;
			break;
	}
}
	// ITEM contains what item is selected
	// POS isnt used incase larger then 2 menu...

	switch(ITEM){
		case 0:
			//Code to toggle C or F
			break;
		case 1:
			//Code to jump to new menu system
			break;
	}

	//Bring our title back.. cuz we are done with the menu...
    Lcd_Out(1, 3, "Temperature:   ");

}

void main() {
  CMCON  |= 7;                       // Disable Comparators
  KeyDIR = (0x0F<<2);

  Lcd_Init();                        // Initialize LCD
  Lcd_Cmd(_LCD_CLEAR);               // Clear LCD
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Turn cursor off
  Lcd_Out(1,5,message1);             // Write message1 in 1st row
  Lcd_Out(2,4,message2);             // Write message1 in 2nd row
  Delay_ms(2000);
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Out(1, 3, "Temperature:   ");
  // Print degree character, 'C' for Centigrades
  Lcd_Chr(2,11,223);
  // different LCD displays have different char code for degree
  // if you see greek alpha letter try typing 178 instead of 223

  Lcd_Chr(2,12,'C');
  digit = 0;
  //--- main loop
  do {
      if(KeyPORT == ENTER) {
          MainMenu();
      } else {
          read_temp();
      }
    } while (1);
}

dawson · Oct 24, 2009

The code you just posted only displays the temprature it does not seem to register any button presses

AtomSoft · Oct 24, 2009

Are your buttons Pulled low? Aka a resistor tied to gnd and when you press button it pushes VDD to pin..

I finished my entire menu and its working perfect. Here is my complete code ... everything is in a ZIP so i dont have to upload like 6 files heh... you can learn more from see everything i got here:

**broken link removed**

dawson · Oct 24, 2009

no my buttons r tied high like this:

**broken link removed**

Thanks for your code I will take a look through it.

AtomSoft · Oct 24, 2009

There the issue heh. Try changing that define to

#define KeyPORT (~((PORTA>>2)&0x0F))

the. ~. Symbol means opposite I think

dawson · Oct 24, 2009

still does not register any button press, I will take a look through your zip to try and work out where I went wrong

AtomSoft · Oct 24, 2009

how are you checking for a button press?

dawson · Oct 24, 2009

doesnt your code check for button press?

Code:

unsigned char WaitForInput(void){

	unsigned char temp1;	//TEMP DATA HOLDER
	unsigned char done = 0; //DONE Var will determine if done

	while(!done){				  //while done == 0
		if(KeyPORT>0){			  //if KeyPORT aka PORTB&0x0F.. the &0x0f will make sure we 
								  //return the lower part of port only RB0 to RB3
			temp1 = KeyPORT;	  //Place the lower part of port into temp variable
			while(KeyPORT==temp1);//Like a debounce for button press
			done = 0xFF;		  //Set DONE Var so we know we are complete
		}
	}
	return temp1;				  //Return our temp1 var
}

AtomSoft · Oct 24, 2009

yeah but when you are going to press menu/enter to show main menu how are you doing it?

AtomSoft · Oct 24, 2009

Take a look:

**broken link removed**

dawson · Oct 24, 2009

Im not sure what you mean? and your video does not play

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