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bgvsan
Joined: 24 Aug 2008
Posts: 5
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| lcd bar graph... it goes also to the left? |
 Posted: Sun Aug 24, 2008 5:45 pm |
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I need some help to solve a little problem..
I found this code on this forum..
http://www.ccsinfo.com/forum/viewtopic.php?t=22965
this is great and works!
But now i put the beginning of the bar, in the middle, and goes to the left for ADC value from 0 to 255 and to the right from 256 to 512.
The problem is to put the bar to the left... here is "my" code.
| Code: |
long value;
int A;
void main() {
setup_adc_ports(RA0_ANALOG);
setup_adc(ADC_CLOCK_INTERNAL);
lcd_init();
delay_us(20);
init_user_chars(); // loads special characters into LCD CGRAM for bargraph
set_adc_channel(0);
delay_us(10);
while(1)
{
value=read_adc(); //read the ADC
delay_us(50); //pause so we don't blur the LCD display
A=(value/17)*2; //calculate the full scale for our bar//raddoppiato per tensioni di 5 volts
lcd_putc('\f'); //clear the LCD
printf(lcd_putc, "value = %lu \n",value); //Print top line with ADC value
if (value<=255){
lcd_putc(A);
bargraph_back(A); //print line 2 with the bargraph output.
}
else
bargraph(A); //print line 2 with the bargraph output.
}
}
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How should i create the bargraph_back?  |
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treitmey
Joined: 23 Jan 2004
Posts: 1094
Location: Appleton,WI USA
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| Posted: Mon Aug 25, 2008 10:11 am |
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I think you want to overwrite the area defined for bar with spaces.
This will clear the bar graph.
Then redraw with new value. |
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bgvsan
Joined: 24 Aug 2008
Posts: 5
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| Posted: Tue Aug 26, 2008 2:03 am |
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i've found the solution... at 3.00 A.M. 
| Code: | void bargraph_back(BYTE percent) {
//**************** Variabili****************//
int Bars; // Numero di barre intere.
int Balance; // Numero di barre ancora da scrivere non intere.
int i, ind;
Bars = percent/3; // Quante sono le barre intere da 3?
Balance = percent%3; // Conta se ha bisogno di porzioni di barre
lcd_gotoxy(20,2); // sposta il puntatore in posizione 20 II spam(meta negativa lcd)
ind=19; //inizia dalla posizione 19
for (i=0; i<Bars;i++)
{ output_high(PIN_A1);
delay_us(100);
output_low(PIN_A1);
lcd_putc(0x02); //Utilizzo putc per evitare l'<umento in posizione.
lcd_gotoxy(ind,2);
ind=ind-1;} //Riporto l'indirizzo Ram 1 posto indietro.
switch (Balance) { //Mostra le barre restanti
case 0: break;
case 1: lcd_putc(0x03);break;
case 2: lcd_putc(0x04);break;
}
} |
this is the function for any one who wants your bar goes like this
* ||||||||||||||||||||* forward
*||||||||||||||||| *back
But now i need an extra Help---
I need to show to display a variable float----
example: G= 2,007896
* |||||||||||||||||||G2,00*
only 2 char after the comma. |
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crystal_lattice
Joined: 13 Jun 2006
Posts: 164
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| Posted: Tue Aug 26, 2008 5:04 am |
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When I have some time I would like to give your code a try as I have a battery level indication application where this will work nicely!
In your code add a call to the lcd_gotoxy() and set the co-ordinates to be just behind/before the end/start of the bar depending on your application. Then use printf("G%2.2f", your_float). This will give you two decimals before and after the "." and will start printing at the co-ordinates you specified. |
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bgvsan
Joined: 24 Aug 2008
Posts: 5
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| Posted: Tue Aug 26, 2008 5:45 am |
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compiler send back an error
STDOUT not defined (may be missing #rs232)
the error is on the float variable (is declared as global)
any other solution? |
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bgvsan
Joined: 24 Aug 2008
Posts: 5
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| Posted: Tue Aug 26, 2008 4:17 pm |
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i found
| Code: | | printf(lcd_putc, "\g%1.2f", G); //Visualizza il valore dell'ADC. |
from lcd.h
| Code: | | case '\g' : lcd_gotoxy(37,2); break; |
[URL=http://g.imageshack.us/g.php?h=299&i=lcd2ca4.jpg][IMG]http: |
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