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crushneck
Joined: 27 Nov 2005
Posts: 29
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| keypad input for analog signal |
 Posted: Sun Feb 05, 2006 9:43 pm |
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I need help on my project...i need to make it like when i press number 1 of my keypad, a current analog input shown in LCD...so also when i press 2,a voltage analog input shown in LCD..i try to edit the code...but the output is wrong...can sumone take a look at my source code...maybe u can help by editing it...thanks
| Code: | #include <18F452.h>
#device adc=10
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,ERRORS) //pin25=c6, pin26=c7
#include <lCD420.c>
#include <kbd.c>
void main() {
char k;
int16 result;
float adcresult;
port_b_pullups(TRUE);
lcd_init();
kbd_init();
setup_adc_ports(AN0);
setup_adc(ADC_CLOCK_DIV_8);
set_adc_channel(0);
while (TRUE) {
result = read_adc();
adcresult = (float)result * (5.0/1024.0);// a to d is 10 bits. 2^10=1024
k=kbd_getc();
if(k!=0)
if(k=='1')//when 1 is pressed, current input shown
lcd_gotoxy(1,2);
printf(lcd_putc, "\n\r ADC (I): %5.2fmA\r\n", adcresult);
delay_ms(100);
if(k=='2')//when 2 is pressed, voltage input shown
lcd_gotoxy(1,3);
printf(lcd_putc, "\n\rADC (V):%5.3fV\r\n", adcresult);
delay_ms(100);
else
lcd_putc(k);
}
} |
Last edited by crushneck on Thu Feb 09, 2006 11:29 am; edited 1 time in total |
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rwyoung
Joined: 12 Nov 2003
Posts: 563
Location: Lawrence, KS USA
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| Posted: Tue Feb 07, 2006 1:42 pm |
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Some questions:
1) Why are you sending newline ('\n') and carriage-return ('\r') characters when you just told the LCD exactly where you wanted to start printing with the gotoxy() function?
2) You have a multi-line comment block started on the line with k=kbd_getc() and ending just before the else statement. I'm supprised the compiler isn't throwing an error but if it isn't then all you are doing is puting the contents of variable k on the lcd at the current position. k could hold any value from 0 to FF because you haven't initialized it or assigned a value. Did you mean to coment out that block of code?
_________________
Rob Young
The Screw-Up Fairy may just visit you but he has crashed on my couch for the last month! |
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crushneck
Joined: 27 Nov 2005
Posts: 29
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| Posted: Tue Feb 07, 2006 7:37 pm |
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| Quote: | | 1) Why are you sending newline ('\n') and carriage-return ('\r') characters when you just told the LCD exactly where you wanted to start printing with the gotoxy() function? |
Sorry i actually dun understand the characters. im new to this programming. can u explain more about the characters? i noe theres a help in PIC C compiler but i still dont get it.
| Code: | | 2) You have a multi-line comment block started on the line with k=kbd_getc() and ending just before the else statement. I'm supprised the compiler isn't throwing an error but if it isn't then all you are doing is puting the contents of variable k on the lcd at the current position. k could hold any value from 0 to FF because you haven't initialized it or assigned a value. Did you mean to coment out that block of code? |
yes. actually i want u to comment this part. i jus want to make it like when number 1 of my keypad, a current analog input shown in LCD. so also when i press 2,a voltage analog input shown in LCD. |
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crushneck
Joined: 27 Nov 2005
Posts: 29
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| Posted: Thu Feb 09, 2006 2:04 am |
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| anyhelp anyone? |
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