Interfacing external ADC0808 with PIC18F4522

ADC PIC
-------------------
OUT1 RB7
OUT2 RB6
OUT3 RB5
0UT4 RB4
OUT5 RB3
OUT6 RB2
OUT7 RB1
OUT8 RB0

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Code C - [expand]
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unsigned int temp_res,cal; char last[5];
 
void main() {
TRISb = 0b11111111; // PORTB is input
lcd_init();
Lcd_Cmd(_LCD_CLEAR);
Lcd_Cmd(_LCD_CURSOR_OFF);
do { temp_res = portb; // Get 8-bit results of AD conversion
cal = (temp_res);
inttostr(cal,last);
Lcd_Out(1,1,”temp”);
Lcd_Out(1,6,last);
Lcd_Out(1,13,”C”);
Lcd_Out(1,15,” “);
} while(1);
}

betwixt said:

Is 'cal' an int or a char? Perhaps you have declared it as a char (technically it should be an unsigned char) but the inttostr() function expects an integer value.
Try changing "inttostr(cal,last);" to "inttostr((int)cal,last); and see if it makes a diiference.

When posting code, please wrap it in code tags, copy and paste it to the message then highlight it and click the # icon above the message window, it tells the forum to display it in it's original format instead of stripping all the leading spaces.

Brian.

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