LM35 Project Software

1unsigned char ch; 2unsigned int adc_rd; 3char *text; 4long tlong; 5char *tempc = "000.0"; 6 7void deviceSetup(){ 8 INTCON = 0; // disable all interrupts 9 10 ANSEL = 0x04; // Configure AN2 pin as analog input 11 TRISA = 0x04; 12 ANSELH = 0; 13 ADCON1 = 0x82; // configure VDD as Vref, and analog channels 14 TRISA = 0xFF; // designate PORTA as input 15 16 UART1_Init(9600); 17 Delay_ms(100); 18} 19 20void main() { 21 22 Lcd_Config(&PORTB, 4, 5, 6, 3, 2, 1, 0); // Lcd_Init_EP5, see Autocomplete 23 LCD_Cmd(LCD_CURSOR_OFF); // send command to LCD (cursor off) 24 LCD_Cmd(LCD_CLEAR); // send command to LCD (clear LCD) 25 26 text = "LM 35 Project"; // assign text to string 27 LCD_Out(1,1,text); // print string a on LCD, 1st row, 1st column 28 29 Delay_ms(2000); 30 text = "Temp:"; // assign text to string 31 32 33 while (1) { 34 adc_rd = ADC_read(2); // get ADC value from 2nd channel 35 LCD_Out(2,1,text); // print string a on LCD, 2nd row, 1st column 36 37 tlong = (long)adc_rd * 5000; // covert adc reading to milivolts 38 tlong = tlong / 1023; // 0..1023 -> 0-5000mV 39 40 ch = tlong / 1000; // extract leading temp digit 41 tempc[1] = ch+48; 42 43 ch = (tlong / 100) % 10; // extract 0.1 temp digit 44 LCD_Chr_CP(48+ch); // write ASCII digit at cursor point 45 tempc[2] = ch+48; 46 47 ch = (tlong / 10) % 10; // extract 0.01 temp digit 48 tempc[3] = ch+48; 49 LCD_Chr_CP(48+ch); // write ASCII digit at cursor point 50 LCD_Chr_CP(48+ch); // write ASCII digit at cursor point 51 LCD_Chr_CP('C'); 52 tempc[4] = ch+48; 53 54 UART1_Write(tempc[2]); 55 UART1_Write(tempc[3]); 56 UART1_Write_Text("."); 57 UART1_Write(tempc[4]); 58 59 UART1_Write(13); 60 UART1_Write(10); 61 Delay_ms(100); 62 63 } 64}//~!