www.elektronik.si

[mbaumga1]

Sem začetnik v programiranju.Ker sem nabavu ravzvojnu plošču AVR5A uporabljam programski jezik mikroC PRO za AVR.Za začetek preizkušam napisane vzorčne programe.Med temi programi pa je tudi program 1-Wire za meritev temperature.
Mene zanima kako dopolniti program da bere temperaturu iz več senzorjev,2,3,ali več.Program z malim spremembami pa izgleda takole:

MCU: ATmega16
Dev.Board: EasyAVR5
Oscillator: External Clock 8.0000 MHz
Ext. Modules: DS18x20, LCD
SW: mikroC PRO for AVR
* NOTES:
- Place jumper J9 to the right(PB2).
- Pull-up and turn off the LED on pin used for one wire bus (PB2) may be required.
*/

// LCD module connections
sbit LCD_RS at PORTD2_bit;
sbit LCD_EN at PORTD3_bit;
sbit LCD_D4 at PORTD4_bit;
sbit LCD_D5 at PORTD5_bit;
sbit LCD_D6 at PORTD6_bit;
sbit LCD_D7 at PORTD7_bit;

sbit LCD_RS_Direction at DDD2_bit;
sbit LCD_EN_Direction at DDD3_bit;
sbit LCD_D4_Direction at DDD4_bit;
sbit LCD_D5_Direction at DDD5_bit;
sbit LCD_D6_Direction at DDD6_bit;
sbit LCD_D7_Direction at DDD7_bit;
// End LCD module connections

// Set TEMP_RESOLUTION to the corresponding resolution of used DS18x20 sensor:
// 18S20: 9 (default setting; can be 9,10,11,or 12)
// 18B20: 12

const unsigned short TEMP_RESOLUTION = 9;

char *text = " 00.0000";
unsigned temp;

void Display_Temperature(unsigned int temp2write) {
const unsigned short RES_SHIFT = TEMP_RESOLUTION - 8;
char temp_whole;
unsigned int temp_fraction;

// check if temperature is negative
if (temp2write & 0x8000) {
text[1] = '-';
temp2write = ~temp2write + 1;
}

// extract temp_whole
temp_whole = temp2write >> RES_SHIFT ;

// convert temp_whole to characters
//if (temp_whole/100)
//text[0] = temp_whole/100 + 48;
//else
// text[0] = '0';

text[1] = (temp_whole/10)%10 + 48; // Extract tens digit
text[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
text[4] = temp_fraction/1000 + 48; // Extract thousands digit
text[5] = (temp_fraction/100)%10 + 48; // Extract hundreds digit
text[6] = (temp_fraction/10)%10 + 48; // Extract tens digit
text[7] = temp_fraction%10 + 48; // Extract ones digit

// print temperature on LCD
Lcd_Out(1, 7, text);
}

void main() {

Lcd_Init(); // Initialize LCD
Lcd_Cmd(_LCD_CLEAR); // Clear LCD
Lcd_Cmd(_LCD_CURSOR_OFF); // Turn cursor off
Lcd_Out(1, 1, "Temp1: ");
// Print degree character, 'C' for Centigrades
Lcd_Chr(1,15,223); // Different LCD displays have different char code for degree
// If you see greek alpha letter try typing 178 instead of 223

Lcd_Chr(1,16,'C');
Lcd_Out(2, 1, "Temp2: ");
Lcd_Chr(2,15,223);
Lcd_Chr(2,16,'C');
//--- main loop
do {
//--- perform temperature reading
Ow_Reset(&PORTB, 2); // Onewire reset signal
Ow_Write(&PORTB, 2, 0xCC); // Issue command SKIP_ROM
Ow_Write(&PORTB, 2, 0x44); // Issue command CONVERT_T
Delay_us(120);

Ow_Reset(&PORTB, 2);
Ow_Write(&PORTB, 2, 0xCC); // Issue command SKIP_ROM
Ow_Write(&PORTB, 2, 0xBE); // Issue command READ_SCRATCHPAD
Delay_ms(400);

temp = Ow_Read(&PORTB, 2);
temp = (Ow_Read(&PORTB, 2) << 8) + temp;

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

Delay_ms(500);
} while (1);
}

Prosim pomoč za spodbudo v nadaljnem delu.

Lep pozdrav

[mbaumga1]

Zanima me kaj menite o programskem jeziku mikriC PRO AVR. Predlagajte mi boljšega za začetnika da podpira razvojno ploščo AVR5A.
Hvala za nasvete
LP

[Krampus]

Dobra podpora

http://www.mikroe.com/forum/viewforum.php?f=139

[kranjc]

Jaz imam za PICke mikroC pa se mi zdi super. Ima odlično pomoč z primeri ter zelo bogate knjižnice.