| 0,0 → 1,175 |
|---|
| /**** IR Mrakomer3 ****/ |
| #define VERSION "3.0" |
| #define ID "$Id: $" |
| #include "main.h" |
| |
| #define SA 0x00 // Slave Address (0 for single slave / 0x5A<<1 default) |
| #define RAM_Access 0x00 // RAM access command |
| #define RAM_Tobj1 0x07 // To1 address in the eeprom |
| #define RAM_Tamb 0x06 // Ta address in the eeprom |
| #define HEATING PIN_A2 // Heating for defrosting |
| #define MAXHEAT 60 // Number of cycles for heating |
| |
| char VER[4]=VERSION; |
| char REV[50]=ID; |
| |
| unsigned char PEC_calculation(unsigned char pec[]) // CRC calculation |
| { |
| unsigned char crc[6]; |
| unsigned char BitPosition=47; |
| unsigned char shift; |
| unsigned char i; |
| unsigned char j; |
| unsigned char temp; |
| |
| do |
| { |
| crc[5]=0; /* Load CRC value 0x000000000107 */ |
| crc[4]=0; |
| crc[3]=0; |
| crc[2]=0; |
| crc[1]=0x01; |
| crc[0]=0x07; |
| BitPosition=47; /* Set maximum bit position at 47 */ |
| shift=0; |
| |
| //Find first 1 in the transmited message |
| i=5; /* Set highest index */ |
| j=0; |
| while((pec[i]&(0x80>>j))==0 && i>0) |
| { |
| BitPosition--; |
| if(j<7) |
| { |
| j++; |
| } |
| else |
| { |
| j=0x00; |
| i--; |
| } |
| }/*End of while */ |
| |
| shift=BitPosition-8; /*Get shift value for crc value*/ |
| |
| |
| //Shift crc value |
| while(shift) |
| { |
| for(i=5; i<0xFF; i--) |
| { |
| if((crc[i-1]&0x80) && (i>0)) |
| { |
| temp=1; |
| } |
| else |
| { |
| temp=0; |
| } |
| crc[i]<<=1; |
| crc[i]+=temp; |
| }/*End of for*/ |
| shift--; |
| }/*End of while*/ |
| |
| //Exclusive OR between pec and crc |
| for(i=0; i<=5; i++) |
| { |
| pec[i] ^=crc[i]; |
| }/*End of for*/ |
| } while(BitPosition>8);/*End of do-while*/ |
| |
| return pec[0]; |
| }/*End of PEC_calculation*/ |
| |
| |
| int16 ReadTemp(int8 addr, int8 select) // Read sensor RAM |
| { |
| unsigned char arr[6]; // Buffer for the sent bytes |
| int8 crc; // Readed CRC |
| int16 temp; // Readed temperature |
| |
| i2c_stop(); |
| i2c_start(); |
| i2c_write(addr); |
| i2c_write(RAM_Access|select); // Select the teperature sensor in device |
| i2c_start(); |
| i2c_write(addr); |
| arr[2]=i2c_read(1); // lo |
| arr[1]=i2c_read(1); // hi |
| temp=MAKE16(arr[1],arr[2]); |
| crc=i2c_read(0); //crc |
| i2c_stop(); |
| |
| arr[5]=addr; |
| arr[4]=RAM_Access|select; |
| arr[3]=addr; |
| arr[0]=0; |
| if (crc != PEC_calculation(arr)) temp=0; // Calculate and check CRC |
| |
| return temp; |
| } |
| |
| void main() |
| { |
| unsigned int16 n, temp, tempa; |
| signed int16 ta, to; |
| int8 i; |
| |
| output_low(HEATING); // Heating off |
| setup_wdt(WDT_2304MS); // Setup Watch Dog |
| setup_adc_ports(NO_ANALOGS); |
| setup_adc(ADC_OFF); |
| setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1); |
| setup_timer_1(T1_DISABLED); |
| setup_timer_2(T2_DISABLED,0,1); |
| setup_comparator(NC_NC_NC_NC); |
| setup_vref(FALSE); |
| setup_oscillator(OSC_4MHZ|OSC_INTRC); |
| |
| delay_ms(1000); |
| printf("\n\r* Mrakomer %s (C) 2007 KAKL *\n\r",VER); // Welcome message |
| printf("* %s *\n\r\n\r",REV); |
| tempa=ReadTemp(SA, RAM_Tamb); // Dummy read |
| temp=ReadTemp(SA, RAM_Tobj1); |
| |
| n=0; |
| i=MAXHEAT; |
| |
| while(TRUE) |
| { |
| n++; |
| |
| if (kbhit()) if ('w'==getc()) i=0; // Would you like warmer? |
| |
| tempa=ReadTemp(SA, RAM_Tamb); // Read temperatures from sensor |
| temp=ReadTemp(SA, RAM_Tobj1); |
| |
| if((0==tempa)||(0==temp)) // Transfer error? |
| { |
| printf("%Lu;ta:-273;ts:-273;Error\n\r",n); |
| output_low(HEATING); |
| } |
| else |
| { |
| to=(signed int16)(temp*2-27315)/100; |
| ta=(signed int16)(tempa*2-27315)/100; |
| |
| printf("%Lu;ta:%Ld;ts:%Ld;",n,ta,to); |
| if (i>=MAXHEAT) |
| { |
| printf("OK\n\r"); |
| output_low(HEATING); |
| } |
| else |
| { |
| printf("Heating\n\r"); |
| output_high(HEATING); |
| i++; |
| } |
| }; |
| restart_wdt(); |
| delay_ms(900); |
| } |
| } |
| |