1 | #include <p18f4550.h>
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2 | #include <delays.h>
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3 | #include <i2c.h>
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4 |
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5 | #pragma config FOSC = HS
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6 | #pragma config WDT = OFF //Disable watchdog timer
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7 |
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8 | #define LEDPin0 LATDbits.LATD0 //Define LEDPin as PORT D Pin 0
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9 | #define LEDTris0 TRISDbits.TRISD0 //Define LEDTris as TRISD Pin 0
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10 | #define LEDPin1 LATDbits.LATD1 //Define LEDPin as PORT D Pin 1
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11 | #define LEDTris1 TRISDbits.TRISD1 //Define LEDTris as TRISD Pin 1
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12 | #define LEDPin2 LATDbits.LATD2 //Define LEDPin as PORT D Pin 2
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13 | #define LEDTris2 TRISDbits.TRISD2 //Define LEDTris as TRISD Pin 2
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14 | #define LEDPin3 LATDbits.LATD3 //Define LEDPin as PORT D Pin 2
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15 | #define LEDTris3 TRISDbits.TRISD3 //Define LEDTris as TRISD Pin 2
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16 |
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17 | void fadeInOut(void); /* Prototype */
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18 |
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19 | void main()
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20 | {
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21 | //I2C Kommunikation mit SAA1064
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22 | OpenI2C(MASTER, SLEW_OFF);// Initialize I2C module
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23 | SSPADD = 39; //400kHz Baud clock(9) @16MHz
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24 | //100kHz Baud clock(39) @16MHz (scheint bei 20MHz auch zu 100kHz zu führen)
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25 |
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26 | StartI2C();
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27 | WriteI2C(0x70);
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28 | WriteI2C(0x00);
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29 | WriteI2C(0B11001110);
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30 | StopI2C();
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31 |
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32 | //PWM für LED dimmer
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33 | TRISCbits.TRISC2 = 0 ; // setzt den P
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34 | LATCbits.LATC2 = 0 ; // clear PORT
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35 | PR2 = 62; // 62 aus berechnung
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36 | T2CON = 0b00000110 ; /// Vorteiler 1:16
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37 | CCP1CON = 0b00001100 ; // Schaltet PWM ein bit 3 & 4
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38 |
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39 | //Port Konfiguration für LEDs
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40 | LEDTris0 = 0;//Set LED Pin data direction to OUTPUT
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41 | LEDTris1 = 0;//Set LED Pin data direction to OUTPUT
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42 | LEDTris2 = 0;//Set LED Pin data direction to OUTPUT
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43 | LEDTris3 = 0;//Set LED Pin data direction to OUTPUT
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44 | LEDPin0 = 1;//Set LED Pin
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45 | LEDPin1 = 0;//Set LED Pin
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46 | LEDPin2 = 0;//Set LED Pin
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47 | LEDPin3 = 0;
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48 |
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49 | while(1){
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50 | fadeInOut(); //trigger PWM Magic on Port C PIN 2
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51 | if(LEDPin0 == 1){
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52 | LEDPin0 = 0;//Toggle LED Pin
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53 | LEDPin1 = 1;//Toggle LED Pin
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54 | LEDPin2 = 0;//Toggle LED Pin
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55 | LEDPin3 = 0;//Toggle LED Pin
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56 | } else if(LEDPin1 == 1){
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57 | LEDPin0 = 0;//Toggle LED Pin
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58 | LEDPin1 = 0;//Toggle LED Pin
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59 | LEDPin2 = 1;//Toggle LED Pin
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60 | LEDPin3 = 0;//Toggle LED Pin
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61 | } else if(LEDPin2 == 1){
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62 | LEDPin0 = 0;//Toggle LED Pin
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63 | LEDPin1 = 0;//Toggle LED Pin
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64 | LEDPin2 = 0;//Toggle LED Pin
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65 | LEDPin3 = 1;//Toggle LED Pin
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66 | } else if(LEDPin3 == 1){
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67 | LEDPin0 = 1;//Toggle LED Pin
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68 | LEDPin1 = 0;//Toggle LED Pin
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69 | LEDPin2 = 0;//Toggle LED Pin
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70 | LEDPin3 = 0;//Toggle LED Pin
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71 | }
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72 | Delay10KTCYx(20);
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73 | }
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74 | }
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75 |
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76 | void fadeInOut(){
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77 | unsigned char dc ;
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78 | for(dc = 0 ; dc < PR2 ; dc++){
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79 | CCPR1L = dc ;
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80 | Delay10KTCYx(5);
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81 | }
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82 | for(dc = PR2 ; dc > 0 ; dc--){
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83 | CCPR1L = dc ;
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84 | Delay10KTCYx(5);
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85 | }
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86 | }
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