1 | //
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2 | // Anpassungen im makefile:
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3 | // ATMega8 => MCU=atmega32 im makefile einstellen
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4 | // lcd-routines.c in SRC = ... Zeile anhängen
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5 | //
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6 | #include <stdlib.h>
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7 |
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8 | #include <avr/io.h>
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9 |
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10 | #include <avr/delay.h>
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11 |
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12 |
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13 | #define SS PB4
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14 | #define MOSI PB5
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15 | #define MISO PB6
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16 | #define SCK PB7
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17 |
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18 | int steuerwort;
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19 | void SPI_init() ;
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20 | void SPI_TX(int a);
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21 | int main(void)
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22 | {
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23 | _delay_ms(2);
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24 |
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25 | SPI_init();
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26 |
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27 | _delay_us(2000);
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28 | steuerwort=0b00100001;
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29 | SPI_TX(steuerwort);
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30 | steuerwort=0b00000000;
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31 | SPI_TX(steuerwort);
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32 |
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33 |
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34 |
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35 |
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36 | _delay_us(1000);
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37 | steuerwort=0b01010000;
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38 | SPI_TX(steuerwort);
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39 | steuerwort=0b11000111;
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40 | SPI_TX(steuerwort);
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41 |
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42 |
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43 |
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44 |
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45 | _delay_us(1000);
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46 | steuerwort=0b01000000;
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47 | SPI_TX(steuerwort);
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48 | steuerwort=0b00000000;
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49 | SPI_TX(steuerwort);
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50 |
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51 |
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52 |
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53 |
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54 | _delay_us(1000);
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55 | steuerwort=0b11000000;
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56 | SPI_TX(steuerwort);
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57 | steuerwort=0b00000000;
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58 | SPI_TX(steuerwort);
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59 |
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60 |
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61 |
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62 |
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63 |
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64 | _delay_us(1000);
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65 | steuerwort=0b00100000;
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66 | SPI_TX(steuerwort);
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67 | steuerwort=0b00000000;
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68 | SPI_TX(steuerwort);
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69 |
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70 | _delay_us(0100);
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71 | while(1){
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72 |
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73 |
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74 |
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75 | }
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76 | return 0;
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77 | }
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78 |
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79 |
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80 |
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81 |
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82 | void SPI_init() //SPI initialization
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83 | {
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84 | DDRB = (1 << SS) | (1 << MOSI) | (1 << SCK);
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85 | PORTB|=(1<<SS);
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86 | SPCR|=(1<<MSTR);
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87 | SPCR&=~(1<<SPR1);
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88 | SPCR&=~(1<<SPR0);
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89 | SPSR|=(1<<SPI2X);
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90 | SPCR|=(1<<SPE);
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91 | SPCR|=(1<<CPOL);
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92 | SPCR&=~(1<<CPHA);
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93 | }
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94 |
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95 | void SPI_TX(int a)
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96 | {
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97 |
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98 | SPDR=a;
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99 | while(!(SPSR &(1<<SPIF))); //wait until SPIF get high
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100 | }
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