Hy zusammen,
Ich versuche gerade den "UART mit Interrupt" vom ATMega32M1 zu laufen zu
bekommen,
Aber ich bekomme da nur murks raus. Hterm zeigt nur \0\0\0 usw.
Das einzige was mir aufgefallen ist wenn ich ein 0x55 sende, gekomme ich
auf dem Terminal \0\0\0\0\0
1 | #include <avr/io.h>
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2 | #include <avr/interrupt.h>
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3 |
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4 | #define F_CPU 8000000UL
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5 | #define BAUD 9600
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6 |
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7 |
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8 | ISR(LIN_TC_vect){
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9 |
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10 | DATA_INT_RX = LINDAT ;
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11 | }
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12 |
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13 |
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14 | /************************************************************************/
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15 | /* UART-Init */
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16 | /************************************************************************/
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17 |
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18 | void UART_Init( void)
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19 | {
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20 | //LIN/UART / Enable || Full Duplex
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21 | LINCR |= ((1<<LENA)|(1<<LCMD2)|(1<<LCMD1)|(1<<LCMD0));
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22 |
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23 | LINBTR |=((1<<LBT5));//Default(32)
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24 | LINBRRH = ((F_CPU/(LINBTR*BAUD))-1)>>8;
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25 | LINBRRL = ((F_CPU/(LINBTR*BAUD))-1);
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26 |
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27 | //Enable TX & RX
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28 | LINSIR |= ((1<<LTXOK)|(1<<LRXOK));
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29 |
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30 | //Enable RX interrupt
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31 | LINENIR |= ((1<<LENRXOK));
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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 | /* UART - Transmit Funktion */
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37 | /************************************************************************/
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38 |
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39 | int uart_transmit (char byte_data) {
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40 |
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41 | while((LINSIR & (1 << LBUSY)));
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42 | LINDAT = byte_data;
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43 | return 0;
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44 | }
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45 |
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46 |
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47 | /************************************************************************/
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48 | /* UART - Receive Funktion */
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49 | /************************************************************************/
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50 |
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51 | char uart_receive(void) {
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52 |
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53 | while((LINSIR & (1 << LBUSY)));// Wait while the UART is busy.
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54 | return DATA_INT_RX;
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55 | }
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56 |
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57 |
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58 | int main(void)
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59 | {
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60 | unsigned char DATA = 0x55;
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61 |
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62 | DDRC |= (1<<PC7);
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63 | PORTC |= (1<<PC7);
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64 |
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65 | UART_Init();
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66 |
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67 | sei();
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68 | uart_transmit('T');
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69 | uart_transmit('E');
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70 | uart_transmit('S');
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71 | uart_transmit('T');
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72 |
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73 | while(1)
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74 | {
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75 | DATA = uart_receive();
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76 | uart_transmit(DATA);
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77 | }
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78 | return 0;
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79 | }
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Hoffe Ihr könnt mir da weiter Helfen.
mfg
Rolf
