Atmel AVR2070 Bedienungsanleitung PDF herunterladen (Seite 47)

A Anhang

1 /* * * ** * *** *** *** *** *** * ** * ** * *** *** ***

2 copyright ( c) 2007 Axel Wachtler

3 modfied by Mirco Kern , FH Du e sseldorf

4 * ** * *** *** *** *** *** *** * ** * ** * ** * *** ** */

7 /* exampl e : tr a nsmitti n g frames */

8 /* * * *** *** * *** *** *** * *** *** *** * * */

10 /* includ e header files */

11 # inclu de " board .h"

12 # inclu de " tra n sceiver .h "

13 # inclu de " ioutil . h"

14 # inclu de " xmpl .h"

15 # inclu de < util / delay .h>

18 /* variable indicating tx state */

19 static volatile bool tx _ in_pr o gress ;

21 /* variable indicating button state */

22 static volatile bool bu t ton_p r essed ;

25 int main ( void )

26 {

27 /* define PE5 as input */

28 PORTE |= _BV ( PE5 );

29 /* setup pull ups */

30 MCUCR = 0 x00 ;

31 /* c o nfigure interr u p t registers */

32 EIMSK |= _BV ( INT5 );

34 /* ieee 8 0 2 . 1 5 . 4 frame */

35 uint8_t txfrm [] =

36 {1 ,0 , /* faked ieee 80 2 . 1 5 . 4 data frame control field */

37 01 , /* se q u e nce counter */

38 ’1 ’, ’2’ ,’8 ’ , ’R ’, ’F ’ ,’A ’ ,’1 ’, ’: ’,’ ’ ,’H ’ , ’e ’, ’l ’ ,’l ’ ,’o ’,

39 ’X ’, ’X’ /* crc bytes ( overwri t ten by transceiv e r */

40 };

42 /* i nitialize leds ( red switched on ) */

43 LED_INIT ();

45 /* i nitialize the t r ansceiver */

46 DELAY_US ( TR X_INI T _TIM E _US );

47 TRX _ RESET_ L OW ();

48 TRX _ SLPTR_ L OW ();

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Atmel AVR2070 Bedienungsanleitung Seite 47