Atmel AVR2070 Manual do Utilizador descarregar pdf (Página 48)

A Anhang

49 DELAY_US ( TR X_RE S ET_T I ME_U S );

50 TRX _ RESET _ HIGH ();

51 trx _ reg_wr i te ( RG_TRX_STATE , CMD_TRX _ OFF );

52 DELAY_US ( TR X_INI T _TIM E _US );

54 /* setup transmitt e r

55 * - c o n f i gure radio c hannel

56 * - enable trans m itters automatic crc16 generation

57 * - go into TX state ,

58 * - enable " transmi t end " IRQ

59 */

60 trx _ bit_wr i te ( SR_CHANNEL , CHANNEL );

61 trx _ bit_wr i te ( SR_TX_AUTO_CRC_ON ,1);

62 trx _ reg_wr i te ( RG_TRX_STATE , CMD_PLL_ON );

63 trx _ reg_wr i te ( RG_IRQ_MASK , TRX_IRQ _TX_EN D );

65 /* enable global interrupts */

66 sei ();

68 /* wait 500 ms and indicate ready state */

69 WAIT500MS ();

70 LED _ SET_VA L UE (1);

72 /* i nitialize variables */

73 tx_ i n_pro g ress = false ;

74 but t on_pr e ssed = false ;

76 while (1)

77 {

78 if ( button_ p resse d == true )

79 {

80 /* indicate busy state */

81 LED _ T OGGLE (1);

82 LED _ T OGGLE (0);

84 /* send frame when button is pressed */

85 if ( tx _in_p r ogres s == false )

86 {

87 tx_in _ progre ss = true ;

88 trx_f r ame_w rite ( sizeof ( txfrm ) , txfrm );

89 TRX_S L PTR_HI GH ();

90 TRX_SL P TR_LOW ();

92 /* " de b o u n c e " button */

93 _delay_ms (100);

94 butto n _press ed = false ;

95 }

96 }

97 }

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Atmel AVR2070 Manual do Utilizador Página 48