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Keil C51µÄÇ¿ÖÆÀàÐÍת»»ÎÊÌâ¼ûÏÂÃæµÄ³ÌÐò£º bit shout(unsigned char write_data) { unsigned char i; bit ack_bit; for(i = 0; i < 8; i++) { SDA = (bit)(write_data & 0x80); _nop_(); SCL = 1; _nop_(); _nop_(); SCL = 0; write_data <<= 1; } SDA = 1; _nop_(); _nop_(); SCL = 1; _nop_(); _nop_(); _nop_(); _nop_(); ack_bit = SDA; // ¶ÁȡӦ´ð SCL = 0; return ack_bit; // ·µ»ØAT24CxxÓ¦´ðλ } ÆäÖÐSDA = (bit)(write_data & 0x80);Óï¾äÊÇ·ñÊÇÇ¿ÖÆÀàÐÍת»»£¬¾ßÌ庬ÒåÊÇʲô£¿ Çë¸ßÊÖÖ¸½Ì [ Last edited by bslt on 2009-5-11 at 10:41 ] |
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bslt(½ð±Ò+1,VIP+0):»¶Ó³£À´ÐÅÏ¢°æ½»Á÷ÌÖÂÛ£¡ 5-11 10:13
bslt(½ð±Ò+1,VIP+0):»¶Ó³£À´ÐÅÏ¢°æ½»Á÷ÌÖÂÛ£¡ 5-11 10:13
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SDA = (bit)(write_data & 0x80); Â¥ÉÏ˵µÄ¶ÔÊ±Ç¿ÖÆÀàÐÍת»»£¬·ÇÁã¼´Ò»¡£ ÎÒÈÏΪÈç¹ûÓëÍêºóµÄ½á¹ûÊÇÁ㣬SDA¾ÍÊÇÒ»¸öbit 0; Èç¹ûÓëÍêºó½á¹û²»ÊÇÁ㣬SDA¾ÍÊÇÒ»¸öbit 1. |
4Â¥2009-05-10 14:57:20
bigmouth1027
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sinapdb(½ð±Ò+1,VIP+0):thanks
sinapdb(½ð±Ò+1,VIP+0):thanks
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2Â¥2008-08-22 11:44:56
hid
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gjliu(½ð±Ò+1,VIP+0):лл½»Á÷¡£ 5-10 12:51
gjliu(½ð±Ò+1,VIP+0):лл½»Á÷¡£ 5-10 12:51
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SDA = (bit)(write_data & 0x80); write_dataºÍ0x80λÓëµÄ½á¹¹´æ·ÅÔÚÁÙʱ±äÁ¿ÀïÃæ£¬¿ÉÄÜÖµ¾ÍÊÇ0x80ºÍ0x00 Ç¿ÖÆ×ª»»£¬·ÇÁãΪ1 |
3Â¥2009-05-09 23:16:37













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