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Read : 3688, Vote : 515, Date : 2001-09-01 19:05:12
 
  [ ·Îº¸ºí·° ] ¸ð´ÏÅÍÇÁ·Î±×·¥ [2]
 

·Îº¸ºí·°¿¡ °íºÀ¼®ÀÔ´Ï´Ù. µÎ ¹ø° °­Á°¡ µÇ³»¿ä. ¾îÁ¦´Â Åë½Å¼Óµµ±îÁö ÇßÀ¸´Ï

¿À´ÃÀº Åë½Å ȯ°æ ¼³Á¤ºÎ·¯ ÇÏ·ÁÇÕ´Ï´Ù.

2. Åë½Å ȯ°æ ¼³Á¤

Åë½Å ȯ°æ ¼³Á¤Àº SP_CON ·¹Áö½ºÅÍ¿¡¼­ ÇØÁÝ´Ï´Ù. 196¸Þ´º¾ó¿¡¼­ SP_CONÀ»

º¸½Ã¸é Åë½Åº¸µå°¡ 4°³ ³ª¿Í ÀÖÀ¾´Ï´Ù. ÀúÈñ´Â ¸ðµå 1À» »ç¿ëÇϹǷÎ

SP_CON = 0x08°¡ µË´Ï´Ù. °Å±â´Ù°¡ Åë½ÅÆ÷Æ® Rx¿Í Tx´ÜÀÚ´Â I/O PORT¿Í °â¿ë

µÇ¹Ç·Î ³»°¡ Rx¿Í Tx´ÜÀÚ·Î »ç¿ëÇÏ°Ú´Ù´Â ¼³Á¤À» ÇØÁÖ¾î¾ß ÇÕ´Ï´Ù. µû¶ó¼­

SP_CON = 0x08 | 0x01À» ÇØÁÖ¾î¾ß ÇÏ°í

IOC1¿¡µµ IOC1 = 0x20À» ÇØÁÖ¾î¾ß ÇÕ´Ï´Ù.

´ÙÀ½Àº µ¥ÀÌÅÍ ¼Û¼ö½ÅÀ» ÇÏ·ÁÇÕ´Ï´Ù.

3. µ¥ÀÌÅÍÀÇ ¼Û¼ö½Å

µ¥ÀÌÅÍÀÇ ¼Û¼ö½ÅÀº ¹öÆÛ ¿ªÇÒÀ» ÇÏ´Â SBUF ·¹Áö½ºÅ͸¦ ÅëÇØ

ÀÌ·ç¾îÁý´Ï´Ù. µ¥ÀÌÅ͸¦ ¼Û½ÅÇÏ°í ½ÍÀ¸¸é SBUF¿¡ ¼Û½ÅÇÏ°í ½ÍÀº

µ¥ÀÌÅ͸¦ ½á ³ÖÀ¸¸é ÀÚµ¿À¸·Î ½Ã¸®¾ó Àü¼ÛÀÌ µË´Ï´Ù. ¹Ý´ë·Î PC¿¡¼­

SBUF¿¡ µé¾î¿Â µ¥ÀÌÅ͸¦ ÀÐÀ¸¸é ¼ö½ÅÀÌ ÀÌ·ç¾îÁý´Ï´Ù. ±×·¸´Ù¸é

µ¥ÀÌŸ ¼Û¼ö½Å¿¡¼­ ÇÊ¿äÇÑ °ÍÀº SBUF¿¡ ½á ³ÖÀº µ¥ÀÌÅÍ°¡ ¾ðÁ¦ ¼Û½ÅÀÌ

³¡³µ´ÂÁö ¶Ç´Â ¾ðÁ¦ ¼ö½Å µ¥ÀÌÅÍ°¡ µé¾î ¿Ô´ÂÁö üũ¸¦ ÇØ¾ß ÇÕ´Ï´Ù.

À̶§ »ç¿ëÇÏ´Â ·¹Áö½ºÅÍ°¡ SP_STATÀÔ´Ï´Ù. ¿©±â¼­ Áß¿äÇÏ°Ô »ç¿ëÇÏ´Â

»óźñÆ®°¡ TI(Transmit Interrupt)¿Í RI(Receive Interrupt)ÀÔ´Ï´Ù.

TI´Â µ¥ÀÌÅÍ Àü¼Û½Ã ½ºÅéºñÆ®¸¦ º¸³»¸é ¼ÂÆõǰí RI´Â ¸¶Áö¸· ºñÆ®°¡

µé¾î¿ÔÀ» ¶§ ¼ÂÆõ˴ϴÙ.

¿¹¸¦ µé¾î

void putch ( char ch )
{
       sbuf = ch;
      
       while( ! (sp_stat & 0x20) );
}

char getch ( void )
{
       char ch;
    
       while( ! (sp_stat & 0x40 ) );

       ch = sbuf;

       return ch;
}

¿À´ÃÀº ¿©Áö±îÁö ÇÏ°í¿ä. ´ÙÀ½¿¡ ¹è¿ï ³»¿ëÀº

ÀÎÅÚ HEX Æ÷¸ËÀ» ÇÏ·Á°í ÇÕ´Ï´Ù.

¿À´ÃÀº Åä¿äÀÏÀÎ °ü°è·Î ...

¾îÀ̱¸ ¹ú½á 7½Ã³× ...




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·Îº¸ºí·°    ¸ð´ÏÅÍÇÁ·Î±×·¥ [3] 2001/09/03 3527 472
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