MINZKN의 블로그

span class=postbody이것은 간단히 Serial 통신을 하는 예제입니다. br / serial로부터 받은 데이터를 고스란히 다시 반향하여 보내는 것입니다. br / br / 현재 코드는 br / /spantable align=center border=0 cellpadding=3 cellspacing=1 width=90%tbodytr tdspan class=genmedb인용:/b/span/td /tr tr td class=quoteport=COM1 (/dev/ttyS0) br / baud=9600 br / parity=true br / stop=1 br / data=8bit br / /td /tr/tbody/tablespan class=postbody로 만들어져 있습니다. br / br / /spantable align=center border=0 cellpadding=3 cellspacing=1 width=90%tbodytr tdspan class=genmedb코드:/b/span/td /tr tr td class=code br / /* br / nbsp; Copyright (C) Information Equipment co.,LTD br / nbsp; All rights reserved. br / nbsp; Code by JaeHyuk Cho lt;mailto:minzkn@infoeq.comgt; br / nbsp; CVSTAG=$Header$ br / */ br / br / #include lt;sys/types.hgt; br / #include lt;sys/time.hgt; br / #include lt;stdio.hgt; br / #include lt;unistd.hgt; br / #include lt;fcntl.hgt; br / #include lt;malloc.hgt; br / #include lt;string.hgt; br / #include lt;memory.hgt; br / #include lt;signal.hgt; br / #include lt;errno.hgt; br / #include lt;termios.hgt; br / br / #define mz_dump(m_d,m_s) do{int s_o,s_w,s_i;unsigned char s_b[17];if(((void *)(m_d))!=NULL){s_b[16]='\0';s_o=(int)0;\ br / while(s_olt;(m_s)){s_w=((m_s)-s_o)lt;16?((m_s)-s_o):16;printf(%08X,s_o);for(s_i=0;s_ilt;s_w;s_i++){if(s_i==8)printf( | );else printf( );\ br / s_b[s_i]=*(((unsigned char *)(m_d))+s_o+s_i);printf(%02X,s_b[s_i]);if((s_b[s_i]amp;0x80)||(s_b[s_i]lt;' '))s_b[s_i]='.';}\ br / while(s_ilt;16){if(s_i==8)printf(nbsp; nbsp; nbsp;);else printf(nbsp; nbsp;);s_b[s_i]=' ';s_i++;}\ br / printf( [%s]\n,(char *)s_b);s_o+=16;}}else printf(error: dump null\n);}while(0) br / br / int g_mz_break = 0; br / br / void mz_my_signal(int s_signal) br / { br / switch(s_signal) br / { br / nbsp; case SIGINT: br / nbsp; nbsp; nbsp; nbsp;g_mz_break = 1; br / nbsp; nbsp; nbsp; nbsp;(void)signal(s_signal, mz_my_signal); br / nbsp; nbsp; nbsp; nbsp;break; br / nbsp; default: br / nbsp; nbsp; nbsp; nbsp;(void)fprintf(stdout, unknown signal ! (%d)\n, s_signal); br / nbsp; nbsp; nbsp; nbsp;break; br / } br / } br / br / int main(void) br / { br / /* configuration */ br / char *s_device_name = /dev/ttyS0; br / speed_t s_baud = B9600; br / tcflag_t s_data_bits = CS8; br / int s_parity_bit = 1; br / br / int s_handle, s_index, s_check; br / struct termios s_prev_termios, s_new_termios; br / ssize_t s_read_bytes, s_write_bytes; br / struct timeval s_timeval; br / fd_set s_fd_in; br / unsigned char s_buffer[ 4 lt;lt; 10 ]; br / br / (void)signal(SIGINT, mz_my_signal); br / br / s_handle = open(s_device_name, O_RDWR | O_NOCTTY); br / if(s_handle != (-1)) br / { br / nbsp; if(tcgetattr(s_handle, (struct termios *)(amp;s_prev_termios)) == 0) br / nbsp; { br / nbsp; nbsp;(void)memcpy((void *)(amp;s_new_termios), (void *)(amp;s_prev_termios), (size_t)sizeof(struct termios)); br / br / nbsp; nbsp;s_new_termios.c_iflag = IGNBRK | ((s_parity_bit == 0) ? ((tcflag_t)0) : IGNPAR); br / nbsp; nbsp;s_new_termios.c_oflag = (tcflag_t)0; br / nbsp; nbsp;s_new_termios.c_cflag = s_data_bits | CLOCAL | CREAD; br / nbsp; nbsp;s_new_termios.c_lflag = (tcflag_t)0; br / nbsp; nbsp;for(s_index = 0;s_index lt; NCCS;s_index++)s_new_termios.c_cc[s_index] = (cc_t)0; br / nbsp; nbsp;s_new_termios.c_cc[VMIN] = (cc_t)1; br / nbsp; nbsp;s_new_termios.c_cc[VTIME] = (cc_t)0; br / br / nbsp; nbsp;if(cfsetispeed((struct termios *)(amp;s_new_termios), s_baud) == 0 amp;amp; br / nbsp; nbsp; nbsp; cfsetospeed((struct termios *)(amp;s_new_termios), s_baud) == 0) br / nbsp; nbsp;{ br / nbsp; nbsp; if(tcsetattr(s_handle, TCSANOW, (struct termios *)(amp;s_new_termios)) == 0) br / nbsp; nbsp; { br / nbsp; nbsp; nbsp;if(tcflush(s_handle, TCIOFLUSH) == 0) br / nbsp; nbsp; nbsp;{ br / nbsp; nbsp; nbsp; (void)fprintf(stdout, Ready serial\n); br / nbsp; nbsp; nbsp; do br / nbsp; nbsp; nbsp; { br / nbsp; nbsp; nbsp; nbsp;FD_ZERO(amp;s_fd_in); br / nbsp; nbsp; nbsp; nbsp;FD_SET(s_handle, amp;s_fd_in); br / nbsp; nbsp; nbsp; nbsp;s_timeval.tv_sec = (long)1, s_timeval.tv_usec = (long)0; br / nbsp; nbsp; nbsp; nbsp;s_check = select(s_handle + 1, (fd_set *)(amp;s_fd_in), (fd_set *)0, (fd_set *)0, (struct timeval *)(amp;s_timeval)); br / nbsp; nbsp; nbsp; nbsp;if(s_check gt; 0) br / nbsp; nbsp; nbsp; nbsp;{ br / nbsp; nbsp; nbsp; nbsp; s_read_bytes = read(s_handle, (void *)(amp;s_buffer[0]), (size_t)sizeof(s_buffer)); br / nbsp; nbsp; nbsp; nbsp; if(s_read_bytes gt; ((ssize_t)0)) br / nbsp; nbsp; nbsp; nbsp; { br / nbsp; nbsp; nbsp; nbsp; nbsp;(void)fprintf(stdout, recv data %d byte(s) {\n, (int)s_read_bytes); br / nbsp; nbsp; nbsp; nbsp; nbsp;mz_dump(amp;s_buffer[0], s_read_bytes); br / nbsp; nbsp; nbsp; nbsp; nbsp;(void)fprintf(stdout, }\n); br / #if 1 /* echo part */ br / nbsp; nbsp; nbsp; nbsp; nbsp;s_write_bytes = write(s_handle, (void *)(amp;s_buffer[0]), (size_t)s_read_bytes); br / nbsp; nbsp; nbsp; nbsp; nbsp;(void)fprintf(stdout, echo %d/%d byte(s)\n, (int)s_write_bytes, (int)s_read_bytes); br / #endif br / nbsp; nbsp; nbsp; nbsp; } br / nbsp; nbsp; nbsp; nbsp; else if(s_read_bytes == ((ssize_t)0))(void)fprintf(stdout, no data\n); br / nbsp; nbsp; nbsp; nbsp; else (void)perror(read); br / nbsp; nbsp; nbsp; nbsp;} br / nbsp; nbsp; nbsp; nbsp;else if(s_check == 0)(void)fprintf(stdout, wait\n); br / nbsp; nbsp; nbsp; nbsp;else (void)perror(select); br / nbsp; nbsp; nbsp; }while(g_mz_break == 0); br / nbsp; nbsp; nbsp; (void)fprintf(stdout, End of serial\n); br / nbsp; nbsp; nbsp;} br / nbsp; nbsp; nbsp;else (void)perror(tcflush); br / nbsp; nbsp; } br / nbsp; nbsp; else (void)perror(tcsetattr); br / nbsp; nbsp;} br / nbsp; nbsp;else (void)perror(cfset{i/o}speed); br / nbsp; nbsp;if(tcsetattr(s_handle, TCSANOW, (struct termios *)(amp;s_prev_termios)) != 0)(void)perror(tcsetattr(restore)); br / nbsp; } br / nbsp; else (void)perror(tcgetattr); br / nbsp; (void)close(s_handle); br / } br / else (void)perror(open); br / return(1); br / } br / br / /* vim: set expandtab: */ br / /* End of source *//td/tr/tbody/table

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