In the last episode (Jun 11), Bernard Dugas said: > Not sure, but i'm using the serial port only to read and write > electrical values, to command power relays. On mickey systems, serial > drivers are far to complicated for that. > > Did anybody write a simple kernel module doing just that ? > > #include <sys/io.h> > #include <stdio.h> > > void getComValues(int adr,unsigned char *p_TxdS3, > unsigned char *p_DtrS4,unsigned char *p_RtsS7, > unsigned char *p_CtsE8,unsigned char *p_DsrE6, > unsigned char *p_RiE9,unsigned char *p_DcdE1) > { > unsigned char val3,val4,val6; > > val3=inb(adr+3); > *p_TxdS3=(val3&64)>>6 ; //récupère le bit 6 > > val4=inb(adr+4); > *p_DtrS4=val4&1 ; //récupère le bit 0 > *p_RtsS7=(val4&2)>>1 ; //récupère le bit 1 > > val6=inb(adr+6); > *p_CtsE8=(val6&16)>>4 ; //récupère le bit 4 > *p_DsrE6=(val6&32)>>5 ; //récupère le bit 5 > *p_RiE9=(val6&64)>>6 ; //récupère le bit 6 > *p_DcdE1=(val6&128)>>7 ; //récupère le bit 7
Take a look at the tty(4) manpage; you should be able to open /dev/cuaa0 (aka COM1), then use the TIOCMGET and TIOCMSET ioctls to get and set the appropriate status bits, all from userland. The comms/sredird port uses this to provide remote virtual serial ports with perfect control. -- Dan Nelson [EMAIL PROTECTED] _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"