43 #define MAX_DRVOPT	10	/* maximum driver-specific options */
62 	    "    1     1-line display (default 2)",
108     while ((ch = getopt(argc, argv, "Dd:f:o:v")) != -1) {  in main()
129     argc -= optind;  in main()
146     debug(1, "Driver selected for %s", driver->l_name);  in main()
147     driver->l_prepare(devname, drvopts);  in main()
148     atexit(driver->l_finish);  in main()
169 …  fprintf(stderr, "usage: %s [-v] [-d drivername] [-f device] [-o options] [args...]\n", progname);  in usage()
170     fprintf(stderr, "   -D      Increase debugging\n");  in usage()
171     fprintf(stderr, "   -f      Specify device, default is '%s'\n", DEFAULT_DEVICE);  in usage()
172     fprintf(stderr, "   -d      Specify driver, one of:\n");  in usage()
174 	fprintf(stderr, "              %-10s (%s)%s\n",   in usage()
182     fprintf(stderr, "  -o       Specify driver option string\n");  in usage()
203 	    driver->l_command(CMD_BKSP);  in do_char()
206 	    driver->l_command(CMD_CLR);  in do_char()
209 	    driver->l_command(CMD_NL);  in do_char()
212 	    driver->l_command(CMD_CR);  in do_char()
215 	    driver->l_command(CMD_RESET);  in do_char()
218 	    driver->l_command(CMD_HOME);  in do_char()
221 	    driver->l_putc('\\');  in do_char()
224 	    driver->l_command(ch);  in do_char()
233 		driver->l_putc(ch);  in do_char()
241  * to be found on one- and two-line alphanumeric LCDs.
246  * --------------------------------
247  * Strobe (1)		Enable (6)
248  * Data (2-9)		Data (7-14)
255  * VCC (+5V) O------o-------o--------O Module pin 2
257  *                  /      ---
258  *                  \      --- 1uF
259  *                  /       | -
260  *                  \ <-----o--------O Module pin 3
264  * GND       O------o----------------O Module pin 1
296     debug(3, "%s -> 0x%02x", (type == HD_COMMAND) ? "cmd " : "data", data);  in hd44780_output()
297     hd_sctrl(type | HD_WRITE | STROBE);	/* set direction, address */  in hd44780_output()
300     hd_sctrl(type | HD_WRITE | STROBE);	/* lower E */  in hd44780_output()
308     hd_sctrl(type | HD_READ | STROBE);	/* set direction, address */   in hd44780_input()
311     hd_sctrl(type | HD_READ | STROBE);	/* lower E */  in hd44780_input()
313     debug(3, "0x%02x -> %s", val, (type == HD_COMMAND) ? "cmd " : "data");  in hd44780_input()
322     if ((hd_fd = open(devname, O_RDWR, 0)) == -1)  in hd44780_prepare()
341 	    errx(EX_USAGE, "hd44780: unknown option code '%c'", *(cp-1));  in hd44780_prepare()
348     hd_cbits &= ~(STROBE | SELECTIN | AUTOFEED);	/* set strobe, RS, R/W low */  in hd44780_prepare()
350     hd_sctrl(STROBE);  in hd44780_prepare()
367     case CMD_RESET:	/* full manual reset and reconfigure as per datasheet */  in hd44780_command()
410 	/* XXX will not work in 4-line mode, or where readback fails */  in hd44780_command()