diff options
Diffstat (limited to 'USBLCD.c')
| -rw-r--r-- | USBLCD.c | 115 |
1 files changed, 67 insertions, 48 deletions
@@ -1,4 +1,4 @@ -/* $Id: USBLCD.c,v 1.1 2002/08/17 13:10:22 reinelt Exp $ +/* $Id: USBLCD.c,v 1.2 2002/08/17 14:14:21 reinelt Exp $ * * Driver for USBLCD ( see http://www.usblcd.de ) * This Driver is based on HD44780.c @@ -21,6 +21,11 @@ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * + * $Log: USBLCD.c,v $ + * Revision 1.2 2002/08/17 14:14:21 reinelt + * + * USBLCD fixes + * * Revision 1.0 2002/07/08 12:16:10 radams * * first version of the USBLCD driver @@ -49,6 +54,8 @@ #include <sys/ioctl.h> #include <sys/stat.h> +#include <sys/time.h> + #include "debug.h" #include "cfg.h" #include "display.h" @@ -92,27 +99,42 @@ static SEGMENT Segment[128] = {{ len1:0, len2:0, type:255, used:0, ascii:32 { len1:255, len2:255, type:255, used:0, ascii:255 }}; -static void USBLCD_command (unsigned char cmd, int delay) +static void USBLCD_command (unsigned char cmd) { + char a=0; + + struct timeval now, end; + gettimeofday (&now, NULL); - { - char a=0; - write(usblcd_file,&a,1); - write(usblcd_file,&cmd,1); - } + write(usblcd_file,&a,1); + write(usblcd_file,&cmd,1); + + gettimeofday (&end, NULL); + + debug ("command %x: %d usec", cmd, 1000000*(end.tv_sec-now.tv_sec)+end.tv_usec-now.tv_usec); } -static void USBLCD_write (char *string, int len, int delay) +static void USBLCD_write (char *string, int len) { - { - char a; - while (len--) { - a=*string++; - - if(a==0) write(usblcd_file,&a,1); - write(usblcd_file,&a,1); - } - } + int len0=len; + int dur; + struct timeval now, end; + gettimeofday (&now, NULL); + +#if 0 + while (len--) { + char a=*string++; + if(a==0) write(usblcd_file,&a,1); + write(usblcd_file,&a,1); + } +#else + write(usblcd_file,string,len); + +#endif + gettimeofday (&end, NULL); + dur=1000000*(end.tv_sec-now.tv_sec)+end.tv_usec-now.tv_usec; + debug ("write (%d): %d usec (%d usec/byte)", len0, dur, dur/len0); + } @@ -127,48 +149,48 @@ static int USBLCD_open (void) return -1; } - memset(buf,0,128); + memset(buf,0,sizeof(buf)); if( ioctl(usblcd_file,GET_DRV_VERSION, buf)!=0) { - error ("IOCTL failed, could not get Driver Version!\n"); - return -2; + error ("USBLCD: ioctl() failed, could not get Driver Version!"); + return -2; } ; - debug("Driver Version: %s\n",buf); + debug("Driver Version: %s",buf); if( sscanf(buf,"USBLCD Driver Version %d.%d",&major,&minor)!=2) { - error("Could not read Driver Version!\n"); + error("USBLCD: could not read Driver Version!"); return -4; }; if(major!=1) { - error("Driver Version not supported!\n"); + error("USBLCD: Driver Version not supported!"); return -4; } - memset(buf,0,128); + memset(buf,0,sizeof(buf)); if( ioctl(usblcd_file,GET_HARD_VERSION, buf)!=0) { - error ("IOCTL failed, could not get Hardware Version!\n"); - return -3; + error ("USBLCD: ioctl() failed, could not get Hardware Version!"); + return -3; } ; - debug("Hardware Version: %s\n\n",buf); + debug("Hardware Version: %s",buf); if( sscanf(buf,"%d.%d",&major,&minor)!=2) { - error("Could not read Hardware Version!\n"); + error("USBLCD: could not read Hardware Version!"); return -4; }; if(major!=1) { - error("Hardware Version not supported!\n"); + error("USBLCD: Hardware Version not supported!"); return -4; } - USBLCD_command (0x29, 40); // 8 Bit mode, 1/16 duty cycle, 5x8 font - USBLCD_command (0x08, 40); // Display off, cursor off, blink off - USBLCD_command (0x0c, 1640); // Display on, cursor off, blink off, wait 1.64 ms - USBLCD_command (0x06, 40); // curser moves to right, no shift + USBLCD_command (0x29); // 8 Bit mode, 1/16 duty cycle, 5x8 font + USBLCD_command (0x08); // Display off, cursor off, blink off + USBLCD_command (0x0c); // Display on, cursor off, blink off + USBLCD_command (0x06); // curser moves to right, no shift return 0; } @@ -335,8 +357,8 @@ static void USBLCD_define_chars (void) } break; } - USBLCD_command (0x40|8*c, 40); - USBLCD_write (buffer, 8, 120); // 120 usec delay for CG RAM write + USBLCD_command (0x40|8*c); + USBLCD_write (buffer, 8); } } @@ -353,7 +375,7 @@ int USBLCD_clear (void) Bar[row][col].segment=-1; } } - USBLCD_command (0x01, 1640); // clear display + USBLCD_command (0x01); // clear display return 0; } @@ -370,13 +392,14 @@ int USBLCD_init (LCD *Self) error ("USBLCD: no 'Port' entry in %s", cfg_file()); return -1; } - if (port[0]=='/') Port=strdup(port); - else { + if (port[0]=='/') { + Port=strdup(port); + } else { Port=(char *)malloc(5/*/dev/ */+strlen(port)+1); sprintf(Port,"/dev/%s",port); } - debug ("USBLCD using device %s ", Port); + debug ("using device %s ", Port); s=cfg_get("Size"); if (s==NULL || *s=='\0') { @@ -402,10 +425,8 @@ int USBLCD_init (LCD *Self) void USBLCD_goto (int row, int col) { - int pos; - - pos=(row%2)*64+(row/2)*20+col; - USBLCD_command (0x80|pos, 40); + int pos=(row%2)*64+(row/2)*20+col; + USBLCD_command (0x80|pos); } int USBLCD_put (int row, int col, char *text) @@ -519,7 +540,7 @@ int USBLCD_flush (void) if (Txt[row][col]=='\t') break; *p=Txt[row][col]; } - USBLCD_write (buffer, p-buffer, 40); // 40 usec delay for write + USBLCD_write (buffer, p-buffer); } } @@ -529,10 +550,8 @@ int USBLCD_flush (void) int USBLCD_quit (void) { - debug ("closing port %s", Port); - close(usblcd_file); - exit(0); - + debug ("closing port %s", Port); + close(usblcd_file); return 0; } |