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authorreinelt <>2002-08-17 14:14:21 +0000
committerreinelt <>2002-08-17 14:14:21 +0000
commitc83e3395fdfe759255c037109604463ef034bb15 (patch)
treefa96b475f95788769798d20b9434accce4d475df /USBLCD.c
parent011dae42e1add1f09fafec9125077afd38a9a837 (diff)
downloadlcd4linux-c83e3395fdfe759255c037109604463ef034bb15.tar.gz
[lcd4linux @ 2002-08-17 14:14:21 by reinelt]
USBLCD fixes
Diffstat (limited to 'USBLCD.c')
-rw-r--r--USBLCD.c115
1 files changed, 67 insertions, 48 deletions
diff --git a/USBLCD.c b/USBLCD.c
index d559741..696316b 100644
--- a/USBLCD.c
+++ b/USBLCD.c
@@ -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;
}