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authorreinelt <>2003-02-24 04:50:57 +0000
committerreinelt <>2003-02-24 04:50:57 +0000
commitbd516f7dedd1c2fba87dac81d68a905489638368 (patch)
tree15eea9ec4e50f415a23768ce6de79134f74535a5 /Cwlinux.c
parent90be5ac59fddad620f66ebc9dc813802cd45a7e3 (diff)
downloadlcd4linux-bd516f7dedd1c2fba87dac81d68a905489638368.tar.gz
[lcd4linux @ 2003-02-24 04:50:57 by reinelt]
cwlinux fixes
Diffstat (limited to 'Cwlinux.c')
-rw-r--r--Cwlinux.c90
1 files changed, 65 insertions, 25 deletions
diff --git a/Cwlinux.c b/Cwlinux.c
index 4302b99..f19f386 100644
--- a/Cwlinux.c
+++ b/Cwlinux.c
@@ -1,4 +1,4 @@
-/* $Id: Cwlinux.c,v 1.5 2003/02/22 07:53:09 reinelt Exp $
+/* $Id: Cwlinux.c,v 1.6 2003/02/24 04:50:57 reinelt Exp $
*
* driver for Cwlinux serial display modules
*
@@ -20,6 +20,9 @@
*
*
* $Log: Cwlinux.c,v $
+ * Revision 1.6 2003/02/24 04:50:57 reinelt
+ * cwlinux fixes
+ *
* Revision 1.5 2003/02/22 07:53:09 reinelt
* cfg_get(key,defval)
*
@@ -61,9 +64,7 @@
#define XRES 6
#define YRES 8
-#define CHARS 7
-
-#define DELAY 200
+#define CHARS 15
static LCD Lcd;
static char *Port = NULL;
@@ -113,14 +114,16 @@ static int CW_open(void)
static void CW_write(char *string, int len)
{
- if (write (Device, string, len)==-1) {
- if (errno==EAGAIN) {
- usleep(1000);
- if (write (Device, string, len)>=0) return;
- }
+ int ret;
+
+ ret=write (Device, string, len);
+ if (ret<0 && errno==EAGAIN) {
+ usleep(1000);
+ ret=write (Device, string, len);
+ }
+ if (ret<0) {
error ("Cwlinux: write(%s) failed: %s", Port, strerror(errno));
}
- usleep(DELAY);
}
@@ -130,7 +133,8 @@ static int CW_read(char *string, int len)
ret=read (Device, string, len);
if (ret<0 && errno==EAGAIN) {
- usleep(1000);
+ debug ("read(): EAGAIN");
+ usleep(10000);
ret=read (Device, string, len);
}
debug ("read(%s)=%d", string, ret);
@@ -139,7 +143,7 @@ static int CW_read(char *string, int len)
error("Cwlinux: read() failed: %s", strerror(errno));
}
- usleep(DELAY);
+ usleep(20);
return ret;
}
@@ -148,14 +152,12 @@ static int CW_read(char *string, int len)
static void CW_Goto(int row, int col)
{
char cmd[5]="\376Gxy\375";
-
cmd[2]=(char)col;
cmd[3]=(char)row;
CW_write(cmd,5);
- usleep(DELAY);
-
}
+
static void CW_define_char (int ascii, char *buffer)
{
int i, j;
@@ -175,7 +177,6 @@ static void CW_define_char (int ascii, char *buffer)
}
}
CW_write(cmd,10);
- usleep(DELAY);
}
int CW_clear(void)
@@ -190,12 +191,49 @@ int CW_clear(void)
bar_clear();
+#if 0
CW_write("\376X\375",3);
- usleep(1000);
+#else
+ // for some mysterious reason, we have to sleep after
+ // the command _and_ after the CMD_END...
+ usleep(20);
+ CW_write("\376X",2);
+ usleep(20);
+ CW_write("\375",1);
+ usleep(20);
+#endif
return 0;
}
+
+static void CW_Brightness(void)
+{
+ int level;
+ char cmd[5]="\376A_\375";
+
+ level=atoi(cfg_get("Brightness","8"));
+ if (level<0) level=0;
+ if (level>8) level=8;
+
+ switch (level) {
+ case 0:
+ // backlight off
+ CW_write ("\376F\375", 3);
+ break;
+ case 8:
+ // backlight on
+ CW_write ("\376B\375", 3);
+ break;
+ default:
+ // backlight level
+ cmd[2]=level;
+ CW_write (cmd, 4);
+ break;
+ }
+}
+
+
int CW_init(LCD * Self)
{
char *port;
@@ -236,33 +274,36 @@ int CW_init(LCD * Self)
if (Device == -1)
return -1;
+#if 0
// read firmware version
CW_read(buffer,sizeof(buffer));
- CW_write ("\3761\375", 3);
+ usleep(100000);
+ CW_write ("\3761", 2);
+ usleep(100000);
+ CW_write ("\375", 1);
+ usleep(100000);
if (CW_read(buffer,2)!=2) {
info ("unable to read firmware version!");
- } else {
- info ("Cwlinux Firmware %d.%d", (int)buffer[0], (int)buffer[1]);
}
info ("Cwlinux Firmware %d.%d", (int)buffer[0], (int)buffer[1]);
+#endif
CW_clear();
// auto line wrap off
CW_write ("\376D\375", 3);
- usleep(DELAY);
// auto scroll off
CW_write ("\376R\375", 3);
- usleep(DELAY);
// underline cursor off
CW_write ("\376K\375", 3);
- usleep(DELAY);
// backlight on
CW_write ("\376B\375", 3);
- usleep(DELAY);
+
+ // backlight brightness
+ CW_Brightness();
bar_init(Lcd.rows, Lcd.cols, XRES, YRES, CHARS);
bar_add_segment( 0, 0,255, 32); // ASCII 32 = blank
@@ -309,7 +350,6 @@ int CW_flush(void)
if (Txt[row][col] == '\t')
continue;
CW_Goto(row, col);
- usleep(DELAY);
for (p = buffer; col < Lcd.cols; col++, p++) {
if (Txt[row][col] == '\t')
break;