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authorreinelt <>2004-02-04 19:10:51 +0000
committerreinelt <>2004-02-04 19:10:51 +0000
commit1bff2d6d47cb73bee4d1dbefa657b61a9101b273 (patch)
tree0e46c5c68ddc67662cc997b123f3620530862e4f /drv_generic_serial.c
parent9a48211530fc9468e75585b46a376af88d1d3f06 (diff)
downloadlcd4linux-1bff2d6d47cb73bee4d1dbefa657b61a9101b273.tar.gz
[lcd4linux @ 2004-02-04 19:10:51 by reinelt]
Crystalfontz driver nearly finished
Diffstat (limited to 'drv_generic_serial.c')
-rw-r--r--drv_generic_serial.c33
1 files changed, 22 insertions, 11 deletions
diff --git a/drv_generic_serial.c b/drv_generic_serial.c
index de6a39a..56bbdb8 100644
--- a/drv_generic_serial.c
+++ b/drv_generic_serial.c
@@ -1,4 +1,4 @@
-/* $Id: drv_generic_serial.c,v 1.4 2004/02/01 08:05:12 reinelt Exp $
+/* $Id: drv_generic_serial.c,v 1.5 2004/02/04 19:10:51 reinelt Exp $
*
* generic driver helper for serial and usbserial displays
*
@@ -23,6 +23,9 @@
*
*
* $Log: drv_generic_serial.c,v $
+ * Revision 1.5 2004/02/04 19:10:51 reinelt
+ * Crystalfontz driver nearly finished
+ *
* Revision 1.4 2004/02/01 08:05:12 reinelt
* Crystalfontz 633 extensions (CRC checking and stuff)
* Models table for HD44780
@@ -54,8 +57,13 @@
* int drv_generic_serial_open (char *driver, char *port, speed_t speed);
* opens the serial port
*
+ * int drv_generic_serial_poll (char *string, int len)
+ * reads from the serial or USB port
+ * without retry
+ *
* int drv_generic_serial_read (char *string, int len);
* reads from the serial or USB port
+ * with retry
*
* void drv_generic_serial_write (char *string, int len);
* writes to the serial or USB port
@@ -285,8 +293,13 @@ int drv_generic_serial_open (char *section, char *driver)
int drv_generic_serial_poll (char *string, int len)
{
+ int ret;
if (Device==-1) return -1;
- return read (Device, string, len);
+ ret=read (Device, string, len);
+ if (ret<0 && errno!=EAGAIN) {
+ error("%s: read(%s) failed: %s", Driver, Port, strerror(errno));
+ }
+ return ret;
}
@@ -297,14 +310,12 @@ int drv_generic_serial_read (char *string, int len)
for (run=0; run<10; run++) {
ret=drv_generic_serial_poll(string, len);
if (ret>=0 || errno!=EAGAIN) break;
- debug ("read(): EAGAIN");
+ info ("%s: read(%s): EAGAIN", Driver, Port);
usleep(1000);
}
- if (ret<0) {
- error("%s: read(%s, %d) failed: %s", Driver, Port, len, strerror(errno));
- } else if (ret!=len) {
- error ("%s: partial read: len=%d ret=%d", Driver, len, ret);
+ if (ret>0 && ret!=len) {
+ error ("%s: partial read(%s): len=%d ret=%d", Driver, Port, len, ret);
}
return ret;
@@ -319,14 +330,14 @@ void drv_generic_serial_write (char *string, int len)
for (run=0; run<10; run++) {
ret=write (Device, string, len);
if (ret>=0 || errno!=EAGAIN) break;
- debug ("write(): EAGAIN");
+ info ("%s: write(%s): EAGAIN", Driver, Port);
usleep(1000);
}
if (ret<0) {
- error ("MatrixOrbital: write(%s) failed: %s", Port, strerror(errno));
+ error ("%s: write(%s) failed: %s", Driver, Port, strerror(errno));
} else if (ret!=len) {
- error ("MatrixOrbital: partial write: len=%d ret=%d", len, ret);
+ error ("%s: partial write(%s): len=%d ret=%d", Driver, Port, len, ret);
}
return;
@@ -335,7 +346,7 @@ void drv_generic_serial_write (char *string, int len)
int drv_generic_serial_close (void)
{
- debug ("%s: closing port %s", Driver, Port);
+ info ("%s: closing port %s", Driver, Port);
close (Device);
drv_generic_serial_unlock_port(Port);
return 0;