diff options
Diffstat (limited to 'Cwlinux.c')
| -rw-r--r-- | Cwlinux.c | 90 |
1 files changed, 65 insertions, 25 deletions
@@ -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; |