diff options
Diffstat (limited to 'MatrixOrbital.c')
| -rw-r--r-- | MatrixOrbital.c | 109 |
1 files changed, 73 insertions, 36 deletions
diff --git a/MatrixOrbital.c b/MatrixOrbital.c index 822fec6..7cd32f1 100644 --- a/MatrixOrbital.c +++ b/MatrixOrbital.c @@ -1,4 +1,4 @@ -/* $Id: MatrixOrbital.c,v 1.28 2003/07/24 04:48:09 reinelt Exp $ +/* $Id: MatrixOrbital.c,v 1.29 2003/08/16 07:31:35 reinelt Exp $ * * driver for Matrix Orbital serial display modules * @@ -20,6 +20,9 @@ * * * $Log: MatrixOrbital.c,v $ + * Revision 1.29 2003/08/16 07:31:35 reinelt + * double buffering in all drivers + * * Revision 1.28 2003/07/24 04:48:09 reinelt * 'soft clear' needed for virtual rows * @@ -170,9 +173,10 @@ static LCD Lcd; static char *Port=NULL; static speed_t Speed; static int Device=-1; +static int GPO; -static char Txt[4][40]; -static int GPO; +static char *FrameBuffer1=NULL; +static char *FrameBuffer2=NULL; static int MO_open (void) @@ -247,31 +251,28 @@ static void MO_define_char (int ascii, char *buffer) static int MO_clear (int protocol) { - int row, col, gpo; - - for (row=0; row<Lcd.rows; row++) { - for (col=0; col<Lcd.cols; col++) { - Txt[row][col]='\t'; - } - } - + int gpo; + + memset (FrameBuffer1, ' ', Lcd.rows*Lcd.cols*sizeof(char)); bar_clear(); - GPO=0; - switch (protocol) { - case 1: - MO_write ("\014", 1); // Clear Screen - MO_write ("\376V", 2); // GPO off - break; - case 2: - MO_write ("\376\130", 2); // Clear Screen - for (gpo=1; gpo<=Lcd.gpos; gpo++) { - char cmd[3]="\376V"; - cmd[2]=(char)gpo; - MO_write (cmd, 3); // GPO off + if (protocol) { + memset (FrameBuffer2, ' ', Lcd.rows*Lcd.cols*sizeof(char)); + switch (protocol) { + case 1: + MO_write ("\014", 1); // Clear Screen + MO_write ("\376V", 2); // GPO off + break; + case 2: + MO_write ("\376\130", 2); // Clear Screen + for (gpo=1; gpo<=Lcd.gpos; gpo++) { + char cmd[3]="\376V"; + cmd[2]=(char)gpo; + MO_write (cmd, 3); // GPO off + } + break; } - break; } return 0; @@ -295,6 +296,14 @@ static int MO_init (LCD *Self, int protocol) Lcd=*Self; + // Init the framebuffers + FrameBuffer1 = (char*)malloc(Lcd.cols*Lcd.rows*sizeof(char)); + FrameBuffer2 = (char*)malloc(Lcd.cols*Lcd.rows*sizeof(char)); + if (FrameBuffer1==NULL || FrameBuffer2==NULL) { + error ("MatrixOrbital: framebuffer could not be allocated: malloc() failed"); + return -1; + } + if (Port) { free (Port); Port=NULL; @@ -359,10 +368,18 @@ int MO_init2 (LCD *Self) } +void MO_goto (int row, int col) +{ + char cmd[5]="\376Gyx"; + cmd[2]=(char)col+1; + cmd[3]=(char)row+1; + MO_write(cmd,4); +} + int MO_put (int row, int col, char *text) { - char *p=&Txt[row][col]; + char *p=FrameBuffer1+row*Lcd.cols+col; char *t=text; while (*t && col++<=Lcd.cols) { @@ -394,30 +411,37 @@ int MO_gpo (int num, int val) static int MO_flush (int protocol) { - char buffer[256]="\376G"; - char *p; - int c, row, col, gpo; + int row, col, pos1, pos2; + int c, equal; + int gpo; bar_process(MO_define_char); for (row=0; row<Lcd.rows; row++) { - buffer[3]=row+1; for (col=0; col<Lcd.cols; col++) { c=bar_peek(row, col); if (c!=-1) { - Txt[row][col]=(char)c; + FrameBuffer1[row*Lcd.cols+col]=(char)c; } } for (col=0; col<Lcd.cols; col++) { - if (Txt[row][col]=='\t') continue; - buffer[2]=col+1; - for (p=buffer+4; col<Lcd.cols; col++, p++) { - if (Txt[row][col]=='\t') break; - *p=Txt[row][col]; + if (FrameBuffer1[row*Lcd.cols+col]==FrameBuffer2[row*Lcd.cols+col]) continue; + MO_goto (row, col); + for (pos1=col++, pos2=pos1, equal=0; col<Lcd.cols; col++) { + if (FrameBuffer1[row*Lcd.cols+col]==FrameBuffer2[row*Lcd.cols+col]) { + // If we find just one equal byte, we don't break, because this + // would require a goto, which takes one byte, too. + if (++equal>5) break; + } else { + pos2=col; + equal=0; + } } - MO_write (buffer, p-buffer); + MO_write (FrameBuffer1+row*Lcd.cols+pos1, pos2-pos1+1); } } + + memcpy (FrameBuffer2, FrameBuffer1, Lcd.rows*Lcd.cols*sizeof(char)); switch (protocol) { case 1: @@ -453,9 +477,22 @@ int MO_flush2 (void) int MO_quit (void) { + info("MatrixOrbital: shutting down."); + debug ("closing port %s", Port); close (Device); unlock_port(Port); + + if (FrameBuffer1) { + free(FrameBuffer1); + FrameBuffer1=NULL; + } + + if (FrameBuffer2) { + free(FrameBuffer2); + FrameBuffer2=NULL; + } + return (0); } |