aboutsummaryrefslogtreecommitdiffstats
path: root/lcd2041.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--lcd2041.c314
1 files changed, 0 insertions, 314 deletions
diff --git a/lcd2041.c b/lcd2041.c
deleted file mode 100644
index 8abee97..0000000
--- a/lcd2041.c
+++ /dev/null
@@ -1,314 +0,0 @@
-#include <stdlib.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <termios.h>
-#include <fcntl.h>
-#include <string.h>
-#include <errno.h>
-
-#include "lcd2041.h"
-
-#define BAR_HORI 1
-#define BAR_VERT 2
-#define BAR_DUAL 3
-
-static int lcd;
-static char *lcd_device=NULL;
-static int bar_mode=0;
-
-typedef struct {
- int l1;
- int l2;
- int chr;
-} SEGMENT;
-
-typedef struct {
- int l1;
- int l2;
- int lru;
-} CHARACTER;
-
-static SEGMENT Segment[COLS+1][ROWS+1];
-static CHARACTER Character[CHAR];
-
-static int lcd_open(void)
-{
- int fd;
- struct termios portset;
-
- fd = open(lcd_device, O_RDWR | O_NOCTTY | O_NDELAY);
- if (fd==-1) {
- fprintf (stderr, "open(%s) failed: %s\n", lcd_device, strerror(errno));
- return -1;
- }
- if (tcgetattr(fd, &portset)==-1) {
- fprintf (stderr, "tcgetattr(%s) failed: %s\n", lcd_device, strerror(errno));
- return -1;
- }
- cfmakeraw(&portset);
- cfsetospeed(&portset, B19200);
- if (tcsetattr(fd, TCSANOW, &portset)==-1) {
- fprintf (stderr, "tcsetattr(%s) failed: %s\n", lcd_device, strerror(errno));
- return -1;
- }
- return fd;
-}
-
-
-static void lcd_write (char *string, int len)
-{
- if (lcd==-1) return;
- if (write (lcd, string, len)==-1) {
- if (errno==EAGAIN) {
- usleep(1000);
- if (write (lcd, string, len)>=0) return;
- }
- fprintf (stderr, "write(%s) failed: %s\n", lcd_device, strerror(errno));
- }
-}
-
-
-void lcd_clear (void)
-{
- lcd_write ("\014", 1);
-}
-
-
-void lcd_put (int x, int y, char *string)
-{
- char buffer[256];
- snprintf (buffer, sizeof(buffer), "\376G%c%c%s", x, y, string);
- lcd_write (buffer, strlen(buffer));
-}
-
-void lcd_hbar (int x, int y, int dir, int max, int len)
-{
- char buffer[COLS+5];
- char *p;
-
- if (bar_mode!=BAR_HORI) {
- lcd_write ("\376h", 2);
- bar_mode=BAR_HORI;
- }
-
- if (len<1) len=1;
- else if (len>max) len=max;
- if (dir!=0) len=max-len;
-
- snprintf (buffer, sizeof(buffer), "\376G%c%c", x, y);
- p=buffer+4;
-
- while (max>0 && p-buffer<sizeof(buffer)) {
- if (len==0) {
- *p=dir?255:32;
- } else if (len>=XRES) {
- *p=dir?32:255;
- len-=XRES;
- } else {
- *p=dir?8-len:len-1;
- len=0;
- }
- max-=XRES;
- p++;
- }
- lcd_write (buffer, p-buffer);
-}
-
-
-void lcd_vbar (int x, int y, int dir, int max, int len)
-{
- char buffer[6];
- unsigned char c;
-
- if (bar_mode!=BAR_VERT) {
- lcd_write ("\376v", 2);
- bar_mode=BAR_VERT;
- }
-
- if (len<1) len=1;
- else if (len>max) len=max;
-
- while (max>0 && y>0) {
- if (len==0) {
- c=32;
- } else if (len>=XRES) {
- c=255;
- len-=XRES;
- } else {
- c=len;
- len=0;
- }
- snprintf (buffer, sizeof(buffer), "\376G%c%c%c", x, y, c);
- lcd_write (buffer, 5);
- max-=XRES;
- y--;
- }
-}
-
-
-static void lcd_dbar_init (void)
-{
- int x, y;
-
- bar_mode=BAR_DUAL;
-
- for (x=0; x<CHAR; x++) {
- Character[x].l1=-1;
- Character[x].l2=-1;
- Character[x].lru=0;
- }
-
- for (x=0; x<COLS; x++) {
- for (y=0; y<ROWS; y++) {
- Segment[x][y].l1=-1;
- Segment[x][y].l2=-1;
- }
- }
-}
-
-static int lcd_dbar_char (int l1, int l2)
-{
- int i, j, min;
-
- if (l1==127) l1=0;
- if (l2==127) l2=0;
-
- if (l1==0 && l2==0) return 32;
- if (l1==XRES && l2==XRES) return 255;
-
- for (i=0; i<CHAR; i++) {
- if (Character[i].l1==l1 && Character[i].l2==l2) {
- Character[i].lru=2;
- return i;
- }
- }
-
- for (i=0; i<CHAR; i++) {
- if (Character[i].lru==0) {
- printf ("creating char %d (%d/%d)\n", i, l1, l2);
- Character[i].l1=l1;
- Character[i].l2=l2;
- Character[i].lru=2;
- return i;
- }
- }
-
- min=XRES*YRES;
- for (i=0; i<CHAR; i++) {
- int diff;
- if (l1==0 && Character[i].l1!=0) continue;
- if (l2==0 && Character[i].l2!=0) continue;
- if (l1==XRES && Character[i].l1!=XRES) continue;
- if (l2==XRES && Character[i].l2!=XRES) continue;
- diff=abs(Character[i].l1-l1)+abs(Character[i].l2-l2);
- if (diff<min) {
- min=diff;
- j=i;
- }
- }
- printf ("lcd_dbar: diff=%d\n", min);
- return j;
-}
-
-void lcd_dbar (int x, int y, int dir, int max, int len1, int len2)
-{
- if (bar_mode!=BAR_DUAL)
- lcd_dbar_init();
-
- if (len1<1) len1=1;
- else if (len1>max) len1=max;
-
- if (len2<1) len2=1;
- else if (len2>max) len2=max;
-
- while (max>0 && x<=COLS) {
- if (len1==0) {
- Segment[x][y].l1=0;
- } else if (len1>=XRES) {
- Segment[x][y].l1=XRES;
- len1-=XRES;
- } else {
- Segment[x][y].l1=len1;
- len1=0;
- }
- if (len2==0) {
- Segment[x][y].l2=0;
- } else if (len2>=XRES) {
- Segment[x][y].l2=XRES;
- len2-=XRES;
- } else {
- Segment[x][y].l2=len2;
- len2=0;
- }
- max-=XRES;
- x++;
- }
-}
-
-void lcd_dbar_flush (void)
-{
- int i, x, y;
-
- for (y=0; y<=ROWS; y++) {
- for (x=0; x<=COLS; x++) {
- if ((Segment[x][y].l1==0 && Segment[x][y].l2==XRES) || (Segment[x][y].l1==XRES && Segment[x][y].l2==0))
- Segment[x][y].chr=lcd_dbar_char(Segment[x][y].l1, Segment[x][y].l2);
- }
- }
- for (y=0; y<=ROWS; y++) {
- for (x=0; x<=COLS; x++) {
- if (Segment[x][y].l1!=-1 || Segment[x][y].l2!=-1)
- Segment[x][y].chr=lcd_dbar_char(Segment[x][y].l1, Segment[x][y].l2);
- }
- }
-
- for (i=0; i<CHAR; i++) {
- if (Character[i].lru==2) {
- char buffer[12];
- char pixel[XRES+1]={0, 16, 24, 28, 30, 31};
- char p0=pixel[Character[i].l1];
- char p1=pixel[Character[i].l2];
- snprintf (buffer, sizeof(buffer), "\376N%c%c%c%c%c%c%c%c%c", i, p0, p0, p0, p0, p1, p1, p1, p1);
- lcd_write (buffer, 11);
- }
- if (Character[i].lru>0)
- Character[i].lru--;
- }
-
- for (y=0; y<=ROWS; y++) {
- for (x=0; x<=COLS; x++) {
- if (Segment[x][y].l1!=-1 || Segment[x][y].l2!=-1) {
- char buffer[6];
- snprintf (buffer, sizeof(buffer), "\376G%c%c%c", x, y, Segment[x][y].chr);
- lcd_write (buffer, 5);
- }
- }
- }
-}
-
-
-int lcd_init (char *device)
-{
- if (lcd_device) free (lcd_device);
- lcd_device=strdup(device);
- lcd=lcd_open();
- if (lcd==-1) return -1;
-
- lcd_clear();
- lcd_write ("\376B", 3); // backlight on
- lcd_write ("\376K", 2); // cursor off
- lcd_write ("\376T", 2); // blink off
- lcd_write ("\376D", 2); // line wrapping off
- lcd_write ("\376R", 2); // auto scroll off
- lcd_write ("\376V", 2); // GPO off
-
- return 0;
-}
-
-void lcd_contrast (int contrast)
-{
- char buffer[4];
- snprintf (buffer, 4, "\376P%c", contrast);
- lcd_write (buffer, 3);
-}
-
generated by cgit v1.2.3 (git 2.39.1) at 2025-03-06 02:23:50 +0000