-/* $Id: Cwlinux.c,v 1.2 2002/09/11 05:32:35 reinelt Exp $
+/* $Id: Cwlinux.c,v 1.3 2002/09/12 05:24:54 reinelt Exp $
*
* driver for Cwlinux serial display modules
*
*
*
* $Log: Cwlinux.c,v $
+ * Revision 1.3 2002/09/12 05:24:54 reinelt
+ * code cleanup, character defining for bars
+ *
* Revision 1.2 2002/09/11 05:32:35 reinelt
* changed to use new bar functions
*
static char Txt[4][20];
-static int nSegment = 2;
-static SEGMENT Segment[128] = { {len1: 0, len2: 0, type: 255, \
- used: 0, ascii:32} };
-
-static int Read_LCD(int fd, char *c, int size)
-{
- int rc;
-
- rc = read(fd, c, size);
- usleep(DELAY);
- return rc;
-}
-
-static int Write_LCD(int fd, char *c, int size)
-{
- int rc;
-
- rc = write(fd, c, size);
- usleep(DELAY);
- return rc;
-}
-
-
-static void Enable_Cursor(int fd)
-{
- char c;
- int rc;
-
- c = LCD_CMD;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_ENABLE_CURSOR;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_CMD_END;
- rc = Write_LCD(fd, &c, 1);
-}
-
-static void Disable_Cursor(int fd)
-{
- char c;
- int rc;
-
- c = LCD_CMD;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_DISABLE_CURSOR;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_CMD_END;
- rc = Write_LCD(fd, &c, 1);
-}
-
-static void Clear_Screen(int fd)
-{
- char c;
- int rc;
-
- c = LCD_CMD;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_CLEAR;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_CMD_END;
- rc = Write_LCD(fd, &c, 1);
-}
-
-static void Enable_Wrap(int fd)
-{
- char c;
- int rc;
-
- c = LCD_CMD;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_ENABLE_WRAP;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_CMD_END;
- rc = Write_LCD(fd, &c, 1);
-}
-
-static void Init_Port(fd)
-{
- /* Posix - set baudrate to 0 and back */
- struct termios tty, old;
-
- tcgetattr(fd, &tty);
- tcgetattr(fd, &old);
- cfsetospeed(&tty, B0);
- cfsetispeed(&tty, B0);
- tcsetattr(fd, TCSANOW, &tty);
- usleep(SETUP_DELAY);
- tcsetattr(fd, TCSANOW, &old);
-}
-
-static void Setup_Port(int fd, speed_t speed)
-{
- struct termios portset;
-
- tcgetattr(fd, &portset);
- cfsetospeed(&portset, speed);
- cfsetispeed(&portset, speed);
- portset.c_iflag = IGNBRK;
- portset.c_lflag = 0;
- portset.c_oflag = 0;
- portset.c_cflag |= CLOCAL | CREAD;
- portset.c_cflag &= ~CRTSCTS;
- portset.c_cc[VMIN] = 1;
- portset.c_cc[VTIME] = 5;
- tcsetattr(fd, TCSANOW, &portset);
-}
-
-static void Set_9600(int fd)
-{
- char c;
- int rc;
-
- c = LCD_CMD;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_SET_BAUD;
- rc = Write_LCD(fd, &c, 1);
- c = 0x20;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_CMD_END;
- rc = Write_LCD(fd, &c, 1);
-}
-
-static void Set_19200(int fd)
-{
- char c;
- int rc;
-
- c = LCD_CMD;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_SET_BAUD;
- rc = Write_LCD(fd, &c, 1);
- c = 0xf;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_CMD_END;
- rc = Write_LCD(fd, &c, 1);
-}
-
-static int Write_Line_LCD(int fd, char *buf, int size)
-{
- int i;
- char c;
- int isEnd = 0;
- int rc;
-
- for (i = 0; i < size; i++) {
- if (buf[i] == '\0') {
- isEnd = 1;
- }
- if (isEnd) {
- c = ' ';
- } else {
- c = buf[i];
- }
- rc = Write_LCD(fd, &c, 1);
- }
- printf("%s\n", buf);
- return 0;
-}
-
-static void Set_Insert(int fd, int row, int col)
-{
- char c;
- int rc;
-
- c = LCD_CMD;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_SET_INSERT;
- rc = Write_LCD(fd, &c, 1);
- c = col;
- rc = Write_LCD(fd, &c, 1);
- c = row;
- rc = Write_LCD(fd, &c, 1);
- c = LCD_CMD_END;
- rc = Write_LCD(fd, &c, 1);
-}
-
-static void CwLnx_backlight(int on)
-{
- static int current = -1;
- int realbacklight = -1;
- char c;
- int rc;
-
- if (on == current)
- return;
-
- /* validate backlight value */
- if (on > 255)
- on = 255;
- if (on < 0)
- on = 0;
-
- current = on;
-
- realbacklight = (int) (current * 100 / 255);
-
- c = LCD_CMD;
- rc = Write_LCD(Device, &c, 1);
- c = LCD_LIGHT_ON;
- rc = Write_LCD(Device, &c, 1);
- c = LCD_CMD_END;
- rc = Write_LCD(Device, &c, 1);
-}
-
-static void CwLnx_linewrap(int on)
+static int CwLnx_open(void)
{
- char out[4];
+ int fd;
+ pid_t pid;
+ struct termios portset;
- if (on)
- snprintf(out, sizeof(out), "%c", 23);
+ if ((pid = lock_port(Port)) != 0) {
+ if (pid == -1)
+ error("Cwlinux: port %s could not be locked", Port);
else
- snprintf(out, sizeof(out), "%c", 24);
- Enable_Wrap(Device);
-}
-
-static void CwLnx_autoscroll(int on)
-{
- return;
-}
-
-static void CwLnx_hidecursor()
-{
- return;
-}
-
-static int CwLnx_open(void)
-{
- int fd;
- pid_t pid;
- struct termios portset;
-
- if ((pid = lock_port(Port)) != 0) {
- if (pid == -1)
- error("Cwlinux: port %s could not be locked", Port);
- else
- error("Cwlinux: port %s is locked by process %d", Port, pid);
- return -1;
- }
- fd = open(Port, O_RDWR | O_NOCTTY | O_NDELAY);
- if (fd == -1) {
- error("Cwlinux: open(%s) failed: %s", Port, strerror(errno));
- unlock_port(Port);
- return -1;
- }
- if (tcgetattr(fd, &portset) == -1) {
- error("Cwlinux: tcgetattr(%s) failed: %s", Port, strerror(errno));
- unlock_port(Port);
- return -1;
- }
- cfmakeraw(&portset);
- cfsetospeed(&portset, Speed);
- if (tcsetattr(fd, TCSANOW, &portset) == -1) {
- error("Cwlinux: tcsetattr(%s) failed: %s", Port, strerror(errno));
- unlock_port(Port);
- return -1;
- }
- return fd;
+ error("Cwlinux: port %s is locked by process %d", Port, pid);
+ return -1;
+ }
+ fd = open(Port, O_RDWR | O_NOCTTY | O_NDELAY);
+ if (fd == -1) {
+ error("Cwlinux: open(%s) failed: %s", Port, strerror(errno));
+ unlock_port(Port);
+ return -1;
+ }
+ if (tcgetattr(fd, &portset) == -1) {
+ error("Cwlinux: tcgetattr(%s) failed: %s", Port, strerror(errno));
+ unlock_port(Port);
+ return -1;
+ }
+ cfmakeraw(&portset);
+ cfsetospeed(&portset, Speed);
+ if (tcsetattr(fd, TCSANOW, &portset) == -1) {
+ error("Cwlinux: tcsetattr(%s) failed: %s", Port, strerror(errno));
+ unlock_port(Port);
+ return -1;
+ }
+ return fd;
}
static void CwLnx_write(char *string, int len)
{
- if (Device == -1)
- return;
-
- if (Write_Line_LCD(Device, string, len) < 0) {
- error("Cwlinux: write(%s) failed: %s", Port, strerror(errno));
+ if (write (Device, string, len)==-1) {
+ if (errno==EAGAIN) {
+ usleep(1000);
+ if (write (Device, string, len)>=0) return;
}
-}
+ error ("Cwlinux: write(%s) failed: %s", Port, strerror(errno));
+ }
-static int CwLnx_contrast(void)
-{
- return 0;
+ // Fixme: Why?
+ // usleep(DELAY);
}
-static void CwLnx_set_char(int n, char *dat)
+static void CwLnx_Goto(int row, int col)
{
- int row, col;
- char letter;
- char c;
- int rc;
-
- if (n < 1 || n > 8)
- return;
- if (!dat)
- return;
-
- c = LCD_CMD;
- rc = Write_LCD(Device, &c, 1);
- c = LCD_SETCHAR;
- rc = Write_LCD(Device, &c, 1);
- c = (char)n;
- rc = Write_LCD(Device, &c, 1);
-
- for (col = 0; col < 6; col++) {
- letter = 0;
- for (row = 0; row < 8; row++) {
- letter <<= 1;
- letter |= (dat[(col * 8) + row] > 0);
- }
- Write_LCD(Device, &letter, 1);
- }
- c = LCD_CMD_END;
- rc = Write_LCD(Device, &c, 1);
+ char cmd[5];
+
+ cmd[0]=LCD_CMD;
+ cmd[1]=LCD_SET_INSERT;
+ cmd[2]=(char)col;
+ cmd[3]=(char)row;
+ cmd[4]=LCD_CMD_END;
+
+ CwLnx_write(cmd,5);
}
-static void CwLnx_define_chars(void)
+static void CwLnx_define_char (int ascii, char *buffer)
{
- int c, i, j, m, n;
- char buffer[48];
- char Pixelr[] = { 1, 9, 17, 25, 33, 41 };
- char Pixell[] = { 40, 32, 24, 16, 8, 0 };
-
- for (i = 2; i < nSegment; i++) {
- if (Segment[i].used)
- continue;
- if (Segment[i].ascii != -1)
- continue;
- for (c = 1; c < CHARS; c++) {
- for (j = 2; j < nSegment; j++) {
- if (Segment[j].ascii == c)
- break;
- }
- if (j == nSegment)
- break;
- }
- Segment[i].ascii = c;
- memset(buffer, 0, 48);
- switch (Segment[i].type) {
- case BAR_L:
- for (n = 0; n < Segment[i].len1 - 1; n++) {
- for (m = 0; m < 4; m++) {
- buffer[Pixell[n] + 4 + m] = 1;
- }
- }
- for (n = 0; n < Segment[i].len2 - 1; n++) {
- for (m = 0; m < 4; m++) {
- buffer[Pixell[n] + 0 + m] = 1;
- }
- }
- break;
- case BAR_R:
- for (n = 0; n < Segment[i].len1; n++) {
- for (m = 0; m < 3; m++) {
- buffer[Pixelr[n] + 4 + m] = 1;
- }
- }
- for (n = 0; n < Segment[i].len2; n++) {
- for (m = 0; m < 3; m++) {
- buffer[Pixelr[n] + 0 + m] = 1;
- }
- }
- break;
- case BAR_U:
- for (j = 0; j < Segment[i].len1; j++) {
- for (m = 0; m < 3; m++) {
- buffer[j + m * 8] = 1;
- }
- }
- for (j = 0; j < Segment[i].len2; j++) {
- for (m = 0; m < 3; m++) {
- buffer[j + m * 8 + 16] = 1;
- }
- }
- break;
- case BAR_D:
- for (j = 0; j < Segment[i].len1; j++) {
- for (m = 0; m < 3; m++) {
- buffer[7 - j + m * 8] = 1;
- }
- }
- for (j = 0; j < Segment[i].len2; j++) {
- for (m = 0; m < 3; m++) {
- buffer[7 - j + m * 8 + 16] = 1;
- }
- }
- break;
- }
- CwLnx_set_char(c, buffer);
+ char cmd[10];
+ int i, j;
+
+ cmd[0]=LCD_CMD;
+ cmd[1]=LCD_SETCHAR;
+ cmd[2]=(char)ascii;
+
+ // Cwlinux uses a vertical bitmap layout, so
+ // we have to kind of 'rotate' the bitmap.
+
+ for (i=0; i<6;i++) {
+ cmd[3+i]=0;
+ for (j=0; j<8;j++) {
+ if (buffer[j] & (1<<(5-i))) {
+ cmd[3+i]|=(1<<j);
+ }
}
+ }
+ cmd[10]=LCD_CMD_END;
+ CwLnx_write(cmd,10);
}
int CwLnx_clear(void)
{
- int row, col;
- for (row = 0; row < Lcd.rows; row++) {
- for (col = 0; col < Lcd.cols; col++) {
- Txt[row][col] = '\t';
- }
+ char cmd[3];
+
+ int row, col;
+ for (row = 0; row < Lcd.rows; row++) {
+ for (col = 0; col < Lcd.cols; col++) {
+ Txt[row][col] = '\t';
}
+ }
- bar_clear();
+ bar_clear();
- Clear_Screen(Device);
- return 0;
+ cmd[0]=LCD_CMD;
+ cmd[1]=LCD_CLEAR;
+ cmd[2]=LCD_CMD_END;
+ CwLnx_write(cmd,3);
+
+ return 0;
}
int CwLnx_init(LCD * Self)
{
- char *port;
- char *speed;
-
- Lcd = *Self;
-
- if (Port) {
- free(Port);
- Port = NULL;
- }
-
- port = cfg_get("Port");
- if (port == NULL || *port == '\0') {
- error("Cwlinux: no 'Port' entry in %s", cfg_file());
- return -1;
- }
- Port = strdup(port);
-
- speed = cfg_get("Speed") ? : "19200";
-
- switch (atoi(speed)) {
- case 1200:
- Speed = B1200;
- break;
- case 2400:
- Speed = B2400;
- break;
- case 9600:
- Speed = B9600;
- break;
- case 19200:
- Speed = B19200;
- break;
- default:
- error("Cwlinux: unsupported speed '%s' in %s", speed, cfg_file());
- return -1;
- }
-
- debug("using port %s at %d baud", Port, atoi(speed));
-
- Device = CwLnx_open();
- if (Device == -1)
- return -1;
-
- bar_init(Lcd.rows, Lcd.cols, XRES, YRES, CHARS);
- bar_add_segment( 0, 0,255, 32); // ASCII 32 = blank
- bar_add_segment(255,255,255,255); // ASCII 255 = block
+ char *port;
+ char *speed;
+ char cmd[3];
+
+ Lcd = *Self;
+
+ if (Port) {
+ free(Port);
+ Port = NULL;
+ }
+
+ port = cfg_get("Port");
+ if (port == NULL || *port == '\0') {
+ error("Cwlinux: no 'Port' entry in %s", cfg_file());
+ return -1;
+ }
+ Port = strdup(port);
+
+ speed = cfg_get("Speed") ? : "19200";
+
+ switch (atoi(speed)) {
+ case 1200:
+ Speed = B1200;
+ break;
+ case 2400:
+ Speed = B2400;
+ break;
+ case 9600:
+ Speed = B9600;
+ break;
+ case 19200:
+ Speed = B19200;
+ break;
+ default:
+ error("Cwlinux: unsupported speed '%s' in %s", speed, cfg_file());
+ return -1;
+ }
+
+ debug("using port %s at %d baud", Port, atoi(speed));
+
+ Device = CwLnx_open();
+ if (Device == -1)
+ return -1;
+
+ bar_init(Lcd.rows, Lcd.cols, XRES, YRES, CHARS);
+ bar_add_segment( 0, 0,255, 32); // ASCII 32 = blank
+ bar_add_segment(255,255,255,255); // ASCII 255 = block
- CwLnx_clear();
- CwLnx_contrast();
-
- CwLnx_backlight(1);
- CwLnx_hidecursor(0);
- CwLnx_linewrap(0);
- CwLnx_autoscroll(0);
-
- return 0;
+ CwLnx_clear();
+
+ // turn backlight on
+ cmd[0]=LCD_CMD;
+ cmd[1]=LCD_LIGHT_ON;
+ cmd[2]=LCD_CMD_END;
+ CwLnx_write(cmd,3);
+
+ // Fixme:
+ // enable (disable?) linewrap
+ cmd[0]=LCD_CMD;
+ cmd[1]=LCD_ENABLE_WRAP;
+ cmd[2]=LCD_CMD_END;
+ CwLnx_write(cmd,3);
+
+ return 0;
}
int CwLnx_put(int row, int col, char *text)
{
- char *p = &Txt[row][col];
- char *t = text;
+ char *p = &Txt[row][col];
+ char *t = text;
- while (*t && col++ <= Lcd.cols) {
- *p++ = *t++;
- }
- return 0;
+ while (*t && col++ <= Lcd.cols) {
+ *p++ = *t++;
+ }
+ return 0;
}
int CwLnx_bar(int type, int row, int col, int max, int len1, int len2)
int CwLnx_flush(void)
{
- char buffer[256];
- char *p;
- int c, row, col;
-
- bar_process(CwLnx_define_char);
-
- for (row = 0; row < Lcd.rows; row++) {
- for (col = 0; col < Lcd.cols; col++) {
- c=bar_peek(row, col);
- if (c!=-1) {
- Txt[row][col]=(char)c;
- }
- }
- Set_Insert(Device, row, col);
- for (col = 0; col < Lcd.cols; col++) {
- if (Txt[row][col] == '\t')
- continue;
- Set_Insert(Device, row, col);
- for (p = buffer; col < Lcd.cols; col++, p++) {
- if (Txt[row][col] == '\t')
- break;
- *p = Txt[row][col];
- }
- CwLnx_write(buffer, p - buffer);
- }
+ char buffer[256];
+ char *p;
+ int c, row, col;
+
+ bar_process(CwLnx_define_char);
+
+ for (row = 0; row < Lcd.rows; row++) {
+ for (col = 0; col < Lcd.cols; col++) {
+ c=bar_peek(row, col);
+ if (c!=-1) {
+ Txt[row][col]=(char)c;
+ }
}
- return 0;
+ for (col = 0; col < Lcd.cols; col++) {
+ if (Txt[row][col] == '\t')
+ continue;
+ CwLnx_Goto(row, col);
+ for (p = buffer; col < Lcd.cols; col++, p++) {
+ if (Txt[row][col] == '\t')
+ break;
+ *p = Txt[row][col];
+ }
+ CwLnx_write(buffer, p - buffer);
+ }
+ }
+ return 0;
}
int CwLnx_quit(void)
{
- debug("closing port %s", Port);
- close(Device);
- unlock_port(Port);
- return (0);
+ debug("closing port %s", Port);
+ close(Device);
+ unlock_port(Port);
+ return (0);
}
LCD Cwlinux[] = {
- {name: "CW12232",
- rows: 4,
- cols: 20,
- xres: XRES,
- yres: YRES,
- bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2,
- gpos: 0,
- init: CwLnx_init,
- clear: CwLnx_clear,
- put: CwLnx_put,
- bar: CwLnx_bar,
- gpo: NULL,
- flush: CwLnx_flush,
- quit: CwLnx_quit
- },
- {NULL}
+ {name: "CW12232",
+ rows: 4,
+ cols: 20,
+ xres: XRES,
+ yres: YRES,
+ bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2,
+ gpos: 0,
+ init: CwLnx_init,
+ clear: CwLnx_clear,
+ put: CwLnx_put,
+ bar: CwLnx_bar,
+ gpo: NULL,
+ flush: CwLnx_flush,
+ quit: CwLnx_quit
+ },
+ {NULL}
};
projects / lcd4linux.git / commitdiff