-/* $Id: drv_LPH7508.c,v 1.1 2005/11/04 14:10:38 reinelt Exp $
+/* $Id: drv_LPH7508.c,v 1.2 2005/12/13 14:07:28 reinelt Exp $
*
* driver for Pollin LPH7508
*
*
*
* $Log: drv_LPH7508.c,v $
+ * Revision 1.2 2005/12/13 14:07:28 reinelt
+ * LPH7508 driver finished
+ *
* Revision 1.1 2005/11/04 14:10:38 reinelt
* drv_Sample and drv_LPH7508
*
static void drv_L7_write_ctrl(const unsigned char data)
{
- /* Fixme: busy-check??? */
-
/* put data on DB1..DB8 */
drv_generic_parport_data(data);
/* CS1 = high, RW = low, A0 = low */
drv_generic_parport_control(SIGNAL_CS1 | SIGNAL_RW | SIGNAL_A0, SIGNAL_CS1);
- /* Fixme: setup time? */
- ndelay(100);
+ /* Address Setup Time = 10 ns */
+ /* Data Setup Time = 20 ns */
+ ndelay(20);
- /* Fixme: toggle time? */
- drv_generic_parport_toggle(SIGNAL_CS1, 0, 100);
+ /* Control L Pulse Width = 22 ns */
+ drv_generic_parport_toggle(SIGNAL_CS1, 0, 22);
- ndelay(100); // Fixme
+ /* Address & Data Hold Time = 10 ns */
+ ndelay(10);
}
static void drv_L7_write_data(const unsigned char data)
{
- /* Fixme: busy-check??? */
-
/* put data on DB1..DB8 */
drv_generic_parport_data(data);
/* CS1 = high, RW = low, A0 = high */
drv_generic_parport_control(SIGNAL_CS1 | SIGNAL_RW | SIGNAL_A0, SIGNAL_CS1 | SIGNAL_A0);
- /* Fixme: setup time? */
- ndelay(100);
+ /* Address Setup Time = 10 ns */
+ /* Data Setup Time = 20 ns */
+ ndelay(20);
- /* Fixme: toggle time? */
- drv_generic_parport_toggle(SIGNAL_CS1, 0, 100);
+ /* Control L Pulse Width = 22 ns */
+ drv_generic_parport_toggle(SIGNAL_CS1, 0, 22);
- ndelay(100); // Fixme
+ /* Address & Data Hold Time = 10 ns */
+ ndelay(10);
+}
+
+
+static void drv_L7_clear (void)
+{
+ int p, c;
+
+ for (p= 0; p < PAGES; p++) {
+ /* select page */
+ drv_L7_write_ctrl(0xb0 | p);
+ /* select column address */
+ drv_L7_write_ctrl(0x00);
+ drv_L7_write_ctrl(0x10);
+ for (c = 0; c < SCOLS; c++) {
+ drv_L7_write_data(0);
+ }
+ }
}
static void drv_L7_blit(const int row, const int col, const int height, const int width)
{
- int r, c;
+ int r, p, p0;
/* transfer layout to display framebuffer */
for (r = row; r < row + height; r++) {
if (r >= SROWS)
break;
- int p = r / 8; /* page */
+ /* page */
+ int p = r / 8;
+ int c;
for (c = col; c < col + width; c++) {
if (c >= SCOLS)
break;
- int a = p * SCOLS + c; /* RAM address */
- unsigned char m = 1 << (r % 8); /* bit mask */
+ /* RAM address */
+ int a = p * SCOLS + c;
+ /* bit mask */
+ unsigned char m = 1 << (r % 8);
if (drv_generic_graphic_FB[r * LCOLS + c]) {
/* set bit */
Buffer1[a] |= m;
}
/* process display framebuffer */
+ p0 = -1;
+ for (p = row / 8; p <= (row + height) / 8; p++) {
+ int i, j, a, e;
+ if (p >= PAGES)
+ break;
+ for (i = col; i < col+width; i++) {
+ a = p * SCOLS + i;
+ if (Buffer1[a] == Buffer2[a])
+ continue;
+ for (j = i, e = 0; i < col+width; i++) {
+ a = p * SCOLS + i;
+ if (Buffer1[a] == Buffer2[a]) {
+ if (++e > 2)
+ break;
+ } else {
+ e = 0;
+ }
+ }
+ /* change page if necessary */
+ if (p != p0) {
+ p0 = p;
+ drv_L7_write_ctrl(0xb0 | p);
+ }
+ /* column address */
+ /* first column address = 32 */
+ drv_L7_write_ctrl(0x00 | ((j + 32) & 0x0f));
+ drv_L7_write_ctrl(0x10 | ((j + 32) >> 4));
+ /* data */
+ for (j = j; j <= i - e; j++) {
+ a = p * SCOLS + j;
+ drv_L7_write_data(Buffer1[a]);
+ Buffer2[a] = Buffer1[a];
+ }
+ }
+ }
+}
+
+
+static int drv_L7_contrast(int contrast)
+{
+ if (contrast < 0)
+ contrast = 0;
+ if (contrast > 31)
+ contrast = 31;
+ drv_L7_write_ctrl(0x80 | contrast);
+
+ return contrast;
}
static int drv_L7_start(const char *section)
{
char *s;
+ int contrast;
/* fixed size */
DROWS = 64;
/* set direction: write */
drv_generic_parport_direction(0);
-
/* reset display: lower RESET for 1 usec */
drv_generic_parport_control(SIGNAL_RES, 0);
udelay(1);
drv_generic_parport_control(SIGNAL_RES, SIGNAL_RES);
- udelay(1);
+ udelay(100);
/* just to make sure: send a software reset */
drv_L7_write_ctrl(0xe2);
+ udelay(20000);
- /* initialize display */
+ drv_L7_write_ctrl(0xAE); /* Display off */
drv_L7_write_ctrl(0x40); /* Start Display Line = 0 */
- drv_L7_write_ctrl(0x20); /* reverse line driving release */
+ drv_L7_write_ctrl(0x20); /* reverse line driving off */
drv_L7_write_ctrl(0xCC); /* OutputStatus = $0C, 102x64 */
drv_L7_write_ctrl(0xA0); /* ADC = normal */
drv_L7_write_ctrl(0xA9); /* LCD-Duty = 1/64 */
drv_L7_write_ctrl(0xAB); /* LCD-Duty +1 (1/65, symbols) */
drv_L7_write_ctrl(0x25); /* power supply on */
- udelay(100);
+ udelay(100 * 1000); /* wait 100 msec */
drv_L7_write_ctrl(0xED); /* power supply on completion */
+ drv_L7_write_ctrl(0x8F); /* Contrast medium */
+ drv_L7_write_ctrl(0xA4); /* Display Test off */
+ drv_L7_write_ctrl(0xAF); /* Display on */
+ drv_L7_write_ctrl(0xA6); /* Display on */
/* clear display */
- /* Fixme drv_L7_clear(); */
+ drv_L7_clear();
+
+ if (cfg_number(section, "Contrast", 15, 0, 31, &contrast) > 0) {
+ drv_L7_contrast(contrast);
+ }
return 0;
}
/*** plugins ***/
/****************************************/
-/* none at the moment... */
+
+static void plugin_contrast(RESULT * result, RESULT * arg1)
+{
+ double contrast;
+
+ contrast = drv_L7_contrast(R2N(arg1));
+ SetResult(&result, R_NUMBER, &contrast);
+}
/****************************************/
widget_register(&wc);
/* register plugins */
- /* none at the moment... */
+ AddFunction("LCD::contrast", 1, plugin_contrast);
return 0;
projects / lcd4linux.git / commitdiff