diff options
Diffstat (limited to 'drv_LPH7508.c')
| -rw-r--r-- | drv_LPH7508.c | 141 |
1 files changed, 114 insertions, 27 deletions
diff --git a/drv_LPH7508.c b/drv_LPH7508.c index 3e7aec2..24f7ebc 100644 --- a/drv_LPH7508.c +++ b/drv_LPH7508.c @@ -1,4 +1,4 @@ -/* $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 * @@ -23,6 +23,9 @@ * * * $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 * @@ -83,58 +86,79 @@ unsigned char *Buffer1, *Buffer2; 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; @@ -146,13 +170,61 @@ static void drv_L7_blit(const int row, const int col, const int height, const in } /* 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; @@ -218,29 +290,37 @@ static int drv_L7_start(const char *section) /* 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; } @@ -250,7 +330,14 @@ static int drv_L7_start(const char *section) /*** 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); +} /****************************************/ @@ -318,7 +405,7 @@ int drv_L7_init(const char *section, const int quiet) widget_register(&wc); /* register plugins */ - /* none at the moment... */ + AddFunction("LCD::contrast", 1, plugin_contrast); return 0; |