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ugfx/drivers/gdisp/KS0108/gdisp_lld_KS0108.c

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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
#include "gfx.h"
#if GFX_USE_GDISP
/* Robert Offner 2017
* This is a driver for the KS0107 Displays.
* It should work with displays up to 240 pixel in width and 64 pixel in height
* ATTENTION some newer displays on ebay look like KS0107 Type but they're not!
* They use a new controller: ST7920. These are easy to identify: NO CS pin but
* a PSB Pin which switches from parallel to serial communication mode.
* If it cost less than 10.- it is probably a ST7920.
* Features: Well not much. For now write pixel to display and
* Read from Display / Buffer in RAM. Buffer in Ram is much faster than
* readback!
* I am trying to get the auto increment feature somehow implemented. It
* basically means if you start at x=0 and continue with x=1, x=2,... you don't
* have to write the address just data.
*
* Version: 0.3
*
* History:
* v0.4
* .) Cleanup by uGFX team. Code needs a lot of work.
*
* v0.3
* .) Removed initialization of g->priv because it is already done by uGFX.
*
* v0.2
* .) Cleanup,
* .) changed osalThreadSleep to gfxSleepMicroseconds(x)
* ATTENTION: for gfxSleepMicroseconds to work on chibios you have to
* increase CH_CFG_ST_FREQUENCY to 1000000 and probably CH_CFG_ST_RESOLUTION
* to 32 bit (not tested because STM32F103 doesn't have a 32 bit timer
* .) changed lcdbuf to g->priv
*
* v0.1 Initial Release
*/
#define GDISP_DRIVER_VMT GDISPVMT_KS0108
#include "gdisp_lld_config.h"
#include "../../../src/gdisp/gdisp_driver.h"
#include "board_KS0108.h"
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
#ifndef GDISP_SCREEN_HEIGHT
#define GDISP_SCREEN_HEIGHT 64
#endif
#ifndef GDISP_SCREEN_WIDTH
#define GDISP_SCREEN_WIDTH 128
#endif
#define CHIPS (GDISP_SCREEN_WIDTH/64)
#if !KS0108_NEED_READ
#define BUFFSZ (GDISP_SCREEN_HEIGHT/8 * GDISP_SCREEN_WIDTH)
#define RAM(g) ((uint8_t *)g->priv)
#endif
#ifndef GDISP_INITIAL_CONTRAST
#define GDISP_INITIAL_CONTRAST 50
#endif
#ifndef GDISP_INITIAL_BACKLIGHT
#define GDISP_INITIAL_BACKLIGHT 100
#endif
// KS0108 Commands
#define KS0108_CHIP1_ON 0x003F
#define KS0108_CHIP2_ON 0x013F
#define KS0108_DISP1START 0x00C0
#define KS0108_DISP2START 0x01C0
#define KS0108_DISP1OFF 0x003E
#define KS0108_DISP2OFF 0x013E
#define KS0108_SET_ADDR 0x0040
#define KS0108_SET_PAGE 0x00B8
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
#ifndef write_data_repeat
#define write_data_repeat(g, data, count) { int i; for (i = 0; i < count; ++i) write_data (g, data); }
#endif
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
LLDSPEC gBool gdisp_lld_init(GDisplay *g) {
#if !KS0108_NEED_READ
// The private area is the display surface.
g->priv = gfxAlloc(BUFFSZ);
#else
g->priv = 0;
#endif
// Initialise the board interface
init_board(g);
#if KS0108_HAS_RESET //Make Hardware Reset
setpin_reset(g, gTrue);
gfxSleepMilliseconds(120);
setpin_reset(g, gFalse);
#endif
gfxSleepMilliseconds(120);
write_cmd(g, KS0108_DISP1OFF);
gfxSleepMilliseconds(1);
write_cmd(g, KS0108_DISP2OFF);
gfxSleepMilliseconds(1);
write_cmd(g, KS0108_CHIP1_ON); //0x3F Chip1
gfxSleepMilliseconds(1);
write_cmd(g, KS0108_CHIP2_ON); //0x3F Chip2
gfxSleepMilliseconds(1);
write_cmd(g, KS0108_DISP1START); //0xC0 Chip1
gfxSleepMilliseconds(1);
write_cmd(g, KS0108_DISP2START); //0xC0 Chip2
gfxSleepMilliseconds(1);
// Finish Init
post_init_board(g);
#if KS0108_NEED_BACKLIGHT
// Turn on the back-light
set_backlight(g, GDISP_INITIAL_BACKLIGHT);
#endif
// Initialise the GDISP structure
g->g.Width = GDISP_SCREEN_WIDTH;
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Orientation = GDISP_ROTATE_0;
g->g.Powermode = powerOn;
g->g.Backlight = GDISP_INITIAL_BACKLIGHT;
g->g.Contrast = GDISP_INITIAL_CONTRAST;
return gTrue;
}
GFXINLINE void KS0108_goto(GDisplay* g, ) {
}
static void set_viewport(GDisplay *g) {
uint16_t pg;
uint16_t chip;
pg = g->p.y >> 3;
chip = (g->p.x >> 6) << 8;
write_cmd(g, KS0108_SET_PAGE | chip | pg); // (0xB8) - Set page
write_cmd(g, KS0108_SET_ADDR | chip | g->p.x); // (0x40) - Set x Address
}
LLDSPEC void gdisp_lld_write_color(GDisplay *g) {
uint16_t data;
data = (g->p.x >> 6) << 8; // Set the chip
if (g->p.color != GFX_WHITE)
data |= 0x01; // set dot
write_data(g, data);
}
LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) {
set_viewport(g);
gdisp_lld_write_color(g);
}
#if GDISP_HARDWARE_STREAM_WRITE
LLDSPEC void gdisp_lld_write_start(GDisplay *g) {
acquire_bus(g);
set_viewport(g);
}
LLDSPEC void gdisp_lld_write_stop(GDisplay *g) {
release_bus(g);
}
#endif
#if GDISP_HARDWARE_STREAM_READ
LLDSPEC void gdisp_lld_read_start(GDisplay *g) {
acquire_bus(g);
set_viewport(g);
setreadmode(g);
dummy_read(g);
}
LLDSPEC color_t gdisp_lld_read_color(GDisplay *g) {
uint16_t data;
data = read_data(g);
return gdispNative2Color(data);
}
LLDSPEC void gdisp_lld_read_stop(GDisplay *g) {
setwritemode(g);
release_bus(g);
}
#endif
#if GDISP_HARDWARE_FILLS
LLDSPEC void gdisp_lld_fill_area(GDisplay *g) {
uint8_t data, j;
set_viewport(g);
if (g->p.color != GFX_WHITE) {
data = 0xFF; // set dot
}
else {
data = 0; // clr dot
}
for (j=0; j < (g->p.cy)/8; j++) {
write_data_repeat(g, data, (g->p.cx));
(g->p.cy) +=8;
set_viewport(g);
}
}
#endif // GDISP_HARDWARE_FILLS
#if GDISP_NEED_CONTROL && GDISP_HARDWARE_CONTROL
LLDSPEC void gdisp_lld_control(GDisplay *g) {
switch(g->p.x) {
case GDISP_CONTROL_POWER:
if (g->g.Powermode == (powermode_t)g->p.ptr)
return;
switch((powermode_t)g->p.ptr) {
case powerOff:
acquire_bus(g);
write_index(g, 0x28);
gfxSleepMilliseconds(10);
write_index(g, 0x10);
release_bus(g);
break;
case powerOn:
acquire_bus(g);
write_index(g, 0x11);
gfxSleepMilliseconds(120);
write_index(g, 0x29);
release_bus(g);
if (g->g.Powermode != powerSleep)
gdisp_lld_init(g);
break;
case powerSleep:
acquire_bus(g);
write_index(g, 0x28);
gfxSleepMilliseconds(10);
write_index(g, 0x10);
release_bus(g);
break;
default:
return;
}
g->g.Powermode = (powermode_t)g->p.ptr;
return;
case GDISP_CONTROL_ORIENTATION:
if (g->g.Orientation == (orientation_t)g->p.ptr)
return;
switch((orientation_t)g->p.ptr) {
case GDISP_ROTATE_0:
acquire_bus(g);
write_index(g, 0x36);
write_data(g, 0x08);
release_bus(g);
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Width = GDISP_SCREEN_WIDTH;
break;
case GDISP_ROTATE_90:
acquire_bus(g);
write_index(g, 0x36);
write_data(g, 0x68);
release_bus(g);
g->g.Height = GDISP_SCREEN_WIDTH;
g->g.Width = GDISP_SCREEN_HEIGHT;
break;
case GDISP_ROTATE_180:
acquire_bus(g);
write_index(g, 0x36);
write_data(g, 0xC8);
release_bus(g);
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Width = GDISP_SCREEN_WIDTH;
break;
case GDISP_ROTATE_270:
acquire_bus(g);
write_index(g, 0x36);
write_data(g, 0xA8);
release_bus(g);
g->g.Height = GDISP_SCREEN_WIDTH;
g->g.Width = GDISP_SCREEN_HEIGHT;
break;
default:
return;
}
g->g.Orientation = (orientation_t)g->p.ptr;
return;
default:
return;
}
}
#endif
#endif /* GFX_USE_GDISP */
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