diff options
Diffstat (limited to 'drivers/gdisp/PCF8812/gdisp_lld_PCF8812.c')
| -rw-r--r-- | drivers/gdisp/PCF8812/gdisp_lld_PCF8812.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/drivers/gdisp/PCF8812/gdisp_lld_PCF8812.c b/drivers/gdisp/PCF8812/gdisp_lld_PCF8812.c new file mode 100644 index 00000000..083f6d50 --- /dev/null +++ b/drivers/gdisp/PCF8812/gdisp_lld_PCF8812.c @@ -0,0 +1,213 @@ +/* + * 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 + +#define GDISP_DRIVER_VMT GDISPVMT_PCF8812 +#include "drivers/gdisp/PCF8812/gdisp_lld_config.h" +#include "src/gdisp/driver.h" + +#include "board_PCF8812.h" + +/*===========================================================================*/ +/* Driver local definitions. */ +/*===========================================================================*/ + +#ifndef GDISP_SCREEN_HEIGHT + #define GDISP_SCREEN_HEIGHT 65 +#endif +#ifndef GDISP_SCREEN_WIDTH + #define GDISP_SCREEN_WIDTH 102 +#endif +#ifndef GDISP_INITIAL_CONTRAST + #define GDISP_INITIAL_CONTRAST 51 +#endif +#ifndef GDISP_INITIAL_BACKLIGHT + #define GDISP_INITIAL_BACKLIGHT 100 +#endif + +#define GDISP_FLG_NEEDFLUSH (GDISP_FLG_DRIVER<<0) + +#include "drivers/gdisp/PCF8812/PCF8812.h" + +/*===========================================================================*/ +/* Driver local functions. */ +/*===========================================================================*/ + +// Some common routines and macros +#define RAM(g) ((uint8_t *)g->priv) + +#define xyaddr(x, y) ((x) + ((y)>>3)*GDISP_SCREEN_WIDTH) +#define xybit(y) (1<<((y)&7)) + +/*===========================================================================*/ +/* Driver exported functions. */ +/*===========================================================================*/ + +/* + * As this controller can't update on a pixel boundary we need to maintain the + * the entire display surface in memory so that we can do the necessary bit + * operations. Fortunately it is a small display in monochrome. + * 65 * 102 / 8 = 829 bytes. + */ + +LLDSPEC bool_t gdisp_lld_init(GDisplay *g) { + // The private area is the display surface. + g->priv = gfxAlloc((GDISP_SCREEN_WIDTH * GDISP_SCREEN_HEIGHT / 8)); + + // Initialise the board interface + init_board(g); + + // Hardware reset + setpin_reset(g, TRUE); + gfxSleepMilliseconds(100); + setpin_reset(g, FALSE); + gfxSleepMilliseconds(100); + + acquire_bus(g); + + write_cmd(g, PCF8812_SET_FUNC | PCF8812_H); + write_cmd(g, PCF8812_TEMP_CONTROL | PCF8812_TEMP_MODE_1); + write_cmd(g, PCF8812_SET_VMULT | PCF8812_VMULT_MODE_1); + write_cmd(g, PCF8812_SET_VOP | 0xFF); + write_cmd(g, PCF8812_SET_FUNC); + write_cmd(g, PCF8812_DISPLAY | PCF8812_DISPLAY_MODE_NORMAL); + + + + unsigned int i; + for (i = 0; i < (GDISP_SCREEN_WIDTH * GDISP_SCREEN_HEIGHT / 8); ++i) + { + RAM(g)[i] &= 0x00; + write_data(g, (uint8_t*)0x00, 1); + } + + // Finish Init + post_init_board(g); + + // Release the bus + release_bus(g); + + /* 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 TRUE; +} + +#if GDISP_HARDWARE_FLUSH + LLDSPEC void gdisp_lld_flush(GDisplay *g) { + + // Don't flush if we don't need it. + if (!(g->flags & GDISP_FLG_NEEDFLUSH)) + return; + + unsigned int i; + + acquire_bus(g); + for (i = 0; i < (GDISP_SCREEN_WIDTH * GDISP_SCREEN_HEIGHT / 8); i += GDISP_SCREEN_WIDTH) { + write_data(g, RAM(g) + i, GDISP_SCREEN_WIDTH); + } + release_bus(g); + } +#endif + +#if GDISP_HARDWARE_DRAWPIXEL + LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) { + coord_t x, y; + + switch(g->g.Orientation) { + default: + case GDISP_ROTATE_0: + x = g->p.x; + y = g->p.y; + break; + case GDISP_ROTATE_90: + x = g->p.y; + y = GDISP_SCREEN_HEIGHT-1 - g->p.x; + break; + case GDISP_ROTATE_180: + x = GDISP_SCREEN_WIDTH-1 - g->p.x; + y = GDISP_SCREEN_HEIGHT-1 - g->p.y; + break; + case GDISP_ROTATE_270: + x = GDISP_SCREEN_HEIGHT-1 - g->p.y; + y = g->p.x; + break; + } + if (gdispColor2Native(g->p.color) == Black) + RAM(g)[xyaddr(x, y)] |= xybit(y); + else + RAM(g)[xyaddr(x, y)] &= ~xybit(y); + g->flags |= GDISP_FLG_NEEDFLUSH; + } +#endif + +#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: + case powerSleep: + case powerDeepSleep: + acquire_bus(g); + write_cmd(g, PCF8812_DISPLAY_OFF); + release_bus(g); + break; + case powerOn: + acquire_bus(g); + write_cmd(g, PCF8812_DISPLAY_ON); + 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) { + /* Rotation is handled by the drawing routines */ + case GDISP_ROTATE_0: + case GDISP_ROTATE_180: + g->g.Height = GDISP_SCREEN_HEIGHT; + g->g.Width = GDISP_SCREEN_WIDTH; + break; + case GDISP_ROTATE_90: + case GDISP_ROTATE_270: + g->g.Height = GDISP_SCREEN_WIDTH; + g->g.Width = GDISP_SCREEN_HEIGHT; + break; + default: + return; + } + g->g.Orientation = (orientation_t)g->p.ptr; + return; + + case GDISP_CONTROL_CONTRAST: + if ((unsigned)g->p.ptr > 100) + g->p.ptr = (void *)100; + acquire_bus(g); + release_bus(g); + g->g.Contrast = (unsigned)g->p.ptr; + return; + } + } +#endif // GDISP_NEED_CONTROL + +#endif // GFX_USE_GDISP |