260 lines
6.4 KiB
C
260 lines
6.4 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.org/license.html
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*/
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#include "gfx.h"
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#if GFX_USE_GDISP
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#define GDISP_DRIVER_VMT GDISPVMT_PCF8812
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#include "gdisp_lld_config.h"
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#include "../../../src/gdisp/gdisp_driver.h"
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#include "board_PCF8812.h"
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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#define GDISP_MATRIX_HEIGHT 72
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#define GDISP_MATRIX_WIDTH 102
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#define GDISP_SCREEN_HEIGHT 65
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#define GDISP_SCREEN_WIDTH 96
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#define GDISP_INITIAL_CONTRAST 51
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#define GDISP_INITIAL_BACKLIGHT 100
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#define GDISP_FLG_NEEDFLUSH (GDISP_FLG_DRIVER << 0)
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#include "PCF8812.h"
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/*===========================================================================*/
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/* Driver local routines. */
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/*===========================================================================*/
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// Some common routines and macros
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#define RAM(g) ((uint8_t *)g->priv)
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#define xyaddr(x, y) ((x) + ((y) >> 3) * GDISP_MATRIX_WIDTH)
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#define xybit(y) (1 << ((y) & 7))
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/*
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* As this controller can't update on a pixel boundary we need to maintain the
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* the entire display surface in memory so that we can do the necessary bit
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* operations. Fortunately it is a small display in monochrome.
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* Matrix 102 * 65 / 8 = 828,75 bytes.
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* Display 96 * 65 / 8 = 780
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*/
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//#define GDISP_SCREEN_BYTES ((GDISP_SCREEN_WIDTH * GDISP_SCREEN_HEIGHT) / 8)
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#define GDISP_MATRIX_BYTES ((GDISP_MATRIX_WIDTH * GDISP_MATRIX_HEIGHT) / 8) // real height 65 pixels, this fix 65 / 8 != 9
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LLDSPEC gBool gdisp_lld_init(GDisplay *g) {
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// The private area is the display surface.
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if (!(g->priv = gfxAlloc(GDISP_MATRIX_BYTES)))
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gfxHalt("GDISP PCF8812: Failed to allocate private memory");
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// Initialise the board interface
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init_board(g);
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// Hardware reset
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setpin_reset(g, gTrue);
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gfxSleepMilliseconds(100);
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setpin_reset(g, gFalse);
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gfxSleepMilliseconds(100);
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acquire_bus(g);
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write_cmd(g, PCF8812_SET_FUNC | PCF8812_H);
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write_cmd(g, PCF8812_SET_TEMP | PCF8812_TEMP_MODE_2);
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write_cmd(g, PCF8812_SET_BIAS | PCF8812_BIAS_MODE_4);
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write_cmd(g, PCF8812_SET_VOP | (0x40));
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write_cmd(g, PCF8812_SET_FUNC);
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write_cmd(g, PCF8812_SET_DISPLAY | PCF8812_DISPLAY_MODE_NORMAL);
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write_cmd(g, PCF8812_SET_X); // X = 0
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write_cmd(g, PCF8812_SET_Y); // Y = 0
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write_data(g, 0x00, GDISP_MATRIX_BYTES);
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// Finish Init
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post_init_board(g);
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// Release the bus
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release_bus(g);
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/* Turn on the back-light */
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set_backlight(g, GDISP_INITIAL_BACKLIGHT);
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/* Initialise the GDISP structure */
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g->g.Width = GDISP_SCREEN_WIDTH;
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g->g.Height = GDISP_SCREEN_HEIGHT;
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g->g.Orientation = gOrientation0;
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g->g.Powermode = gPowerOn;
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g->g.Backlight = GDISP_INITIAL_BACKLIGHT;
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g->g.Contrast = GDISP_INITIAL_CONTRAST;
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return gTrue;
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}
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#if GDISP_HARDWARE_FLUSH
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LLDSPEC void gdisp_lld_flush(GDisplay *g) {
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// Don't flush if we don't need it.
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if (!(g->flags & GDISP_FLG_NEEDFLUSH)) {
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return;
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}
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acquire_bus(g);
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write_cmd(g, PCF8812_SET_X | 0); // X = 0
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write_cmd(g, PCF8812_SET_Y | 0); // Y = 0
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write_data(g, RAM(g), GDISP_MATRIX_BYTES);
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release_bus(g);
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g->flags &= ~GDISP_FLG_NEEDFLUSH;
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}
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#endif
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#if GDISP_HARDWARE_DRAWPIXEL
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LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) {
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gCoord x, y;
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#if GDISP_NEED_CONTROL
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switch(g->g.Orientation) {
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default:
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case gOrientation0:
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x = g->p.x;
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y = g->p.y;
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break;
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case gOrientation90:
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x = g->p.y;
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y = g->g.Width - g->p.x - 1;
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break;
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case gOrientation180:
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x = g->g.Width - g->p.x - 1;
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y = g->g.Height - g->p.y - 1;
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break;
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case gOrientation270:
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x = g->g.Height - g->p.y - 1;
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y = g->p.x;
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break;
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}
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#else
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x = g->p.x;
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y = g->p.y;
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#endif
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if (gdispColor2Native(g->p.color) != GFX_BLACK) {
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RAM(g)[xyaddr(x, y)] |= xybit(y);
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} else {
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RAM(g)[xyaddr(x, y)] &= ~xybit(y);
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}
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g->flags |= GDISP_FLG_NEEDFLUSH;
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}
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#endif
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#if GDISP_HARDWARE_PIXELREAD
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LLDSPEC gColor gdisp_lld_get_pixel_color(GDisplay *g) {
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gCoord x, y;
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switch(g->g.Orientation) {
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default:
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case gOrientation0:
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x = g->p.x;
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y = g->p.y;
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break;
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case gOrientation90:
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x = g->p.y;
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y = GDISP_SCREEN_HEIGHT-1 - g->p.x;
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break;
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case gOrientation180:
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x = GDISP_SCREEN_WIDTH-1 - g->p.x;
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y = GDISP_SCREEN_HEIGHT-1 - g->p.y;
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break;
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case gOrientation270:
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x = GDISP_SCREEN_WIDTH-1 - g->p.y;
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y = g->p.x;
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break;
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}
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return (RAM(g)[xyaddr(x, y)] & xybit(y)) ? GFX_WHITE : GFX_BLACK;
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}
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#endif
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#if GDISP_NEED_CONTROL
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LLDSPEC void gdisp_lld_control(GDisplay *g) {
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switch(g->p.x) {
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case GDISP_CONTROL_POWER:
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if (g->g.Powermode == (gPowermode)g->p.ptr)
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return;
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switch((gPowermode)g->p.ptr) {
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case gPowerOff:
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case gPowerSleep:
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case gPowerDeepSleep:
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write_cmd(g, PCF8812_SET_FUNC | PCF8812_PD);
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break;
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case gPowerOn:
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write_cmd(g, PCF8812_SET_FUNC);
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break;
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default:
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return;
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}
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g->g.Powermode = (gPowermode)g->p.ptr;
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return;
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case GDISP_CONTROL_ORIENTATION:
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if (g->g.Orientation == (gOrientation)g->p.ptr)
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return;
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switch((gOrientation)g->p.ptr) {
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case gOrientation0:
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case gOrientation180:
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if (g->g.Orientation == gOrientation90 || g->g.Orientation == gOrientation270) {
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gCoord tmp;
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tmp = g->g.Width;
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g->g.Width = g->g.Height;
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g->g.Height = tmp;
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}
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break;
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case gOrientation90:
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case gOrientation270:
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if (g->g.Orientation == gOrientation0 || g->g.Orientation == gOrientation180) {
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gCoord tmp;
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tmp = g->g.Width;
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g->g.Width = g->g.Height;
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g->g.Height = tmp;
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}
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break;
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default:
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return;
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}
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g->g.Orientation = (gOrientation)g->p.ptr;
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return;
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case GDISP_CONTROL_BACKLIGHT:
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if ((unsigned)g->p.ptr > 100) g->p.ptr = (void *)100;
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set_backlight(g, (unsigned)g->p.ptr);
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g->g.Backlight = (unsigned)g->p.ptr;
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return;
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case GDISP_CONTROL_CONTRAST:
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if ((unsigned)g->p.ptr > 100) g->p.ptr = (void *)100;
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g->g.Contrast = (unsigned)g->p.ptr;
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return;
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}
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}
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#endif
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#endif // GFX_USE_GDISP
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