284 lines
7.3 KiB
C
284 lines
7.3 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.io/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_ST7565
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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_ST7565.h"
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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#ifndef GDISP_SCREEN_HEIGHT
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#define GDISP_SCREEN_HEIGHT 64
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#endif
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#ifndef GDISP_SCREEN_WIDTH
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#define GDISP_SCREEN_WIDTH 128
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#endif
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#ifndef GDISP_INITIAL_CONTRAST
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#define GDISP_INITIAL_CONTRAST 51
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#endif
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#ifndef GDISP_INITIAL_BACKLIGHT
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#define GDISP_INITIAL_BACKLIGHT 100
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#endif
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#define GDISP_FLG_NEEDFLUSH (GDISP_FLG_DRIVER<<0)
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#include "st7565.h"
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/*===========================================================================*/
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/* Driver config defaults for backward compatibility. */
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/*===========================================================================*/
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#ifndef ST7565_LCD_BIAS
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#define ST7565_LCD_BIAS ST7565_LCD_BIAS_7
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#endif
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#ifndef ST7565_ADC
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#define ST7565_ADC ST7565_ADC_NORMAL
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#endif
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#ifndef ST7565_COM_SCAN
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#define ST7565_COM_SCAN ST7565_COM_SCAN_INC
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#endif
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#ifndef ST7565_PAGE_ORDER
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#define ST7565_PAGE_ORDER 0,1,2,3,4,5,6,7
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#endif
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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// Some common routines and macros
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#define RAM(g) ((gU8 *)g->priv)
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#define write_cmd2(g, cmd1, cmd2) { write_cmd(g, cmd1); write_cmd(g, cmd2); }
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#define write_cmd3(g, cmd1, cmd2, cmd3) { write_cmd(g, cmd1); write_cmd(g, cmd2); write_cmd(g, cmd3); }
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// Some common routines and macros
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#define delay(us) gfxSleepMicroseconds(us)
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#define delay_ms(ms) gfxSleepMilliseconds(ms)
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#define xyaddr(x, y) ((x) + ((y)>>3)*GDISP_SCREEN_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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* 64 * 128 / 8 = 1024 bytes.
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*/
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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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g->priv = gfxAlloc(GDISP_SCREEN_HEIGHT * GDISP_SCREEN_WIDTH / 8);
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if (!g->priv) {
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return gFalse;
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}
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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(20);
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setpin_reset(g, gFalse);
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gfxSleepMilliseconds(20);
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acquire_bus(g);
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write_cmd(g, ST7565_LCD_BIAS);
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write_cmd(g, ST7565_ADC);
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write_cmd(g, ST7565_COM_SCAN);
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write_cmd(g, ST7565_START_LINE | 0);
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write_cmd2(g, ST7565_CONTRAST, GDISP_INITIAL_CONTRAST*64/101);
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write_cmd(g, ST7565_RESISTOR_RATIO | 0x3);
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// turn on voltage converter (VC=1, VR=0, VF=0)
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write_cmd(g, ST7565_POWER_CONTROL | 0x04);
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delay_ms(50);
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// turn on voltage regulator (VC=1, VR=1, VF=0)
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write_cmd(g, ST7565_POWER_CONTROL | 0x06);
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delay_ms(50);
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// turn on voltage follower (VC=1, VR=1, VF=1)
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write_cmd(g, ST7565_POWER_CONTROL | 0x07);
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delay_ms(50);
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write_cmd(g, ST7565_DISPLAY_ON);
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write_cmd(g, ST7565_ALLON_NORMAL);
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write_cmd(g, ST7565_POSITIVE_DISPLAY); // Disable Inversion of display.
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write_cmd(g, ST7565_RMW);
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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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// 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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unsigned p;
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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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acquire_bus(g);
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gU8 pagemap[8]={ST7565_PAGE_ORDER};
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for (p = 0; p < 8; p++) {
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write_cmd(g, ST7565_PAGE | pagemap[p]);
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write_cmd(g, ST7565_COLUMN_MSB | 0);
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write_cmd(g, ST7565_COLUMN_LSB | 0);
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write_cmd(g, ST7565_RMW);
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write_data(g, RAM(g) + (p*GDISP_SCREEN_WIDTH), GDISP_SCREEN_WIDTH);
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}
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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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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_HEIGHT-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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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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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_HEIGHT-1 - g->p.y;
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x = 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 && GDISP_HARDWARE_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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acquire_bus(g);
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write_cmd(g, ST7565_DISPLAY_OFF);
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release_bus(g);
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break;
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case gPowerOn:
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acquire_bus(g);
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write_cmd(g, ST7565_DISPLAY_ON);
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release_bus(g);
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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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// Rotation is handled by the drawing routines
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case gOrientation0:
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case gOrientation180:
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g->g.Height = GDISP_SCREEN_HEIGHT;
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g->g.Width = GDISP_SCREEN_WIDTH;
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break;
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case gOrientation90:
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case gOrientation270:
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g->g.Height = GDISP_SCREEN_WIDTH;
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g->g.Width = GDISP_SCREEN_HEIGHT;
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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_CONTRAST:
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if ((unsigned)g->p.ptr > 100)
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g->p.ptr = (void *)100;
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acquire_bus(g);
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write_cmd2(g, ST7565_CONTRAST, ((((unsigned)g->p.ptr)<<6)/101) & 0x3F);
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release_bus(g);
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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 // GDISP_NEED_CONTROL
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#endif // GFX_USE_GDISP
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