286 lines
8.6 KiB
C
286 lines
8.6 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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/**
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* @file drivers/gdisp/SSD1963/gdisp_lld.c
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* @brief GDISP Graphics Driver subsystem low level driver source.
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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_SSD1963
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#include "drivers/gdisp/SSD1963/gdisp_lld_config.h"
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#include "src/gdisp/driver.h"
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#define CALC_PERIOD(w,b,f,p) (p+b+w+f)
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#define CALC_FPR(w,h,hb,hf,hp,vb,vf,vp,fps) ((fps * CALC_PERIOD(w,hb,hf,hp) * CALC_PERIOD(h,vb,vf,vp) * 1048576)/100000000)
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typedef struct LCD_Parameters {
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coord_t width, height; // Panel width and height
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uint16_t hbporch; // Horizontal Back Porch
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uint16_t hfporch; // Horizontal Front Porch
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uint16_t hpulse; // Horizontal Pulse
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uint16_t hperiod; // Horizontal Period (Total)
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uint16_t vbporch; // Vertical Back Porch
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uint16_t vfporch; // Vertical Front Porch
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uint16_t vpulse; // Vertical Pulse
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uint16_t vperiod; // Vertical Period (Total)
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uint32_t fpr; // Calculated FPR
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} LCD_Parameters;
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#include "board_SSD1963.h"
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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#ifndef GDISP_INITIAL_CONTRAST
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#define GDISP_INITIAL_CONTRAST 50
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#endif
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#ifndef GDISP_INITIAL_BACKLIGHT
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#define GDISP_INITIAL_BACKLIGHT 90
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#endif
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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#include "drivers/gdisp/SSD1963/ssd1963.h"
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#define write_reg(g, reg, data) { write_index(g, reg); write_data(g, data); }
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#define write_data16(g, data) { write_data(g, (data)>>8); write_data(g, (data) & 0xFF); }
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static inline void set_viewport(GDisplay* g) {
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write_index(g, SSD1963_SET_PAGE_ADDRESS);
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write_data16(g, g->p.y);
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write_data16(g, g->p.y+g->p.cy-1);
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write_index(g, SSD1963_SET_COLUMN_ADDRESS);
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write_data16(g, g->p.x);
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write_data16(g, g->p.x+g->p.cx-1);
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write_index(g, SSD1963_WRITE_MEMORY_START);
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}
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/**
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* The backlight is controlled by the controller.
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*/
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static inline void set_backlight(GDisplay *g, uint8_t percent) {
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//duty_cycle is 00..FF
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//Work in progress: the SSD1963 has a built-in PWM, its output can
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//be used by a Dynamic Background Control or by a host (user)
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//Check your LCD's hardware, the PWM connection is default left open and instead
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//connected to a LED connection on the breakout board
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write_index(g, SSD1963_SET_PWM_CONF); //set PWM for BackLight
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write_data(g, 0x01);
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write_data(g, (55+percent*2) & 0x00FF);
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write_data(g, 0x01); //controlled by host (not DBC), enabled
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write_data(g, 0xFF);
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write_data(g, 0x60); //don't let it go too dark, avoid a useless LCD
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write_data(g, 0x0F); //prescaler ???
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}
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
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LCD_Parameters * lcdp;
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// The private area for this controller is the LCD timings
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lcdp = (void *)&DisplayTimings[g->controllerdisplay];
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g->priv = lcdp;
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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, TRUE);
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gfxSleepMilliseconds(20);
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setpin_reset(g, FALSE);
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gfxSleepMilliseconds(20);
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// Get the bus for the following initialisation commands
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acquire_bus(g);
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write_index(g, SSD1963_SOFT_RESET);
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gfxSleepMilliseconds(5);
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/* Driver PLL config */
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write_index(g, SSD1963_SET_PLL_MN);
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write_data(g, 35); // PLLclk = REFclk (10Mhz) * 36 (360Mhz)
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write_data(g, 2); // SYSclk = PLLclk / 3 (120MHz)
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write_data(g, 4); // Apply calculation bit, else it is ignored
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write_reg(g, SSD1963_SET_PLL, 0x01); // Enable PLL
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gfxSleepMilliseconds(5);
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write_reg(g, SSD1963_SET_PLL, 0x03); // Use PLL
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gfxSleepMilliseconds(5);
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write_index(g, SSD1963_SOFT_RESET);
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gfxSleepMilliseconds(5);
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/* Screen size */
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write_index(g, SSD1963_SET_GDISP_MODE);
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write_data(g, 0x18); //Enabled dithering
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write_data(g, 0x00);
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write_data16(g, lcdp->width-1);
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write_data16(g, lcdp->height-1);
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write_data(g, 0x00); // RGB
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write_reg(g, SSD1963_SET_PIXEL_DATA_INTERFACE, SSD1963_PDI_16BIT565);
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/* LCD Clock specs */
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write_index(g, SSD1963_SET_LSHIFT_FREQ);
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write_data(g, (lcdp->fpr >> 16) & 0xFF);
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write_data(g, (lcdp->fpr >> 8) & 0xFF);
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write_data(g, lcdp->fpr & 0xFF);
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write_index(g, SSD1963_SET_HORI_PERIOD);
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write_data16(g, lcdp->hperiod);
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write_data16(g, lcdp->hpulse + lcdp->hbporch);
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write_data(g, lcdp->hpulse);
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write_data(g, 0x00);
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write_data(g, 0x00);
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write_data(g, 0x00);
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write_index(g, SSD1963_SET_VERT_PERIOD);
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write_data16(g, lcdp->vperiod);
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write_data16(g, lcdp->vpulse + lcdp->vbporch);
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write_data(g, lcdp->vpulse);
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write_data(g, 0x00);
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write_data(g, 0x00);
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/* Tear effect indicator ON. This is used to tell the host MCU when the driver is not refreshing the panel (during front/back porch) */
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write_reg(g, SSD1963_SET_TEAR_ON, 0x00);
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/* Turn on */
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write_index(g, SSD1963_SET_DISPLAY_ON);
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/* Turn on the back-light */
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set_backlight(g, GDISP_INITIAL_BACKLIGHT);
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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 = lcdp->width;
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g->g.Height = lcdp->height;
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g->g.Orientation = GDISP_ROTATE_0;
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g->g.Powermode = powerOn;
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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 TRUE;
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}
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#if GDISP_HARDWARE_STREAM_WRITE
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LLDSPEC void gdisp_lld_write_start(GDisplay *g) {
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acquire_bus(g);
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set_viewport(g);
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}
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LLDSPEC void gdisp_lld_write_color(GDisplay *g) {
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write_data(g, gdispColor2Native(g->p.color));
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}
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LLDSPEC void gdisp_lld_write_stop(GDisplay *g) {
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release_bus(g);
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}
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#endif
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// Not implemented yet.
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#if 0 && 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 == (powermode_t)g->p.ptr)
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return;
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switch((powermode_t)g->p.ptr) {
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case powerOff:
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acquire_bus(g);
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write_index(g, SSD1963_EXIT_SLEEP_MODE); // leave sleep mode
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gfxSleepMilliseconds(5);
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write_index(g, SSD1963_SET_DISPLAY_OFF);
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write_index(g, SSD1963_SET_DEEP_SLEEP); // enter deep sleep mode
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release_bus(g);
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break;
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case powerOn:
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acquire_bus(g);
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read_reg(0x0000); gfxSleepMilliseconds(5); // 2x Dummy reads to wake up from deep sleep
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read_reg(0x0000); gfxSleepMilliseconds(5);
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write_index(g, SSD1963_SET_DISPLAY_ON);
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release_bus(g);
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break;
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case powerSleep:
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acquire_bus(g);
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write_index(g, SSD1963_SET_DISPLAY_OFF);
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write_index(g, SSD1963_ENTER_SLEEP_MODE); // enter sleep mode
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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 = (powermode_t)g->p.ptr;
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return;
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case GDISP_CONTROL_ORIENTATION:
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if (g->g.Orientation == (orientation_t)g->p.ptr)
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return;
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case GDISP_ROTATE_0:
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acquire_bus(g);
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/* Code here */
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release_bus(g);
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g->g.Height = ((LCD_Parameters *)g->priv)->height;
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g->g.Width = ((LCD_Parameters *)g->priv)->width;
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break;
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case GDISP_ROTATE_90:
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acquire_bus(g);
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/* Code here */
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release_bus(g);
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g->g.Height = ((LCD_Parameters *)g->priv)->width;
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g->g.Width = ((LCD_Parameters *)g->priv)->height;
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break;
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case GDISP_ROTATE_180:
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acquire_bus(g);
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/* Code here */
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release_bus(g);
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g->g.Height = ((LCD_Parameters *)g->priv)->height;
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g->g.Width = ((LCD_Parameters *)g->priv)->width;
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break;
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case GDISP_ROTATE_270:
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acquire_bus(g);
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/* Code here */
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release_bus(g);
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g->g.Height = ((LCD_Parameters *)g->priv)->width;
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g->g.Width = ((LCD_Parameters *)g->priv)->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 = (orientation_t)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)
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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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default:
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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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