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ugfx/drivers/gdisp/SSD1963/gdisp_lld_SSD1963.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
*/
/**
* @file drivers/gdisp/SSD1963/gdisp_lld.c
* @brief GDISP Graphics Driver subsystem low level driver source.
*/
#include "gfx.h"
#if GFX_USE_GDISP
#define GDISP_DRIVER_VMT GDISPVMT_SSD1963
#include "drivers/gdisp/SSD1963/gdisp_lld_config.h"
#include "src/gdisp/driver.h"
#define CALC_PERIOD(w,b,f,p) (p+b+w+f)
#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)
typedef struct LCD_Parameters {
coord_t width, height; // Panel width and height
uint16_t hbporch; // Horizontal Back Porch
uint16_t hfporch; // Horizontal Front Porch
uint16_t hpulse; // Horizontal Pulse
uint16_t hperiod; // Horizontal Period (Total)
uint16_t vbporch; // Vertical Back Porch
uint16_t vfporch; // Vertical Front Porch
uint16_t vpulse; // Vertical Pulse
uint16_t vperiod; // Vertical Period (Total)
uint32_t fpr; // Calculated FPR
} LCD_Parameters;
#include "board_SSD1963.h"
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
#ifndef GDISP_INITIAL_CONTRAST
#define GDISP_INITIAL_CONTRAST 50
#endif
#ifndef GDISP_INITIAL_BACKLIGHT
#define GDISP_INITIAL_BACKLIGHT 90
#endif
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
#include "drivers/gdisp/SSD1963/ssd1963.h"
#define write_reg(g, reg, data) { write_index(g, reg); write_data(g, data); }
#define write_data16(g, data) { write_data(g, (data)>>8); write_data(g, (data) & 0xFF); }
static inline void set_viewport(GDisplay* g) {
write_index(g, SSD1963_SET_PAGE_ADDRESS);
write_data16(g, g->p.y);
write_data16(g, g->p.y+g->p.cy-1);
write_index(g, SSD1963_SET_COLUMN_ADDRESS);
write_data16(g, g->p.x);
write_data16(g, g->p.x+g->p.cx-1);
write_index(g, SSD1963_WRITE_MEMORY_START);
}
/**
* The backlight is controlled by the controller.
*/
static inline void set_backlight(GDisplay *g, uint8_t percent) {
//duty_cycle is 00..FF
//Work in progress: the SSD1963 has a built-in PWM, its output can
//be used by a Dynamic Background Control or by a host (user)
//Check your LCD's hardware, the PWM connection is default left open and instead
//connected to a LED connection on the breakout board
write_index(g, SSD1963_SET_PWM_CONF); //set PWM for BackLight
write_data(g, 0x01);
write_data(g, (55+percent*2) & 0x00FF);
write_data(g, 0x01); //controlled by host (not DBC), enabled
write_data(g, 0xFF);
write_data(g, 0x60); //don't let it go too dark, avoid a useless LCD
write_data(g, 0x0F); //prescaler ???
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
LCD_Parameters * lcdp;
// The private area for this controller is the LCD timings
lcdp = (void *)&DisplayTimings[g->controllerdisplay];
g->priv = lcdp;
// Initialise the board interface
init_board(g);
// Hardware reset
setpin_reset(g, TRUE);
gfxSleepMilliseconds(20);
setpin_reset(g, FALSE);
gfxSleepMilliseconds(20);
// Get the bus for the following initialisation commands
acquire_bus(g);
write_index(g, SSD1963_SOFT_RESET);
gfxSleepMilliseconds(5);
/* Driver PLL config */
write_index(g, SSD1963_SET_PLL_MN);
write_data(g, 35); // PLLclk = REFclk (10Mhz) * 36 (360Mhz)
write_data(g, 2); // SYSclk = PLLclk / 3 (120MHz)
write_data(g, 4); // Apply calculation bit, else it is ignored
write_reg(g, SSD1963_SET_PLL, 0x01); // Enable PLL
gfxSleepMilliseconds(5);
write_reg(g, SSD1963_SET_PLL, 0x03); // Use PLL
gfxSleepMilliseconds(5);
write_index(g, SSD1963_SOFT_RESET);
gfxSleepMilliseconds(5);
/* Screen size */
write_index(g, SSD1963_SET_GDISP_MODE);
write_data(g, 0x18); //Enabled dithering
write_data(g, 0x00);
write_data16(g, lcdp->width-1);
write_data16(g, lcdp->height-1);
write_data(g, 0x00); // RGB
write_reg(g, SSD1963_SET_PIXEL_DATA_INTERFACE, SSD1963_PDI_16BIT565);
/* LCD Clock specs */
write_index(g, SSD1963_SET_LSHIFT_FREQ);
write_data(g, (lcdp->fpr >> 16) & 0xFF);
write_data(g, (lcdp->fpr >> 8) & 0xFF);
write_data(g, lcdp->fpr & 0xFF);
write_index(g, SSD1963_SET_HORI_PERIOD);
write_data16(g, lcdp->hperiod);
write_data16(g, lcdp->hpulse + lcdp->hbporch);
write_data(g, lcdp->hpulse);
write_data(g, 0x00);
write_data(g, 0x00);
write_data(g, 0x00);
write_index(g, SSD1963_SET_VERT_PERIOD);
write_data16(g, lcdp->vperiod);
write_data16(g, lcdp->vpulse + lcdp->vbporch);
write_data(g, lcdp->vpulse);
write_data(g, 0x00);
write_data(g, 0x00);
/* Tear effect indicator ON. This is used to tell the host MCU when the driver is not refreshing the panel (during front/back porch) */
write_reg(g, SSD1963_SET_TEAR_ON, 0x00);
/* Turn on */
write_index(g, SSD1963_SET_DISPLAY_ON);
/* Turn on the back-light */
set_backlight(g, GDISP_INITIAL_BACKLIGHT);
// Finish Init
post_init_board(g);
// Release the bus
release_bus(g);
/* Initialise the GDISP structure */
g->g.Width = lcdp->width;
g->g.Height = lcdp->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_STREAM_WRITE
LLDSPEC void gdisp_lld_write_start(GDisplay *g) {
acquire_bus(g);
set_viewport(g);
}
LLDSPEC void gdisp_lld_write_color(GDisplay *g) {
write_data(g, gdispColor2Native(g->p.color));
}
LLDSPEC void gdisp_lld_write_stop(GDisplay *g) {
release_bus(g);
}
#endif
// Not implemented yet.
#if 0 && 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, SSD1963_EXIT_SLEEP_MODE); // leave sleep mode
gfxSleepMilliseconds(5);
write_index(g, SSD1963_SET_DISPLAY_OFF);
write_index(g, SSD1963_SET_DEEP_SLEEP); // enter deep sleep mode
release_bus(g);
break;
case powerOn:
acquire_bus(g);
read_reg(0x0000); gfxSleepMilliseconds(5); // 2x Dummy reads to wake up from deep sleep
read_reg(0x0000); gfxSleepMilliseconds(5);
write_index(g, SSD1963_SET_DISPLAY_ON);
release_bus(g);
break;
case powerSleep:
acquire_bus(g);
write_index(g, SSD1963_SET_DISPLAY_OFF);
write_index(g, SSD1963_ENTER_SLEEP_MODE); // enter sleep mode
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;
case GDISP_ROTATE_0:
acquire_bus(g);
/* Code here */
release_bus(g);
g->g.Height = ((LCD_Parameters *)g->priv)->height;
g->g.Width = ((LCD_Parameters *)g->priv)->width;
break;
case GDISP_ROTATE_90:
acquire_bus(g);
/* Code here */
release_bus(g);
g->g.Height = ((LCD_Parameters *)g->priv)->width;
g->g.Width = ((LCD_Parameters *)g->priv)->height;
break;
case GDISP_ROTATE_180:
acquire_bus(g);
/* Code here */
release_bus(g);
g->g.Height = ((LCD_Parameters *)g->priv)->height;
g->g.Width = ((LCD_Parameters *)g->priv)->width;
break;
case GDISP_ROTATE_270:
acquire_bus(g);
/* Code here */
release_bus(g);
g->g.Height = ((LCD_Parameters *)g->priv)->width;
g->g.Width = ((LCD_Parameters *)g->priv)->height;
break;
default:
return;
}
g->g.Orientation = (orientation_t)g->p.ptr;
return;
case GDISP_CONTROL_BACKLIGHT:
if ((unsigned)g->p.ptr > 100)
g->p.ptr = (void *)100;
set_backlight(g, (unsigned)g->p.ptr);
g->g.Backlight = (unsigned)g->p.ptr;
return;
//case GDISP_CONTROL_CONTRAST:
default:
return;
}
}
#endif
#endif /* GFX_USE_GDISP */
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