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ugfx/drivers/gdisp/RA8875/gdisp_lld_RA8875.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/RA8875/gdisp_lld.c
* @brief GDISP Graphics Driver subsystem low level driver source.
*/
#include "gfx.h"
#if GFX_USE_GDISP /*|| defined(__DOXYGEN__)*/
#define GDISP_DRIVER_VMT GDISPVMT_RA8875
#include "drivers/gdisp/RA8875/gdisp_lld_config.h"
#include "src/gdisp/driver.h"
/* include the users board interface */
#include "board_RA8875.h"
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
#ifndef GDISP_SCREEN_HEIGHT
#define GDISP_SCREEN_HEIGHT 272
#endif
#ifndef GDISP_SCREEN_WIDTH
#define GDISP_SCREEN_WIDTH 480
#endif
#ifndef GDISP_INITIAL_CONTRAST
#define GDISP_INITIAL_CONTRAST 50
#endif
#ifndef GDISP_INITIAL_BACKLIGHT
#define GDISP_INITIAL_BACKLIGHT 74
#endif
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
// Some common routines and macros
#define dummy_read(g) { volatile uint16_t dummy; dummy = read_data(g); (void) dummy; }
#define write_reg8(g, reg, data) { write_index(g, reg); write_data(g, data); }
#define write_reg16(g, reg, data) { write_index(g, reg); write_data(g, data); write_index(g, reg+1); write_data(g, (data)>>8); }
#define write_reg8x2(g, reg, d1, d2) { write_index(g, reg); write_data(g, d1); write_data(g, d2); }
static inline void set_cursor(GDisplay *g) {
write_reg16(g, 0x46, g->p.x);
write_reg16(g, 0x48, g->p.y);
write_index(g, 0x02);
}
static inline void set_viewport(GDisplay* g) {
write_reg16(g, 0x30, g->p.x); //HSAW0 & HSAW1
write_reg16(g, 0x34, g->p.x+g->p.cx-1); //HEAW0 & HEAW1
write_reg16(g, 0x32, g->p.y); //VSAW0 & VSAW1
write_reg16(g, 0x36, g->p.y+g->p.cy-1); //VEAW0 & VEAW1
}
// On this controller the back-light is controlled by the controllers internal PWM
// which is why it is in this file rather than the board file.
static inline void set_backlight(GDisplay* g, uint8_t percent) {
uint8_t temp;
//Work in progress: the RA8875 has a built-in PWM, its output can
//be used by a Dynamic Background Control or by a host (user)
// Enable PWM1
write_index(g, 0x8a); //MCLR
setreadmode(g);
temp = read_data(g);
setwritemode(g);
temp |= 1<<7 ;
write_data(g, temp);
// PWM1 function select
write_index(g, 0x8a); //MCLR
setreadmode(g);
temp = read_data(g);
setwritemode(g);
temp &= ~(1<<4);
write_data(g, temp);
// PWM1 Clock ratio
write_index(g, 0x8a); //MCLR
setreadmode(g);
temp = read_data(g);
setwritemode(g);
temp &= 0xf0;
temp |= 0x0b & 0x0f;
write_data(g, temp);
// PWM1 Write duty cycle
write_reg8(g, 0x8b, 54+percent); // PTNO: Also change percent to range from 0x00 to 0xFF
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
// No private area for this controller
g->priv = 0;
// 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);
// Soft reset
write_reg8x2(g, 0x01, 0x01, 0x00); gfxSleepMilliseconds(1);
// PLL config
write_reg8(g, 0x88, 0x08); gfxSleepMilliseconds(1);
write_reg8(g, 0x89, 0x02); gfxSleepMilliseconds(1);
write_reg8(g, 0x10, 0x0F); //SYSR bit[4:3]=00 256 color bit[2:1]= 00 8bit MPU interface
// 0x0F = 16bit MCU interface and 65k color display
write_reg8(g, 0x04, 0x82); gfxSleepMilliseconds(1); //set PCLK inverse
// Horizontal set
write_reg8(g, 0x14, GDISP_SCREEN_WIDTH/8-1); //HDWR: Horizontal Display Width Setting Bit[6:0] - pixels = (HDWR + 1)*8
write_reg8(g, 0x15, 0x00); //Horizontal Non-Display Period Fine Tuning Option Register (HNDFTR) - HNDFT = [3:0]
write_reg8(g, 0x16, 0x01); //HNDR: Horizontal Non-Display Period Bit[4:0] - pixels = (HNDR + 1)*8
write_reg8(g, 0x17, 0x00); //HSTR: HSYNC Start Position[4:0] - Position(PCLK) = (HSTR + 1)*8
write_reg8(g, 0x18, 0x05); //HPWR: HSYNC Polarity, The period width of HSYNC. Width [4:0] width(PCLK) = (HPWR + 1)*8
// Vertical set
write_reg16(g, 0x19, GDISP_SCREEN_HEIGHT-1); //VDHR0,1: Vertical Display Height = VDHR + 1
write_reg16(g, 0x1b, 0x0002); //VNDR0,1: Vertical Non-Display Period Bit = (VSTR + 1)
write_reg16(g, 0x1d, 0x0007); //VSTR0,1: VSYNC Start Position = (VSTR + 1)
write_reg8(g, 0x1f, 0x09); //VPWR: VSYNC Polarity, VSYNC Pulse Width[6:0] - Width(PCLK) = (VPWR + 1)
// Active window set
write_reg16(g, 0x30, 0); //HSAW0 & HSAW1
write_reg16(g, 0x34, GDISP_SCREEN_WIDTH-1); //HEAW0 & HEAW1
write_reg16(g, 0x32, 0); //VSAW0 & VSAW1
write_reg16(g, 0x36, GDISP_SCREEN_HEIGHT-1); //VEAW0 & VEAW1
// Display ON
write_reg8(g, 0x01, 0x80); //PWRR
// GPO0 DISP high
write_reg8(g, 0x13, 0x01); //GPO
// Set initial back-light
set_backlight(g, GDISP_INITIAL_BACKLIGHT);
// Change timings for faster access
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_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);
}
LLDSPEC void gdisp_lld_write_pos(GDisplay *g) {
set_cursor(g);
}
#endif
#if GDISP_NEED_CONTROL && GDISP_HARDWARE_CONTROL
LLDSPEC void gdisp_lld_control(GDisplay *g) {
switch(g->p.x) {
#if 0
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);
// TODO
release_bus(g);
break;
case powerOn:
acquire_bus(g);
// TODO
release_bus(g);
break;
case powerSleep:
acquire_bus(g);
// TODO
release_bus(g);
break;
default:
return;
}
g->g.Powermode = (powermode_t)g->p.ptr;
return;
#endif
#if 0
case GDISP_CONTROL_ORIENTATION:
if (g->g.Orientation == (orientation_t)g->p.ptr)
return;
switch((orientation_t)g->p.ptr) {
case GDISP_ROTATE_0:
acquire_bus(g);
// TODO
release_bus(g);
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Width = GDISP_SCREEN_WIDTH;
break;
case GDISP_ROTATE_90:
acquire_bus(g);
// TODO
release_bus(g);
g->g.Height = GDISP_SCREEN_WIDTH;
g->g.Width = GDISP_SCREEN_HEIGHT;
break;
case GDISP_ROTATE_180:
acquire_bus(g);
// TODO
release_bus(g);
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Width = GDISP_SCREEN_WIDTH;
break;
case GDISP_ROTATE_270:
acquire_bus(g);
// TODO
release_bus(g);
g->g.Height = GDISP_SCREEN_WIDTH;
g->g.Width = GDISP_SCREEN_HEIGHT;
break;
default:
return;
}
g->g.Orientation = (orientation_t)g->p.ptr;
return;
#endif
case GDISP_CONTROL_BACKLIGHT:
if ((unsigned)g->p.ptr > 100)
g->p.ptr = (void *)100;
acquire_bus(g);
set_backlight(g, (unsigned)g->p.ptr);
release_bus(g);
g->g.Backlight = (unsigned)g->p.ptr;
return;
//case GDISP_CONTROL_CONTRAST:
default:
return;
}
}
#endif
#endif /* GFX_USE_GDISP */
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