/* * 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 */