/* * Created by Oleg Gerasimov * 14.08.2016 */ #include "gfx.h" #if GFX_USE_GDISP #if defined(GDISP_SCREEN_HEIGHT) || defined(GDISP_SCREEN_HEIGHT) #if GFX_COMPILER_WARNING_TYPE == GFX_COMPILER_WARNING_DIRECT #warning "GDISP: This low level driver does not support setting a screen size. It is being ignored." #elif GFX_COMPILER_WARNING_TYPE == GFX_COMPILER_WARNING_MACRO COMPILER_WARNING("GDISP: This low level driver does not support setting a screen size. It is being ignored.") #endif #undef GDISP_SCREEN_WIDTH #undef GDISP_SCREEN_HEIGHT #endif #define GDISP_DRIVER_VMT GDISPVMT_ST7735 #include "gdisp_lld_config.h" #include "src/gdisp/gdisp_driver.h" #include "board_ST7735.h" /*===========================================================================*/ /* Driver local definitions. */ /*===========================================================================*/ #ifndef GDISP_SCREEN_HEIGHT #define GDISP_SCREEN_HEIGHT 160 #endif #ifndef GDISP_SCREEN_WIDTH #define GDISP_SCREEN_WIDTH 128 #endif #ifndef GDISP_INITIAL_CONTRAST #define GDISP_INITIAL_CONTRAST 100 #endif #ifndef GDISP_INITIAL_BACKLIGHT #define GDISP_INITIAL_BACKLIGHT 100 #endif // Define one of supported type, if not defined yet #if !defined(ST7735_TYPE_R) && !defined(ST7735_TYPE_B) // It seems all modern boards is 7735R #define ST7735_TYPE_R TRUE #endif // Define one of supported color packing, if not defined yet #if !defined(ST7735_COLOR_RGB) && !defined(ST7735_COLOR_BRG) // It seems all modern boards is RGB #define ST7735_COLOR_RGB TRUE #endif // Strange boars with shifted coords #if !defined (ST7735_SHIFTED_COORDS) #define ST7735_SHIFTED_COORDS FALSE #endif #if ST7735_COLOR_RGB #define ST7735_MADCTRL_COLOR 0x00 #else #define ST7735_MADCTRL_COLOR 0x08 #endif #if ST7735_SHIFTED_COORDS #define ST7735_COL_SHIFT 2 #define ST7735_ROW_SHIFT 1 #else #define ST7735_COL_SHIFT 0 #define ST7735_ROW_SHIFT 0 #endif #include "drivers/gdisp/ST7735/ST7735.h" // Some common routines and macros #define dummy_read(g) { volatile uint16_t dummy; dummy = read_data(g); (void) dummy; } #define write_reg(g, reg, data) { write_cmd(g, reg); write_data(g, data); } // Serial write data for fast fill. #ifndef write_data_repeat #define write_data_repeat(g, data, count) { int i; for (i = 0; i < count; ++i) write_data (g, data) } #endif // Commands list copied from https://github.com/adafruit/Adafruit-ST7735-Library #define DELAY 0x80 #if ST7735_TYPE_B static const unsigned char init_cmds[] = { // Initialization commands for 7735B screens 16, // 16 commands in list: ST7735_SWRESET, DELAY, // 1: Software reset, no args, w/delay 50, // 50 ms delay ST7735_SLPOUT , DELAY, // 2: Out of sleep mode, no args, w/delay 255, // 255 = 500 ms delay ST7735_COLMOD , 1+DELAY, // 3: Set color mode, 1 arg + delay: 0x05, // 16-bit color 10, // 10 ms delay ST7735_FRMCTR1, 3+DELAY, // 4: Frame rate control, 3 args + delay: 0x00, // fastest refresh 0x06, // 6 lines front porch 0x03, // 3 lines back porch 10, // 10 ms delay ST7735_MADCTL , 1 , // 5: Memory access ctrl (directions), 1 arg: ST7735_MADCTRL_COLOR, // Row addr/col addr, bottom to top refresh ST7735_DISSET5, 2 , // 6: Display settings #5, 2 args, no delay: 0x15, // 1 clk cycle nonoverlap, 2 cycle gate // rise, 3 cycle osc equalize 0x02, // Fix on VTL ST7735_INVCTR , 1 , // 7: Display inversion control, 1 arg: 0x0, // Line inversion ST7735_PWCTR1 , 2+DELAY, // 8: Power control, 2 args + delay: 0x02, // GVDD = 4.7V 0x70, // 1.0uA 10, // 10 ms delay ST7735_PWCTR2 , 1 , // 9: Power control, 1 arg, no delay: 0x05, // VGH = 14.7V, VGL = -7.35V ST7735_PWCTR3 , 2 , // 10: Power control, 2 args, no delay: 0x01, // Opamp current small 0x02, // Boost frequency ST7735_VMCTR1 , 2+DELAY, // 11: Power control, 2 args + delay: 0x3C, // VCOMH = 4V 0x38, // VCOML = -1.1V 10, // 10 ms delay ST7735_PWCTR6 , 2 , // 12: Power control, 2 args, no delay: 0x11, 0x15, ST7735_GMCTRP1,16 , // 13: Magical unicorn dust, 16 args, no delay: 0x09, 0x16, 0x09, 0x20, // (seriously though, not sure what 0x21, 0x1B, 0x13, 0x19, // these config values represent) 0x17, 0x15, 0x1E, 0x2B, 0x04, 0x05, 0x02, 0x0E, ST7735_GMCTRN1,16+DELAY, // 14: Sparkles and rainbows, 16 args + delay: 0x0B, 0x14, 0x08, 0x1E, // (ditto) 0x22, 0x1D, 0x18, 0x1E, 0x1B, 0x1A, 0x24, 0x2B, 0x06, 0x06, 0x02, 0x0F, 10, // 10 ms delay ST7735_NORON , DELAY, // 17: Normal display on, no args, w/delay 10, // 10 ms delay ST7735_DISPON , DELAY, // 18: Main screen turn on, no args, w/delay 255 }; // 255 = 500 ms delay #elif ST7735_TYPE_R static const unsigned char init_cmds[] = { // Init for 7735R, part 1 (red or green tab) 19, // 19 commands in list: ST7735_SWRESET, DELAY, // 1: Software reset, 0 args, w/delay 150, // 150 ms delay ST7735_SLPOUT , DELAY, // 2: Out of sleep mode, 0 args, w/delay 255, // 500 ms delay ST7735_FRMCTR1, 3 , // 3: Frame rate ctrl - normal mode, 3 args: 0x00, 0x0, 0x0, // Rate = fosc/(0+40) * (LINE+0+0) ST7735_FRMCTR2, 3 , // 4: Frame rate control - idle mode, 3 args: 0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D) ST7735_FRMCTR3, 6 , // 5: Frame rate ctrl - partial mode, 6 args: 0x01, 0x2C, 0x2D, // Dot inversion mode 0x01, 0x2C, 0x2D, // Line inversion mode ST7735_INVCTR , 1 , // 6: Display inversion ctrl, 1 arg, no delay: 0x07, // No inversion ST7735_PWCTR1 , 3 , // 7: Power control, 3 args, no delay: 0xA2, 0x02, // -4.6V 0x44, // mode 3 ST7735_PWCTR2 , 1 , // 8: Power control, 1 arg, no delay: 0xC5, // VGH25 = 2.4C VGSEL = -10 VGH = 3 * AVDD ST7735_PWCTR3 , 2 , // 9: Power control, 2 args, no delay: 0x0A, // Opamp current small 0x00, // Boost frequency ST7735_PWCTR4 , 2 , // 10: Power control, 2 args, no delay: 0x8A, // BCLK/2, Opamp current small & Medium low 0x2A, ST7735_PWCTR5 , 2 , // 11: Power control, 2 args, no delay: 0x8A, 0xEE, ST7735_VMCTR1 , 1 , // 12: Power control, 1 arg, no delay: 0x0E, ST7735_INVOFF , 0 , // 13: Don't invert display, no args, no delay ST7735_MADCTL , 1 , // 14: Memory access control (directions), 1 arg: 0xC0|ST7735_MADCTRL_COLOR, // row addr/col addr, bottom to top refresh ST7735_COLMOD , 1 , // 15: set color mode, 1 arg, no delay: 0x05, // 16-bit color ST7735_GMCTRP1, 16 , // 1: Magical unicorn dust, 16 args, no delay: 0x02, 0x1c, 0x07, 0x12, 0x37, 0x32, 0x29, 0x2d, 0x29, 0x25, 0x2B, 0x39, 0x00, 0x01, 0x03, 0x10, ST7735_GMCTRN1, 16 , // 2: Sparkles and rainbows, 16 args, no delay: 0x03, 0x1d, 0x07, 0x06, 0x2E, 0x2C, 0x29, 0x2D, 0x2E, 0x2E, 0x37, 0x3F, 0x00, 0x00, 0x02, 0x10, ST7735_NORON , DELAY, // 3: Normal display on, no args, w/delay 10, // 10 ms delay ST7735_DISPON , DELAY, // 4: Main screen turn on, no args w/delay 100 }; // 100 ms delay #endif static void execute_cmds (const uint8_t *addr) { unsigned int cmds = *addr++; while (cmds--) { write_cmd (g, *addr++); unsigned int args = *addr++; unsigned int ms = args & DELAY; args &= ~DELAY; while(args--) write_data_byte (g,*addr++); if (ms) { ms = *addr++; gfxSleepMilliseconds(ms==255?500:ms); } } } 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); execute_cmds (init_cmds); release_bus(g); // Finish Init post_init_board(g); /* Turn on the back-light */ set_backlight(g, GDISP_INITIAL_BACKLIGHT); /* 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; } static void set_viewport(GDisplay *g) { write_cmd (g, ST7735_CASET); write_data (g, g->p.x+ST7735_COL_SHIFT); write_data (g, g->p.x+g->p.cx-1+ST7735_COL_SHIFT); write_cmd (g, ST7735_RASET); write_data (g, g->p.y+ST7735_ROW_SHIFT); write_data (g, g->p.y+g->p.cy-1+ST7735_ROW_SHIFT); write_cmd (g, ST7735_RAMWR); } #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) { LLDCOLOR_TYPE c; c = gdispColor2Native(g->p.color); write_data(g, c ); } LLDSPEC void gdisp_lld_write_stop(GDisplay *g) { release_bus(g); } #endif LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) { set_viewport(g); gdisp_lld_write_color (g); } #if GDISP_HARDWARE_FILLS LLDSPEC void gdisp_lld_fill_area(GDisplay *g) { LLDCOLOR_TYPE c = gdispColor2Native(g->p.color); acquire_bus(g); set_viewport (g); write_data_repeat (g,c,g->p.cx*g->p.cy); release_bus(g); } #endif // GDISP_HARDWARE_FILLS #if 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); // not implemented release_bus(); set_backlight(g, 0); break; case powerSleep: case powerDeepSleep: // not implemented acquire_bus(g); release_bus(g); set_backlight(g, 0); break; case powerOn: acquire_bus(g); // not implemented release_bus(g); set_backlight(g, g->g.Backlight); 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; switch((orientation_t)g->p.ptr) { case GDISP_ROTATE_0: acquire_bus(g); write_cmd(g, ST7735_MADCTL); write_data_byte(g, 0xC0|ST7735_MADCTRL_COLOR); g->g.Height = GDISP_SCREEN_HEIGHT; g->g.Width = GDISP_SCREEN_WIDTH; release_bus(g); break; case GDISP_ROTATE_90: acquire_bus(g); write_cmd(g, ST7735_MADCTL); write_data_byte(g, 0xA0|ST7735_MADCTRL_COLOR); g->g.Height = GDISP_SCREEN_WIDTH; g->g.Width = GDISP_SCREEN_HEIGHT; release_bus(g); break; case GDISP_ROTATE_180: acquire_bus(g); write_cmd(g, ST7735_MADCTL); write_data_byte(g, 0x00|ST7735_MADCTRL_COLOR); g->g.Height = GDISP_SCREEN_HEIGHT; g->g.Width = GDISP_SCREEN_WIDTH; release_bus(g); break; case GDISP_ROTATE_270: acquire_bus(g); write_cmd(g, ST7735_MADCTL); write_data_byte(g, 0x60|ST7735_MADCTRL_COLOR); g->g.Height = GDISP_SCREEN_WIDTH; g->g.Width = GDISP_SCREEN_HEIGHT; release_bus(g); 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; default: return; } } #endif #endif /* GFX_USE_GDISP */