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QMK/lib/ugfx/drivers/gdisp/ST7735/gdisp_lld_ST7735.c

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/*
* Created by Oleg Gerasimov <ogerasimov@gmail.com>
* 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"
#define BOARD_TYPE_B 1
#define BOARD_TYPE_R 2
#define BOARD_TYPE_R144 3
#include "board_ST7735.h"
#if !defined(ST7735_TYPE)
// Backward compatibility:
#if defined(ST7735_TYPE_R)
#define ST7735_TYPE BOARD_TYPE_R
#elif defined(ST7735_TYPE_B)
#define ST7735_TYPE BOARD_TYPE_B
#endif
#endif
#if !defined(ST7735_TYPE)
// It seems all modern boards is 7735R
#define ST7735_TYPE BOARD_TYPE_R
#endif
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
#ifndef GDISP_SCREEN_HEIGHT
#if ST7735_TYPE == BOARD_TYPE_R144
#define GDISP_SCREEN_HEIGHT 128
#else
#define GDISP_SCREEN_HEIGHT 160
#endif
#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 color packing, if not defined yet
#if !defined(ST7735_COLOR_RGB) && !defined(ST7735_COLOR_BRG)
// It seems most modern boards are RGB
#if ST7735_TYPE == BOARD_TYPE_R144
#define ST7735_COLOR_RGB GFXOFF
#else
#define ST7735_COLOR_RGB GFXON
#endif
#endif
#if ST7735_COLOR_RGB
#define ST7735_MADCTRL_COLOR 0x00
#else
#define ST7735_MADCTRL_COLOR 0x08
#endif
#if ST7735_TYPE == BOARD_TYPE_R144
#define ST7735_COL_SHIFT 2
#define ST7735_ROW_SHIFT 3
#elif defined(ST7735_SHIFTED_COORDS) && 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 gU16 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 == BOARD_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 == BOARD_TYPE_R) || (ST7735_TYPE == BOARD_TYPE_R144)
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: Gamma + Correction, 16 args, no delay:
0x02, 0x1c, 0x07, 0x12,
0x37, 0x32, 0x29, 0x2d,
0x29, 0x25, 0x2B, 0x39,
0x00, 0x01, 0x03, 0x10,
ST7735_GMCTRN1, 16 , // 2: Gamma - Correction, 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(GDisplay *g, const gU8 *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 gBool 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, gTrue);
gfxSleepMilliseconds(20);
setpin_reset(g, gFalse);
gfxSleepMilliseconds(20);
// Get the bus for the following initialisation commands
acquire_bus(g);
execute_cmds(g, 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 = gOrientation0;
g->g.Powermode = gPowerOn;
g->g.Backlight = GDISP_INITIAL_BACKLIGHT;
g->g.Contrast = GDISP_INITIAL_CONTRAST;
return gTrue;
}
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 == (gPowermode)g->p.ptr)
return;
switch((gPowermode)g->p.ptr) {
case gPowerOff:
acquire_bus(g);
// not implemented
release_bus(g);
set_backlight(g, 0);
break;
case gPowerSleep:
case gPowerDeepSleep:
// not implemented
acquire_bus(g);
release_bus(g);
set_backlight(g, 0);
break;
case gPowerOn:
acquire_bus(g);
// not implemented
release_bus(g);
set_backlight(g, g->g.Backlight);
break;
default:
return;
}
g->g.Powermode = (gPowermode)g->p.ptr;
return;
case GDISP_CONTROL_ORIENTATION:
if (g->g.Orientation == (gOrientation)g->p.ptr)
return;
switch((gOrientation)g->p.ptr) {
case gOrientation0:
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 gOrientation90:
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 gOrientation180:
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 gOrientation270:
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 = (gOrientation)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 */
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