Added ST7735 driver

4 files changed, 457 insertions, 0 deletions

diff --git a/drivers/gdisp/ST7735/driver.mk b/drivers/gdisp/ST7735/driver.mk
new file mode 100644
index 00000000..e7caf2cb
--- /dev/null
+++ b/drivers/gdisp/ST7735/driver.mk
@@ -0,0 +1,2 @@
+GFXINC += $(GFXLIB)/drivers/gdisp/ST7735
+GFXSRC += $(GFXLIB)/drivers/gdisp/ST7735/gdisp_lld_ST7735.c
diff --git a/drivers/gdisp/ST7735/gdisp_lld_ST7735.c b/drivers/gdisp/ST7735/gdisp_lld_ST7735.c
new file mode 100644
index 00000000..67f938b9
--- /dev/null
+++ b/drivers/gdisp/ST7735/gdisp_lld_ST7735.c
@@ -0,0 +1,381 @@
+/*
+ * Created by Oleg Gerasimov <ogerasimov@gmail.com>
+ * 14.08.2016
+ */
+ 
+#include "gfx.h"
+
+#if GFX_USE_GDISP
+
+#if defined(GDISP_SCREEN_HEIGHT)
+	#warning "GDISP: This low level driver does not support setting a screen size. It is being ignored."
+	#undef GISP_SCREEN_HEIGHT
+#endif
+#if defined(GDISP_SCREEN_WIDTH)
+	#warning "GDISP: This low level driver does not support setting a screen size. It is being ignored."
+	#undef GDISP_SCREEN_WIDTH
+#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:
+      0x01, 0x2C, 0x2D,       //     Rate = fosc/(1x2+40) * (LINE+2C+2D)
+    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
+      0x84,                   //     AUTO mode
+    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 */
diff --git a/drivers/gdisp/ST7735/gdisp_lld_config.h b/drivers/gdisp/ST7735/gdisp_lld_config.h
new file mode 100644
index 00000000..5c76924e
--- /dev/null
+++ b/drivers/gdisp/ST7735/gdisp_lld_config.h
@@ -0,0 +1,23 @@
+/*
+ * Created by Oleg Gerasimov <ogerasimov@gmail.com>
+ * 10.08.2016
+*/
+
+#ifndef _GDISP_LLD_CONFIG_H
+#define _GDISP_LLD_CONFIG_H
+
+#if GFX_USE_GDISP
+
+/*===========================================================================*/
+/* Driver hardware support.                                                  */
+/*===========================================================================*/
+
+#define GDISP_HARDWARE_STREAM_WRITE		TRUE
+#define GDISP_HARDWARE_CONTROL			TRUE
+#define GDISP_HARDWARE_FILLS			TRUE
+
+#define GDISP_LLD_PIXELFORMAT			GDISP_PIXELFORMAT_RGB565
+
+#endif	/* GFX_USE_GDISP */
+
+#endif	/* _GDISP_LLD_CONFIG_H */
diff --git a/drivers/gdisp/ST7735/st7735.h b/drivers/gdisp/ST7735/st7735.h
new file mode 100644
index 00000000..49967f9f
--- /dev/null
+++ b/drivers/gdisp/ST7735/st7735.h
@@ -0,0 +1,51 @@
+#ifndef _ST7735_H_
+#define _ST7735_H_
+
+#define ST7735_NOP     0x00
+#define ST7735_SWRESET 0x01
+#define ST7735_RDDID   0x04
+#define ST7735_RDDST   0x09
+
+#define ST7735_SLPIN   0x10
+#define ST7735_SLPOUT  0x11
+#define ST7735_PTLON   0x12
+#define ST7735_NORON   0x13
+
+#define ST7735_INVOFF  0x20
+#define ST7735_INVON   0x21
+#define ST7735_DISPOFF 0x28
+#define ST7735_DISPON  0x29
+#define ST7735_CASET   0x2A
+#define ST7735_RASET   0x2B
+#define ST7735_RAMWR   0x2C
+#define ST7735_RAMRD   0x2E
+
+#define ST7735_PTLAR   0x30
+#define ST7735_COLMOD  0x3A
+#define ST7735_MADCTL  0x36
+
+#define ST7735_FRMCTR1 0xB1
+#define ST7735_FRMCTR2 0xB2
+#define ST7735_FRMCTR3 0xB3
+#define ST7735_INVCTR  0xB4
+#define ST7735_DISSET5 0xB6
+
+#define ST7735_PWCTR1  0xC0
+#define ST7735_PWCTR2  0xC1
+#define ST7735_PWCTR3  0xC2
+#define ST7735_PWCTR4  0xC3
+#define ST7735_PWCTR5  0xC4
+#define ST7735_VMCTR1  0xC5
+
+#define ST7735_RDID1   0xDA
+#define ST7735_RDID2   0xDB
+#define ST7735_RDID3   0xDC
+#define ST7735_RDID4   0xDD
+
+#define ST7735_PWCTR6  0xFC
+
+#define ST7735_GMCTRP1 0xE0
+#define ST7735_GMCTRN1 0xE1
+
+#endif
+