aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/gdisp/SSD1351/gdisp_lld_SSD1351.c
blob: 762eac19d1906aa5585c7ba14816d2e5ceeddeb3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
/*
 * 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
 */

#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_SSD1351
#include "gdisp_lld_config.h"
#include "../../../src/gdisp/gdisp_driver.h"

#include "board_SSD1351.h"

/*===========================================================================*/
/* Driver local definitions.                                                 */
/*===========================================================================*/

#ifndef GDISP_SCREEN_HEIGHT
	#define GDISP_SCREEN_HEIGHT		128
#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

#include "SSD1351.h"

/*===========================================================================*/
/* Driver local functions.                                                   */
/*===========================================================================*/

// 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); }

/*===========================================================================*/
/* Driver exported functions.                                                */
/*===========================================================================*/

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);

	write_reg(g, 0xFD, 0x12); // unlock OLED driver IC
	write_reg(g, 0xFD, 0xB1); // make commands A1, B1, B3, BB, BE, C1 accesible in unlocked state
	write_cmd(g, 0xAE); // sleep mode ON (display off)
	write_reg(g, 0xB3, 0xF1); // Front clock divider / osc freq - Osc = 0xF; div = 2
	write_reg(g, 0xCA, 127); // set MUX ratio
	write_reg(g, 0xA0, 0b01110100);	 // Set re-map / color depth
	// [0] : address increment (0: horizontal, 1: vertical, reset 0)
	// [1] : column remap (0: 0..127, 1: 127..0, reset 0)
	// [2] : color remap (0: A->B->C, 1: C->B->A, reset 0)
	// [3] : reserved
	// [4] : column scan direction (0: top->down, 1: bottom->up, reset 0)
	// [5] : odd/even split COM (0: disable, 1: enable, reset 1)
	// [6..7] : color depth (00,01: 65k, 10: 262k, 11: 262k format 2)

	write_cmd(g, 0x15); // Set Column address
	write_data(g, 0x00); // start
	write_data(g, 0x7F); // end

	write_cmd(g, 0x75); // set row address
	write_data(g, 0x00); // start
	write_data(g, 0x7F); // end

	write_reg(g, 0xA1, 0x00); // set display start line - 0
	write_reg(g, 0xA2, 0x00); // set display offset - 0
	write_reg(g, 0xB5, 0x00); // set GPIO - both HiZ, input disabled
	write_reg(g, 0xAB, 0x01); // enable internal VDD regulator
	write_reg(g, 0xB1, 0x32); // set reset / pre-charge period - phase 2: 3 DCLKs, phase 1: 5 DCLKs
	write_reg(g, 0xBE, 0x05); // set VComH voltage - 0.82*Vcc
	write_reg(g, 0xBB, 0x17); // set pre-charge voltage - 0.6*Vcc
	write_cmd(g, 0xA6); // set display mode: reset to normal display

	write_cmd(g, 0xC1); // set contrast current for A,B,C
	write_data(g, 0xC8);
	write_data(g, 0x80);
	write_data(g, 0xC8);

	write_reg(g, 0xC7, 0x0F); // master contrast current control - no change

	write_cmd(g, 0xB4); // set segment low voltage
	write_data(g, 0xA0); // external VSL
	write_data(g, 0xB5); // hard value
	write_data(g, 0x55); // hard value

	write_reg(g, 0xB6, 0x01); // set second pre-charge period - 1 DCLKs
	write_cmd(g, 0xAF); // sleep mode OFF (display on)
	write_cmd(g, 0x5C); // write to RAM

    // Finish Init
    post_init_board(g);

 	// Release the bus
	release_bus(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 = gPowerOn;
	g->g.Backlight = GDISP_INITIAL_BACKLIGHT;
	g->g.Contrast = GDISP_INITIAL_CONTRAST;
	return gTrue;
}

#if GDISP_HARDWARE_STREAM_WRITE
	LLDSPEC	void gdisp_lld_write_start(GDisplay *g) {
		acquire_bus(g);
		write_cmd(g, SSD1351_SET_COLUMN_ADDRESS);
		write_data(g, g->p.x);
		write_data(g, g->p.x + g->p.cx - 1);
		write_cmd(g, SSD1351_SET_ROW_ADDRESS);
		write_data(g, g->p.y);
		write_data(g, g->p.y + g->p.cy - 1);
		write_cmd(g, SSD1351_WRITE_RAM);
	}
	LLDSPEC	void gdisp_lld_write_color(GDisplay *g) {
		LLDCOLOR_TYPE	c;

		c = gdispColor2Native(g->p.color);
		write_data(g, c >> 8);
		write_data(g, c & 0xFF);
	}
	LLDSPEC	void gdisp_lld_write_stop(GDisplay *g) {
		release_bus(g);
	}
#endif

#if GDISP_HARDWARE_STREAM_READ
	#error "SSD1351 - Stream Read is not supported yet"
	LLDSPEC	void gdisp_lld_read_start(GDisplay *g) {
		acquire_bus(g);
		//set_viewport(g);
		//write_index(g, 0x2E);
		setreadmode(g);
		//dummy_read(g);
	}
	LLDSPEC	gColor gdisp_lld_read_color(GDisplay *g) {
		uint16_t	data;

		data = read_data(g);
		return gdispNative2Color(data);
	}
	LLDSPEC	void gdisp_lld_read_stop(GDisplay *g) {
		setwritemode(g);
		release_bus(g);
	}
#endif

#if GDISP_NEED_CONTROL && GDISP_HARDWARE_CONTROL
	#error "SSD1351 - Hardware control is not supported yet"
	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:
			case gPowerSleep:
			case gPowerDeepSleep:
				acquire_bus(g);
				//TODO
				release_bus(g);
				break;
			case gPowerOn:
				acquire_bus(g);
				//TODO
				release_bus(g);
				break;
			default:
				return;
			}
			g->g.Powermode = (gPowermode)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);
				//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;

        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;

		//case GDISP_CONTROL_CONTRAST:
        default:
            return;
		}
	}
#endif

#endif /* GFX_USE_GDISP */