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
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
/*
* 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 /*|| defined(__DOXYGEN__)*/
#define GDISP_DRIVER_VMT GDISPVMT_RA8875
#include "gdisp_lld_config.h"
#include "../../../src/gdisp/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 GFXINLINE void set_cursor(GDisplay *g) {
write_reg16(g, 0x46, g->p.x);
write_reg16(g, 0x48, g->p.y);
write_index(g, 0x02);
}
static GFXINLINE 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 GFXINLINE 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 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);
// 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 = gOrientation0;
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);
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 == (gPowermode)g->p.ptr)
return;
switch((gPowermode)g->p.ptr) {
case gPowerOff:
acquire_bus(g);
// TODO
release_bus(g);
break;
case gPowerOn:
acquire_bus(g);
// TODO
release_bus(g);
break;
case gPowerSleep:
acquire_bus(g);
// TODO
release_bus(g);
break;
default:
return;
}
g->g.Powermode = (gPowermode)g->p.ptr;
return;
#endif
#if 0
case GDISP_CONTROL_ORIENTATION:
if (g->g.Orientation == (gOrientation)g->p.ptr)
return;
switch((gOrientation)g->p.ptr) {
case gOrientation0:
acquire_bus(g);
// TODO
release_bus(g);
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Width = GDISP_SCREEN_WIDTH;
break;
case gOrientation90:
acquire_bus(g);
// TODO
release_bus(g);
g->g.Height = GDISP_SCREEN_WIDTH;
g->g.Width = GDISP_SCREEN_HEIGHT;
break;
case gOrientation180:
acquire_bus(g);
// TODO
release_bus(g);
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Width = GDISP_SCREEN_WIDTH;
break;
case gOrientation270:
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 = (gOrientation)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 */
|
