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comparison: components/u8g2/csrc/u8x8_d_ist7920.c

components/u8g2/csrc/u8x8_d_ist7920.c

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1 /*
2
3 u8x8_d_ist7920.c
4
5 this is NOT ST7920!
6
7 Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
8
9 Copyright (c) 2019, olikraus@gmail.com
10 All rights reserved.
11
12 Redistribution and use in source and binary forms, with or without modification,
13 are permitted provided that the following conditions are met:
14
15 * Redistributions of source code must retain the above copyright notice, this list
16 of conditions and the following disclaimer.
17
18 * Redistributions in binary form must reproduce the above copyright notice, this
19 list of conditions and the following disclaimer in the documentation and/or other
20 materials provided with the distribution.
21
22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
23 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
24 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
27 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
31 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
32 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
34 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35
36
37 */
38 #include "u8x8.h"
39
40
41
42
43 static const uint8_t u8x8_d_ist7920_128x128_powersave0_seq[] = {
44 U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
45 U8X8_C(0x03d), /* display on */
46 U8X8_END_TRANSFER(), /* disable chip */
47 U8X8_END() /* end of sequence */
48 };
49
50 static const uint8_t u8x8_d_ist7920_128x128_powersave1_seq[] = {
51 U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
52 U8X8_C(0x03c), /* display off */
53 U8X8_END_TRANSFER(), /* disable chip */
54 U8X8_END() /* end of sequence */
55 };
56
57 static const uint8_t u8x8_d_ist7920_128x128_flip0_seq[] = {
58 U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
59 U8X8_C(0x064), /* Display Ctrl: Bit3: SHL 2:ADC 1:EON, 0:REV */
60 U8X8_END_TRANSFER(), /* disable chip */
61 U8X8_END() /* end of sequence */
62 };
63
64 static const uint8_t u8x8_d_ist7920_128x128_flip1_seq[] = {
65 U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
66 U8X8_C(0x068), /* Display Ctrl: Bit3: SHL 2:ADC 1:EON, 0:REV */
67 U8X8_END_TRANSFER(), /* disable chip */
68 U8X8_END() /* end of sequence */
69 };
70
71
72 static const u8x8_display_info_t u8x8_ist7920_128x128_display_info =
73 {
74 /* chip_enable_level = */ 0,
75 /* chip_disable_level = */ 1,
76
77 /* post_chip_enable_wait_ns = */ 90, /* IST7920 datasheet, page 48 */
78 /* pre_chip_disable_wait_ns = */ 90, /* IST7920 datasheet, page 48 */
79 /* reset_pulse_width_ms = */ 10,
80 /* post_reset_wait_ms = */ 20, /* IST7920 Startup Seq.. */
81 /* sda_setup_time_ns = */ 45, /* IST7920 datasheet, page 48 */
82 /* sck_pulse_width_ns = */ 130, /* IST7920 datasheet, page 48 */
83 /* sck_clock_hz = */ 3000000UL, /* IST7920 datasheet: 260ns */
84 /* spi_mode = */ 0, /* active high, rising edge (not verified) */
85 /* i2c_bus_clock_100kHz = */ 4, /* 400kHz according to IST7920 datasheet */
86 /* data_setup_time_ns = */ 60, /* IST7920 datasheet, page 47 */
87 /* write_pulse_width_ns = */ 150, /* IST7920 datasheet, page 47 */
88 /* tile_width = */ 16, /* width of 16*8=128 pixel */
89 /* tile_hight = */ 16,
90 /* default_x_offset = */ 0,
91 /* flipmode_x_offset = */ 0,
92 /* pixel_width = */ 128,
93 /* pixel_height = */ 128
94 };
95
96 /* 1/128 Duty, 1/10 Bias, 128x128 round display */
97 static const uint8_t u8x8_d_ist7920_128x128_init_seq[] = {
98
99 U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
100
101 U8X8_C(0x076), /* Software Reset */
102 U8X8_DLY(50),
103 U8X8_C(0x03c), /* display off */
104
105
106 U8X8_CA(0x090, 128), /* Set Duty */
107 //U8X8_CAA(0x0b2, 0x011, 0x00), /* Set Frame Control */
108
109 U8X8_CA(0x030, 16), /* Set Bias 0: 1/8, 8: 1/9, 16: 1/10, 24: 1/11, 48: 1/12 ... */
110 U8X8_CA(0x031, 0x03f), /* Set voltage generate clock(31H/11H) */
111 //U8X8_CA(0x032, 0x015), /* Temperature compensation */
112 U8X8_CA(0x033, 0x020), /* Power Control */
113 U8X8_DLY(100),
114 U8X8_CA(0x033, 0x02c), /* Power Control */
115 U8X8_DLY(100),
116 U8X8_C(0xfd), /* set booster */
117 U8X8_DLY(100),
118 U8X8_CA(0x033, 0x02f), /* Power Control */
119 U8X8_DLY(200),
120
121 U8X8_C(0x064), /* Display Ctrl: Bit3: SHL 2:ADC 1:EON, 0:REV */
122
123 U8X8_CAA(0x074, 0x000, 0x00f), /* AY Window */
124 U8X8_CAA(0x075, 0x000, 0x07f), /* AX Window */
125
126 U8X8_CA(0x040, 64), /* Start line at 64 */
127
128 U8X8_CA(0x0b1, 100), /* electronic volume */
129
130
131 U8X8_END_TRANSFER(), /* disable chip */
132 U8X8_END() /* end of sequence */
133 };
134
135 uint8_t u8x8_d_ist7920_128x128(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
136 {
137 uint8_t x, c;
138 uint8_t *ptr;
139 switch(msg)
140 {
141 case U8X8_MSG_DISPLAY_SETUP_MEMORY:
142 u8x8_d_helper_display_setup_memory(u8x8, &u8x8_ist7920_128x128_display_info);
143 break;
144 case U8X8_MSG_DISPLAY_INIT:
145 u8x8_d_helper_display_init(u8x8);
146 u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_init_seq);
147 break;
148 case U8X8_MSG_DISPLAY_SET_POWER_SAVE:
149 if ( arg_int == 0 )
150 u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_powersave0_seq);
151 else
152 u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_powersave1_seq);
153 break;
154 case U8X8_MSG_DISPLAY_SET_FLIP_MODE:
155 if ( arg_int == 0 )
156 {
157 u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_flip0_seq);
158 u8x8->x_offset = u8x8->display_info->default_x_offset;
159 }
160 else
161 {
162 u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_flip1_seq);
163 u8x8->x_offset = u8x8->display_info->flipmode_x_offset;
164 }
165 break;
166 #ifdef U8X8_WITH_SET_CONTRAST
167 case U8X8_MSG_DISPLAY_SET_CONTRAST:
168 u8x8_cad_StartTransfer(u8x8);
169 u8x8_cad_SendCmd(u8x8, 0x0b1 );
170 u8x8_cad_SendArg(u8x8, arg_int ); /* st7920 has range from 0 to 255 */
171 u8x8_cad_EndTransfer(u8x8);
172 break;
173 #endif
174 case U8X8_MSG_DISPLAY_DRAW_TILE:
175 u8x8_cad_StartTransfer(u8x8);
176
177 x = ((u8x8_tile_t *)arg_ptr)->x_pos;
178 x *= 8;
179 x += u8x8->x_offset;
180 u8x8_cad_SendCmd(u8x8, 0x0c0 );
181 u8x8_cad_SendArg(u8x8, x );
182 u8x8_cad_SendCmd(u8x8, 0x001 );
183 u8x8_cad_SendArg(u8x8, (((u8x8_tile_t *)arg_ptr)->y_pos) );
184
185 c = ((u8x8_tile_t *)arg_ptr)->cnt;
186 c *= 8;
187 ptr = ((u8x8_tile_t *)arg_ptr)->tile_ptr;
188 do
189 {
190 u8x8_cad_SendData(u8x8, c, ptr); /* note: SendData can not handle more than 255 bytes */
191 arg_int--;
192 } while( arg_int > 0 );
193
194 u8x8_cad_EndTransfer(u8x8);
195 break;
196 default:
197 return 0;
198 }
199 return 1;
200 }
201
202

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