1 /*
2 * lws abstract display implementation for ili9341 on spi
3 *
4 * Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25 #include <private-lib-core.h>
26 #include <drivers/devices/display/ili9341.h>
27
28
29 static uint8_t ili9341_320x240_init[] = {
30 /*
31 * This provides 70Hz 320x240 at RGB565, we assume im[3:0] is 1110
32 * which is 4-bit SPI
33 */
34
35 3, ILI9341_FACPWCTRB, 0x00, 0x83, 0x30,
36 4, ILI9341_FACDRTIMCTRA, 0x64, 0x03, 0x12, 0x81,
37 3, ILI9341_FACPWCTRA, 0x85, 0x01, 0x79,
38 5, ILI9341_FACPUMPRAT, 0x39, 0x2c, 0x00, 0x34, 0x02,
39 1, ILI9341_FACDRTIMCTR, 0x20,
40 2, ILI9341_FACPWCTR1, 0x00, 0x00,
41
42 1, ILI9341_PWCTR1, 0x26,
43 1, ILI9341_PWCTR2, 0x11,
44 2, ILI9341_VMCTR1, 0x35, 0x3e,
45 1, ILI9341_VMCTR2, 0xbe,
46 1, ILI9341_MADCTL, 0x28,
47 1, ILI9341_VSCRSADD, 0x00,
48 1, ILI9341_PIXFMT, 0x55,
49 2, ILI9341_FRMCTR1, 0x00, 0x1b,
50 1, ILI9341_FACSETGAMMACRV, 0x00,
51 1, ILI9341_GAMMASET, 0x01,
52 15, ILI9341_GMCTRP1, 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e,
53 0xf1, 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09,
54 0x00,
55 15, ILI9341_GMCTRN1, 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31,
56 0xc1, 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36,
57 0x0f,
58 4, ILI9341_DFUNCTR, 0x0a, 0x82, 0x27, 0x00,
59 };
60
61 int
lws_display_ili9341_spi_init(const struct lws_display * disp)62 lws_display_ili9341_spi_init(const struct lws_display *disp)
63 {
64 const lws_display_ili9341_t *ili = (const lws_display_ili9341_t *)disp;
65 lws_spi_desc_t desc;
66 size_t pos = 0;
67 uint8_t u[8];
68
69 lwsl_user("%s\n", __func__);
70
71 /* hardware nRESET */
72
73 if (ili->gpio) {
74 ili->gpio->mode(ili->reset_gpio, LWSGGPIO_FL_WRITE |
75 LWSGGPIO_FL_PULLUP);
76 ili->gpio->set(ili->reset_gpio, 0);
77
78 lws_msleep(1);
79 ili->gpio->set(ili->reset_gpio, 1);
80 lws_msleep(1);
81 }
82
83 /*
84 * We cut the init table up into transactions... atm we just go with
85 * the fact that bb spi is synchronous, using async / dma we can't use
86 * a single desc on the stack like this
87 */
88
89 memset(&desc, 0, sizeof(desc));
90 desc.count_cmd = 1;
91
92 while (pos < LWS_ARRAY_SIZE(ili9341_320x240_init)) {
93 desc.count_write = ili9341_320x240_init[pos++];
94 desc.src = &ili9341_320x240_init[pos++];
95 desc.data = &ili9341_320x240_init[pos];
96 pos += desc.count_write;
97
98 ili->spi->queue(ili->spi, &desc);
99 }
100
101 u[0] = ILI9341_SLPOUT;
102 desc.src = &u[0];
103 desc.count_write = 0;
104 ili->spi->queue(ili->spi, &desc);
105
106 lws_msleep(5);
107
108 u[0] = ILI9341_DISPON;
109 ili->spi->queue(ili->spi, &desc);
110
111 return 0;
112 }
113
114 /* backlight handled by PWM */
115
116 int
lws_display_ili9341_spi_brightness(const struct lws_display * disp,uint8_t b)117 lws_display_ili9341_spi_brightness(const struct lws_display *disp, uint8_t b)
118 {
119 return 0;
120 }
121
122 int
lws_display_ili9341_spi_blit(const struct lws_display * disp,const uint8_t * src,lws_display_scalar x,lws_display_scalar y,lws_display_scalar w,lws_display_scalar h)123 lws_display_ili9341_spi_blit(const struct lws_display *disp, const uint8_t *src,
124 lws_display_scalar x, lws_display_scalar y,
125 lws_display_scalar w, lws_display_scalar h)
126 {
127 const lws_display_ili9341_t *ili = (const lws_display_ili9341_t *)disp;
128 lws_spi_desc_t desc;
129 uint8_t u[5];
130
131 memset(&desc, 0, sizeof(desc));
132 desc.count_cmd = 1;
133 desc.src = &u[0];
134 desc.count_write = 0;
135
136 /*
137 * Blit a line at a time
138 */
139
140 while (h--) {
141
142 u[0] = ILI9341_CASET;
143 desc.data = &u[1];
144 u[1] = x;
145 u[2] = x;
146 u[3] = w >> 8;
147 u[4] = w & 0xff;
148 desc.count_write = 4;
149 ili->spi->queue(ili->spi, &desc);
150
151 u[0] = ILI9341_PASET;
152 u[1] = y >> 8;
153 u[2] = y & 0xff;
154 u[3] = (y + 1) >> 8;
155 u[4] = (y + 1) & 0xff;
156 desc.count_write = 4;
157 ili->spi->queue(ili->spi, &desc);
158
159 u[0] = ILI9341_RAMWR;
160 desc.data = src;
161 desc.count_write = w * 2;
162 ili->spi->queue(ili->spi, &desc);
163 src += w * 2;
164 y++;
165 }
166
167 return 0;
168 }
169
170 int
lws_display_ili9341_spi_power(const struct lws_display * disp,int state)171 lws_display_ili9341_spi_power(const struct lws_display *disp, int state)
172 {
173
174 const lws_display_ili9341_t *ili = (const lws_display_ili9341_t *)disp;
175 lws_spi_desc_t desc;
176 uint8_t u[1];
177
178 memset(&desc, 0, sizeof(desc));
179 desc.count_cmd = 1;
180 desc.data = desc.src = &u[0];
181 u[0] = state ? ILI9341_SLPOUT : ILI9341_SLPIN;
182 ili->spi->queue(ili->spi, &desc);
183
184 /* we're not going to do anything useful for 5ms after this */
185
186 return 0;
187 }
188