1+ /*
2+ This file is part of IngenicHAL.
3+ Copyright (C) 2022 Reimu NotMoe <[email protected] > 4+
5+ This program is free software: you can redistribute it and/or modify
6+ it under the terms of the GNU Affero General Public License as
7+ published by the Free Software Foundation, either version 3 of the
8+ License, or (at your option) any later version.
9+
10+ This program is distributed in the hope that it will be useful,
11+ but WITHOUT ANY WARRANTY; without even the implied warranty of
12+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13+ GNU Affero General Public License for more details.
14+
15+ You should have received a copy of the GNU Affero General Public License
16+ along with this program. If not, see <https://www.gnu.org/licenses/>.
17+ */
18+
19+ #include <ingenic-hal.h>
20+
21+ volatile XHAL_GPIO_TypeDef * xgpioa , * xgpiob , * xgpioc , * xgpiod ;
22+
23+ // Use this if you have a 16-bit RGB LCD is connected to PB<15:0>
24+ // ffmpeg -vcodec png -i logo.png -vcodec rawvideo -f rawvideo -pix_fmt bgr565le logo.raw
25+ #define LOGO_BGR565LE
26+
27+ // Use this if you have a 24-bit RGB LCD is connected to PB<24:0>, or a 16-bit RGB LCD with each color aligned to MSB
28+ // ffmpeg -vcodec png -i logo.png -vcodec rawvideo -f rawvideo -pix_fmt bgra logo.raw
29+ //#define LOGO_BGRA8888
30+
31+ // Snatch GPIO back from Linux
32+ //#define ENABLE_GPIO_SNATCH
33+
34+ #if defined(LOGO_BGR565LE )
35+ #define logo_pixel_t uint16_t
36+ #define lcd_DATA lcd_DATA16
37+ #elif defined(LOGO_BGRA8888 )
38+ #define logo_pixel_t uint32_t
39+ #define lcd_DATA lcd_DATA24
40+ #endif
41+
42+ // The logo file should be placed at 127MiB of DRAM
43+ // The mini core has no MMU, so all addresses are in physical
44+ volatile logo_pixel_t * logo = (void * )0x07F00000 ;
45+ uint32_t logo_pos = 0 ;
46+
47+ logo_pixel_t lcd_Color () {
48+ logo_pixel_t ret = logo [logo_pos ];
49+ logo_pos ++ ;
50+
51+ return ret ;
52+ }
53+
54+ int lcd_gpio_changed () {
55+ if (xgpiob -> PAT1 & (1 << 27 )) {
56+ return 1 ;
57+ }
58+
59+ return 0 ;
60+ }
61+
62+ void lcd_gpio_init (void ) {
63+ int i ;
64+ for (i = 0 ; i <=27 ; i ++ ) {
65+ XHAL_GPIO_SetAsGPIO (xgpiob , i , 0 );
66+ }
67+ }
68+
69+ void lcd_DATA16 (uint16_t v ) {
70+ xgpiob -> PAT0C = 0xffff ;
71+ xgpiob -> PAT0S = v ;
72+ }
73+
74+ void lcd_DATA24 (uint32_t v ) {
75+ xgpiob -> PAT0C = 0xffffff ;
76+ xgpiob -> PAT0S = v & 0xffffff ;
77+ }
78+
79+ void lcd_DE (int v ) {
80+ XHAL_GPIO_WritePin (xgpiob , 27 , v );
81+ }
82+
83+ void lcd_PCLK (int v ) {
84+ XHAL_GPIO_WritePin (xgpiob , 24 , v );
85+ }
86+
87+ void lcd_VSYNC (int v ) {
88+ XHAL_GPIO_WritePin (xgpiob , 25 , v );
89+ }
90+
91+ void lcd_HSYNC (int v ) {
92+ XHAL_GPIO_WritePin (xgpiob , 26 , v );
93+ }
94+
95+ void lcd_init () {
96+ lcd_gpio_init ();
97+
98+ lcd_VSYNC (1 );
99+ lcd_HSYNC (1 );
100+ lcd_DE (0 );
101+ lcd_PCLK (0 );
102+ }
103+
104+ uint32_t resX = 480 , resY = 272 ;
105+
106+ uint32_t Tvpw = 1 ; /* VSYNC Width */
107+ uint32_t Tvbp = 11 ; /* VSYNC Back Porch */
108+ uint32_t Tvfp = 13 ; /* VSYNC Front Porch */
109+
110+ uint32_t Thpw = 8 ; /* HSYNC Width */
111+ uint32_t Thbp = 35 ; /* HSYNC Back Porch */
112+ uint32_t Thfp = 40 ; /* HSYNC Front Porch */
113+
114+ //uint32_t resX = 800, resY = 480;
115+ //
116+ //uint32_t Tvpw = 3; /* VSYNC Width */
117+ //uint32_t Tvbp = 32; /* VSYNC Back Porch */
118+ //uint32_t Tvfp = 13; /* VSYNC Front Porch */
119+ //
120+ //uint32_t Thpw = 48; /* HSYNC Width */
121+ //uint32_t Thbp = 88; /* HSYNC Back Porch */
122+ //uint32_t Thfp = 40; /* HSYNC Front Porch */
123+
124+ void lcd_flip_PCLK () {
125+ lcd_PCLK (1 );
126+ lcd_PCLK (0 );
127+ }
128+
129+ void lcd_BlastLine (int DE_needs_change ) {
130+ uint32_t i ;
131+
132+ lcd_HSYNC (0 );
133+ for (i = 0 ; i < Thpw ; i ++ ) {
134+ lcd_flip_PCLK ();
135+ }
136+
137+ lcd_HSYNC (1 );
138+ for (i = 0 ; i < Thbp ; i ++ ) {
139+ lcd_flip_PCLK ();
140+ }
141+
142+ if (DE_needs_change )
143+ lcd_DE (1 );
144+
145+ for (i = 0 ; i < resX ; i ++ ) {
146+ if (DE_needs_change ) {
147+ lcd_DATA (lcd_Color ());
148+ }
149+ lcd_flip_PCLK ();
150+ }
151+
152+ if (DE_needs_change )
153+ lcd_DE (0 );
154+
155+ for (i = 0 ; i < Thfp ; i ++ ) {
156+ lcd_flip_PCLK ();
157+ }
158+
159+ };
160+
161+ void lcd_BlastScreen () {
162+ uint32_t i ;
163+
164+
165+ lcd_VSYNC (0 );
166+ for (i = 0 ; i < Tvpw ; i ++ ) {
167+ lcd_BlastLine (0 );
168+ }
169+
170+ lcd_VSYNC (1 );
171+ for (i = 0 ; i < Tvbp ; i ++ ) {
172+ lcd_BlastLine (0 );
173+ }
174+
175+ for (i = 0 ; i < resY ; i ++ ) {
176+ lcd_BlastLine (1 );
177+ }
178+
179+ for (i = 0 ; i < Tvfp ; i ++ ) {
180+ lcd_BlastLine (0 );
181+ }
182+
183+ }
184+
185+ int main () {
186+ xgpioa = (volatile void * )(XHAL_PHYSADDR_GPIO + XHAL_REGWIDTH_GPIO_PORT * 0 );
187+ xgpiob = (volatile void * )(XHAL_PHYSADDR_GPIO + XHAL_REGWIDTH_GPIO_PORT * 1 );
188+ xgpioc = (volatile void * )(XHAL_PHYSADDR_GPIO + XHAL_REGWIDTH_GPIO_PORT * 2 );
189+ xgpiod = (volatile void * )(XHAL_PHYSADDR_GPIO + XHAL_REGWIDTH_GPIO_PORT * 3 );
190+
191+ lcd_init ();
192+
193+ while (1 ) {
194+ lcd_BlastScreen ();
195+
196+ #ifdef ENABLE_GPIO_SNATCH
197+ if (lcd_gpio_changed ()) {
198+ lcd_gpio_init ();
199+ }
200+ #endif
201+
202+ logo_pos = 0 ;
203+ }
204+ }
0 commit comments