forked from Panda381/PicoVGA
-
Notifications
You must be signed in to change notification settings - Fork 4
/
Copy pathvga_config.h
112 lines (97 loc) · 5.32 KB
/
vga_config.h
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
// ****************************************************************************
//
// VGA configuration
//
// ****************************************************************************
// === Configuration
#define LAYERS 4 // total layers 1..4 (1 base layer + 3 overlapped layers)
#define SEGMAX 8 // max. number of video segment per video strip (size of 1 sSegm = 28 bytes)
#define STRIPMAX 8 // max. number of video strips (size of 1 sStrip = sSegm size*SEGMAX+4 = 228 bytes)
// size of sScreen = sStrip size*STRIPMAX+4 = 1828 bytes
#define MAXX 640 // max. resolution in X direction (must be power of 4)
#define MAXY 480 // max. resolution in Y direction
#define MAXLINE 700 // max. number of scanlines (including sync and dark lines)
// === Scanline render buffers (800 pixels: default size of buffers = 2*4*(800+8+800+24)+800 = 13856 bytes
// Requirements by format, base layer 0, 1 wrap X segment:
// GF_GRAPH8 ... control buffer 16 bytes
// GF_TILE8 ... control buffer "width"+8 bytes
// GF_TILE16 ... control buffer "width/2"+8 bytes
// GF_TILE32 ... control buffer "width/4"+8 bytes
// GF_TILE64 ... control buffer "width/8"+8 bytes
// GF_PROGRESS ... control buffer 24 bytes
// other formats: data buffer "width" bytes, control buffer 16 bytes
#define DBUF0_MAX (MAXX+8) // max. size of data buffer of layer 0
#define CBUF0_MAX ((MAXX+24)/4) // max. size of control buffer of layer 0
// Requirements by format, overlapped layer 1..3:
// LAYERMODE_SPRITE* ... data buffer "width"+4 bytes, control buffer 24 bytes
// LAYERMODE_FASTSPRITE* ... data buffer "width"+4 bytes, control buffer up to "width*2"+16 bytes
// other formats ... data buffer 4 bytes, control buffer 24 bytes
#define DBUF1_MAX (MAXX+8) // max. size of data buffer of layer 1
#define CBUF1_MAX ((MAXX+24)/4) // max. size of control buffer of layer 1
#define DBUF2_MAX (MAXX+8) // max. size of data buffer of layer 2
#define CBUF2_MAX ((MAXX+24)/4) // max. size of control buffer of layer 2
#define DBUF3_MAX (MAXX+8) // max. size of data buffer of layer 3
#define CBUF3_MAX ((MAXX+24)/4) // max. size of control buffer of layer 3
#if LAYERS==1
#define DBUF_MAX DBUF0_MAX // max. size of data buffer
#define CBUF_MAX CBUF0_MAX // max. size of control buffer
#elif LAYERS==2
#define DBUF_MAX (DBUF0_MAX+DBUF1_MAX) // max. size of data buffer
#define CBUF_MAX (CBUF0_MAX+CBUF1_MAX) // max. size of control buffer
#elif LAYERS==3
#define DBUF_MAX (DBUF0_MAX+DBUF1_MAX+DBUF2_MAX) // max. size of data buffer
#define CBUF_MAX (CBUF0_MAX+CBUF1_MAX+CBUF2_MAX) // max. size of control buffer
#elif LAYERS==4
#define DBUF_MAX (DBUF0_MAX+DBUF1_MAX+DBUF2_MAX+DBUF3_MAX) // max. size of data buffer
#define CBUF_MAX (CBUF0_MAX+CBUF1_MAX+CBUF2_MAX+CBUF3_MAX) // max. size of control buffer
#else
#error Unsupported number of layers!
#endif
// === VGA port pins
// GP0 ... VGA B0 blue
// GP1 ... VGA B1
// GP2 ... VGA G0 green
// GP3 ... VGA G1
// GP4 ... VGA G2
// GP5 ... VGA R0 red
// GP6 ... VGA R1
// GP7 ... VGA R2
// GP8 ... VGA SYNC synchronization (inverted: negative SYNC=LOW=0x80, BLACK=HIGH=0x00)
#define VGA_GPIO_FIRST 0 // first VGA GPIO
#define VGA_GPIO_NUM 9 // number of VGA GPIOs, including HSYNC and VSYNC
#define VGA_GPIO_OUTNUM 8 // number of VGA color GPIOs, without HSYNC and VSYNC
#define VGA_GPIO_LAST (VGA_GPIO_FIRST+VGA_GPIO_NUM-1) // last VGA GPIO
#define VGA_GPIO_SYNC 8 // VGA SYNC GPIO
// VGA PIO and state machines
#define VGA_PIO pio0 // VGA PIO
#define VGA_SM0 0 // VGA state machine of base layer 0
#define VGA_SM1 1 // VGA state machine of overlapped layer 1
#define VGA_SM2 2 // VGA state machine of overlapped layer 2
#define VGA_SM3 3 // VGA state machine of overlapped layer 3
#define VGA_SM(layer) (VGA_SM0+(layer)) // VGA state machine of the layer
#if LAYERS==1
#define VGA_SMALL B0 // mask of all state machines
#elif LAYERS==2
#define VGA_SMALL (B0+B1) // mask of all state machines
#elif LAYERS==3
#define VGA_SMALL (B0+B1+B2) // mask of all state machines
#elif LAYERS==4
#define VGA_SMALL (B0+B1+B2+B3) // mask of all state machines
#else
#error Unsupported number of layers!
#endif
// VGA DMA
#define VGA_DMA 0 // VGA DMA base channel
#define VGA_DMA_CB0 (VGA_DMA+0) // VGA DMA channel - control block of base layer
#define VGA_DMA_PIO0 (VGA_DMA+1) // VGA DMA channel - copy data of base layer to PIO (raises IRQ0 on quiet)
#define VGA_DMA_CB1 (VGA_DMA+2) // VGA DMA channel - control block of overlapped layer 1
#define VGA_DMA_PIO1 (VGA_DMA+3) // VGA DMA channel - copy data of overlapped layer 1 to PIO
#define VGA_DMA_CB2 (VGA_DMA+4) // VGA DMA channel - control block of overlapped layer 1
#define VGA_DMA_PIO2 (VGA_DMA+5) // VGA DMA channel - copy data of overlapped layer 2 to PIO
#define VGA_DMA_CB3 (VGA_DMA+6) // VGA DMA channel - control block of overlapped layer 1
#define VGA_DMA_PIO3 (VGA_DMA+7) // VGA DMA channel - copy data of overlapped layer 3 to PIO
#define VGA_DMA_CB(layer) (VGA_DMA_CB0+(layer)*2) // VGA DMA control channel of the layer
#define VGA_DMA_PIO(layer) (VGA_DMA_PIO0+(layer)*2) // VGA DMA data channel of the layer
#define VGA_DMA_NUM (LAYERS*2) // number of used DMA channels
#define VGA_DMA_FIRST VGA_DMA // first used DMA
#define VGA_DMA_LAST (VGA_DMA_FIRST+VGA_DMA_NUM-1) // last used DMA