root / hw / ssd0303.c @ 877d8ad7
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1 | 9ee6e8bb | pbrook | /*
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2 | 9ee6e8bb | pbrook | * SSD0303 OLED controller with OSRAM Pictiva 96x16 display.
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3 | 9ee6e8bb | pbrook | *
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4 | 9ee6e8bb | pbrook | * Copyright (c) 2006-2007 CodeSourcery.
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5 | 9ee6e8bb | pbrook | * Written by Paul Brook
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6 | 9ee6e8bb | pbrook | *
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7 | 9ee6e8bb | pbrook | * This code is licenced under the GPL.
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8 | 9ee6e8bb | pbrook | */
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9 | 9ee6e8bb | pbrook | |
10 | 9ee6e8bb | pbrook | /* The controller can support a variety of different displays, but we only
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11 | 9ee6e8bb | pbrook | implement one. Most of the commends relating to brightness and geometry
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12 | 9ee6e8bb | pbrook | setup are ignored. */
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13 | 87ecb68b | pbrook | #include "hw.h" |
14 | 87ecb68b | pbrook | #include "i2c.h" |
15 | 87ecb68b | pbrook | #include "console.h" |
16 | 9ee6e8bb | pbrook | |
17 | 9ee6e8bb | pbrook | //#define DEBUG_SSD0303 1
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18 | 9ee6e8bb | pbrook | |
19 | 9ee6e8bb | pbrook | #ifdef DEBUG_SSD0303
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20 | 9ee6e8bb | pbrook | #define DPRINTF(fmt, args...) \
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21 | 9ee6e8bb | pbrook | do { printf("ssd0303: " fmt , ##args); } while (0) |
22 | 9ee6e8bb | pbrook | #define BADF(fmt, args...) \
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23 | 9ee6e8bb | pbrook | do { fprintf(stderr, "ssd0303: error: " fmt , ##args); exit(1);} while (0) |
24 | 9ee6e8bb | pbrook | #else
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25 | 9ee6e8bb | pbrook | #define DPRINTF(fmt, args...) do {} while(0) |
26 | 9ee6e8bb | pbrook | #define BADF(fmt, args...) \
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27 | 9ee6e8bb | pbrook | do { fprintf(stderr, "ssd0303: error: " fmt , ##args);} while (0) |
28 | 9ee6e8bb | pbrook | #endif
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29 | 9ee6e8bb | pbrook | |
30 | 9ee6e8bb | pbrook | /* Scaling factor for pixels. */
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31 | 9ee6e8bb | pbrook | #define MAGNIFY 4 |
32 | 9ee6e8bb | pbrook | |
33 | 9ee6e8bb | pbrook | enum ssd0303_mode
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34 | 9ee6e8bb | pbrook | { |
35 | 9ee6e8bb | pbrook | SSD0303_IDLE, |
36 | 9ee6e8bb | pbrook | SSD0303_DATA, |
37 | 9ee6e8bb | pbrook | SSD0303_CMD |
38 | 9ee6e8bb | pbrook | }; |
39 | 9ee6e8bb | pbrook | |
40 | 9ee6e8bb | pbrook | enum ssd0303_cmd {
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41 | 9ee6e8bb | pbrook | SSD0303_CMD_NONE, |
42 | 9ee6e8bb | pbrook | SSD0303_CMD_SKIP1 |
43 | 9ee6e8bb | pbrook | }; |
44 | 9ee6e8bb | pbrook | |
45 | 9ee6e8bb | pbrook | typedef struct { |
46 | 9ee6e8bb | pbrook | i2c_slave i2c; |
47 | 9ee6e8bb | pbrook | DisplayState *ds; |
48 | 9ee6e8bb | pbrook | int row;
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49 | 9ee6e8bb | pbrook | int col;
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50 | 9ee6e8bb | pbrook | int start_line;
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51 | 9ee6e8bb | pbrook | int mirror;
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52 | 9ee6e8bb | pbrook | int flash;
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53 | 9ee6e8bb | pbrook | int enabled;
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54 | 9ee6e8bb | pbrook | int inverse;
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55 | 9ee6e8bb | pbrook | int redraw;
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56 | 9ee6e8bb | pbrook | enum ssd0303_mode mode;
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57 | 9ee6e8bb | pbrook | enum ssd0303_cmd cmd_state;
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58 | 9ee6e8bb | pbrook | uint8_t framebuffer[132*8]; |
59 | 9ee6e8bb | pbrook | } ssd0303_state; |
60 | 9ee6e8bb | pbrook | |
61 | 9ee6e8bb | pbrook | static int ssd0303_recv(i2c_slave *i2c) |
62 | 9ee6e8bb | pbrook | { |
63 | 9ee6e8bb | pbrook | BADF("Reads not implemented\n");
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64 | 9ee6e8bb | pbrook | return -1; |
65 | 9ee6e8bb | pbrook | } |
66 | 9ee6e8bb | pbrook | |
67 | 9ee6e8bb | pbrook | static int ssd0303_send(i2c_slave *i2c, uint8_t data) |
68 | 9ee6e8bb | pbrook | { |
69 | 9ee6e8bb | pbrook | ssd0303_state *s = (ssd0303_state *)i2c; |
70 | 9ee6e8bb | pbrook | enum ssd0303_cmd old_cmd_state;
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71 | 9ee6e8bb | pbrook | switch (s->mode) {
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72 | 9ee6e8bb | pbrook | case SSD0303_IDLE:
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73 | 9ee6e8bb | pbrook | DPRINTF("byte 0x%02x\n", data);
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74 | 9ee6e8bb | pbrook | if (data == 0x80) |
75 | 9ee6e8bb | pbrook | s->mode = SSD0303_CMD; |
76 | 9ee6e8bb | pbrook | else if (data == 0x40) |
77 | 9ee6e8bb | pbrook | s->mode = SSD0303_DATA; |
78 | 9ee6e8bb | pbrook | else
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79 | 9ee6e8bb | pbrook | BADF("Unexpected byte 0x%x\n", data);
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80 | 9ee6e8bb | pbrook | break;
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81 | 9ee6e8bb | pbrook | case SSD0303_DATA:
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82 | 9ee6e8bb | pbrook | DPRINTF("data 0x%02x\n", data);
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83 | 9ee6e8bb | pbrook | if (s->col < 132) { |
84 | 9ee6e8bb | pbrook | s->framebuffer[s->col + s->row * 132] = data;
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85 | 9ee6e8bb | pbrook | s->col++; |
86 | 9ee6e8bb | pbrook | s->redraw = 1;
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87 | 9ee6e8bb | pbrook | } |
88 | 9ee6e8bb | pbrook | break;
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89 | 9ee6e8bb | pbrook | case SSD0303_CMD:
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90 | 9ee6e8bb | pbrook | old_cmd_state = s->cmd_state; |
91 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_NONE; |
92 | 9ee6e8bb | pbrook | switch (old_cmd_state) {
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93 | 9ee6e8bb | pbrook | case SSD0303_CMD_NONE:
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94 | 9ee6e8bb | pbrook | DPRINTF("cmd 0x%02x\n", data);
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95 | 9ee6e8bb | pbrook | s->mode = SSD0303_IDLE; |
96 | 9ee6e8bb | pbrook | switch (data) {
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97 | 9ee6e8bb | pbrook | case 0x00 ... 0x0f: /* Set lower colum address. */ |
98 | 9ee6e8bb | pbrook | s->col = (s->col & 0xf0) | (data & 0xf); |
99 | 9ee6e8bb | pbrook | break;
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100 | 9ee6e8bb | pbrook | case 0x10 ... 0x20: /* Set higher column address. */ |
101 | 9ee6e8bb | pbrook | s->col = (s->col & 0x0f) | ((data & 0xf) << 4); |
102 | 9ee6e8bb | pbrook | break;
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103 | 9ee6e8bb | pbrook | case 0x40 ... 0x7f: /* Set start line. */ |
104 | 9ee6e8bb | pbrook | s->start_line = 0;
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105 | 9ee6e8bb | pbrook | break;
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106 | 9ee6e8bb | pbrook | case 0x81: /* Set contrast (Ignored). */ |
107 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
108 | 9ee6e8bb | pbrook | break;
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109 | 9ee6e8bb | pbrook | case 0xa0: /* Mirror off. */ |
110 | 9ee6e8bb | pbrook | s->mirror = 0;
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111 | 9ee6e8bb | pbrook | break;
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112 | 9ee6e8bb | pbrook | case 0xa1: /* Mirror off. */ |
113 | 9ee6e8bb | pbrook | s->mirror = 1;
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114 | 9ee6e8bb | pbrook | break;
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115 | 9ee6e8bb | pbrook | case 0xa4: /* Entire display off. */ |
116 | 9ee6e8bb | pbrook | s->flash = 0;
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117 | 9ee6e8bb | pbrook | break;
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118 | 9ee6e8bb | pbrook | case 0xa5: /* Entire display on. */ |
119 | 9ee6e8bb | pbrook | s->flash = 1;
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120 | 9ee6e8bb | pbrook | break;
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121 | 9ee6e8bb | pbrook | case 0xa6: /* Inverse off. */ |
122 | 9ee6e8bb | pbrook | s->inverse = 0;
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123 | 9ee6e8bb | pbrook | break;
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124 | 9ee6e8bb | pbrook | case 0xa7: /* Inverse on. */ |
125 | 9ee6e8bb | pbrook | s->inverse = 1;
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126 | 9ee6e8bb | pbrook | break;
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127 | 9ee6e8bb | pbrook | case 0xa8: /* Set multipled ratio (Ignored). */ |
128 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
129 | 9ee6e8bb | pbrook | break;
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130 | 9ee6e8bb | pbrook | case 0xad: /* DC-DC power control. */ |
131 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
132 | 9ee6e8bb | pbrook | break;
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133 | 9ee6e8bb | pbrook | case 0xae: /* Display off. */ |
134 | 9ee6e8bb | pbrook | s->enabled = 0;
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135 | 9ee6e8bb | pbrook | break;
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136 | 9ee6e8bb | pbrook | case 0xaf: /* Display on. */ |
137 | 9ee6e8bb | pbrook | s->enabled = 1;
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138 | 9ee6e8bb | pbrook | break;
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139 | 9ee6e8bb | pbrook | case 0xb0 ... 0xbf: /* Set Page address. */ |
140 | 9ee6e8bb | pbrook | s->row = data & 7;
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141 | 9ee6e8bb | pbrook | break;
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142 | 9ee6e8bb | pbrook | case 0xc0 ... 0xc8: /* Set COM output direction (Ignored). */ |
143 | 9ee6e8bb | pbrook | break;
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144 | 9ee6e8bb | pbrook | case 0xd3: /* Set display offset (Ignored). */ |
145 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
146 | 9ee6e8bb | pbrook | break;
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147 | 9ee6e8bb | pbrook | case 0xd5: /* Set display clock (Ignored). */ |
148 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
149 | 9ee6e8bb | pbrook | break;
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150 | 9ee6e8bb | pbrook | case 0xd8: /* Set color and power mode (Ignored). */ |
151 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
152 | 9ee6e8bb | pbrook | break;
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153 | 9ee6e8bb | pbrook | case 0xd9: /* Set pre-charge period (Ignored). */ |
154 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
155 | 9ee6e8bb | pbrook | break;
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156 | 9ee6e8bb | pbrook | case 0xda: /* Set COM pin configuration (Ignored). */ |
157 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
158 | 9ee6e8bb | pbrook | break;
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159 | 9ee6e8bb | pbrook | case 0xdb: /* Set VCOM dselect level (Ignored). */ |
160 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
161 | 9ee6e8bb | pbrook | break;
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162 | 9ee6e8bb | pbrook | case 0xe3: /* no-op. */ |
163 | 9ee6e8bb | pbrook | break;
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164 | 9ee6e8bb | pbrook | default:
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165 | 9ee6e8bb | pbrook | BADF("Unknown command: 0x%x\n", data);
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166 | 9ee6e8bb | pbrook | } |
167 | 9ee6e8bb | pbrook | break;
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168 | 9ee6e8bb | pbrook | case SSD0303_CMD_SKIP1:
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169 | 9ee6e8bb | pbrook | DPRINTF("skip 0x%02x\n", data);
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170 | 9ee6e8bb | pbrook | break;
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171 | 9ee6e8bb | pbrook | } |
172 | 9ee6e8bb | pbrook | break;
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173 | 9ee6e8bb | pbrook | } |
174 | 9ee6e8bb | pbrook | return 0; |
175 | 9ee6e8bb | pbrook | } |
176 | 9ee6e8bb | pbrook | |
177 | 9ee6e8bb | pbrook | static void ssd0303_event(i2c_slave *i2c, enum i2c_event event) |
178 | 9ee6e8bb | pbrook | { |
179 | 9ee6e8bb | pbrook | ssd0303_state *s = (ssd0303_state *)i2c; |
180 | 9ee6e8bb | pbrook | switch (event) {
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181 | 9ee6e8bb | pbrook | case I2C_FINISH:
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182 | 9ee6e8bb | pbrook | s->mode = SSD0303_IDLE; |
183 | 9ee6e8bb | pbrook | break;
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184 | 9ee6e8bb | pbrook | case I2C_START_RECV:
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185 | 9ee6e8bb | pbrook | case I2C_START_SEND:
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186 | 9ee6e8bb | pbrook | case I2C_NACK:
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187 | 9ee6e8bb | pbrook | /* Nothing to do. */
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188 | 9ee6e8bb | pbrook | break;
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189 | 9ee6e8bb | pbrook | } |
190 | 9ee6e8bb | pbrook | } |
191 | 9ee6e8bb | pbrook | |
192 | 9ee6e8bb | pbrook | static void ssd0303_update_display(void *opaque) |
193 | 9ee6e8bb | pbrook | { |
194 | 9ee6e8bb | pbrook | ssd0303_state *s = (ssd0303_state *)opaque; |
195 | 9ee6e8bb | pbrook | uint8_t *dest; |
196 | 9ee6e8bb | pbrook | uint8_t *src; |
197 | 9ee6e8bb | pbrook | int x;
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198 | 9ee6e8bb | pbrook | int y;
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199 | 9ee6e8bb | pbrook | int line;
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200 | 9ee6e8bb | pbrook | char *colors[2]; |
201 | 9ee6e8bb | pbrook | char colortab[MAGNIFY * 8]; |
202 | 9ee6e8bb | pbrook | int dest_width;
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203 | 9ee6e8bb | pbrook | uint8_t mask; |
204 | 9ee6e8bb | pbrook | |
205 | 9ee6e8bb | pbrook | if (s->redraw) {
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206 | 9ee6e8bb | pbrook | switch (s->ds->depth) {
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207 | 9ee6e8bb | pbrook | case 0: |
208 | 9ee6e8bb | pbrook | return;
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209 | 9ee6e8bb | pbrook | case 15: |
210 | 9ee6e8bb | pbrook | dest_width = 2;
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211 | 9ee6e8bb | pbrook | break;
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212 | 9ee6e8bb | pbrook | case 16: |
213 | 9ee6e8bb | pbrook | dest_width = 2;
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214 | 9ee6e8bb | pbrook | break;
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215 | 9ee6e8bb | pbrook | case 24: |
216 | 9ee6e8bb | pbrook | dest_width = 3;
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217 | 9ee6e8bb | pbrook | break;
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218 | 9ee6e8bb | pbrook | case 32: |
219 | 9ee6e8bb | pbrook | dest_width = 4;
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220 | 9ee6e8bb | pbrook | break;
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221 | 9ee6e8bb | pbrook | default:
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222 | 9ee6e8bb | pbrook | BADF("Bad color depth\n");
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223 | 9ee6e8bb | pbrook | return;
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224 | 9ee6e8bb | pbrook | } |
225 | 9ee6e8bb | pbrook | dest_width *= MAGNIFY; |
226 | 9ee6e8bb | pbrook | memset(colortab, 0xff, dest_width);
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227 | 9ee6e8bb | pbrook | memset(colortab + dest_width, 0, dest_width);
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228 | 9ee6e8bb | pbrook | if (s->flash) {
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229 | 9ee6e8bb | pbrook | colors[0] = colortab;
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230 | 9ee6e8bb | pbrook | colors[1] = colortab;
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231 | 9ee6e8bb | pbrook | } else if (s->inverse) { |
232 | 9ee6e8bb | pbrook | colors[0] = colortab;
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233 | 9ee6e8bb | pbrook | colors[1] = colortab + dest_width;
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234 | 9ee6e8bb | pbrook | } else {
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235 | 9ee6e8bb | pbrook | colors[0] = colortab + dest_width;
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236 | 9ee6e8bb | pbrook | colors[1] = colortab;
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237 | 9ee6e8bb | pbrook | } |
238 | 9ee6e8bb | pbrook | dest = s->ds->data; |
239 | 9ee6e8bb | pbrook | for (y = 0; y < 16; y++) { |
240 | 9ee6e8bb | pbrook | line = (y + s->start_line) & 63;
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241 | 9ee6e8bb | pbrook | src = s->framebuffer + 132 * (line >> 3) + 36; |
242 | 9ee6e8bb | pbrook | mask = 1 << (line & 7); |
243 | 9ee6e8bb | pbrook | for (x = 0; x < 96; x++) { |
244 | 9ee6e8bb | pbrook | memcpy(dest, colors[(*src & mask) != 0], dest_width);
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245 | 9ee6e8bb | pbrook | dest += dest_width; |
246 | 9ee6e8bb | pbrook | src++; |
247 | 9ee6e8bb | pbrook | } |
248 | 9ee6e8bb | pbrook | for (x = 1; x < MAGNIFY; x++) { |
249 | 9ee6e8bb | pbrook | memcpy(dest, dest - dest_width * 96, dest_width * 96); |
250 | 9ee6e8bb | pbrook | dest += dest_width * 96;
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251 | 9ee6e8bb | pbrook | } |
252 | 9ee6e8bb | pbrook | } |
253 | 9ee6e8bb | pbrook | } |
254 | 9ee6e8bb | pbrook | dpy_update(s->ds, 0, 0, 96 * MAGNIFY, 16 * MAGNIFY); |
255 | 9ee6e8bb | pbrook | } |
256 | 9ee6e8bb | pbrook | |
257 | 9ee6e8bb | pbrook | static void ssd0303_invalidate_display(void * opaque) |
258 | 9ee6e8bb | pbrook | { |
259 | 9ee6e8bb | pbrook | ssd0303_state *s = (ssd0303_state *)opaque; |
260 | 9ee6e8bb | pbrook | s->redraw = 1;
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261 | 9ee6e8bb | pbrook | } |
262 | 9ee6e8bb | pbrook | |
263 | 9ee6e8bb | pbrook | void ssd0303_init(DisplayState *ds, i2c_bus *bus, int address) |
264 | 9ee6e8bb | pbrook | { |
265 | 9ee6e8bb | pbrook | ssd0303_state *s; |
266 | 9ee6e8bb | pbrook | |
267 | 9ee6e8bb | pbrook | s = (ssd0303_state *)i2c_slave_init(bus, address, sizeof(ssd0303_state));
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268 | 9ee6e8bb | pbrook | s->ds = ds; |
269 | 9ee6e8bb | pbrook | s->i2c.event = ssd0303_event; |
270 | 9ee6e8bb | pbrook | s->i2c.recv = ssd0303_recv; |
271 | 9ee6e8bb | pbrook | s->i2c.send = ssd0303_send; |
272 | 9ee6e8bb | pbrook | graphic_console_init(ds, ssd0303_update_display, ssd0303_invalidate_display, |
273 | 4d3b6f6e | balrog | NULL, NULL, s); |
274 | 9ee6e8bb | pbrook | dpy_resize(s->ds, 96 * MAGNIFY, 16 * MAGNIFY); |
275 | 9ee6e8bb | pbrook | } |