root / hw / ssd0303.c @ 5e65a310
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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 | c60e08d9 | pbrook | QEMUConsole *console; |
49 | 9ee6e8bb | pbrook | int row;
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50 | 9ee6e8bb | pbrook | int col;
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51 | 9ee6e8bb | pbrook | int start_line;
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52 | 9ee6e8bb | pbrook | int mirror;
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53 | 9ee6e8bb | pbrook | int flash;
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54 | 9ee6e8bb | pbrook | int enabled;
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55 | 9ee6e8bb | pbrook | int inverse;
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56 | 9ee6e8bb | pbrook | int redraw;
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57 | 9ee6e8bb | pbrook | enum ssd0303_mode mode;
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58 | 9ee6e8bb | pbrook | enum ssd0303_cmd cmd_state;
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59 | 9ee6e8bb | pbrook | uint8_t framebuffer[132*8]; |
60 | 9ee6e8bb | pbrook | } ssd0303_state; |
61 | 9ee6e8bb | pbrook | |
62 | 9ee6e8bb | pbrook | static int ssd0303_recv(i2c_slave *i2c) |
63 | 9ee6e8bb | pbrook | { |
64 | 9ee6e8bb | pbrook | BADF("Reads not implemented\n");
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65 | 9ee6e8bb | pbrook | return -1; |
66 | 9ee6e8bb | pbrook | } |
67 | 9ee6e8bb | pbrook | |
68 | 9ee6e8bb | pbrook | static int ssd0303_send(i2c_slave *i2c, uint8_t data) |
69 | 9ee6e8bb | pbrook | { |
70 | 9ee6e8bb | pbrook | ssd0303_state *s = (ssd0303_state *)i2c; |
71 | 9ee6e8bb | pbrook | enum ssd0303_cmd old_cmd_state;
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72 | 9ee6e8bb | pbrook | switch (s->mode) {
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73 | 9ee6e8bb | pbrook | case SSD0303_IDLE:
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74 | 9ee6e8bb | pbrook | DPRINTF("byte 0x%02x\n", data);
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75 | 9ee6e8bb | pbrook | if (data == 0x80) |
76 | 9ee6e8bb | pbrook | s->mode = SSD0303_CMD; |
77 | 9ee6e8bb | pbrook | else if (data == 0x40) |
78 | 9ee6e8bb | pbrook | s->mode = SSD0303_DATA; |
79 | 9ee6e8bb | pbrook | else
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80 | 9ee6e8bb | pbrook | BADF("Unexpected byte 0x%x\n", data);
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81 | 9ee6e8bb | pbrook | break;
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82 | 9ee6e8bb | pbrook | case SSD0303_DATA:
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83 | 9ee6e8bb | pbrook | DPRINTF("data 0x%02x\n", data);
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84 | 9ee6e8bb | pbrook | if (s->col < 132) { |
85 | 9ee6e8bb | pbrook | s->framebuffer[s->col + s->row * 132] = data;
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86 | 9ee6e8bb | pbrook | s->col++; |
87 | 9ee6e8bb | pbrook | s->redraw = 1;
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88 | 9ee6e8bb | pbrook | } |
89 | 9ee6e8bb | pbrook | break;
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90 | 9ee6e8bb | pbrook | case SSD0303_CMD:
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91 | 9ee6e8bb | pbrook | old_cmd_state = s->cmd_state; |
92 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_NONE; |
93 | 9ee6e8bb | pbrook | switch (old_cmd_state) {
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94 | 9ee6e8bb | pbrook | case SSD0303_CMD_NONE:
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95 | 9ee6e8bb | pbrook | DPRINTF("cmd 0x%02x\n", data);
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96 | 9ee6e8bb | pbrook | s->mode = SSD0303_IDLE; |
97 | 9ee6e8bb | pbrook | switch (data) {
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98 | 9ee6e8bb | pbrook | case 0x00 ... 0x0f: /* Set lower colum address. */ |
99 | 9ee6e8bb | pbrook | s->col = (s->col & 0xf0) | (data & 0xf); |
100 | 9ee6e8bb | pbrook | break;
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101 | 9ee6e8bb | pbrook | case 0x10 ... 0x20: /* Set higher column address. */ |
102 | 9ee6e8bb | pbrook | s->col = (s->col & 0x0f) | ((data & 0xf) << 4); |
103 | 9ee6e8bb | pbrook | break;
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104 | 9ee6e8bb | pbrook | case 0x40 ... 0x7f: /* Set start line. */ |
105 | 9ee6e8bb | pbrook | s->start_line = 0;
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106 | 9ee6e8bb | pbrook | break;
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107 | 9ee6e8bb | pbrook | case 0x81: /* Set contrast (Ignored). */ |
108 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
109 | 9ee6e8bb | pbrook | break;
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110 | 9ee6e8bb | pbrook | case 0xa0: /* Mirror off. */ |
111 | 9ee6e8bb | pbrook | s->mirror = 0;
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112 | 9ee6e8bb | pbrook | break;
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113 | 9ee6e8bb | pbrook | case 0xa1: /* Mirror off. */ |
114 | 9ee6e8bb | pbrook | s->mirror = 1;
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115 | 9ee6e8bb | pbrook | break;
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116 | 9ee6e8bb | pbrook | case 0xa4: /* Entire display off. */ |
117 | 9ee6e8bb | pbrook | s->flash = 0;
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118 | 9ee6e8bb | pbrook | break;
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119 | 9ee6e8bb | pbrook | case 0xa5: /* Entire display on. */ |
120 | 9ee6e8bb | pbrook | s->flash = 1;
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121 | 9ee6e8bb | pbrook | break;
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122 | 9ee6e8bb | pbrook | case 0xa6: /* Inverse off. */ |
123 | 9ee6e8bb | pbrook | s->inverse = 0;
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124 | 9ee6e8bb | pbrook | break;
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125 | 9ee6e8bb | pbrook | case 0xa7: /* Inverse on. */ |
126 | 9ee6e8bb | pbrook | s->inverse = 1;
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127 | 9ee6e8bb | pbrook | break;
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128 | 9ee6e8bb | pbrook | case 0xa8: /* Set multipled ratio (Ignored). */ |
129 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
130 | 9ee6e8bb | pbrook | break;
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131 | 9ee6e8bb | pbrook | case 0xad: /* DC-DC power control. */ |
132 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
133 | 9ee6e8bb | pbrook | break;
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134 | 9ee6e8bb | pbrook | case 0xae: /* Display off. */ |
135 | 9ee6e8bb | pbrook | s->enabled = 0;
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136 | 9ee6e8bb | pbrook | break;
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137 | 9ee6e8bb | pbrook | case 0xaf: /* Display on. */ |
138 | 9ee6e8bb | pbrook | s->enabled = 1;
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139 | 9ee6e8bb | pbrook | break;
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140 | 9ee6e8bb | pbrook | case 0xb0 ... 0xbf: /* Set Page address. */ |
141 | 9ee6e8bb | pbrook | s->row = data & 7;
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142 | 9ee6e8bb | pbrook | break;
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143 | 9ee6e8bb | pbrook | case 0xc0 ... 0xc8: /* Set COM output direction (Ignored). */ |
144 | 9ee6e8bb | pbrook | break;
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145 | 9ee6e8bb | pbrook | case 0xd3: /* Set display offset (Ignored). */ |
146 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
147 | 9ee6e8bb | pbrook | break;
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148 | 9ee6e8bb | pbrook | case 0xd5: /* Set display clock (Ignored). */ |
149 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
150 | 9ee6e8bb | pbrook | break;
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151 | 9ee6e8bb | pbrook | case 0xd8: /* Set color and power mode (Ignored). */ |
152 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
153 | 9ee6e8bb | pbrook | break;
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154 | 9ee6e8bb | pbrook | case 0xd9: /* Set pre-charge period (Ignored). */ |
155 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
156 | 9ee6e8bb | pbrook | break;
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157 | 9ee6e8bb | pbrook | case 0xda: /* Set COM pin configuration (Ignored). */ |
158 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
159 | 9ee6e8bb | pbrook | break;
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160 | 9ee6e8bb | pbrook | case 0xdb: /* Set VCOM dselect level (Ignored). */ |
161 | 9ee6e8bb | pbrook | s->cmd_state = SSD0303_CMD_SKIP1; |
162 | 9ee6e8bb | pbrook | break;
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163 | 9ee6e8bb | pbrook | case 0xe3: /* no-op. */ |
164 | 9ee6e8bb | pbrook | break;
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165 | 9ee6e8bb | pbrook | default:
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166 | 9ee6e8bb | pbrook | BADF("Unknown command: 0x%x\n", data);
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167 | 9ee6e8bb | pbrook | } |
168 | 9ee6e8bb | pbrook | break;
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169 | 9ee6e8bb | pbrook | case SSD0303_CMD_SKIP1:
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170 | 9ee6e8bb | pbrook | DPRINTF("skip 0x%02x\n", data);
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171 | 9ee6e8bb | pbrook | break;
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172 | 9ee6e8bb | pbrook | } |
173 | 9ee6e8bb | pbrook | break;
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174 | 9ee6e8bb | pbrook | } |
175 | 9ee6e8bb | pbrook | return 0; |
176 | 9ee6e8bb | pbrook | } |
177 | 9ee6e8bb | pbrook | |
178 | 9ee6e8bb | pbrook | static void ssd0303_event(i2c_slave *i2c, enum i2c_event event) |
179 | 9ee6e8bb | pbrook | { |
180 | 9ee6e8bb | pbrook | ssd0303_state *s = (ssd0303_state *)i2c; |
181 | 9ee6e8bb | pbrook | switch (event) {
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182 | 9ee6e8bb | pbrook | case I2C_FINISH:
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183 | 9ee6e8bb | pbrook | s->mode = SSD0303_IDLE; |
184 | 9ee6e8bb | pbrook | break;
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185 | 9ee6e8bb | pbrook | case I2C_START_RECV:
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186 | 9ee6e8bb | pbrook | case I2C_START_SEND:
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187 | 9ee6e8bb | pbrook | case I2C_NACK:
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188 | 9ee6e8bb | pbrook | /* Nothing to do. */
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189 | 9ee6e8bb | pbrook | break;
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190 | 9ee6e8bb | pbrook | } |
191 | 9ee6e8bb | pbrook | } |
192 | 9ee6e8bb | pbrook | |
193 | 9ee6e8bb | pbrook | static void ssd0303_update_display(void *opaque) |
194 | 9ee6e8bb | pbrook | { |
195 | 9ee6e8bb | pbrook | ssd0303_state *s = (ssd0303_state *)opaque; |
196 | 9ee6e8bb | pbrook | uint8_t *dest; |
197 | 9ee6e8bb | pbrook | uint8_t *src; |
198 | 9ee6e8bb | pbrook | int x;
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199 | 9ee6e8bb | pbrook | int y;
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200 | 9ee6e8bb | pbrook | int line;
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201 | 9ee6e8bb | pbrook | char *colors[2]; |
202 | 9ee6e8bb | pbrook | char colortab[MAGNIFY * 8]; |
203 | 9ee6e8bb | pbrook | int dest_width;
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204 | 9ee6e8bb | pbrook | uint8_t mask; |
205 | 9ee6e8bb | pbrook | |
206 | 9ee6e8bb | pbrook | if (s->redraw) {
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207 | 9ee6e8bb | pbrook | switch (s->ds->depth) {
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208 | 9ee6e8bb | pbrook | case 0: |
209 | 9ee6e8bb | pbrook | return;
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210 | 9ee6e8bb | pbrook | case 15: |
211 | 9ee6e8bb | pbrook | dest_width = 2;
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212 | 9ee6e8bb | pbrook | break;
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213 | 9ee6e8bb | pbrook | case 16: |
214 | 9ee6e8bb | pbrook | dest_width = 2;
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215 | 9ee6e8bb | pbrook | break;
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216 | 9ee6e8bb | pbrook | case 24: |
217 | 9ee6e8bb | pbrook | dest_width = 3;
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218 | 9ee6e8bb | pbrook | break;
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219 | 9ee6e8bb | pbrook | case 32: |
220 | 9ee6e8bb | pbrook | dest_width = 4;
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221 | 9ee6e8bb | pbrook | break;
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222 | 9ee6e8bb | pbrook | default:
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223 | 9ee6e8bb | pbrook | BADF("Bad color depth\n");
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224 | 9ee6e8bb | pbrook | return;
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225 | 9ee6e8bb | pbrook | } |
226 | 9ee6e8bb | pbrook | dest_width *= MAGNIFY; |
227 | 9ee6e8bb | pbrook | memset(colortab, 0xff, dest_width);
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228 | 9ee6e8bb | pbrook | memset(colortab + dest_width, 0, dest_width);
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229 | 9ee6e8bb | pbrook | if (s->flash) {
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230 | 9ee6e8bb | pbrook | colors[0] = colortab;
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231 | 9ee6e8bb | pbrook | colors[1] = colortab;
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232 | 9ee6e8bb | pbrook | } else if (s->inverse) { |
233 | 9ee6e8bb | pbrook | colors[0] = colortab;
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234 | 9ee6e8bb | pbrook | colors[1] = colortab + dest_width;
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235 | 9ee6e8bb | pbrook | } else {
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236 | 9ee6e8bb | pbrook | colors[0] = colortab + dest_width;
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237 | 9ee6e8bb | pbrook | colors[1] = colortab;
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238 | 9ee6e8bb | pbrook | } |
239 | 9ee6e8bb | pbrook | dest = s->ds->data; |
240 | 9ee6e8bb | pbrook | for (y = 0; y < 16; y++) { |
241 | 9ee6e8bb | pbrook | line = (y + s->start_line) & 63;
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242 | 9ee6e8bb | pbrook | src = s->framebuffer + 132 * (line >> 3) + 36; |
243 | 9ee6e8bb | pbrook | mask = 1 << (line & 7); |
244 | 9ee6e8bb | pbrook | for (x = 0; x < 96; x++) { |
245 | 9ee6e8bb | pbrook | memcpy(dest, colors[(*src & mask) != 0], dest_width);
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246 | 9ee6e8bb | pbrook | dest += dest_width; |
247 | 9ee6e8bb | pbrook | src++; |
248 | 9ee6e8bb | pbrook | } |
249 | 9ee6e8bb | pbrook | for (x = 1; x < MAGNIFY; x++) { |
250 | 9ee6e8bb | pbrook | memcpy(dest, dest - dest_width * 96, dest_width * 96); |
251 | 9ee6e8bb | pbrook | dest += dest_width * 96;
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252 | 9ee6e8bb | pbrook | } |
253 | 9ee6e8bb | pbrook | } |
254 | 9ee6e8bb | pbrook | } |
255 | 9ee6e8bb | pbrook | dpy_update(s->ds, 0, 0, 96 * MAGNIFY, 16 * MAGNIFY); |
256 | 9ee6e8bb | pbrook | } |
257 | 9ee6e8bb | pbrook | |
258 | 9ee6e8bb | pbrook | static void ssd0303_invalidate_display(void * opaque) |
259 | 9ee6e8bb | pbrook | { |
260 | 9ee6e8bb | pbrook | ssd0303_state *s = (ssd0303_state *)opaque; |
261 | 9ee6e8bb | pbrook | s->redraw = 1;
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262 | 9ee6e8bb | pbrook | } |
263 | 9ee6e8bb | pbrook | |
264 | 9ee6e8bb | pbrook | void ssd0303_init(DisplayState *ds, i2c_bus *bus, int address) |
265 | 9ee6e8bb | pbrook | { |
266 | 9ee6e8bb | pbrook | ssd0303_state *s; |
267 | 9ee6e8bb | pbrook | |
268 | 9ee6e8bb | pbrook | s = (ssd0303_state *)i2c_slave_init(bus, address, sizeof(ssd0303_state));
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269 | 9ee6e8bb | pbrook | s->ds = ds; |
270 | 9ee6e8bb | pbrook | s->i2c.event = ssd0303_event; |
271 | 9ee6e8bb | pbrook | s->i2c.recv = ssd0303_recv; |
272 | 9ee6e8bb | pbrook | s->i2c.send = ssd0303_send; |
273 | c60e08d9 | pbrook | s->console = graphic_console_init(ds, ssd0303_update_display, |
274 | c60e08d9 | pbrook | ssd0303_invalidate_display, |
275 | c60e08d9 | pbrook | NULL, NULL, s); |
276 | c60e08d9 | pbrook | qemu_console_resize(s->console, 96 * MAGNIFY, 16 * MAGNIFY); |
277 | 9ee6e8bb | pbrook | } |