2 * SSD0303 OLED controller with OSRAM Pictiva 96x16 display.
4 * Copyright (c) 2006-2007 CodeSourcery.
5 * Written by Paul Brook
7 * This code is licenced under the GPL.
10 /* The controller can support a variety of different displays, but we only
11 implement one. Most of the commends relating to brightness and geometry
17 //#define DEBUG_SSD0303 1
20 #define DPRINTF(fmt, args...) \
21 do { printf("ssd0303: " fmt , ##args); } while (0)
22 #define BADF(fmt, args...) \
23 do { fprintf(stderr, "ssd0303: error: " fmt , ##args); exit(1);} while (0)
25 #define DPRINTF(fmt, args...) do {} while(0)
26 #define BADF(fmt, args...) \
27 do { fprintf(stderr, "ssd0303: error: " fmt , ##args);} while (0)
30 /* Scaling factor for pixels. */
57 enum ssd0303_mode mode;
58 enum ssd0303_cmd cmd_state;
59 uint8_t framebuffer[132*8];
62 static int ssd0303_recv(i2c_slave *i2c)
64 BADF("Reads not implemented\n");
68 static int ssd0303_send(i2c_slave *i2c, uint8_t data)
70 ssd0303_state *s = (ssd0303_state *)i2c;
71 enum ssd0303_cmd old_cmd_state;
74 DPRINTF("byte 0x%02x\n", data);
76 s->mode = SSD0303_CMD;
77 else if (data == 0x40)
78 s->mode = SSD0303_DATA;
80 BADF("Unexpected byte 0x%x\n", data);
83 DPRINTF("data 0x%02x\n", data);
85 s->framebuffer[s->col + s->row * 132] = data;
91 old_cmd_state = s->cmd_state;
92 s->cmd_state = SSD0303_CMD_NONE;
93 switch (old_cmd_state) {
94 case SSD0303_CMD_NONE:
95 DPRINTF("cmd 0x%02x\n", data);
96 s->mode = SSD0303_IDLE;
98 case 0x00 ... 0x0f: /* Set lower colum address. */
99 s->col = (s->col & 0xf0) | (data & 0xf);
101 case 0x10 ... 0x20: /* Set higher column address. */
102 s->col = (s->col & 0x0f) | ((data & 0xf) << 4);
104 case 0x40 ... 0x7f: /* Set start line. */
107 case 0x81: /* Set contrast (Ignored). */
108 s->cmd_state = SSD0303_CMD_SKIP1;
110 case 0xa0: /* Mirror off. */
113 case 0xa1: /* Mirror off. */
116 case 0xa4: /* Entire display off. */
119 case 0xa5: /* Entire display on. */
122 case 0xa6: /* Inverse off. */
125 case 0xa7: /* Inverse on. */
128 case 0xa8: /* Set multipled ratio (Ignored). */
129 s->cmd_state = SSD0303_CMD_SKIP1;
131 case 0xad: /* DC-DC power control. */
132 s->cmd_state = SSD0303_CMD_SKIP1;
134 case 0xae: /* Display off. */
137 case 0xaf: /* Display on. */
140 case 0xb0 ... 0xbf: /* Set Page address. */
143 case 0xc0 ... 0xc8: /* Set COM output direction (Ignored). */
145 case 0xd3: /* Set display offset (Ignored). */
146 s->cmd_state = SSD0303_CMD_SKIP1;
148 case 0xd5: /* Set display clock (Ignored). */
149 s->cmd_state = SSD0303_CMD_SKIP1;
151 case 0xd8: /* Set color and power mode (Ignored). */
152 s->cmd_state = SSD0303_CMD_SKIP1;
154 case 0xd9: /* Set pre-charge period (Ignored). */
155 s->cmd_state = SSD0303_CMD_SKIP1;
157 case 0xda: /* Set COM pin configuration (Ignored). */
158 s->cmd_state = SSD0303_CMD_SKIP1;
160 case 0xdb: /* Set VCOM dselect level (Ignored). */
161 s->cmd_state = SSD0303_CMD_SKIP1;
163 case 0xe3: /* no-op. */
166 BADF("Unknown command: 0x%x\n", data);
169 case SSD0303_CMD_SKIP1:
170 DPRINTF("skip 0x%02x\n", data);
178 static void ssd0303_event(i2c_slave *i2c, enum i2c_event event)
180 ssd0303_state *s = (ssd0303_state *)i2c;
183 s->mode = SSD0303_IDLE;
193 static void ssd0303_update_display(void *opaque)
195 ssd0303_state *s = (ssd0303_state *)opaque;
202 char colortab[MAGNIFY * 8];
209 switch (s->ds->depth) {
225 BADF("Bad color depth\n");
228 dest_width *= MAGNIFY;
229 memset(colortab, 0xff, dest_width);
230 memset(colortab + dest_width, 0, dest_width);
232 colors[0] = colortab;
233 colors[1] = colortab;
234 } else if (s->inverse) {
235 colors[0] = colortab;
236 colors[1] = colortab + dest_width;
238 colors[0] = colortab + dest_width;
239 colors[1] = colortab;
242 for (y = 0; y < 16; y++) {
243 line = (y + s->start_line) & 63;
244 src = s->framebuffer + 132 * (line >> 3) + 36;
245 mask = 1 << (line & 7);
246 for (x = 0; x < 96; x++) {
247 memcpy(dest, colors[(*src & mask) != 0], dest_width);
251 for (x = 1; x < MAGNIFY; x++) {
252 memcpy(dest, dest - dest_width * 96, dest_width * 96);
253 dest += dest_width * 96;
257 dpy_update(s->ds, 0, 0, 96 * MAGNIFY, 16 * MAGNIFY);
260 static void ssd0303_invalidate_display(void * opaque)
262 ssd0303_state *s = (ssd0303_state *)opaque;
266 static void ssd0303_save(QEMUFile *f, void *opaque)
268 ssd0303_state *s = (ssd0303_state *)opaque;
270 qemu_put_be32(f, s->row);
271 qemu_put_be32(f, s->col);
272 qemu_put_be32(f, s->start_line);
273 qemu_put_be32(f, s->mirror);
274 qemu_put_be32(f, s->flash);
275 qemu_put_be32(f, s->enabled);
276 qemu_put_be32(f, s->inverse);
277 qemu_put_be32(f, s->redraw);
278 qemu_put_be32(f, s->mode);
279 qemu_put_be32(f, s->cmd_state);
280 qemu_put_buffer(f, s->framebuffer, sizeof(s->framebuffer));
282 i2c_slave_save(f, &s->i2c);
285 static int ssd0303_load(QEMUFile *f, void *opaque, int version_id)
287 ssd0303_state *s = (ssd0303_state *)opaque;
292 s->row = qemu_get_be32(f);
293 s->col = qemu_get_be32(f);
294 s->start_line = qemu_get_be32(f);
295 s->mirror = qemu_get_be32(f);
296 s->flash = qemu_get_be32(f);
297 s->enabled = qemu_get_be32(f);
298 s->inverse = qemu_get_be32(f);
299 s->redraw = qemu_get_be32(f);
300 s->mode = qemu_get_be32(f);
301 s->cmd_state = qemu_get_be32(f);
302 qemu_get_buffer(f, s->framebuffer, sizeof(s->framebuffer));
304 i2c_slave_load(f, &s->i2c);
309 void ssd0303_init(DisplayState *ds, i2c_bus *bus, int address)
313 s = (ssd0303_state *)i2c_slave_init(bus, address, sizeof(ssd0303_state));
315 s->i2c.event = ssd0303_event;
316 s->i2c.recv = ssd0303_recv;
317 s->i2c.send = ssd0303_send;
318 s->console = graphic_console_init(ds, ssd0303_update_display,
319 ssd0303_invalidate_display,
321 qemu_console_resize(s->console, 96 * MAGNIFY, 16 * MAGNIFY);
322 register_savevm("ssd0303_oled", -1, 1, ssd0303_save, ssd0303_load, s);