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
15 //#define DEBUG_SSD0303 1
18 #define DPRINTF(fmt, args...) \
19 do { printf("ssd0303: " fmt , ##args); } while (0)
20 #define BADF(fmt, args...) \
21 do { fprintf(stderr, "ssd0303: error: " fmt , ##args); exit(1);} while (0)
23 #define DPRINTF(fmt, args...) do {} while(0)
24 #define BADF(fmt, args...) \
25 do { fprintf(stderr, "ssd0303: error: " fmt , ##args);} while (0)
28 /* Scaling factor for pixels. */
54 enum ssd0303_mode mode
;
55 enum ssd0303_cmd cmd_state
;
56 uint8_t framebuffer
[132*8];
59 static int ssd0303_recv(i2c_slave
*i2c
)
61 BADF("Reads not implemented\n");
65 static int ssd0303_send(i2c_slave
*i2c
, uint8_t data
)
67 ssd0303_state
*s
= (ssd0303_state
*)i2c
;
68 enum ssd0303_cmd old_cmd_state
;
71 DPRINTF("byte 0x%02x\n", data
);
73 s
->mode
= SSD0303_CMD
;
74 else if (data
== 0x40)
75 s
->mode
= SSD0303_DATA
;
77 BADF("Unexpected byte 0x%x\n", data
);
80 DPRINTF("data 0x%02x\n", data
);
82 s
->framebuffer
[s
->col
+ s
->row
* 132] = data
;
88 old_cmd_state
= s
->cmd_state
;
89 s
->cmd_state
= SSD0303_CMD_NONE
;
90 switch (old_cmd_state
) {
91 case SSD0303_CMD_NONE
:
92 DPRINTF("cmd 0x%02x\n", data
);
93 s
->mode
= SSD0303_IDLE
;
95 case 0x00 ... 0x0f: /* Set lower colum address. */
96 s
->col
= (s
->col
& 0xf0) | (data
& 0xf);
98 case 0x10 ... 0x20: /* Set higher column address. */
99 s
->col
= (s
->col
& 0x0f) | ((data
& 0xf) << 4);
101 case 0x40 ... 0x7f: /* Set start line. */
104 case 0x81: /* Set contrast (Ignored). */
105 s
->cmd_state
= SSD0303_CMD_SKIP1
;
107 case 0xa0: /* Mirror off. */
110 case 0xa1: /* Mirror off. */
113 case 0xa4: /* Entire display off. */
116 case 0xa5: /* Entire display on. */
119 case 0xa6: /* Inverse off. */
122 case 0xa7: /* Inverse on. */
125 case 0xa8: /* Set multipled ratio (Ignored). */
126 s
->cmd_state
= SSD0303_CMD_SKIP1
;
128 case 0xad: /* DC-DC power control. */
129 s
->cmd_state
= SSD0303_CMD_SKIP1
;
131 case 0xae: /* Display off. */
134 case 0xaf: /* Display on. */
137 case 0xb0 ... 0xbf: /* Set Page address. */
140 case 0xc0 ... 0xc8: /* Set COM output direction (Ignored). */
142 case 0xd3: /* Set display offset (Ignored). */
143 s
->cmd_state
= SSD0303_CMD_SKIP1
;
145 case 0xd5: /* Set display clock (Ignored). */
146 s
->cmd_state
= SSD0303_CMD_SKIP1
;
148 case 0xd8: /* Set color and power mode (Ignored). */
149 s
->cmd_state
= SSD0303_CMD_SKIP1
;
151 case 0xd9: /* Set pre-charge period (Ignored). */
152 s
->cmd_state
= SSD0303_CMD_SKIP1
;
154 case 0xda: /* Set COM pin configuration (Ignored). */
155 s
->cmd_state
= SSD0303_CMD_SKIP1
;
157 case 0xdb: /* Set VCOM dselect level (Ignored). */
158 s
->cmd_state
= SSD0303_CMD_SKIP1
;
160 case 0xe3: /* no-op. */
163 BADF("Unknown command: 0x%x\n", data
);
166 case SSD0303_CMD_SKIP1
:
167 DPRINTF("skip 0x%02x\n", data
);
175 static void ssd0303_event(i2c_slave
*i2c
, enum i2c_event event
)
177 ssd0303_state
*s
= (ssd0303_state
*)i2c
;
180 s
->mode
= SSD0303_IDLE
;
190 static void ssd0303_update_display(void *opaque
)
192 ssd0303_state
*s
= (ssd0303_state
*)opaque
;
199 char colortab
[MAGNIFY
* 8];
204 switch (s
->ds
->depth
) {
220 BADF("Bad color depth\n");
223 dest_width
*= MAGNIFY
;
224 memset(colortab
, 0xff, dest_width
);
225 memset(colortab
+ dest_width
, 0, dest_width
);
227 colors
[0] = colortab
;
228 colors
[1] = colortab
;
229 } else if (s
->inverse
) {
230 colors
[0] = colortab
;
231 colors
[1] = colortab
+ dest_width
;
233 colors
[0] = colortab
+ dest_width
;
234 colors
[1] = colortab
;
237 for (y
= 0; y
< 16; y
++) {
238 line
= (y
+ s
->start_line
) & 63;
239 src
= s
->framebuffer
+ 132 * (line
>> 3) + 36;
240 mask
= 1 << (line
& 7);
241 for (x
= 0; x
< 96; x
++) {
242 memcpy(dest
, colors
[(*src
& mask
) != 0], dest_width
);
246 for (x
= 1; x
< MAGNIFY
; x
++) {
247 memcpy(dest
, dest
- dest_width
* 96, dest_width
* 96);
248 dest
+= dest_width
* 96;
252 dpy_update(s
->ds
, 0, 0, 96 * MAGNIFY
, 16 * MAGNIFY
);
255 static void ssd0303_invalidate_display(void * opaque
)
257 ssd0303_state
*s
= (ssd0303_state
*)opaque
;
261 void ssd0303_init(DisplayState
*ds
, i2c_bus
*bus
, int address
)
265 s
= (ssd0303_state
*)i2c_slave_init(bus
, address
, sizeof(ssd0303_state
));
267 s
->i2c
.event
= ssd0303_event
;
268 s
->i2c
.recv
= ssd0303_recv
;
269 s
->i2c
.send
= ssd0303_send
;
270 graphic_console_init(ds
, ssd0303_update_display
, ssd0303_invalidate_display
,
272 dpy_resize(s
->ds
, 96 * MAGNIFY
, 16 * MAGNIFY
);