8 #ifdef ADAFRUIT_BLE_ENABLE
9 #include "adafruit_ble.h"
17 // Set this to 1 to help diagnose early startup problems
18 // when testing power-on with ble. Turn it off otherwise,
19 // as the latency of printing most of the debug info messes
20 // with the matrix scan, causing keys to drop.
21 #define DEBUG_TO_SCREEN 0
23 //static uint16_t last_battery_update;
24 //static uint32_t vbat;
25 //#define BatteryUpdateInterval 10000 /* milliseconds */
26 #define ScreenOffInterval 300000 /* milliseconds */
28 static uint8_t displaying;
30 static uint16_t last_flush;
32 // Write command sequence.
33 // Returns true on success.
34 static inline bool _send_cmd1(uint8_t cmd) {
37 if (i2c_start_write(SSD1306_ADDRESS)) {
38 xprintf("failed to start write to %d\n", SSD1306_ADDRESS);
42 if (i2c_master_write(0x0 /* command byte follows */)) {
43 print("failed to write control byte\n");
48 if (i2c_master_write(cmd)) {
49 xprintf("failed to write command %d\n", cmd);
58 // Write 2-byte command sequence.
59 // Returns true on success
60 static inline bool _send_cmd2(uint8_t cmd, uint8_t opr) {
61 if (!_send_cmd1(cmd)) {
64 return _send_cmd1(opr);
67 // Write 3-byte command sequence.
68 // Returns true on success
69 static inline bool _send_cmd3(uint8_t cmd, uint8_t opr1, uint8_t opr2) {
70 if (!_send_cmd1(cmd)) {
73 if (!_send_cmd1(opr1)) {
76 return _send_cmd1(opr2);
79 #define send_cmd1(c) if (!_send_cmd1(c)) {goto done;}
80 #define send_cmd2(c,o) if (!_send_cmd2(c,o)) {goto done;}
81 #define send_cmd3(c,o1,o2) if (!_send_cmd3(c,o1,o2)) {goto done;}
83 static void clear_display(void) {
84 matrix_clear(&display);
86 // Clear all of the display bits (there can be random noise
87 // in the RAM on startup)
88 send_cmd3(PageAddr, 0, (DisplayHeight / 8) - 1);
89 send_cmd3(ColumnAddr, 0, DisplayWidth - 1);
91 if (i2c_start_write(SSD1306_ADDRESS)) {
94 if (i2c_master_write(0x40)) {
98 for (uint8_t row = 0; row < MatrixRows; ++row) {
99 for (uint8_t col = 0; col < DisplayWidth; ++col) {
104 display.dirty = false;
112 static int8_t capture_sendchar(uint8_t c) {
114 iota_gfx_write_char(c);
123 bool iota_gfx_init(void) {
124 bool success = false;
126 send_cmd1(DisplayOff);
127 send_cmd2(SetDisplayClockDiv, 0x80);
128 send_cmd2(SetMultiPlex, DisplayHeight - 1);
130 send_cmd2(SetDisplayOffset, 0);
133 send_cmd1(SetStartLine | 0x0);
134 send_cmd2(SetChargePump, 0x14 /* Enable */);
135 send_cmd2(SetMemoryMode, 0 /* horizontal addressing */);
137 #ifdef OLED_ROTATE180
138 // the following Flip the display orientation 180 degrees
140 send_cmd1(ComScanInc);
142 #ifndef OLED_ROTATE180
143 // Flips the display orientation 0 degrees
144 send_cmd1(SegRemap | 0x1);
145 send_cmd1(ComScanDec);
148 send_cmd2(SetComPins, 0x2);
149 send_cmd2(SetContrast, 0x8f);
150 send_cmd2(SetPreCharge, 0xf1);
151 send_cmd2(SetVComDetect, 0x40);
152 send_cmd1(DisplayAllOnResume);
153 send_cmd1(NormalDisplay);
154 send_cmd1(DeActivateScroll);
155 send_cmd1(DisplayOn);
157 send_cmd2(SetContrast, 0); // Dim
166 print_set_sendchar(capture_sendchar);
173 bool iota_gfx_off(void) {
174 bool success = false;
176 send_cmd1(DisplayOff);
183 bool iota_gfx_on(void) {
184 bool success = false;
186 send_cmd1(DisplayOn);
193 void matrix_write_char_inner(struct CharacterMatrix *matrix, uint8_t c) {
197 if (matrix->cursor - &matrix->display[0][0] == sizeof(matrix->display)) {
198 // We went off the end; scroll the display upwards by one line
199 memmove(&matrix->display[0], &matrix->display[1],
200 MatrixCols * (MatrixRows - 1));
201 matrix->cursor = &matrix->display[MatrixRows - 1][0];
202 memset(matrix->cursor, ' ', MatrixCols);
206 void matrix_write_char(struct CharacterMatrix *matrix, uint8_t c) {
207 matrix->dirty = true;
210 // Clear to end of line from the cursor and then move to the
211 // start of the next line
212 uint8_t cursor_col = (matrix->cursor - &matrix->display[0][0]) % MatrixCols;
214 while (cursor_col++ < MatrixCols) {
215 matrix_write_char_inner(matrix, ' ');
220 matrix_write_char_inner(matrix, c);
223 void iota_gfx_write_char(uint8_t c) {
224 matrix_write_char(&display, c);
227 void matrix_write(struct CharacterMatrix *matrix, const char *data) {
228 const char *end = data + strlen(data);
230 matrix_write_char(matrix, *data);
235 void iota_gfx_write(const char *data) {
236 matrix_write(&display, data);
239 void matrix_write_P(struct CharacterMatrix *matrix, const char *data) {
241 uint8_t c = pgm_read_byte(data);
245 matrix_write_char(matrix, c);
250 void iota_gfx_write_P(const char *data) {
251 matrix_write_P(&display, data);
254 void matrix_clear(struct CharacterMatrix *matrix) {
255 memset(matrix->display, ' ', sizeof(matrix->display));
256 matrix->cursor = &matrix->display[0][0];
257 matrix->dirty = true;
260 void iota_gfx_clear_screen(void) {
261 matrix_clear(&display);
264 void matrix_render(struct CharacterMatrix *matrix) {
265 last_flush = timer_read();
271 // Move to the home position
272 send_cmd3(PageAddr, 0, MatrixRows - 1);
273 send_cmd3(ColumnAddr, 0, (MatrixCols * FontWidth) - 1);
275 if (i2c_start_write(SSD1306_ADDRESS)) {
278 if (i2c_master_write(0x40)) {
283 for (uint8_t row = 0; row < MatrixRows; ++row) {
284 for (uint8_t col = 0; col < MatrixCols; ++col) {
285 const uint8_t *glyph = font + (matrix->display[row][col] * (FontWidth - 1));
287 for (uint8_t glyphCol = 0; glyphCol < FontWidth - 1; ++glyphCol) {
288 uint8_t colBits = pgm_read_byte(glyph + glyphCol);
289 i2c_master_write(colBits);
292 // 1 column of space between chars (it's not included in the glyph)
297 matrix->dirty = false;
306 void iota_gfx_flush(void) {
307 matrix_render(&display);
310 __attribute__ ((weak))
311 void iota_gfx_task_user(void) {
314 void iota_gfx_task(void) {
315 iota_gfx_task_user();
321 if (timer_elapsed(last_flush) > ScreenOffInterval) {