paul@3 | 1 | // Copyright 2013 Pervasive Displays, Inc. |
paul@3 | 2 | // |
paul@3 | 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
paul@3 | 4 | // you may not use this file except in compliance with the License. |
paul@3 | 5 | // You may obtain a copy of the License at: |
paul@3 | 6 | // |
paul@3 | 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
paul@3 | 8 | // |
paul@3 | 9 | // Unless required by applicable law or agreed to in writing, |
paul@3 | 10 | // software distributed under the License is distributed on an |
paul@3 | 11 | // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either |
paul@3 | 12 | // express or implied. See the License for the specific language |
paul@3 | 13 | // governing permissions and limitations under the License. |
paul@3 | 14 | |
paul@3 | 15 | |
paul@3 | 16 | #include "EPD.h" |
paul@4 | 17 | #include "bsp.h" |
paul@4 | 18 | #include <stdio.h> |
paul@3 | 19 | |
paul@4 | 20 | static void EPD_line(uint16_t line, const uint8_t *data, uint8_t fixed_value, EPD_stage stage); |
paul@3 | 21 | static void SPI_send(const uint8_t *buffer, uint16_t length); |
paul@3 | 22 | static void SPI_put(uint8_t c); |
paul@3 | 23 | static void SPI_put_wait(uint8_t c); |
paul@3 | 24 | |
paul@3 | 25 | static void epd_pwm_active(uint16_t delayInMs); |
paul@3 | 26 | |
paul@3 | 27 | |
paul@3 | 28 | // inline arrays |
paul@3 | 29 | #define ARRAY(type, ...) ((type[]){__VA_ARGS__}) |
paul@3 | 30 | #define CU8(...) (ARRAY(const uint8_t, __VA_ARGS__)) |
paul@3 | 31 | |
paul@3 | 32 | static COG_Parameters_t epd; |
paul@3 | 33 | |
paul@3 | 34 | /****************************************************************************** |
paul@3 | 35 | * Local functions |
paul@3 | 36 | *****************************************************************************/ |
paul@3 | 37 | |
paul@3 | 38 | |
paul@3 | 39 | // convert a temperature in Celcius to |
paul@3 | 40 | // the scale factor for frame_*_repeat methods |
paul@3 | 41 | static int16_t EPD_temperature_to_factor_10x(int16_t temperature) { |
paul@3 | 42 | if (temperature <= -10) { |
paul@3 | 43 | return 170; |
paul@3 | 44 | } else if (temperature <= -5) { |
paul@3 | 45 | return 120; |
paul@3 | 46 | } else if (temperature <= 5) { |
paul@3 | 47 | return 80; |
paul@3 | 48 | } else if (temperature <= 10) { |
paul@3 | 49 | return 40; |
paul@3 | 50 | } else if (temperature <= 15) { |
paul@3 | 51 | return 30; |
paul@3 | 52 | } else if (temperature <= 20) { |
paul@3 | 53 | return 20; |
paul@3 | 54 | } else if (temperature <= 40) { |
paul@3 | 55 | return 10; |
paul@3 | 56 | } |
paul@3 | 57 | return 7; |
paul@3 | 58 | } |
paul@3 | 59 | |
paul@3 | 60 | |
paul@3 | 61 | // One frame of data is the number of lines * rows. For example: |
paul@3 | 62 | // The 1.44??? frame of data is 96 lines * 128 dots. |
paul@3 | 63 | // The 2??? frame of data is 96 lines * 200 dots. |
paul@3 | 64 | // The 2.7??? frame of data is 176 lines * 264 dots. |
paul@3 | 65 | |
paul@3 | 66 | // the image is arranged by line which matches the display size |
paul@3 | 67 | // so smallest would have 96 * 32 bytes |
paul@3 | 68 | |
paul@3 | 69 | static void EPD_frame_fixed(uint8_t fixed_value, EPD_stage stage) { |
paul@3 | 70 | uint8_t line; |
paul@3 | 71 | for (line = 0; line < epd.lines_per_display ; ++line) { |
paul@4 | 72 | EPD_line(line, 0, fixed_value, stage); |
paul@3 | 73 | } |
paul@3 | 74 | } |
paul@3 | 75 | |
paul@4 | 76 | static void EPD_frame_data(const uint8_t *image, EPD_stage stage){ |
paul@3 | 77 | uint8_t line; |
paul@3 | 78 | for (line = 0; line < epd.lines_per_display ; ++line) { |
paul@4 | 79 | EPD_line(line, &image[line * epd.bytes_per_line], 0, stage); |
paul@3 | 80 | } |
paul@3 | 81 | } |
paul@3 | 82 | |
paul@3 | 83 | |
paul@3 | 84 | static void EPD_frame_fixed_repeat(uint8_t fixed_value, EPD_stage stage) { |
paul@3 | 85 | int32_t stage_time = epd.factored_stage_time; |
paul@3 | 86 | do { |
paul@3 | 87 | uint32_t t_start = bsp_getMsTicks(); |
paul@3 | 88 | EPD_frame_fixed(fixed_value, stage); |
paul@3 | 89 | uint32_t t_end = bsp_getMsTicks(); |
paul@3 | 90 | if (t_end > t_start) { |
paul@3 | 91 | stage_time -= t_end - t_start; |
paul@3 | 92 | } else { |
paul@3 | 93 | stage_time -= t_start - t_end + 1 + 0xffffffffU; |
paul@3 | 94 | } |
paul@3 | 95 | } while (stage_time > 0); |
paul@3 | 96 | } |
paul@3 | 97 | |
paul@3 | 98 | |
paul@4 | 99 | static void EPD_frame_data_repeat(const uint8_t *image, EPD_stage stage) { |
paul@3 | 100 | int32_t stage_time = epd.factored_stage_time; |
paul@3 | 101 | do { |
paul@3 | 102 | uint32_t t_start = bsp_getMsTicks(); |
paul@3 | 103 | EPD_frame_data(image, stage); |
paul@3 | 104 | uint32_t t_end = bsp_getMsTicks(); |
paul@3 | 105 | if (t_end > t_start) { |
paul@3 | 106 | stage_time -= t_end - t_start; |
paul@3 | 107 | } else { |
paul@3 | 108 | stage_time -= t_start - t_end + 1 + 0xffffffffU; |
paul@3 | 109 | } |
paul@3 | 110 | } while (stage_time > 0); |
paul@3 | 111 | } |
paul@3 | 112 | |
paul@4 | 113 | static void EPD_line(uint16_t line, const uint8_t *data, uint8_t fixed_value, EPD_stage stage) { |
paul@3 | 114 | // charge pump voltage levels |
paul@3 | 115 | bsp_delayUs(10); |
paul@3 | 116 | SPI_send(CU8(0x70, 0x04), 2); |
paul@3 | 117 | bsp_delayUs(10); |
paul@3 | 118 | SPI_send(epd.gate_source, epd.gate_source_length); |
paul@3 | 119 | |
paul@3 | 120 | // send data |
paul@3 | 121 | bsp_delayUs(10); |
paul@3 | 122 | SPI_send(CU8(0x70, 0x0a), 2); |
paul@3 | 123 | bsp_delayUs(10); |
paul@3 | 124 | |
paul@3 | 125 | // CS low |
paul@3 | 126 | EPD_Pin_EPD_CS(LOW); |
paul@3 | 127 | SPI_put_wait(0x72); |
paul@3 | 128 | |
paul@3 | 129 | // even pixels |
paul@3 | 130 | uint16_t b; |
paul@3 | 131 | for (b = epd.bytes_per_line; b > 0; --b) { |
paul@3 | 132 | if (0 != data) { |
paul@3 | 133 | uint8_t pixels = data[b - 1] & 0xaa; |
paul@3 | 134 | switch(stage) { |
paul@3 | 135 | case EPD_compensate: // B -> W, W -> B (Current Image) |
paul@3 | 136 | pixels = 0xaa | ((pixels ^ 0xaa) >> 1); |
paul@3 | 137 | break; |
paul@3 | 138 | case EPD_white: // B -> N, W -> W (Current Image) |
paul@3 | 139 | pixels = 0x55 + ((pixels ^ 0xaa) >> 1); |
paul@3 | 140 | break; |
paul@3 | 141 | case EPD_inverse: // B -> N, W -> B (New Image) |
paul@3 | 142 | pixels = 0x55 | (pixels ^ 0xaa); |
paul@3 | 143 | break; |
paul@3 | 144 | case EPD_normal: // B -> B, W -> W (New Image) |
paul@3 | 145 | pixels = 0xaa | (pixels >> 1); |
paul@3 | 146 | break; |
paul@3 | 147 | } |
paul@3 | 148 | SPI_put_wait(pixels); |
paul@3 | 149 | } else { |
paul@3 | 150 | SPI_put_wait(fixed_value); |
paul@3 | 151 | } } |
paul@3 | 152 | |
paul@3 | 153 | // scan line |
paul@3 | 154 | for (b = 0; b < epd.bytes_per_scan; ++b) { |
paul@3 | 155 | if (line / 4 == b) { |
paul@3 | 156 | SPI_put_wait(0xc0 >> (2 * (line & 0x03))); |
paul@3 | 157 | } else { |
paul@3 | 158 | SPI_put_wait(0x00); |
paul@3 | 159 | } |
paul@3 | 160 | } |
paul@3 | 161 | |
paul@3 | 162 | // odd pixels |
paul@3 | 163 | for (b = 0; b < epd.bytes_per_line; ++b) { |
paul@3 | 164 | if (0 != data) { |
paul@3 | 165 | uint8_t pixels = data[b] & 0x55; |
paul@3 | 166 | switch(stage) { |
paul@3 | 167 | case EPD_compensate: // B -> W, W -> B (Current Image) |
paul@3 | 168 | pixels = 0xaa | (pixels ^ 0x55); |
paul@3 | 169 | break; |
paul@3 | 170 | case EPD_white: // B -> N, W -> W (Current Image) |
paul@3 | 171 | pixels = 0x55 + (pixels ^ 0x55); |
paul@3 | 172 | break; |
paul@3 | 173 | case EPD_inverse: // B -> N, W -> B (New Image) |
paul@3 | 174 | pixels = 0x55 | ((pixels ^ 0x55) << 1); |
paul@3 | 175 | break; |
paul@3 | 176 | case EPD_normal: // B -> B, W -> W (New Image) |
paul@3 | 177 | pixels = 0xaa | pixels; |
paul@3 | 178 | break; |
paul@3 | 179 | } |
paul@3 | 180 | uint8_t p1 = (pixels >> 6) & 0x03; |
paul@3 | 181 | uint8_t p2 = (pixels >> 4) & 0x03; |
paul@3 | 182 | uint8_t p3 = (pixels >> 2) & 0x03; |
paul@3 | 183 | uint8_t p4 = (pixels >> 0) & 0x03; |
paul@3 | 184 | pixels = (p1 << 0) | (p2 << 2) | (p3 << 4) | (p4 << 6); |
paul@3 | 185 | SPI_put_wait(pixels); |
paul@3 | 186 | } else { |
paul@3 | 187 | SPI_put_wait(fixed_value); |
paul@3 | 188 | } |
paul@3 | 189 | } |
paul@3 | 190 | |
paul@3 | 191 | if (epd.filler == TRUE) { |
paul@3 | 192 | SPI_put_wait(0x00); |
paul@3 | 193 | } |
paul@3 | 194 | |
paul@3 | 195 | // CS high |
paul@3 | 196 | EPD_Pin_EPD_CS(HIGH); |
paul@3 | 197 | |
paul@3 | 198 | // output data to panel |
paul@3 | 199 | bsp_delayUs(10); |
paul@3 | 200 | SPI_send(CU8(0x70, 0x02), 2); |
paul@3 | 201 | bsp_delayUs(10); |
paul@3 | 202 | SPI_send(CU8(0x72, 0x2f), 2); |
paul@3 | 203 | } |
paul@3 | 204 | |
paul@3 | 205 | |
paul@3 | 206 | /****************************************************************************** |
paul@3 | 207 | * Public functions |
paul@3 | 208 | *****************************************************************************/ |
paul@3 | 209 | |
paul@3 | 210 | |
paul@3 | 211 | void EPD_init(EPD_size size) { |
paul@3 | 212 | static uint8_t cs[] = {0x72, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0xff, 0x00}; |
paul@3 | 213 | static uint8_t gs[] = {0x72, 0x03}; |
paul@3 | 214 | |
paul@3 | 215 | EPD_Pin_init(); |
paul@3 | 216 | |
paul@3 | 217 | epd.size = size; |
paul@3 | 218 | epd.stage_time = 480; // milliseconds |
paul@3 | 219 | epd.lines_per_display = 96; |
paul@3 | 220 | epd.dots_per_line = 128; |
paul@3 | 221 | epd.bytes_per_line = 128 / 8; |
paul@3 | 222 | epd.bytes_per_scan = 96 / 4; |
paul@3 | 223 | epd.filler = FALSE; |
paul@3 | 224 | epd.channel_select = cs; |
paul@3 | 225 | epd.channel_select_length = sizeof(cs); |
paul@3 | 226 | epd.gate_source = gs; |
paul@3 | 227 | epd.gate_source_length = sizeof(gs); |
paul@3 | 228 | |
paul@3 | 229 | // set up size structure |
paul@3 | 230 | switch (size) { |
paul@3 | 231 | default: |
paul@3 | 232 | case EPD_1_44: // default so no change |
paul@3 | 233 | break; |
paul@3 | 234 | |
paul@3 | 235 | case EPD_2_0: { |
paul@3 | 236 | epd.lines_per_display = 96; |
paul@3 | 237 | epd.dots_per_line = 200; |
paul@3 | 238 | epd.bytes_per_line = 200 / 8; |
paul@3 | 239 | epd.bytes_per_scan = 96 / 4; |
paul@3 | 240 | epd.filler = TRUE; |
paul@3 | 241 | cs[0] = 0x72; |
paul@3 | 242 | cs[1] = 0x00; |
paul@3 | 243 | cs[2] = 0x00; |
paul@3 | 244 | cs[3] = 0x00; |
paul@3 | 245 | cs[4] = 0x00; |
paul@3 | 246 | cs[5] = 0x01; |
paul@3 | 247 | cs[6] = 0xff; |
paul@3 | 248 | cs[7] = 0xe0; |
paul@3 | 249 | cs[8] = 0x00; |
paul@3 | 250 | gs[0] = 0x72; |
paul@3 | 251 | gs[1] = 0x03; |
paul@3 | 252 | break; |
paul@3 | 253 | } |
paul@3 | 254 | |
paul@3 | 255 | case EPD_2_7: { |
paul@3 | 256 | epd.stage_time = 630; // milliseconds |
paul@3 | 257 | epd.lines_per_display = 176; |
paul@3 | 258 | epd.dots_per_line = 264; |
paul@3 | 259 | epd.bytes_per_line = 264 / 8; |
paul@3 | 260 | epd.bytes_per_scan = 176 / 4; |
paul@3 | 261 | epd.filler = TRUE; |
paul@3 | 262 | cs[0] = 0x72; |
paul@3 | 263 | cs[1] = 0x00; |
paul@3 | 264 | cs[2] = 0x00; |
paul@3 | 265 | cs[3] = 0x00; |
paul@3 | 266 | cs[4] = 0x7f; |
paul@3 | 267 | cs[5] = 0xff; |
paul@3 | 268 | cs[6] = 0xfe; |
paul@3 | 269 | cs[7] = 0x00; |
paul@3 | 270 | cs[8] = 0x00; |
paul@3 | 271 | gs[0] = 0x72; |
paul@3 | 272 | gs[1] = 0x00; |
paul@3 | 273 | break; |
paul@3 | 274 | } |
paul@3 | 275 | } |
paul@3 | 276 | |
paul@3 | 277 | epd.factored_stage_time = epd.stage_time; |
paul@3 | 278 | } |
paul@3 | 279 | |
paul@3 | 280 | |
paul@3 | 281 | void EPD_begin(void) |
paul@3 | 282 | { |
paul@3 | 283 | // power up sequence |
paul@3 | 284 | SPI_put(0x00); |
paul@3 | 285 | |
paul@3 | 286 | EPD_Pin_RESET(LOW); |
paul@3 | 287 | EPD_Pin_PANEL_ON(LOW); |
paul@3 | 288 | EPD_Pin_DISCHARGE(LOW); |
paul@3 | 289 | EPD_Pin_BORDER(LOW); |
paul@3 | 290 | EPD_Pin_EPD_CS(LOW); |
paul@3 | 291 | |
paul@3 | 292 | // PWM_start(this->EPD_Pin_PWM); |
paul@3 | 293 | // Delay_ms(5); |
paul@3 | 294 | epd_pwm_active(5); |
paul@3 | 295 | EPD_Pin_PANEL_ON(HIGH); |
paul@3 | 296 | // Delay_ms(10); |
paul@3 | 297 | epd_pwm_active(10); |
paul@3 | 298 | |
paul@3 | 299 | EPD_Pin_RESET(HIGH); |
paul@3 | 300 | EPD_Pin_BORDER(HIGH); |
paul@3 | 301 | EPD_Pin_EPD_CS(HIGH); |
paul@3 | 302 | // Delay_ms(5); |
paul@3 | 303 | epd_pwm_active(5); |
paul@3 | 304 | |
paul@3 | 305 | EPD_Pin_RESET(LOW); |
paul@3 | 306 | // Delay_ms(5); |
paul@3 | 307 | epd_pwm_active(5); |
paul@3 | 308 | |
paul@3 | 309 | EPD_Pin_RESET(HIGH); |
paul@3 | 310 | // Delay_ms(5); |
paul@3 | 311 | epd_pwm_active(5); |
paul@3 | 312 | |
paul@3 | 313 | // wait for COG to become ready |
paul@3 | 314 | while (HIGH == epd_get_busy()) { |
paul@3 | 315 | epd_pwm_active(10); |
paul@3 | 316 | } |
paul@3 | 317 | |
paul@3 | 318 | // channel select |
paul@3 | 319 | bsp_delayUs(10); |
paul@3 | 320 | SPI_send(CU8(0x70, 0x01), 2); |
paul@3 | 321 | bsp_delayUs(10); |
paul@3 | 322 | SPI_send(epd.channel_select, epd.channel_select_length); |
paul@3 | 323 | |
paul@3 | 324 | // DC/DC frequency |
paul@3 | 325 | bsp_delayUs(10); |
paul@3 | 326 | SPI_send(CU8(0x70, 0x06), 2); |
paul@3 | 327 | bsp_delayUs(10); |
paul@3 | 328 | SPI_send(CU8(0x72, 0xff), 2); |
paul@3 | 329 | |
paul@3 | 330 | // high power mode osc |
paul@3 | 331 | bsp_delayUs(10); |
paul@3 | 332 | SPI_send(CU8(0x70, 0x07), 2); |
paul@3 | 333 | bsp_delayUs(10); |
paul@3 | 334 | SPI_send(CU8(0x72, 0x9d), 2); |
paul@3 | 335 | |
paul@3 | 336 | |
paul@3 | 337 | // disable ADC |
paul@3 | 338 | bsp_delayUs(10); |
paul@3 | 339 | SPI_send(CU8(0x70, 0x08), 2); |
paul@3 | 340 | bsp_delayUs(10); |
paul@3 | 341 | SPI_send(CU8(0x72, 0x00), 2); |
paul@3 | 342 | |
paul@3 | 343 | // Vcom level |
paul@3 | 344 | bsp_delayUs(10); |
paul@3 | 345 | SPI_send(CU8(0x70, 0x09), 2); |
paul@3 | 346 | bsp_delayUs(10); |
paul@3 | 347 | SPI_send(CU8(0x72, 0xd0, 0x00), 3); |
paul@3 | 348 | |
paul@3 | 349 | // gate and source voltage levels |
paul@3 | 350 | bsp_delayUs(10); |
paul@3 | 351 | SPI_send(CU8(0x70, 0x04), 2); |
paul@3 | 352 | bsp_delayUs(10); |
paul@3 | 353 | SPI_send(epd.gate_source, epd.gate_source_length); |
paul@3 | 354 | |
paul@3 | 355 | // Delay_ms(5); //??? |
paul@3 | 356 | epd_pwm_active(5); |
paul@3 | 357 | |
paul@3 | 358 | // driver latch on |
paul@3 | 359 | bsp_delayUs(10); |
paul@3 | 360 | SPI_send(CU8(0x70, 0x03), 2); |
paul@3 | 361 | bsp_delayUs(10); |
paul@3 | 362 | SPI_send(CU8(0x72, 0x01), 2); |
paul@3 | 363 | |
paul@3 | 364 | // driver latch off |
paul@3 | 365 | bsp_delayUs(10); |
paul@3 | 366 | SPI_send(CU8(0x70, 0x03), 2); |
paul@3 | 367 | bsp_delayUs(10); |
paul@3 | 368 | SPI_send(CU8(0x72, 0x00), 2); |
paul@3 | 369 | |
paul@3 | 370 | // Delay_ms(5); |
paul@3 | 371 | epd_pwm_active(5); |
paul@3 | 372 | |
paul@3 | 373 | // charge pump positive voltage on |
paul@3 | 374 | bsp_delayUs(10); |
paul@3 | 375 | SPI_send(CU8(0x70, 0x05), 2); |
paul@3 | 376 | bsp_delayUs(10); |
paul@3 | 377 | SPI_send(CU8(0x72, 0x01), 2); |
paul@3 | 378 | |
paul@3 | 379 | // final delay before PWM off |
paul@3 | 380 | // Delay_ms(30); |
paul@3 | 381 | // PWM_stop(this->EPD_Pin_PWM); |
paul@3 | 382 | epd_pwm_active(30); |
paul@3 | 383 | |
paul@3 | 384 | // charge pump negative voltage on |
paul@3 | 385 | bsp_delayUs(10); |
paul@3 | 386 | SPI_send(CU8(0x70, 0x05), 2); |
paul@3 | 387 | bsp_delayUs(10); |
paul@3 | 388 | SPI_send(CU8(0x72, 0x03), 2); |
paul@3 | 389 | |
paul@3 | 390 | bsp_delayMs(30); |
paul@3 | 391 | |
paul@3 | 392 | // Vcom driver on |
paul@3 | 393 | bsp_delayUs(10); |
paul@3 | 394 | SPI_send(CU8(0x70, 0x05), 2); |
paul@3 | 395 | bsp_delayUs(10); |
paul@3 | 396 | SPI_send(CU8(0x72, 0x0f), 2); |
paul@3 | 397 | |
paul@3 | 398 | bsp_delayMs(30); |
paul@3 | 399 | |
paul@3 | 400 | // output enable to disable |
paul@3 | 401 | bsp_delayUs(10); |
paul@3 | 402 | SPI_send(CU8(0x70, 0x02), 2); |
paul@3 | 403 | bsp_delayUs(10); |
paul@3 | 404 | SPI_send(CU8(0x72, 0x24), 2); |
paul@3 | 405 | } |
paul@3 | 406 | |
paul@3 | 407 | |
paul@3 | 408 | void EPD_end(void) { |
paul@3 | 409 | |
paul@3 | 410 | EPD_frame_fixed(0x55, EPD_normal); // dummy frame |
paul@4 | 411 | EPD_line(0x7fffu, 0, 0x55, EPD_normal); // dummy_line |
paul@3 | 412 | |
paul@3 | 413 | bsp_delayMs(25); |
paul@3 | 414 | |
paul@3 | 415 | EPD_Pin_BORDER(LOW); |
paul@3 | 416 | bsp_delayMs(30); |
paul@3 | 417 | |
paul@3 | 418 | EPD_Pin_BORDER(HIGH); |
paul@3 | 419 | |
paul@3 | 420 | // latch reset turn on |
paul@3 | 421 | bsp_delayUs(10); |
paul@3 | 422 | SPI_send(CU8(0x70, 0x03), 2); |
paul@3 | 423 | bsp_delayUs(10); |
paul@3 | 424 | SPI_send(CU8(0x72, 0x01), 2); |
paul@3 | 425 | |
paul@3 | 426 | // output enable off |
paul@3 | 427 | bsp_delayUs(10); |
paul@3 | 428 | SPI_send(CU8(0x70, 0x02), 2); |
paul@3 | 429 | bsp_delayUs(10); |
paul@3 | 430 | SPI_send(CU8(0x72, 0x05), 2); |
paul@3 | 431 | |
paul@3 | 432 | // Vcom power off |
paul@3 | 433 | bsp_delayUs(10); |
paul@3 | 434 | SPI_send(CU8(0x70, 0x05), 2); |
paul@3 | 435 | bsp_delayUs(10); |
paul@3 | 436 | SPI_send(CU8(0x72, 0x0e), 2); |
paul@3 | 437 | |
paul@3 | 438 | // power off negative charge pump |
paul@3 | 439 | bsp_delayUs(10); |
paul@3 | 440 | SPI_send(CU8(0x70, 0x05), 2); |
paul@3 | 441 | bsp_delayUs(10); |
paul@3 | 442 | SPI_send(CU8(0x72, 0x02), 2); |
paul@3 | 443 | |
paul@3 | 444 | // discharge |
paul@3 | 445 | bsp_delayUs(10); |
paul@3 | 446 | SPI_send(CU8(0x70, 0x04), 2); |
paul@3 | 447 | bsp_delayUs(10); |
paul@3 | 448 | SPI_send(CU8(0x72, 0x0c), 2); |
paul@3 | 449 | |
paul@3 | 450 | bsp_delayMs(120); |
paul@3 | 451 | |
paul@3 | 452 | // all charge pumps off |
paul@3 | 453 | bsp_delayUs(10); |
paul@3 | 454 | SPI_send(CU8(0x70, 0x05), 2); |
paul@3 | 455 | bsp_delayUs(10); |
paul@3 | 456 | SPI_send(CU8(0x72, 0x00), 2); |
paul@3 | 457 | |
paul@3 | 458 | // turn of osc |
paul@3 | 459 | bsp_delayUs(10); |
paul@3 | 460 | SPI_send(CU8(0x70, 0x07), 2); |
paul@3 | 461 | bsp_delayUs(10); |
paul@3 | 462 | SPI_send(CU8(0x72, 0x0d), 2); |
paul@3 | 463 | |
paul@3 | 464 | // discharge internal - 1 |
paul@3 | 465 | bsp_delayUs(10); |
paul@3 | 466 | SPI_send(CU8(0x70, 0x04), 2); |
paul@3 | 467 | bsp_delayUs(10); |
paul@3 | 468 | SPI_send(CU8(0x72, 0x50), 2); |
paul@3 | 469 | |
paul@3 | 470 | bsp_delayMs(40); |
paul@3 | 471 | |
paul@3 | 472 | // discharge internal - 2 |
paul@3 | 473 | bsp_delayUs(10); |
paul@3 | 474 | SPI_send(CU8(0x70, 0x04), 2); |
paul@3 | 475 | bsp_delayUs(10); |
paul@3 | 476 | SPI_send(CU8(0x72, 0xA0), 2); |
paul@3 | 477 | |
paul@3 | 478 | bsp_delayMs(40); |
paul@3 | 479 | |
paul@3 | 480 | // discharge internal - 3 |
paul@3 | 481 | bsp_delayUs(10); |
paul@3 | 482 | SPI_send(CU8(0x70, 0x04), 2); |
paul@3 | 483 | bsp_delayUs(10); |
paul@3 | 484 | SPI_send(CU8(0x72, 0x00), 2); |
paul@3 | 485 | |
paul@3 | 486 | // turn of power and all signals |
paul@3 | 487 | EPD_Pin_RESET(LOW); |
paul@3 | 488 | EPD_Pin_PANEL_ON(LOW); |
paul@3 | 489 | EPD_Pin_BORDER(LOW); |
paul@3 | 490 | EPD_Pin_EPD_CS(LOW); |
paul@3 | 491 | |
paul@3 | 492 | EPD_Pin_DISCHARGE(HIGH); |
paul@3 | 493 | |
paul@3 | 494 | SPI_put(0x00); |
paul@3 | 495 | |
paul@3 | 496 | bsp_delayMs(150); |
paul@3 | 497 | |
paul@3 | 498 | EPD_Pin_DISCHARGE(LOW); |
paul@3 | 499 | } |
paul@3 | 500 | |
paul@3 | 501 | |
paul@3 | 502 | void EPD_setFactor(int16_t temperature) { |
paul@3 | 503 | epd.factored_stage_time = epd.stage_time * EPD_temperature_to_factor_10x(temperature) / 10; |
paul@3 | 504 | } |
paul@3 | 505 | |
paul@3 | 506 | // clear display (anything -> white) |
paul@3 | 507 | void EPD_clear() { |
paul@3 | 508 | EPD_frame_fixed_repeat(0xff, EPD_compensate); |
paul@3 | 509 | EPD_frame_fixed_repeat(0xff, EPD_white); |
paul@3 | 510 | EPD_frame_fixed_repeat(0xaa, EPD_inverse); |
paul@3 | 511 | EPD_frame_fixed_repeat(0xaa, EPD_normal); |
paul@3 | 512 | } |
paul@3 | 513 | |
paul@4 | 514 | // assuming a clear (white) screen output an image |
paul@4 | 515 | void EPD_image(const uint8_t *image) { |
paul@3 | 516 | EPD_frame_fixed_repeat(0xaa, EPD_compensate); |
paul@3 | 517 | EPD_frame_fixed_repeat(0xaa, EPD_white); |
paul@3 | 518 | EPD_frame_data_repeat(image, EPD_inverse); |
paul@3 | 519 | EPD_frame_data_repeat(image, EPD_normal); |
paul@3 | 520 | } |
paul@3 | 521 | |
paul@4 | 522 | // change from old image to new image |
paul@4 | 523 | void EPD_image_change(const uint8_t *old_image, const uint8_t *new_image) { |
paul@3 | 524 | EPD_frame_data_repeat(old_image, EPD_compensate); |
paul@3 | 525 | EPD_frame_data_repeat(old_image, EPD_white); |
paul@3 | 526 | EPD_frame_data_repeat(new_image, EPD_inverse); |
paul@3 | 527 | EPD_frame_data_repeat(new_image, EPD_normal); |
paul@3 | 528 | } |
paul@3 | 529 | |
paul@3 | 530 | |
paul@3 | 531 | static void SPI_put(uint8_t c) { |
paul@3 | 532 | uint8_t placeholder = c; |
paul@3 | 533 | bsp_spiWrite(&placeholder, 1); |
paul@3 | 534 | } |
paul@3 | 535 | |
paul@3 | 536 | |
paul@3 | 537 | static void SPI_put_wait(uint8_t c) { |
paul@3 | 538 | |
paul@3 | 539 | SPI_put(c); |
paul@3 | 540 | |
paul@3 | 541 | // wait for COG ready |
paul@3 | 542 | while (HIGH == epd_get_busy()) { |
paul@3 | 543 | } |
paul@3 | 544 | } |
paul@3 | 545 | |
paul@3 | 546 | |
paul@3 | 547 | static void SPI_send(const uint8_t *buffer, uint16_t length) { |
paul@3 | 548 | // CS low |
paul@3 | 549 | EPD_Pin_EPD_CS(LOW); |
paul@3 | 550 | |
paul@3 | 551 | bsp_spiWrite((uint8_t*)buffer, length); |
paul@3 | 552 | |
paul@3 | 553 | // CS high |
paul@3 | 554 | EPD_Pin_EPD_CS(HIGH); |
paul@3 | 555 | } |
paul@3 | 556 | |
paul@3 | 557 | static void epd_pwm_active(uint16_t delayInMs) |
paul@3 | 558 | { |
paul@3 | 559 | uint16_t numOfIterations; |
paul@4 | 560 | uint32_t now = bsp_getMsTicks(); |
paul@3 | 561 | |
paul@3 | 562 | numOfIterations = delayInMs * 100; |
paul@3 | 563 | |
paul@3 | 564 | for(; numOfIterations > 0; numOfIterations--) |
paul@3 | 565 | { |
paul@4 | 566 | EPD_Pin_PWM(HIGH); |
paul@3 | 567 | bsp_delayUs(5); //100kHz |
paul@4 | 568 | EPD_Pin_PWM(LOW); |
paul@3 | 569 | bsp_delayUs(5); |
paul@3 | 570 | } |
paul@4 | 571 | |
paul@4 | 572 | printf("PWM done for %dms.\n", bsp_getMsTicks() - now); |
paul@3 | 573 | } |