Thu, 01 Nov 2018 16:54:03 +0100
Updated the README
0 | 1 | /* |
2 | * Author: LoBo (loboris@gmail.com, loboris.github) | |
3 | * | |
4 | * Module supporting SPI TFT displays based on ILI9341 & ILI9488 controllers | |
5 | * | |
6 | * HIGH SPEED LOW LEVEL DISPLAY FUNCTIONS | |
7 | * USING DIRECT or DMA SPI TRANSFER MODEs | |
8 | * | |
9 | */ | |
10 | ||
11 | #include <string.h> | |
12 | #include "tftspi.h" | |
13 | #include "esp_system.h" | |
14 | #include "freertos/task.h" | |
15 | #include "esp_heap_caps.h" | |
16 | #include "soc/spi_reg.h" | |
17 | ||
18 | // ==================================================== | |
19 | // ==== Global variables, default values ============== | |
20 | ||
21 | // Converts colors to grayscale if set to 1 | |
22 | uint8_t gray_scale = 0; | |
23 | // Spi clock for reading data from display memory in Hz | |
24 | uint32_t max_rdclock = 8000000; | |
25 | ||
26 | // Default display dimensions | |
27 | int _width = DEFAULT_TFT_DISPLAY_WIDTH; | |
28 | int _height = DEFAULT_TFT_DISPLAY_HEIGHT; | |
29 | ||
30 | // Display type, DISP_TYPE_ILI9488 or DISP_TYPE_ILI9341 | |
31 | uint8_t tft_disp_type = DEFAULT_DISP_TYPE; | |
32 | ||
33 | // Spi device handles for display and touch screen | |
34 | spi_lobo_device_handle_t disp_spi = NULL; | |
35 | spi_lobo_device_handle_t ts_spi = NULL; | |
36 | ||
37 | // ==================================================== | |
38 | ||
39 | ||
40 | static color_t *trans_cline = NULL; | |
41 | static uint8_t _dma_sending = 0; | |
42 | ||
43 | // RGB to GRAYSCALE constants | |
44 | // 0.2989 0.5870 0.1140 | |
45 | #define GS_FACT_R 0.2989 | |
46 | #define GS_FACT_G 0.4870 | |
47 | #define GS_FACT_B 0.2140 | |
48 | ||
49 | ||
50 | ||
51 | // ==== Functions ===================== | |
52 | ||
53 | //------------------------------------------------------ | |
54 | esp_err_t IRAM_ATTR wait_trans_finish(uint8_t free_line) | |
55 | { | |
56 | // Wait for SPI bus ready | |
57 | while (disp_spi->host->hw->cmd.usr); | |
58 | if ((free_line) && (trans_cline)) { | |
59 | free(trans_cline); | |
60 | trans_cline = NULL; | |
61 | } | |
62 | if (_dma_sending) { | |
63 | //Tell common code DMA workaround that our DMA channel is idle. If needed, the code will do a DMA reset. | |
64 | if (disp_spi->host->dma_chan) spi_lobo_dmaworkaround_idle(disp_spi->host->dma_chan); | |
65 | ||
66 | // Reset DMA | |
67 | disp_spi->host->hw->dma_conf.val |= SPI_OUT_RST|SPI_IN_RST|SPI_AHBM_RST|SPI_AHBM_FIFO_RST; | |
68 | disp_spi->host->hw->dma_out_link.start=0; | |
69 | disp_spi->host->hw->dma_in_link.start=0; | |
70 | disp_spi->host->hw->dma_conf.val &= ~(SPI_OUT_RST|SPI_IN_RST|SPI_AHBM_RST|SPI_AHBM_FIFO_RST); | |
71 | disp_spi->host->hw->dma_conf.out_data_burst_en=1; | |
72 | _dma_sending = 0; | |
73 | } | |
74 | return ESP_OK; | |
75 | } | |
76 | ||
77 | //------------------------------- | |
78 | esp_err_t IRAM_ATTR disp_select() | |
79 | { | |
80 | wait_trans_finish(1); | |
81 | return spi_lobo_device_select(disp_spi, 0); | |
82 | } | |
83 | ||
84 | //--------------------------------- | |
85 | esp_err_t IRAM_ATTR disp_deselect() | |
86 | { | |
87 | wait_trans_finish(1); | |
88 | return spi_lobo_device_deselect(disp_spi); | |
89 | } | |
90 | ||
91 | //--------------------------------------------------------------------------------------------------- | |
92 | static void IRAM_ATTR _spi_transfer_start(spi_lobo_device_handle_t spi_dev, int wrbits, int rdbits) { | |
93 | // Load send buffer | |
94 | spi_dev->host->hw->user.usr_mosi_highpart = 0; | |
95 | spi_dev->host->hw->mosi_dlen.usr_mosi_dbitlen = wrbits-1; | |
96 | spi_dev->host->hw->user.usr_mosi = 1; | |
97 | if (rdbits) { | |
98 | spi_dev->host->hw->miso_dlen.usr_miso_dbitlen = rdbits; | |
99 | spi_dev->host->hw->user.usr_miso = 1; | |
100 | } | |
101 | else { | |
102 | spi_dev->host->hw->miso_dlen.usr_miso_dbitlen = 0; | |
103 | spi_dev->host->hw->user.usr_miso = 0; | |
104 | } | |
105 | // Start transfer | |
106 | spi_dev->host->hw->cmd.usr = 1; | |
107 | // Wait for SPI bus ready | |
108 | while (spi_dev->host->hw->cmd.usr); | |
109 | } | |
110 | ||
111 | // Send 1 byte display command, display must be selected | |
112 | //------------------------------------------------ | |
113 | void IRAM_ATTR disp_spi_transfer_cmd(int8_t cmd) { | |
114 | // Wait for SPI bus ready | |
115 | while (disp_spi->host->hw->cmd.usr); | |
116 | ||
117 | // Set DC to 0 (command mode); | |
118 | gpio_set_level(PIN_NUM_DC, 0); | |
119 | ||
120 | disp_spi->host->hw->data_buf[0] = (uint32_t)cmd; | |
121 | _spi_transfer_start(disp_spi, 8, 0); | |
122 | } | |
123 | ||
124 | // Send command with data to display, display must be selected | |
125 | //---------------------------------------------------------------------------------- | |
126 | void IRAM_ATTR disp_spi_transfer_cmd_data(int8_t cmd, uint8_t *data, uint32_t len) { | |
127 | // Wait for SPI bus ready | |
128 | while (disp_spi->host->hw->cmd.usr); | |
129 | ||
130 | // Set DC to 0 (command mode); | |
131 | gpio_set_level(PIN_NUM_DC, 0); | |
132 | ||
133 | disp_spi->host->hw->data_buf[0] = (uint32_t)cmd; | |
134 | _spi_transfer_start(disp_spi, 8, 0); | |
135 | ||
136 | if ((len == 0) || (data == NULL)) return; | |
137 | ||
138 | // Set DC to 1 (data mode); | |
139 | gpio_set_level(PIN_NUM_DC, 1); | |
140 | ||
141 | uint8_t idx=0, bidx=0; | |
142 | uint32_t bits=0; | |
143 | uint32_t count=0; | |
144 | uint32_t wd = 0; | |
145 | while (count < len) { | |
146 | // get data byte from buffer | |
147 | wd |= (uint32_t)data[count] << bidx; | |
148 | count++; | |
149 | bits += 8; | |
150 | bidx += 8; | |
151 | if (count == len) { | |
152 | disp_spi->host->hw->data_buf[idx] = wd; | |
153 | break; | |
154 | } | |
155 | if (bidx == 32) { | |
156 | disp_spi->host->hw->data_buf[idx] = wd; | |
157 | idx++; | |
158 | bidx = 0; | |
159 | wd = 0; | |
160 | } | |
161 | if (idx == 16) { | |
162 | // SPI buffer full, send data | |
163 | _spi_transfer_start(disp_spi, bits, 0); | |
164 | ||
165 | bits = 0; | |
166 | idx = 0; | |
167 | bidx = 0; | |
168 | } | |
169 | } | |
170 | if (bits > 0) _spi_transfer_start(disp_spi, bits, 0); | |
171 | } | |
172 | ||
173 | // Set the address window for display write & read commands, display must be selected | |
174 | //--------------------------------------------------------------------------------------------------- | |
175 | static void IRAM_ATTR disp_spi_transfer_addrwin(uint16_t x1, uint16_t x2, uint16_t y1, uint16_t y2) { | |
176 | uint32_t wd; | |
177 | ||
178 | taskDISABLE_INTERRUPTS(); | |
179 | // Wait for SPI bus ready | |
180 | while (disp_spi->host->hw->cmd.usr); | |
181 | gpio_set_level(PIN_NUM_DC, 0); | |
182 | ||
183 | disp_spi->host->hw->data_buf[0] = (uint32_t)TFT_CASET; | |
184 | disp_spi->host->hw->user.usr_mosi_highpart = 0; | |
185 | disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 7; | |
186 | disp_spi->host->hw->user.usr_mosi = 1; | |
187 | disp_spi->host->hw->miso_dlen.usr_miso_dbitlen = 0; | |
188 | disp_spi->host->hw->user.usr_miso = 0; | |
189 | ||
190 | disp_spi->host->hw->cmd.usr = 1; // Start transfer | |
191 | ||
192 | wd = (uint32_t)(x1>>8); | |
193 | wd |= (uint32_t)(x1&0xff) << 8; | |
194 | wd |= (uint32_t)(x2>>8) << 16; | |
195 | wd |= (uint32_t)(x2&0xff) << 24; | |
196 | ||
197 | while (disp_spi->host->hw->cmd.usr); // wait transfer end | |
198 | gpio_set_level(PIN_NUM_DC, 1); | |
199 | disp_spi->host->hw->data_buf[0] = wd; | |
200 | disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 31; | |
201 | disp_spi->host->hw->cmd.usr = 1; // Start transfer | |
202 | ||
203 | while (disp_spi->host->hw->cmd.usr); | |
204 | gpio_set_level(PIN_NUM_DC, 0); | |
205 | disp_spi->host->hw->data_buf[0] = (uint32_t)TFT_PASET; | |
206 | disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 7; | |
207 | disp_spi->host->hw->cmd.usr = 1; // Start transfer | |
208 | ||
209 | wd = (uint32_t)(y1>>8); | |
210 | wd |= (uint32_t)(y1&0xff) << 8; | |
211 | wd |= (uint32_t)(y2>>8) << 16; | |
212 | wd |= (uint32_t)(y2&0xff) << 24; | |
213 | ||
214 | while (disp_spi->host->hw->cmd.usr); | |
215 | gpio_set_level(PIN_NUM_DC, 1); | |
216 | ||
217 | disp_spi->host->hw->data_buf[0] = wd; | |
218 | disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 31; | |
219 | disp_spi->host->hw->cmd.usr = 1; // Start transfer | |
220 | while (disp_spi->host->hw->cmd.usr); | |
221 | taskENABLE_INTERRUPTS(); | |
222 | } | |
223 | ||
224 | // Convert color to gray scale | |
225 | //---------------------------------------------- | |
226 | static color_t IRAM_ATTR color2gs(color_t color) | |
227 | { | |
228 | color_t _color; | |
229 | float gs_clr = GS_FACT_R * color.r + GS_FACT_G * color.g + GS_FACT_B * color.b; | |
230 | if (gs_clr > 255) gs_clr = 255; | |
231 | ||
232 | _color.r = (uint8_t)gs_clr; | |
233 | _color.g = (uint8_t)gs_clr; | |
234 | _color.b = (uint8_t)gs_clr; | |
235 | ||
236 | return _color; | |
237 | } | |
238 | ||
239 | // Set display pixel at given coordinates to given color | |
240 | //------------------------------------------------------------------------ | |
241 | void IRAM_ATTR drawPixel(int16_t x, int16_t y, color_t color, uint8_t sel) | |
242 | { | |
243 | if (!(disp_spi->cfg.flags & LB_SPI_DEVICE_HALFDUPLEX)) return; | |
244 | ||
245 | if (sel) { | |
246 | if (disp_select()) return; | |
247 | } | |
248 | else wait_trans_finish(1); | |
249 | ||
250 | uint32_t wd = 0; | |
251 | color_t _color = color; | |
252 | if (gray_scale) _color = color2gs(color); | |
253 | ||
254 | taskDISABLE_INTERRUPTS(); | |
255 | disp_spi_transfer_addrwin(x, x+1, y, y+1); | |
256 | ||
257 | // Send RAM WRITE command | |
258 | gpio_set_level(PIN_NUM_DC, 0); | |
259 | disp_spi->host->hw->data_buf[0] = (uint32_t)TFT_RAMWR; | |
260 | disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 7; | |
261 | disp_spi->host->hw->cmd.usr = 1; // Start transfer | |
262 | while (disp_spi->host->hw->cmd.usr); // Wait for SPI bus ready | |
263 | ||
264 | wd = (uint32_t)_color.r; | |
265 | wd |= (uint32_t)_color.g << 8; | |
266 | wd |= (uint32_t)_color.b << 16; | |
267 | ||
268 | // Set DC to 1 (data mode); | |
269 | gpio_set_level(PIN_NUM_DC, 1); | |
270 | ||
271 | disp_spi->host->hw->data_buf[0] = wd; | |
272 | disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 23; | |
273 | disp_spi->host->hw->cmd.usr = 1; // Start transfer | |
274 | while (disp_spi->host->hw->cmd.usr); // Wait for SPI bus ready | |
275 | ||
276 | taskENABLE_INTERRUPTS(); | |
277 | if (sel) disp_deselect(); | |
278 | } | |
279 | ||
280 | //----------------------------------------------------------- | |
281 | static void IRAM_ATTR _dma_send(uint8_t *data, uint32_t size) | |
282 | { | |
283 | //Fill DMA descriptors | |
284 | spi_lobo_dmaworkaround_transfer_active(disp_spi->host->dma_chan); //mark channel as active | |
285 | spi_lobo_setup_dma_desc_links(disp_spi->host->dmadesc_tx, size, data, false); | |
286 | disp_spi->host->hw->user.usr_mosi_highpart=0; | |
287 | disp_spi->host->hw->dma_out_link.addr=(int)(&disp_spi->host->dmadesc_tx[0]) & 0xFFFFF; | |
288 | disp_spi->host->hw->dma_out_link.start=1; | |
289 | disp_spi->host->hw->user.usr_mosi_highpart=0; | |
290 | ||
291 | disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = (size * 8) - 1; | |
292 | ||
293 | _dma_sending = 1; | |
294 | // Start transfer | |
295 | disp_spi->host->hw->cmd.usr = 1; | |
296 | } | |
297 | ||
298 | //--------------------------------------------------------------------------- | |
299 | static void IRAM_ATTR _direct_send(color_t *color, uint32_t len, uint8_t rep) | |
300 | { | |
301 | uint32_t cidx = 0; // color buffer index | |
302 | uint32_t wd = 0; | |
303 | int idx = 0; | |
304 | int bits = 0; | |
305 | int wbits = 0; | |
306 | ||
307 | taskDISABLE_INTERRUPTS(); | |
308 | color_t _color = color[0]; | |
309 | if ((rep) && (gray_scale)) _color = color2gs(color[0]); | |
310 | ||
311 | while (len) { | |
312 | // ** Get color data from color buffer ** | |
313 | if (rep == 0) { | |
314 | if (gray_scale) _color = color2gs(color[cidx]); | |
315 | else _color = color[cidx]; | |
316 | } | |
317 | ||
318 | wd |= (uint32_t)_color.r << wbits; | |
319 | wbits += 8; | |
320 | if (wbits == 32) { | |
321 | bits += wbits; | |
322 | wbits = 0; | |
323 | disp_spi->host->hw->data_buf[idx++] = wd; | |
324 | wd = 0; | |
325 | } | |
326 | wd |= (uint32_t)_color.g << wbits; | |
327 | wbits += 8; | |
328 | if (wbits == 32) { | |
329 | bits += wbits; | |
330 | wbits = 0; | |
331 | disp_spi->host->hw->data_buf[idx++] = wd; | |
332 | wd = 0; | |
333 | } | |
334 | wd |= (uint32_t)_color.b << wbits; | |
335 | wbits += 8; | |
336 | if (wbits == 32) { | |
337 | bits += wbits; | |
338 | wbits = 0; | |
339 | disp_spi->host->hw->data_buf[idx++] = wd; | |
340 | wd = 0; | |
341 | } | |
342 | len--; // Decrement colors counter | |
343 | if (rep == 0) cidx++; // if not repeating color, increment color buffer index | |
344 | } | |
345 | if (bits) { | |
346 | while (disp_spi->host->hw->cmd.usr); // Wait for SPI bus ready | |
347 | disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = bits-1; // set number of bits to be sent | |
348 | disp_spi->host->hw->cmd.usr = 1; // Start transfer | |
349 | } | |
350 | taskENABLE_INTERRUPTS(); | |
351 | } | |
352 | ||
353 | // ================================================================ | |
354 | // === Main function to send data to display ====================== | |
355 | // If rep==true: repeat sending color data to display 'len' times | |
356 | // If rep==false: send 'len' color data from color buffer to display | |
357 | // ** Device must already be selected and address window set ** | |
358 | // ================================================================ | |
359 | //---------------------------------------------------------------------------------------------- | |
360 | static void IRAM_ATTR _TFT_pushColorRep(color_t *color, uint32_t len, uint8_t rep, uint8_t wait) | |
361 | { | |
362 | if (len == 0) return; | |
363 | if (!(disp_spi->cfg.flags & LB_SPI_DEVICE_HALFDUPLEX)) return; | |
364 | ||
365 | // Send RAM WRITE command | |
366 | gpio_set_level(PIN_NUM_DC, 0); | |
367 | disp_spi->host->hw->data_buf[0] = (uint32_t)TFT_RAMWR; | |
368 | disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 7; | |
369 | disp_spi->host->hw->cmd.usr = 1; // Start transfer | |
370 | while (disp_spi->host->hw->cmd.usr); // Wait for SPI bus ready | |
371 | ||
372 | gpio_set_level(PIN_NUM_DC, 1); // Set DC to 1 (data mode); | |
373 | ||
374 | if ((len*24) <= 512) { | |
375 | ||
376 | _direct_send(color, len, rep); | |
377 | ||
378 | } | |
379 | else if (rep == 0) { | |
380 | // ==== use DMA transfer ==== | |
381 | // ** Prepare data | |
382 | if (gray_scale) { | |
383 | for (int n=0; n<len; n++) { | |
384 | color[n] = color2gs(color[n]); | |
385 | } | |
386 | } | |
387 | ||
388 | _dma_send((uint8_t *)color, len*3); | |
389 | } | |
390 | else { | |
391 | // ==== Repeat color, more than 512 bits total ==== | |
392 | ||
393 | color_t _color; | |
394 | uint32_t buf_colors; | |
395 | int buf_bytes, to_send; | |
396 | ||
397 | /* | |
398 | to_send = len; | |
399 | while (to_send > 0) { | |
400 | wait_trans_finish(0); | |
401 | _direct_send(color, ((to_send > 21) ? 21 : to_send), rep); | |
402 | to_send -= 21; | |
403 | } | |
404 | */ | |
405 | ||
406 | buf_colors = ((len > (_width*2)) ? (_width*2) : len); | |
407 | buf_bytes = buf_colors * 3; | |
408 | ||
409 | // Prepare color buffer of maximum 2 color lines | |
410 | trans_cline = heap_caps_malloc(buf_bytes, MALLOC_CAP_DMA); | |
411 | if (trans_cline == NULL) return; | |
412 | ||
413 | // Prepare fill color | |
414 | if (gray_scale) _color = color2gs(color[0]); | |
415 | else _color = color[0]; | |
416 | ||
417 | // Fill color buffer with fill color | |
418 | for (uint32_t i=0; i<buf_colors; i++) { | |
419 | trans_cline[i] = _color; | |
420 | } | |
421 | ||
422 | // Send 'len' colors | |
423 | to_send = len; | |
424 | while (to_send > 0) { | |
425 | wait_trans_finish(0); | |
426 | _dma_send((uint8_t *)trans_cline, ((to_send > buf_colors) ? buf_bytes : (to_send*3))); | |
427 | to_send -= buf_colors; | |
428 | } | |
429 | } | |
430 | ||
431 | if (wait) wait_trans_finish(1); | |
432 | } | |
433 | ||
434 | // Write 'len' color data to TFT 'window' (x1,y2),(x2,y2) | |
435 | //------------------------------------------------------------------------------------------- | |
436 | void IRAM_ATTR TFT_pushColorRep(int x1, int y1, int x2, int y2, color_t color, uint32_t len) | |
437 | { | |
438 | if (disp_select() != ESP_OK) return; | |
439 | ||
440 | // ** Send address window ** | |
441 | disp_spi_transfer_addrwin(x1, x2, y1, y2); | |
442 | ||
443 | _TFT_pushColorRep(&color, len, 1, 1); | |
444 | ||
445 | disp_deselect(); | |
446 | } | |
447 | ||
448 | // Write 'len' color data to TFT 'window' (x1,y2),(x2,y2) from given buffer | |
449 | // ** Device must already be selected ** | |
450 | //----------------------------------------------------------------------------------- | |
451 | void IRAM_ATTR send_data(int x1, int y1, int x2, int y2, uint32_t len, color_t *buf) | |
452 | { | |
453 | // ** Send address window ** | |
454 | disp_spi_transfer_addrwin(x1, x2, y1, y2); | |
455 | _TFT_pushColorRep(buf, len, 0, 0); | |
456 | } | |
457 | ||
458 | // Reads 'len' pixels/colors from the TFT's GRAM 'window' | |
459 | // 'buf' is an array of bytes with 1st byte reserved for reading 1 dummy byte | |
460 | // and the rest is actually an array of color_t values | |
461 | //-------------------------------------------------------------------------------------------- | |
462 | int IRAM_ATTR read_data(int x1, int y1, int x2, int y2, int len, uint8_t *buf, uint8_t set_sp) | |
463 | { | |
464 | spi_lobo_transaction_t t; | |
465 | uint32_t current_clock = 0; | |
466 | ||
467 | memset(&t, 0, sizeof(t)); //Zero out the transaction | |
468 | memset(buf, 0, len*sizeof(color_t)); | |
469 | ||
470 | if (set_sp) { | |
471 | if (disp_deselect() != ESP_OK) return -1; | |
472 | // Change spi clock if needed | |
473 | current_clock = spi_lobo_get_speed(disp_spi); | |
474 | if (max_rdclock < current_clock) spi_lobo_set_speed(disp_spi, max_rdclock); | |
475 | } | |
476 | ||
477 | if (disp_select() != ESP_OK) return -2; | |
478 | ||
479 | // ** Send address window ** | |
480 | disp_spi_transfer_addrwin(x1, x2, y1, y2); | |
481 | ||
482 | // ** GET pixels/colors ** | |
483 | disp_spi_transfer_cmd(TFT_RAMRD); | |
484 | ||
485 | t.length=0; //Send nothing | |
486 | t.tx_buffer=NULL; | |
487 | t.rxlength=8*((len*3)+1); //Receive size in bits | |
488 | t.rx_buffer=buf; | |
489 | //t.user = (void*)1; | |
490 | ||
491 | esp_err_t res = spi_lobo_transfer_data(disp_spi, &t); // Receive using direct mode | |
492 | ||
493 | disp_deselect(); | |
494 | ||
495 | if (set_sp) { | |
496 | // Restore spi clock if needed | |
497 | if (max_rdclock < current_clock) spi_lobo_set_speed(disp_spi, current_clock); | |
498 | } | |
499 | ||
500 | return res; | |
501 | } | |
502 | ||
503 | // Reads one pixel/color from the TFT's GRAM at position (x,y) | |
504 | //----------------------------------------------- | |
505 | color_t IRAM_ATTR readPixel(int16_t x, int16_t y) | |
506 | { | |
507 | uint8_t color_buf[sizeof(color_t)+1] = {0}; | |
508 | ||
509 | read_data(x, y, x+1, y+1, 1, color_buf, 1); | |
510 | ||
511 | color_t color; | |
512 | color.r = color_buf[1]; | |
513 | color.g = color_buf[2]; | |
514 | color.b = color_buf[3]; | |
515 | return color; | |
516 | } | |
517 | ||
518 | // get 16-bit data from touch controller for specified type | |
519 | // ** Touch device must already be selected ** | |
520 | //---------------------------------------- | |
521 | int IRAM_ATTR touch_get_data(uint8_t type) | |
522 | { | |
523 | /* | |
524 | esp_err_t ret; | |
525 | spi_lobo_transaction_t t; | |
526 | memset(&t, 0, sizeof(t)); //Zero out the transaction | |
527 | uint8_t rxdata[2] = {0}; | |
528 | ||
529 | // send command byte & receive 2 byte response | |
530 | t.rxlength=8*2; | |
531 | t.rx_buffer=&rxdata; | |
532 | t.command = type; | |
533 | ||
534 | ret = spi_lobo_transfer_data(ts_spi, &t); // Transmit using direct mode | |
535 | ||
536 | if (ret != ESP_OK) res = -1; | |
537 | res = (((int)(rxdata[0] << 8) | (int)(rxdata[1])) >> 4); | |
538 | */ | |
539 | // spi_lobo_device_select(ts_spi, 0); | |
540 | ||
541 | ts_spi->host->hw->data_buf[0] = type; | |
542 | _spi_transfer_start(ts_spi, 24, 24); | |
543 | ||
544 | // printf("touch_get_data(%02X) %06x %02x %02x %02x ", type, ts_spi->host->hw->data_buf[0], | |
545 | // (ts_spi->host->hw->data_buf[0] & 0x0ff), | |
546 | // (ts_spi->host->hw->data_buf[0] >> 11 & 0x0ff), | |
547 | // (ts_spi->host->hw->data_buf[0] >> 19 & 0x0ff) ); | |
548 | uint16_t res = (uint16_t)(((ts_spi->host->hw->data_buf[0] >> 11 & 0x0ff) << 8) | (ts_spi->host->hw->data_buf[0] >> 19 & 0x0ff)); | |
549 | // printf("res=%d %04x\n", res, res); | |
550 | // spi_lobo_device_deselect(ts_spi); | |
551 | return res; | |
552 | } | |
553 | ||
554 | // ==== STMPE610 =============================================================== | |
555 | ||
556 | ||
557 | // ----- STMPE610 -------------------------------------------------------------------------- | |
558 | ||
559 | // Send 1 byte display command, display must be selected | |
560 | //--------------------------------------------------------- | |
561 | static void IRAM_ATTR stmpe610_write_reg(uint8_t reg, uint8_t val) { | |
562 | ||
563 | spi_lobo_device_select(ts_spi, 0); | |
564 | ||
565 | ts_spi->host->hw->data_buf[0] = (val << 8) | reg; | |
566 | _spi_transfer_start(ts_spi, 16, 0); | |
567 | ||
568 | spi_lobo_device_deselect(ts_spi); | |
569 | } | |
570 | ||
571 | //----------------------------------------------- | |
572 | static uint8_t IRAM_ATTR stmpe610_read_byte(uint8_t reg) { | |
573 | spi_lobo_device_select(ts_spi, 0); | |
574 | ||
575 | ts_spi->host->hw->data_buf[0] = (reg << 8) | (reg | 0x80); | |
576 | _spi_transfer_start(ts_spi, 16, 16); | |
577 | uint8_t res = ts_spi->host->hw->data_buf[0] >> 8; | |
578 | ||
579 | spi_lobo_device_deselect(ts_spi); | |
580 | return res; | |
581 | } | |
582 | ||
583 | //----------------------------------------- | |
584 | static uint16_t IRAM_ATTR stmpe610_read_word(uint8_t reg) { | |
585 | spi_lobo_device_select(ts_spi, 0); | |
586 | ||
587 | ts_spi->host->hw->data_buf[0] = ((((reg+1) << 8) | ((reg+1) | 0x80)) << 16) | (reg << 8) | (reg | 0x80); | |
588 | _spi_transfer_start(ts_spi, 32, 32); | |
589 | uint16_t res = (uint16_t)(ts_spi->host->hw->data_buf[0] & 0xFF00); | |
590 | res |= (uint16_t)(ts_spi->host->hw->data_buf[0] >> 24); | |
591 | ||
592 | spi_lobo_device_deselect(ts_spi); | |
593 | return res; | |
594 | } | |
595 | ||
596 | //----------------------- | |
597 | uint32_t stmpe610_getID() | |
598 | { | |
599 | uint16_t tid = stmpe610_read_word(0); | |
600 | uint8_t tver = stmpe610_read_byte(2); | |
601 | return (tid << 8) | tver; | |
602 | } | |
603 | ||
604 | //================== | |
605 | void stmpe610_Init() | |
606 | { | |
607 | stmpe610_write_reg(STMPE610_REG_SYS_CTRL1, 0x02); // Software chip reset | |
608 | vTaskDelay(10 / portTICK_RATE_MS); | |
609 | ||
610 | stmpe610_write_reg(STMPE610_REG_SYS_CTRL2, 0x04); // Temperature sensor clock off, GPIO clock off, touch clock on, ADC clock on | |
611 | ||
612 | stmpe610_write_reg(STMPE610_REG_INT_EN, 0x00); // Don't Interrupt on INT pin | |
613 | ||
614 | stmpe610_write_reg(STMPE610_REG_ADC_CTRL1, 0x48); // ADC conversion time = 80 clock ticks, 12-bit ADC, internal voltage refernce | |
615 | vTaskDelay(2 / portTICK_RATE_MS); | |
616 | stmpe610_write_reg(STMPE610_REG_ADC_CTRL2, 0x01); // ADC speed 3.25MHz | |
617 | stmpe610_write_reg(STMPE610_REG_GPIO_AF, 0x00); // GPIO alternate function - OFF | |
618 | stmpe610_write_reg(STMPE610_REG_TSC_CFG, 0xE3); // Averaging 8, touch detect delay 1ms, panel driver settling time 1ms | |
619 | stmpe610_write_reg(STMPE610_REG_FIFO_TH, 0x01); // FIFO threshold = 1 | |
620 | stmpe610_write_reg(STMPE610_REG_FIFO_STA, 0x01); // FIFO reset enable | |
621 | stmpe610_write_reg(STMPE610_REG_FIFO_STA, 0x00); // FIFO reset disable | |
622 | stmpe610_write_reg(STMPE610_REG_TSC_FRACT_XYZ, 0x07); // Z axis data format | |
623 | stmpe610_write_reg(STMPE610_REG_TSC_I_DRIVE, 0x01); // max 50mA touchscreen line current | |
624 | stmpe610_write_reg(STMPE610_REG_TSC_CTRL, 0x30); // X&Y&Z, 16 reading window | |
625 | stmpe610_write_reg(STMPE610_REG_TSC_CTRL, 0x31); // X&Y&Z, 16 reading window, TSC enable | |
626 | stmpe610_write_reg(STMPE610_REG_INT_STA, 0xFF); // Clear all interrupts | |
627 | stmpe610_write_reg(STMPE610_REG_INT_CTRL, 0x00); // Level interrupt, disable interrupts | |
628 | } | |
629 | ||
630 | //=========================================================== | |
631 | int stmpe610_get_touch(uint16_t *x, uint16_t *y, uint16_t *z) | |
632 | { | |
633 | if (!(stmpe610_read_byte(STMPE610_REG_TSC_CTRL) & 0x80)) return 0; | |
634 | ||
635 | // Get touch data | |
636 | uint8_t fifo_size = stmpe610_read_byte(STMPE610_REG_FIFO_SIZE); | |
637 | while (fifo_size < 2) { | |
638 | if (!(stmpe610_read_byte(STMPE610_REG_TSC_CTRL) & 0x80)) return 0; | |
639 | fifo_size = stmpe610_read_byte(STMPE610_REG_FIFO_SIZE); | |
640 | } | |
641 | while (fifo_size > 120) { | |
642 | if (!(stmpe610_read_byte(STMPE610_REG_TSC_CTRL) & 0x80)) return 0; | |
643 | *x = stmpe610_read_word(STMPE610_REG_TSC_DATA_X); | |
644 | *y = stmpe610_read_word(STMPE610_REG_TSC_DATA_Y); | |
645 | *z = stmpe610_read_byte(STMPE610_REG_TSC_DATA_Z); | |
646 | fifo_size = stmpe610_read_byte(STMPE610_REG_FIFO_SIZE); | |
647 | } | |
648 | for (uint8_t i=0; i < (fifo_size-1); i++) { | |
649 | *x = stmpe610_read_word(STMPE610_REG_TSC_DATA_X); | |
650 | *y = stmpe610_read_word(STMPE610_REG_TSC_DATA_Y); | |
651 | *z = stmpe610_read_byte(STMPE610_REG_TSC_DATA_Z); | |
652 | } | |
653 | ||
654 | *x = 4096 - *x; | |
655 | /* | |
656 | // Clear the rest of the fifo | |
657 | { | |
658 | stmpe610_write_reg(STMPE610_REG_FIFO_STA, 0x01); // FIFO reset enable | |
659 | stmpe610_write_reg(STMPE610_REG_FIFO_STA, 0x00); // FIFO reset disable | |
660 | } | |
661 | */ | |
662 | return 1; | |
663 | } | |
664 | ||
665 | // ==== STMPE610 =========================================================================== | |
666 | ||
667 | ||
668 | // Find maximum spi clock for successful read from display RAM | |
669 | // ** Must be used AFTER the display is initialized ** | |
670 | //====================== | |
671 | uint32_t find_rd_speed() | |
672 | { | |
673 | esp_err_t ret; | |
674 | color_t color; | |
675 | uint32_t max_speed = 1000000; | |
676 | uint32_t change_speed, cur_speed; | |
677 | int line_check; | |
678 | color_t *color_line = NULL; | |
679 | uint8_t *line_rdbuf = NULL; | |
680 | uint8_t gs = gray_scale; | |
681 | ||
682 | gray_scale = 0; | |
683 | cur_speed = spi_lobo_get_speed(disp_spi); | |
684 | ||
685 | color_line = malloc(_width*3); | |
686 | if (color_line == NULL) goto exit; | |
687 | ||
688 | line_rdbuf = malloc((_width*3)+1); | |
689 | if (line_rdbuf == NULL) goto exit; | |
690 | ||
691 | color_t *rdline = (color_t *)(line_rdbuf+1); | |
692 | ||
693 | // Fill test line with colors | |
694 | color = (color_t){0xEC,0xA8,0x74}; | |
695 | for (int x=0; x<_width; x++) { | |
696 | color_line[x] = color; | |
697 | } | |
698 | ||
699 | // Find maximum read spi clock | |
700 | for (uint32_t speed=2000000; speed<=cur_speed; speed += 1000000) { | |
701 | change_speed = spi_lobo_set_speed(disp_spi, speed); | |
702 | if (change_speed == 0) goto exit; | |
703 | ||
704 | memset(line_rdbuf, 0, _width*sizeof(color_t)+1); | |
705 | ||
706 | if (disp_select()) goto exit; | |
707 | // Write color line | |
708 | send_data(0, _height/2, _width-1, _height/2, _width, color_line); | |
709 | if (disp_deselect()) goto exit; | |
710 | ||
711 | // Read color line | |
712 | ret = read_data(0, _height/2, _width-1, _height/2, _width, line_rdbuf, 0); | |
713 | ||
714 | // Compare | |
715 | line_check = 0; | |
716 | if (ret == ESP_OK) { | |
717 | for (int y=0; y<_width; y++) { | |
718 | if ((color_line[y].r & 0xFC) != (rdline[y].r & 0xFC)) line_check = 1; | |
719 | else if ((color_line[y].g & 0xFC) != (rdline[y].g & 0xFC)) line_check = 1; | |
720 | else if ((color_line[y].b & 0xFC) != (rdline[y].b & 0xFC)) line_check = 1; | |
721 | if (line_check) break; | |
722 | } | |
723 | } | |
724 | else line_check = ret; | |
725 | ||
726 | if (line_check) break; | |
727 | max_speed = speed; | |
728 | } | |
729 | ||
730 | exit: | |
731 | gray_scale = gs; | |
732 | if (line_rdbuf) free(line_rdbuf); | |
733 | if (color_line) free(color_line); | |
734 | ||
735 | // restore spi clk | |
736 | change_speed = spi_lobo_set_speed(disp_spi, cur_speed); | |
737 | ||
738 | return max_speed; | |
739 | } | |
740 | ||
741 | //--------------------------------------------------------------------------- | |
742 | // Companion code to the initialization table. | |
743 | // Reads and issues a series of LCD commands stored in byte array | |
744 | //--------------------------------------------------------------------------- | |
745 | static void commandList(spi_lobo_device_handle_t spi, const uint8_t *addr) { | |
746 | uint8_t numCommands, numArgs, cmd; | |
747 | uint16_t ms; | |
748 | ||
749 | numCommands = *addr++; // Number of commands to follow | |
750 | while(numCommands--) { // For each command... | |
751 | cmd = *addr++; // save command | |
752 | numArgs = *addr++; // Number of args to follow | |
753 | ms = numArgs & TFT_CMD_DELAY; // If high bit set, delay follows args | |
754 | numArgs &= ~TFT_CMD_DELAY; // Mask out delay bit | |
755 | ||
756 | disp_spi_transfer_cmd_data(cmd, (uint8_t *)addr, numArgs); | |
757 | ||
758 | addr += numArgs; | |
759 | ||
760 | if(ms) { | |
761 | ms = *addr++; // Read post-command delay time (ms) | |
762 | if(ms == 255) ms = 500; // If 255, delay for 500 ms | |
763 | vTaskDelay(ms / portTICK_RATE_MS); | |
764 | } | |
765 | } | |
766 | } | |
767 | ||
768 | //================================== | |
769 | void _tft_setRotation(uint8_t rot) { | |
770 | uint8_t rotation = rot & 3; // can't be higher than 3 | |
771 | uint8_t send = 1; | |
772 | uint8_t madctl = 0; | |
773 | uint16_t tmp; | |
774 | ||
775 | if ((rotation & 1)) { | |
776 | // in landscape modes must be width > height | |
777 | if (_width < _height) { | |
778 | tmp = _width; | |
779 | _width = _height; | |
780 | _height = tmp; | |
781 | } | |
782 | } | |
783 | else { | |
784 | // in portrait modes must be width < height | |
785 | if (_width > _height) { | |
786 | tmp = _width; | |
787 | _width = _height; | |
788 | _height = tmp; | |
789 | } | |
790 | } | |
791 | #if TFT_INVERT_ROTATION | |
792 | switch (rotation) { | |
793 | case PORTRAIT: | |
794 | madctl = (MADCTL_MV | TFT_RGB_BGR); | |
795 | break; | |
796 | case LANDSCAPE: | |
797 | madctl = (MADCTL_MX | TFT_RGB_BGR); | |
798 | break; | |
799 | case PORTRAIT_FLIP: | |
800 | madctl = (MADCTL_MV | TFT_RGB_BGR); | |
801 | break; | |
802 | case LANDSCAPE_FLIP: | |
803 | madctl = (MADCTL_MY | TFT_RGB_BGR); | |
804 | break; | |
805 | } | |
806 | #elif TFT_INVERT_ROTATION1 | |
807 | switch (rotation) { | |
808 | case PORTRAIT: | |
809 | madctl = (MADCTL_MY | MADCTL_MX | TFT_RGB_BGR); | |
810 | break; | |
811 | case LANDSCAPE: | |
812 | madctl = (MADCTL_MY | MADCTL_MV | TFT_RGB_BGR); | |
813 | break; | |
814 | case PORTRAIT_FLIP: | |
815 | madctl = (TFT_RGB_BGR); | |
816 | break; | |
817 | case LANDSCAPE_FLIP: | |
818 | madctl = (MADCTL_MX | MADCTL_MV | TFT_RGB_BGR); | |
819 | break; | |
820 | } | |
821 | #elif TFT_INVERT_ROTATION2 | |
822 | switch (rotation) { | |
823 | case PORTRAIT: | |
824 | madctl = (MADCTL_MX | MADCTL_MV | TFT_RGB_BGR); | |
825 | break; | |
826 | case LANDSCAPE: | |
827 | madctl = (TFT_RGB_BGR); | |
828 | break; | |
829 | case PORTRAIT_FLIP: | |
830 | madctl = (MADCTL_MY | MADCTL_MV | TFT_RGB_BGR); | |
831 | break; | |
832 | case LANDSCAPE_FLIP: | |
833 | madctl = (MADCTL_MY | MADCTL_MX | TFT_RGB_BGR); | |
834 | break; | |
835 | } | |
836 | #else | |
837 | switch (rotation) { | |
838 | case PORTRAIT: | |
839 | madctl = (MADCTL_MX | TFT_RGB_BGR); | |
840 | break; | |
841 | case LANDSCAPE: | |
842 | madctl = (MADCTL_MV | TFT_RGB_BGR); | |
843 | break; | |
844 | case PORTRAIT_FLIP: | |
845 | madctl = (MADCTL_MY | TFT_RGB_BGR); | |
846 | break; | |
847 | case LANDSCAPE_FLIP: | |
848 | madctl = (MADCTL_MX | MADCTL_MY | MADCTL_MV | TFT_RGB_BGR); | |
849 | break; | |
850 | } | |
851 | #endif | |
852 | if (send) { | |
853 | if (disp_select() == ESP_OK) { | |
854 | disp_spi_transfer_cmd_data(TFT_MADCTL, &madctl, 1); | |
855 | disp_deselect(); | |
856 | } | |
857 | } | |
858 | ||
859 | } | |
860 | ||
861 | //================= | |
862 | void TFT_PinsInit() | |
863 | { | |
864 | // Route all used pins to GPIO control | |
865 | gpio_pad_select_gpio(PIN_NUM_CS); | |
866 | gpio_pad_select_gpio(PIN_NUM_MISO); | |
867 | gpio_pad_select_gpio(PIN_NUM_MOSI); | |
868 | gpio_pad_select_gpio(PIN_NUM_CLK); | |
869 | gpio_pad_select_gpio(PIN_NUM_DC); | |
870 | ||
871 | gpio_set_direction(PIN_NUM_MISO, GPIO_MODE_INPUT); | |
872 | gpio_set_pull_mode(PIN_NUM_MISO, GPIO_PULLUP_ONLY); | |
873 | gpio_set_direction(PIN_NUM_CS, GPIO_MODE_OUTPUT); | |
874 | gpio_set_direction(PIN_NUM_MOSI, GPIO_MODE_OUTPUT); | |
875 | gpio_set_direction(PIN_NUM_CLK, GPIO_MODE_OUTPUT); | |
876 | gpio_set_direction(PIN_NUM_DC, GPIO_MODE_OUTPUT); | |
877 | gpio_set_level(PIN_NUM_DC, 0); | |
878 | #if USE_TOUCH | |
879 | gpio_pad_select_gpio(PIN_NUM_TCS); | |
880 | gpio_set_direction(PIN_NUM_TCS, GPIO_MODE_OUTPUT); | |
881 | #endif | |
882 | #if PIN_NUM_BCKL | |
883 | gpio_pad_select_gpio(PIN_NUM_BCKL); | |
884 | gpio_set_direction(PIN_NUM_BCKL, GPIO_MODE_OUTPUT); | |
885 | gpio_set_level(PIN_NUM_BCKL, PIN_BCKL_OFF); | |
886 | #endif | |
887 | ||
888 | #if PIN_NUM_RST | |
889 | gpio_pad_select_gpio(PIN_NUM_RST); | |
890 | gpio_set_direction(PIN_NUM_RST, GPIO_MODE_OUTPUT); | |
891 | gpio_set_level(PIN_NUM_RST, 0); | |
892 | #endif | |
893 | } | |
894 | ||
895 | // Initialize the display | |
896 | // ==================== | |
897 | void TFT_display_init() | |
898 | { | |
899 | esp_err_t ret; | |
900 | ||
901 | #if PIN_NUM_RST | |
902 | //Reset the display | |
903 | gpio_set_level(PIN_NUM_RST, 0); | |
904 | vTaskDelay(20 / portTICK_RATE_MS); | |
905 | gpio_set_level(PIN_NUM_RST, 1); | |
906 | vTaskDelay(150 / portTICK_RATE_MS); | |
907 | #endif | |
908 | ||
909 | ret = disp_select(); | |
910 | assert(ret==ESP_OK); | |
911 | //Send all the initialization commands | |
912 | if (tft_disp_type == DISP_TYPE_ILI9341) { | |
913 | commandList(disp_spi, ILI9341_init); | |
914 | } | |
915 | else if (tft_disp_type == DISP_TYPE_ILI9488) { | |
916 | commandList(disp_spi, ILI9488_init); | |
917 | } | |
918 | else if (tft_disp_type == DISP_TYPE_ST7789V) { | |
919 | commandList(disp_spi, ST7789V_init); | |
920 | } | |
921 | else if (tft_disp_type == DISP_TYPE_ST7735) { | |
922 | commandList(disp_spi, STP7735_init); | |
923 | } | |
924 | else if (tft_disp_type == DISP_TYPE_ST7735R) { | |
925 | commandList(disp_spi, STP7735R_init); | |
926 | commandList(disp_spi, Rcmd2green); | |
927 | commandList(disp_spi, Rcmd3); | |
928 | } | |
929 | else if (tft_disp_type == DISP_TYPE_ST7735B) { | |
930 | commandList(disp_spi, STP7735R_init); | |
931 | commandList(disp_spi, Rcmd2red); | |
932 | commandList(disp_spi, Rcmd3); | |
933 | uint8_t dt = 0xC0; | |
934 | disp_spi_transfer_cmd_data(TFT_MADCTL, &dt, 1); | |
935 | } | |
936 | else assert(0); | |
937 | ||
938 | ret = disp_deselect(); | |
939 | assert(ret==ESP_OK); | |
940 | ||
941 | // Clear screen | |
942 | _tft_setRotation(PORTRAIT); | |
943 | TFT_pushColorRep(0, 0, _width-1, _height-1, (color_t){0,0,0}, (uint32_t)(_height*_width)); | |
944 | ||
945 | ///Enable backlight | |
946 | #if PIN_NUM_BCKL | |
947 | gpio_set_level(PIN_NUM_BCKL, PIN_BCKL_ON); | |
948 | #endif | |
949 | } | |
950 | ||
951 |