/* The MIT License (MIT) Copyright (c) 2016 Fred Sundvik Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef VISUALIZER_H #define VISUALIZER_H #include #include #include #include "config.h" #include "gfx.h" #ifdef LCD_BACKLIGHT_ENABLE #include "lcd_backlight.h" #endif #ifdef BACKLIGHT_ENABLE #include "backlight.h" #endif // use this function to merge both real_mods and oneshot_mods in a uint16_t uint8_t visualizer_get_mods(void); // This need to be called once at the start void visualizer_init(void); // This should be called at every matrix scan void visualizer_update(uint32_t default_state, uint32_t state, uint8_t mods, uint32_t leds); // This should be called when the keyboard goes to suspend state void visualizer_suspend(void); // This should be called when the keyboard wakes up from suspend state void visualizer_resume(void); // These functions are week, so they can be overridden by the keyboard // if needed GDisplay* get_lcd_display(void); GDisplay* get_led_display(void); // For emulator builds, this function need to be implemented #ifdef EMULATOR void draw_emulator(void); #endif // If you need support for more than 16 keyframes per animation, you can change this #define MAX_VISUALIZER_KEY_FRAMES 16 struct keyframe_animation_t; typedef struct { uint32_t layer; uint32_t default_layer; uint32_t leds; // See led.h for available statuses uint8_t mods; bool suspended; #ifdef BACKLIGHT_ENABLE uint8_t backlight_level; #endif #ifdef VISUALIZER_USER_DATA_SIZE uint8_t user_data[VISUALIZER_USER_DATA_SIZE]; #endif } visualizer_keyboard_status_t; // The state struct is used by the various keyframe functions // It's also used for setting the LCD color and layer text // from the user customized code typedef struct visualizer_state_t { // The user code should primarily be modifying these uint32_t target_lcd_color; const char* layer_text; // The user visualizer(and animation functions) can read these visualizer_keyboard_status_t status; // These are used by the animation functions uint32_t current_lcd_color; uint32_t prev_lcd_color; #ifdef LCD_ENABLE font_t font_fixed5x8; font_t font_dejavusansbold12; #endif } visualizer_state_t; // Any custom keyframe function should have this signature // return true to get continuous updates, otherwise you will only get one // update per frame typedef bool (*frame_func)(struct keyframe_animation_t*, visualizer_state_t*); // Represents a keyframe animation, so fields are internal to the system // while others are meant to be initialized by the user code typedef struct keyframe_animation_t { // These should be initialized int num_frames; bool loop; int frame_lengths[MAX_VISUALIZER_KEY_FRAMES]; frame_func frame_functions[MAX_VISUALIZER_KEY_FRAMES]; // Used internally by the system, and can also be read by // keyframe update functions int current_frame; int time_left_in_frame; bool first_update_of_frame; bool last_update_of_frame; bool need_update; } keyframe_animation_t; extern GDisplay* LCD_DISPLAY; extern GDisplay* LED_DISPLAY; void start_keyframe_animation(keyframe_animation_t* animation); void stop_keyframe_animation(keyframe_animation_t* animation); // This runs the next keyframe, but does not update the animation state // Useful for crossfades for example void run_next_keyframe(keyframe_animation_t* animation, visualizer_state_t* state); // The master can set userdata which will be transferred to the slave #ifdef VISUALIZER_USER_DATA_SIZE void visualizer_set_user_data(void* user_data); #endif // These functions have to be implemented by the user // Called regularly each time the state has changed (but not every scan loop) void update_user_visualizer_state(visualizer_state_t* state, visualizer_keyboard_status_t* prev_status); // Called when the computer goes to suspend, will also stop calling update_user_visualizer_state void user_visualizer_suspend(visualizer_state_t* state); // You have to start at least one animation as a response to the following two functions // When the animation has finished the visualizer will resume normal operation and start calling the // update_user_visualizer_state again // Called when the keyboard boots up void initialize_user_visualizer(visualizer_state_t* state); // Called when the computer resumes from a suspend void user_visualizer_resume(visualizer_state_t* state); #endif /* VISUALIZER_H */ >57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 
/*
             LUFA Library
     Copyright (C) Dean Camera, 2017.

  dean [at] fourwalledcubicle [dot] com
           www.lufa-lib.org
*/

/*
  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, distribute, and sell this
  software and its documentation for any purpose is hereby granted
  without fee, provided that the above copyright notice appear in
  all copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting
  documentation, and that the name of the author not be used in
  advertising or publicity pertaining to distribution of the
  software without specific, written prior permission.

  The author disclaims all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

/** \file
 *
 *  Functions to manage the physical Dataflash media, including reading and writing of
 *  blocks of data. These functions are called by the SCSI layer when data must be stored
 *  or retrieved to/from the physical storage media. If a different media is used (such
 *  as a SD card or EEPROM), functions similar to these will need to be generated.
 */

#define  INCLUDE_FROM_DATAFLASHMANAGER_C
#include "DataflashManager.h"

/** Writes blocks (OS blocks, not Dataflash pages) to the storage medium, the board Dataflash IC(s), from
 *  the pre-selected data OUT endpoint. This routine reads in OS sized blocks from the endpoint and writes
 *  them to the Dataflash in Dataflash page sized blocks.
 *
 *  \param[in] MSInterfaceInfo  Pointer to a structure containing a Mass Storage Class configuration and state
 *  \param[in] BlockAddress  Data block starting address for the write sequence
 *  \param[in] TotalBlocks   Number of blocks of data to write
 */
void DataflashManager_WriteBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
                                  const uint32_t BlockAddress,
                                  uint16_t TotalBlocks)
{
	uint16_t CurrDFPage          = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);
	uint16_t CurrDFPageByte      = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);
	uint8_t  CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);
	bool     UsingSecondBuffer   = false;

	/* Select the correct starting Dataflash IC for the block requested */
	Dataflash_SelectChipFromPage(CurrDFPage);

#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)
	/* Copy selected dataflash's current page contents to the Dataflash buffer */
	Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF1);
	Dataflash_SendAddressBytes(CurrDFPage, 0);
	Dataflash_WaitWhileBusy();
#endif

	/* Send the Dataflash buffer write command */
	Dataflash_SendByte(DF_CMD_BUFF1WRITE);
	Dataflash_SendAddressBytes(0, CurrDFPageByte);

	/* Wait until endpoint is ready before continuing */
	if (Endpoint_WaitUntilReady())
	  return;

	while (TotalBlocks)
	{
		uint8_t BytesInBlockDiv16 = 0;

		/* Write an endpoint packet sized data block to the Dataflash */
		while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))
		{
			/* Check if the endpoint is currently empty */
			if (!(Endpoint_IsReadWriteAllowed()))
			{
				/* Clear the current endpoint bank */
				Endpoint_ClearOUT();

				/* Wait until the host has sent another packet */
				if (Endpoint_WaitUntilReady())
				  return;
			}

			/* Check if end of Dataflash page reached */
			if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))
			{
				/* Write the Dataflash buffer contents back to the Dataflash page */
				Dataflash_WaitWhileBusy();
				Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);
				Dataflash_SendAddressBytes(CurrDFPage, 0);

				/* Reset the Dataflash buffer counter, increment the page counter */
				CurrDFPageByteDiv16 = 0;
				CurrDFPage++;

				/* Once all the Dataflash ICs have had their first buffers filled, switch buffers to maintain throughput */
				if (Dataflash_GetSelectedChip() == DATAFLASH_CHIP_MASK(DATAFLASH_TOTALCHIPS))
				  UsingSecondBuffer = !(UsingSecondBuffer);

				/* Select the next Dataflash chip based on the new Dataflash page index */
				Dataflash_SelectChipFromPage(CurrDFPage);

#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)
				/* If less than one Dataflash page remaining, copy over the existing page to preserve trailing data */
				if ((TotalBlocks * (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) < (DATAFLASH_PAGE_SIZE >> 4))
				{
					/* Copy selected dataflash's current page contents to the Dataflash buffer */
					Dataflash_WaitWhileBusy();
					Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_MAINMEMTOBUFF2 : DF_CMD_MAINMEMTOBUFF1);
					Dataflash_SendAddressBytes(CurrDFPage, 0);
					Dataflash_WaitWhileBusy();
				}
#endif

				/* Send the Dataflash buffer write command */
				Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2WRITE : DF_CMD_BUFF1WRITE);
				Dataflash_SendAddressBytes(0, 0);
			}

			/* Write one 16-byte chunk of data to the Dataflash */
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());
			Dataflash_SendByte(Endpoint_Read_8());

			/* Increment the Dataflash page 16 byte block counter */
			CurrDFPageByteDiv16++;

			/* Increment the block 16 byte block counter */
			BytesInBlockDiv16++;

			/* Check if the current command is being aborted by the host */
			if (MSInterfaceInfo->State.IsMassStoreReset)
			  return;
		}

		/* Decrement the blocks remaining counter */
		TotalBlocks--;
	}

	/* Write the Dataflash buffer contents back to the Dataflash page */
	Dataflash_WaitWhileBusy();
	Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);
	Dataflash_SendAddressBytes(CurrDFPage, 0x00);
	Dataflash_WaitWhileBusy();

	/* If the endpoint is empty, clear it ready for the next packet from the host */
	if (!(Endpoint_IsReadWriteAllowed()))
	  Endpoint_ClearOUT();

	/* Deselect all Dataflash chips */
	Dataflash_DeselectChip();
}

/** Reads blocks (OS blocks, not Dataflash pages) from the storage medium, the board Dataflash IC(s), into
 *  the pre-selected data IN endpoint. This routine reads in Dataflash page sized blocks from the Dataflash
 *  and writes them in OS sized blocks to the endpoint.
 *
 *  \param[in] MSInterfaceInfo  Pointer to a structure containing a Mass Storage Class configuration and state
 *  \param[in] BlockAddress  Data block starting address for the read sequence
 *  \param[in] TotalBlocks   Number of blocks of data to read
 */
void DataflashManager_ReadBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
                                 const uint32_t BlockAddress,
                                 uint16_t TotalBlocks)
{
	uint16_t CurrDFPage          = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);
	uint16_t CurrDFPageByte      = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);
	uint8_t  CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);

	/* Select the correct starting Dataflash IC for the block requested */
	Dataflash_SelectChipFromPage(CurrDFPage);

	/* Send the Dataflash main memory page read command */
	Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);
	Dataflash_SendAddressBytes(CurrDFPage, CurrDFPageByte);
	Dataflash_SendByte(0x00);
	Dataflash_SendByte(0x00);
	Dataflash_SendByte(0x00);
	Dataflash_SendByte(0x00);

	/* Wait until endpoint is ready before continuing */
	if (Endpoint_WaitUntilReady())
	  return;

	while (TotalBlocks)
	{
		uint8_t BytesInBlockDiv16 = 0;

		/* Read an endpoint packet sized data block from the Dataflash */
		while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))
		{
			/* Check if the endpoint is currently full */
			if (!(Endpoint_IsReadWriteAllowed()))
			{
				/* Clear the endpoint bank to send its contents to the host */
				Endpoint_ClearIN();

				/* Wait until the endpoint is ready for more data */
				if (Endpoint_WaitUntilReady())
				  return;
			}

			/* Check if end of Dataflash page reached */
			if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))
			{
				/* Reset the Dataflash buffer counter, increment the page counter */
				CurrDFPageByteDiv16 = 0;
				CurrDFPage++;

				/* Select the next Dataflash chip based on the new Dataflash page index */
				Dataflash_SelectChipFromPage(CurrDFPage);

				/* Send the Dataflash main memory page read command */
				Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);
				Dataflash_SendAddressBytes(CurrDFPage, 0);
				Dataflash_SendByte(0x00);
				Dataflash_SendByte(0x00);
				Dataflash_SendByte(0x00);
				Dataflash_SendByte(0x00);
			}

			/* Read one 16-byte chunk of data from the Dataflash */
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());
			Endpoint_Write_8(Dataflash_ReceiveByte());

			/* Increment the Dataflash page 16 byte block counter */
			CurrDFPageByteDiv16++;

			/* Increment the block 16 byte block counter */
			BytesInBlockDiv16++;

			/* Check if the current command is being aborted by the host */
			if (MSInterfaceInfo->State.IsMassStoreReset)
			  return;
		}

		/* Decrement the blocks remaining counter */
		TotalBlocks--;
	}

	/* If the endpoint is full, send its contents to the host */
	if (!(Endpoint_IsReadWriteAllowed()))
	  Endpoint_ClearIN();

	/* Deselect all Dataflash chips */
	Dataflash_DeselectChip();
}

/** Writes blocks (OS blocks, not Dataflash pages) to the storage medium, the board Dataflash IC(s), from
 *  the given RAM buffer. This routine reads in OS sized blocks from the buffer and writes them to the
 *  Dataflash in Dataflash page sized blocks. This can be linked to FAT libraries to write files to the
 *  Dataflash.
 *
 *  \param[in] BlockAddress  Data block starting address for the write sequence
 *  \param[in] TotalBlocks   Number of blocks of data to write
 *  \param[in] BufferPtr     Pointer to the data source RAM buffer
 */
void DataflashManager_WriteBlocks_RAM(const uint32_t BlockAddress,
                                      uint16_t TotalBlocks,
                                      const uint8_t* BufferPtr)
{
	uint16_t CurrDFPage          = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);
	uint16_t CurrDFPageByte      = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);
	uint8_t  CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);
	bool     UsingSecondBuffer   = false;

	/* Select the correct starting Dataflash IC for the block requested */
	Dataflash_SelectChipFromPage(CurrDFPage);

#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)
	/* Copy selected dataflash's current page contents to the Dataflash buffer */
	Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF1);
	Dataflash_SendAddressBytes(CurrDFPage, 0);
	Dataflash_WaitWhileBusy();
#endif

	/* Send the Dataflash buffer write command */
	Dataflash_SendByte(DF_CMD_BUFF1WRITE);
	Dataflash_SendAddressBytes(0, CurrDFPageByte);

	while (TotalBlocks)
	{
		uint8_t BytesInBlockDiv16 = 0;

		/* Write an endpoint packet sized data block to the Dataflash */
		while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))
		{
			/* Check if end of Dataflash page reached */
			if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))
			{
				/* Write the Dataflash buffer contents back to the Dataflash page */
				Dataflash_WaitWhileBusy();
				Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);
				Dataflash_SendAddressBytes(CurrDFPage, 0);

				/* Reset the Dataflash buffer counter, increment the page counter */
				CurrDFPageByteDiv16 = 0;
				CurrDFPage++;

				/* Once all the Dataflash ICs have had their first buffers filled, switch buffers to maintain throughput */
				if (Dataflash_GetSelectedChip() == DATAFLASH_CHIP_MASK(DATAFLASH_TOTALCHIPS))
				  UsingSecondBuffer = !(UsingSecondBuffer);

				/* Select the next Dataflash chip based on the new Dataflash page index */
				Dataflash_SelectChipFromPage(CurrDFPage);

#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE)
				/* If less than one Dataflash page remaining, copy over the existing page to preserve trailing data */
				if ((TotalBlocks * (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) < (DATAFLASH_PAGE_SIZE >> 4))
				{
					/* Copy selected dataflash's current page contents to the Dataflash buffer */
					Dataflash_WaitWhileBusy();
					Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_MAINMEMTOBUFF2 : DF_CMD_MAINMEMTOBUFF1);
					Dataflash_SendAddressBytes(CurrDFPage, 0);
					Dataflash_WaitWhileBusy();
				}
#endif

				/* Send the Dataflash buffer write command */
				Dataflash_ToggleSelectedChipCS();
				Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2WRITE : DF_CMD_BUFF1WRITE);
				Dataflash_SendAddressBytes(0, 0);
			}

			/* Write one 16-byte chunk of data to the Dataflash */
			for (uint8_t ByteNum = 0; ByteNum < 16; ByteNum++)
			  Dataflash_SendByte(*(BufferPtr++));

			/* Increment the Dataflash page 16 byte block counter */
			CurrDFPageByteDiv16++;

			/* Increment the block 16 byte block counter */
			BytesInBlockDiv16++;
		}

		/* Decrement the blocks remaining counter */
		TotalBlocks--;
	}

	/* Write the Dataflash buffer contents back to the Dataflash page */
	Dataflash_WaitWhileBusy();
	Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE);
	Dataflash_SendAddressBytes(CurrDFPage, 0x00);
	Dataflash_WaitWhileBusy();

	/* Deselect all Dataflash chips */
	Dataflash_DeselectChip();
}

/** Reads blocks (OS blocks, not Dataflash pages) from the storage medium, the board Dataflash IC(s), into
 *  the preallocated RAM buffer. This routine reads in Dataflash page sized blocks from the Dataflash
 *  and writes them in OS sized blocks to the given buffer. This can be linked to FAT libraries to read
 *  the files stored on the Dataflash.
 *
 *  \param[in] BlockAddress  Data block starting address for the read sequence
 *  \param[in] TotalBlocks   Number of blocks of data to read
 *  \param[out] BufferPtr    Pointer to the data destination RAM buffer
 */
void DataflashManager_ReadBlocks_RAM(const uint32_t BlockAddress,
                                     uint16_t TotalBlocks,
                                     uint8_t* BufferPtr)
{
	uint16_t CurrDFPage          = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE);
	uint16_t CurrDFPageByte      = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE);
	uint8_t  CurrDFPageByteDiv16 = (CurrDFPageByte >> 4);

	/* Select the correct starting Dataflash IC for the block requested */
	Dataflash_SelectChipFromPage(CurrDFPage);

	/* Send the Dataflash main memory page read command */
	Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);
	Dataflash_SendAddressBytes(CurrDFPage, CurrDFPageByte);
	Dataflash_SendByte(0x00);
	Dataflash_SendByte(0x00);
	Dataflash_SendByte(0x00);
	Dataflash_SendByte(0x00);

	while (TotalBlocks)
	{
		uint8_t BytesInBlockDiv16 = 0;

		/* Read an endpoint packet sized data block from the Dataflash */
		while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4))
		{
			/* Check if end of Dataflash page reached */
			if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4))
			{
				/* Reset the Dataflash buffer counter, increment the page counter */
				CurrDFPageByteDiv16 = 0;
				CurrDFPage++;

				/* Select the next Dataflash chip based on the new Dataflash page index */
				Dataflash_SelectChipFromPage(CurrDFPage);

				/* Send the Dataflash main memory page read command */
				Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD);
				Dataflash_SendAddressBytes(CurrDFPage, 0);
				Dataflash_SendByte(0x00);
				Dataflash_SendByte(0x00);
				Dataflash_SendByte(0x00);
				Dataflash_SendByte(0x00);
			}

			/* Read one 16-byte chunk of data from the Dataflash */
			for (uint8_t ByteNum = 0; ByteNum < 16; ByteNum++)
			  *(BufferPtr++) = Dataflash_ReceiveByte();

			/* Increment the Dataflash page 16 byte block counter */
			CurrDFPageByteDiv16++;

			/* Increment the block 16 byte block counter */
			BytesInBlockDiv16++;
		}

		/* Decrement the blocks remaining counter */
		TotalBlocks--;
	}

	/* Deselect all Dataflash chips */
	Dataflash_DeselectChip();
}

/** Disables the Dataflash memory write protection bits on the board Dataflash ICs, if enabled. */
void DataflashManager_ResetDataflashProtections(void)
{
	/* Select first Dataflash chip, send the read status register command */
	Dataflash_SelectChip(DATAFLASH_CHIP1);
	Dataflash_SendByte(DF_CMD_GETSTATUS);

	/* Check if sector protection is enabled */
	if (Dataflash_ReceiveByte() & DF_STATUS_SECTORPROTECTION_ON)
	{
		Dataflash_ToggleSelectedChipCS();

		/* Send the commands to disable sector protection */
		Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[0]);
		Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[1]);
		Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[2]);
		Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[3]);
	}

	/* Select second Dataflash chip (if present on selected board), send read status register command */
	#if (DATAFLASH_TOTALCHIPS == 2)
	Dataflash_SelectChip(DATAFLASH_CHIP2);
	Dataflash_SendByte(DF_CMD_GETSTATUS);

	/* Check if sector protection is enabled */
	if (Dataflash_ReceiveByte() & DF_STATUS_SECTORPROTECTION_ON)
	{
		Dataflash_ToggleSelectedChipCS();

		/* Send the commands to disable sector protection */
		Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[0]);
		Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[1]);
		Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[2]);
		Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[3]);
	}
	#endif

	/* Deselect current Dataflash chip */
	Dataflash_DeselectChip();
}

/** Performs a simple test on the attached Dataflash IC(s) to ensure that they are working.
 *
 *  \return Boolean \c true if all media chips are working, \c false otherwise
 */
bool DataflashManager_CheckDataflashOperation(void)
{
	uint8_t ReturnByte;

	/* Test first Dataflash IC is present and responding to commands */
	Dataflash_SelectChip(DATAFLASH_CHIP1);
	Dataflash_SendByte(DF_CMD_READMANUFACTURERDEVICEINFO);
	ReturnByte = Dataflash_ReceiveByte();
	Dataflash_DeselectChip();

	/* If returned data is invalid, fail the command */
	if (ReturnByte != DF_MANUFACTURER_ATMEL)
	  return false;

	#if (DATAFLASH_TOTALCHIPS == 2)
	/* Test second Dataflash IC is present and responding to commands */
	Dataflash_SelectChip(DATAFLASH_CHIP2);
	Dataflash_SendByte(DF_CMD_READMANUFACTURERDEVICEINFO);
	ReturnByte = Dataflash_ReceiveByte();
	Dataflash_DeselectChip();

	/* If returned data is invalid, fail the command */
	if (ReturnByte != DF_MANUFACTURER_ATMEL)
	  return false;
	#endif

	return true;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-28 22:10:37 +0000