{"id":189,"date":"2024-04-10T21:31:10","date_gmt":"2024-04-10T13:31:10","guid":{"rendered":"https:\/\/wp.ytdx.cc\/?p=189"},"modified":"2024-04-10T21:31:10","modified_gmt":"2024-04-10T13:31:10","slug":"stm32%e4%b9%8bflash%e9%a9%b1%e5%8a%a8","status":"publish","type":"post","link":"https:\/\/wp.ytdx.cc\/index.php\/2024\/04\/10\/stm32%e4%b9%8bflash%e9%a9%b1%e5%8a%a8\/","title":{"rendered":"STM32\u4e4bFLASH\u9a71\u52a8"},"content":{"rendered":"\n

<\/h1>\n\n\n\n

\u672c\u6587\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528STM32\u6807\u51c6\u5916\u8bbe\u5e93\u9a71\u52a8FLASH\uff0c\u672c\u4f8b\u7a0b\u9a71\u52a8\u7684FLASH\u4e3aW25Q64\u3002<\/p>\n\n\n\n

\u672c\u6587\u9002\u5408\u5bf9\u5355\u7247\u673a\u53ca\uff23\u8bed\u8a00\u6709\u4e00\u5b9a\u57fa\u7840\u7684\u5f00\u53d1\u4eba\u5458\u9605\u8bfb\uff0cMCU\u4f7f\u7528STM32F103VE\u7cfb\u5217\u3002<\/p>\n\n\n\n

1. FLASH\u7b80\u4ecb<\/h3>\n\n\n\n

FLASH\u5b58\u50a8\u5668\u53c8\u79f0\u4e3a\u95ea\u5b58\uff0c\u4e3a\u53ef\u91cd\u590d\u64e6\u5199\u7684\u5b58\u50a8\u5668\uff0c\u5bb9\u91cf\u6bd4EEPROM\u5927\u7684\u591a\u3002<\/p>\n\n\n\n

FLASH\u5728\u5199\u5165\u6570\u636e\u65f6\u53ea\u80fd\u628a1\u6539\u62100\uff0c\u800c0\u65e0\u6cd5\u76f4\u63a5\u6539\u62101\uff0c\u56e0\u6b64\u8981\u5199\u5165\u6570\u636e\u65f6\uff0c\u5fc5\u987b\u5148\u6267\u884c\u64e6\u9664\u64cd\u4f5c\uff0c\u800c\u4e00\u6b21\u64e6\u9664\u64cd\u4f5c\u65e0\u6cd5\u4ec5\u64e6\u9664\u4e00\u4e2a\u5b57\u8282\uff0c\u5fc5\u987b\u5c06\u4e00\u6574\u5757\u533a\u57df\u7684\u6570\u636e\u5168\u90e8\u6539\u62101\u3002\u56e0\u6b64FLASH\u64cd\u4f5c\u7684\u7279\u6027\u662f\u64e6\u9664\u65f6\u5fc5\u987b\u4e00\u6b21\u64e6\u9664\u4e00\u6574\u5757\u533a\u57df\uff1b\u5199\u5165\u65f6\u53ef\u4ee5\u6309\u5b57\u8282\u6216\u6309\u5757\u5199\u5165\uff1b\u8bfb\u53d6\u5219\u4e0d\u53d7\u9650\u5236\uff0c\u53ef\u4ee5\u8bfb\u53d6\u4e00\u4e2a\u5b57\u8282\u548c\u4efb\u610f\u591a\u4e2a\u5b57\u8282\u3002<\/p>\n\n\n\n

FLASH\u53ef\u5206\u4e3aNOR FLASH\u548cNAND FLASH\uff0c\u4e24\u8005\u7279\u6027\u6709\u6240\u533a\u522b\uff0cNOR FLASH\u8bfb\u53d6\u901f\u5ea6\u5feb\u3001\u53ef\u4ee5\u6309\u5b57\u8282\u8bfb\u5199\uff0c\u4f46\u5bb9\u91cf\u76f8\u540c\u7684\u60c5\u51b5\u4e0b\u4ef7\u683c\u8f83\u9ad8\uff0c\u800cNAND FLASH\u8bfb\u53d6\u901f\u5ea6\u8f83\u6162\uff0c\u53ea\u80fd\u6309\u5757\u4e3a\u5355\u4f4d\u8bfb\u5199\uff0c\u4f46\u5bb9\u91cf\u76f8\u540c\u7684\u60c5\u51b5\u4e0b\u4ef7\u683c\u8f83\u4f4e\u3002\u4e00\u822cNOR FLASH\u9002\u7528\u4e8e\u5b58\u50a8\u7a0b\u5e8f\u4ee3\u7801\uff0cNAND FLASH\u9002\u7528\u4e8e\u5b58\u50a8\u5927\u6570\u636e\u91cf\u5b58\u50a8\u3002<\/p>\n\n\n\n

2. \u5e38\u7528FLASH<\/h3>\n\n\n\n

\u4e00\u822c\u5e38\u7528\u7684NOR FLASH\u4e3aWinbond\u516c\u53f8\u7684W25Qxx\u7cfb\u5217\uff0c\u5e38\u7528\u5bb9\u91cf\u4ece16M\u5230256Mbit\u4e0d\u7b49\uff0c\u6362\u7b97\u6210\u5b57\u8282\u4e3a2M\u523032MBytes\uff0c\u53ef\u4ee5\u6839\u636e\u9879\u76ee\u9700\u6c42\u548c\u4ef7\u683c\u7efc\u5408\u8003\u8651\u9009\u578b\u3002<\/p>\n\n\n\n

3.FLASH\u64cd\u4f5c\u8bf4\u660e<\/h3>\n\n\n\n

\u4ee5W25Q64\u4e3e\u4f8b\uff0cW25Q64\u5bb9\u91cf\u4e3a64Mbit\uff0c\u53738MByte\uff0c\u5730\u5740\u8303\u56f40~0x800000\uff0c3\u4e2a\u5b57\u8282\u5373\u53ef\u8868\u793a\uff0c\u56e0\u6b64\u5730\u5740\u957f\u5ea6\u4e3a3\u5b57\u8282\u3002<\/p>\n\n\n\n

W25Q64\u5171\u5206\u4e3a128\u4e2aBlock\uff0c\u6bcf\u4e2aBlock\u4e3a64Kbytes\uff0c\u6bcf\u4e2aBlock\u53c8\u5206\u4e3a16\u4e2aSector\uff0c\u6bcf\u4e2aSector\u4e3a4Kbytes\uff0c\u6bcf\u4e2aSector\u53c8\u53ef\u5206\u4e3a16\u4e2aPages\uff0c\u6bcf\u4e2aPage\u6709256\u4e2a\u5b57\u8282\uff0c\u6bcf\u6b21\u64e6\u9664\u65f6\u81f3\u5c11\u9700\u8981\u64e6\u9664\u4e00\u6574\u4e2aSector\uff0c\u5199\u5165\u65f6\u5219\u53ef\u4ee5\u5355\u5b57\u8282\u5199\u5165\uff0c\u4e5f\u53ef\u4ee5\u5199\u5165\u591a\u4e2a\u5b57\u8282\uff0c\u4f46\u6700\u591a\u5199\u5165\u4e00\u4e2aPage\uff0c\u5373256\u4e2a\u5b57\u8282\u3002<\/p>\n\n\n\n

3.1. \u8bbe\u5907ID<\/h4>\n\n\n\n

W25Q64\u5382\u5546\u53f7\u4e3a0xEF\uff0cFLASH\u578b\u53f7\u4e3a0x4017\uff0c\u53ef\u4ee5\u8bfb\u53d6\u8fd9\u4e9b\u4fe1\u606f\u5224\u5b9aFLASH\u662f\u5426\u6b63\u5e38\u3002<\/p>\n\n\n\n

3.2. \u6307\u4ee4<\/h4>\n\n\n\n
\"\"\/<\/figure>\n\n\n\n

\u8be5\u8868\u4e2d\u7684\u7b2c\u4e00\u5217\u4e3a\u6307\u4ee4\u540d\uff0c\u7b2c\u4e8c\u5217\u4e3a\u6307\u4ee4\u7f16\u7801\uff0c\u7b2c\u4e09\u81f3\u7b2c N \u5217\u7684\u5177\u4f53\u5185\u5bb9\u6839\u636e\u6307\u4ee4\u7684\u4e0d\u540c\u800c\u6709\u4e0d\u540c\u7684\u542b\u4e49\u3002\u5176\u4e2d\u5e26\u62ec\u53f7\u7684\u5b57\u8282\u53c2\u6570\uff0c\u65b9\u5411\u4e3a FLASH \u5411\u4e3b\u673a\u4f20\u8f93\uff0c\u5373\u547d\u4ee4\u54cd\u5e94\uff0c\u4e0d\u5e26\u62ec\u53f7\u7684\u5219\u4e3a\u4e3b\u673a\u5411 FLASH \u4f20\u8f93\u3002\u8868\u4e2d\u201cA0~A23\u201d\u6307 FLASH \u82af\u7247\u5185\u90e8\u5b58\u50a8\u5668\u7ec4\u7ec7\u7684\u5730\u5740\uff1b\u201cM0~M7\u201d\u4e3a\u5382\u5546\u53f7\uff08MANUFACTURER ID\uff09\uff1b\u201cID0-ID15\u201d\u4e3a FLASH \u82af\u7247\u7684ID\uff1b\u201cdummy\u201d\u6307\u8be5\u5904\u53ef\u4e3a\u4efb\u610f\u6570\u636e\uff1b\u201cD0~D7\u201d\u4e3a FLASH \u5185\u90e8\u5b58\u50a8\u77e9\u9635\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n

3.3. \u8bfb\u53d6<\/h4>\n\n\n\n

\u4f7f\u7528\u8bfb\u53d6\u547d\u4ee4\uff08\u6307\u4ee4\u7f16\u7801\u4e3a03h\uff09\uff0c\u53d1\u9001\u4e86\u6307\u4ee4\u7f16\u7801\u53ca\u8981\u8bfb\u7684\u8d77\u59cb\u5730\u5740\u540e\uff0cFLASH \u82af\u7247\u5c31\u4f1a\u6309\u5730\u5740\u9012\u589e\u7684\u65b9\u5f0f\u8fd4\u56de\u5185\u90e8\u5b58\u50a8\u7684\u6570\u636e\uff0c\u8bfb\u53d6\u7684\u6570\u636e\u91cf\u6ca1\u6709\u9650\u5236\uff0c\u53ea\u8981\u6ca1\u6709\u505c\u6b62\u901a\u8baf\uff0cFLASH \u82af\u7247\u5c31\u4f1a\u4e00\u76f4\u8fd4\u56de\u6570\u636e\u3002<\/p>\n\n\n\n

3.4. \u5199\u4f7f\u80fd\u3001\u5199\u7981\u7528\u548c\u72b6\u6001\u8bfb\u53d6<\/h4>\n\n\n\n

\u5728\u5411 FLASH \u5199\u5165\u6570\u636e\u6216\u8005\u64e6\u9664\u524d\uff0c\u9996\u5148\u8981\u4f7f\u80fd\u5199\u64cd\u4f5c\uff0c\u901a\u8fc7\u53d1\u9001\u201cWrite Enable\u201d\u547d\u4ee4\u4f7fFLASH\u53ef\u5199\uff0c\u5199\u5165\u6216\u8005\u64e6\u9664\u5b8c\u6bd5\u4e4b\u540e\uff0cFLASH\u81ea\u52a8\u8fdb\u5165\u5199\u7981\u7528\u72b6\u6001\uff0c\u65e0\u9700\u5355\u72ec\u53d1\u9001\u5199\u7981\u7528\u547d\u4ee4\uff0c\u5f53FLASH\u4e3a\u5199\u7981\u7528\u72b6\u6001\u65f6\uff0c\u4efb\u4f55\u5199\u5165\u6216\u64e6\u9664\u64cd\u4f5c\u65e0\u6548\uff0c\u8fd9\u6837\u53ef\u907f\u514d\u8bef\u5199\u5165\u6216\u8bef\u64e6\u9664\u3002<\/p>\n\n\n\n

\u7531\u4e8eFLASH\u5199\u5165\u6570\u636e\u9700\u8981\u6d88\u8017\u4e00\u5b9a\u7684\u65f6\u95f4\uff0c\u5e76\u4e0d\u662f\u5728\u603b\u7ebf\u901a\u8baf\u7ed3\u675f\u7684\u4e00\u77ac\u95f4\u5b8c\u6210\u7684\uff0c\u6240\u4ee5\u5728\u5199\u64cd\u4f5c\u540e\u9700\u8981\u786e\u8ba4 FLASH \u82af\u7247\u201c\u7a7a\u95f2\u201d\u65f6\u624d\u80fd\u8fdb\u884c\u518d\u6b21\u5199\u5165\u3002\u4e3a\u4e86\u8868\u793a\u81ea\u5df1\u7684\u5de5\u4f5c\u72b6\u6001\uff0cFLASH \u82af\u7247\u5b9a\u4e49\u4e86\u4e00\u4e2a\u72b6\u6001\u5bc4\u5b58\u5668\uff0c\u8fd9\u4e2a\u72b6\u6001\u5bc4\u5b58\u5668\u7684\u7b2c 0 \u4f4d\u4e3a\u201cBUSY\u201d\uff0c\u5f53\u8fd9\u4e2a\u4f4d\u4e3a\u201c1\u201d\u65f6\uff0c\u8868\u660e FLASH\u82af\u7247\u5904\u4e8e\u5fd9\u788c\u72b6\u6001\uff0c\u5b83\u53ef\u80fd\u6b63\u5728\u8fdb\u884c\u201c\u64e6\u9664\u201d\u6216\u201c\u6570\u636e\u5199\u5165\u201d\u7684\u64cd\u4f5c\u3002\u5229\u7528\u6307\u4ee4\u8868\u4e2d\u7684\u201cRead Status Register\u201d\u6307\u4ee4\u53ef\u4ee5\u83b7\u53d6 FLASH \u72b6\u6001\u5bc4\u5b58\u5668\u7684\u5185\u5bb9\uff0c\u53ea\u8981\u5411 FLASH \u82af\u7247\u53d1\u9001\u4e86\u8bfb\u72b6\u6001\u5bc4\u5b58\u5668\u7684\u6307\u4ee4\uff0cFLASH \u82af\u7247\u5c31\u4f1a\u6301\u7eed\u5411\u4e3b\u673a\u8fd4\u56de\u6700\u65b0\u7684\u72b6\u6001\u5bc4\u5b58\u5668\u5185\u5bb9\uff0c\u76f4\u5230\u6536\u5230 SPI\u901a\u8baf\u7684\u505c\u6b62\u4fe1\u53f7\u3002\u56e0\u6b64\u53ef\u4ee5\u901a\u8fc7\u67e5\u770b\u8be5\u4f4d\uff0c\u76f4\u5230\u8be5\u4f4d\u4e3a0\u65f6\uff0c\u5373\u53ef\u5bf9FLASH\u8fdb\u884c\u64e6\u9664\u6216\u8005\u5199\u64cd\u4f5c\u3002\u5982\u679c\u521a\u5199\u5b8c\u6570\u636e\u5c31\u6267\u884c\u8bfb\u64cd\u4f5c\uff0c\u4e5f\u9700\u8981\u7b49\u5f85\u3002<\/p>\n\n\n\n

3.5. \u64e6\u9664<\/h4>\n\n\n\n

FLASH\u5199\u5165\u6570\u636e\u4e4b\u524d\u9700\u8981\u5148\u64e6\u9664\uff0c\u64e6\u9664\u53ef\u5206\u4e3a\u6247\u533a\u64e6\u9664\uff08Sector Erase\uff09\u3001\u5757\u64e6\u9664\uff08Block Erase\uff09\u548c\u6574\u7247\u64e6\u9664\uff08Chip Erase\uff09\u3002\u6307\u4ee4\u7f16\u7801\u5206\u522b\u4e3a20h\u3001D8h\uff0c\u800c\u6574\u7247\u64e6\u9664\u652f\u63012\u4e2a\u547d\u4ee4\uff0c\u53732\u4e2a\u547d\u4ee4\u5747\u53ef\u4f7f\u7528\uff0c\u4e3aC7h\u548c60h\u3002\u8981\u5b9e\u73b0\u64e6\u9664\u64cd\u4f5c\u65f6\u5148\u53d1\u9001\u6307\u4ee4\u7f16\u7801\uff0c\u6247\u533a\u64e6\u9664\u548c\u5757\u64e6\u9664\u9700\u8981\u7ee7\u7eed\u53d1\u9001\u8981\u64e6\u9664\u533a\u57df\u7684\u5730\u5740\uff0c\u800c\u6574\u7247\u64e6\u9664\u65e0\u9700\u53d1\u9001\u5730\u5740\u3002\u8981\u6267\u884c\u64e6\u9664\u64cd\u4f5c\u4e4b\u524d\u9700\u8981\u786e\u4fddFLASH\u5904\u4e8e\u5199\u4f7f\u80fd\u72b6\u6001\uff0c\u53ef\u901a\u8fc7\u53d1\u9001\u5199\u4f7f\u80fd\u547d\u4ee4\u5b9e\u73b0\u3002<\/p>\n\n\n\n

3.6. \u5199\u5165<\/h4>\n\n\n\n

\u4f7f\u7528\u9875\u5199\u5165\u547d\u4ee4\uff08\u6307\u4ee4\u7f16\u7801\u4e3a02h\uff09\uff0c\u5148\u53d1\u9001\u6307\u4ee4\u7f16\u7801\uff0c\u7136\u540e\u53d1\u9001\u8981\u5199\u7684\u8d77\u59cb\u5730\u5740\uff0c\u7136\u540e\u7ee7\u7eed\u53d1\u9001\u8981\u5199\u5165\u7684\u5185\u5bb9\uff0c\u4e00\u6b21\u5199\u5165\u64cd\u4f5c\u6700\u591a\u5199\u5165256\u5b57\u8282\u6570\u636e\u3002 \u8fdb\u884c\u5199\u5165\u4e4b\u524d\u9700\u8981\u786e\u4fddFLASH\u5904\u4e8e\u5199\u4f7f\u80fd\u72b6\u6001\uff0c\u53ef\u901a\u8fc7\u53d1\u9001\u5199\u4f7f\u80fd\u547d\u4ee4\u5b9e\u73b0\u3002\u5982\u679c\u60f3\u8981\u4e00\u6b21\u5199\u5165\u8d85\u8fc7256\u5b57\u8282\uff0c\u90a3\u4e48\u5c31\u9700\u8981\u5bf9\u9875\u5199\u5165\u547d\u4ee4\u8fdb\u884c\u5c01\u88c5\u3002<\/p>\n\n\n\n

 <\/h3>\n\n\n\n

\u5b8c\u6574\u4ee3\u7801\uff08\u4ec5\u81ea\u5df1\u7f16\u5199\u7684\u90e8\u5206\uff09<\/h3>\n\n\n\n
\"\u590d\u5236\u4ee3\u7801\"\/<\/a><\/figure>\n\n\n\n
  1 #include \"flash.h\" 
  2 #include \"delay.h\"
  3 #include <stdio.h>
  4 
  5 #define FLASH_PAGE_SIZE    256        \/\/W25Q64\u6bcf\u9875256\u4e2a\u5b57\u8282
  6 
  7 #define W25X_WriteEnable            0x06 
  8 #define W25X_WriteDisable            0x04 
  9 #define W25X_ReadStatusReg            0x05 
 10 #define W25X_WriteStatusReg            0x01 
 11 #define W25X_ReadData                0x03 
 12 #define W25X_FastReadData            0x0B 
 13 #define W25X_FastReadDual            0x3B 
 14 #define W25X_PageProgram            0x02 
 15 #define W25X_BlockErase                0xD8 
 16 #define W25X_SectorErase            0x20 
 17 #define W25X_ChipErase                0xC7 
 18 #define W25X_PowerDown                0xB9 
 19 #define W25X_ReleasePowerDown        0xAB 
 20 #define W25X_DeviceID                0xAB 
 21 #define W25X_ManufactDeviceID        0x90 
 22 #define W25X_JedecDeviceID            0x9F
 23 
 24 \/* WIP(busy)\u6807\u5fd7\uff0cFLASH\u5185\u90e8\u6b63\u5728\u5199\u5165 *\/
 25 #define WIP_Flag                  0x01
 26 
 27 \/\/\u521d\u59cb\u5316FLASH\u63a5\u53e3
 28 void FLASH_Init(void)
 29 {
 30     SPI_IoInit();
 31 }
 32 
 33 \/\/\u67e5\u770bW25Q64\u662f\u5426\u7a7a\u95f2
 34 \/\/\u8fd4\u56de\u503c:    1\uff0cFLASH\u5fd9\uff0c\u65e0\u6cd5\u8bfb\u5199
 35 \/\/            0\uff0cFLASH\u7a7a\u95f2\uff0c\u53ef\u4ee5\u8bfb\u5199
 36 \/\/\u6ce8\u610f\u6267\u884c\u5b8c\u6b64\u51fd\u6570\u540e\uff0cFLASH\u5df2\u53d6\u6d88\u9009\u4e2d\uff0c\u5982\u679c\u8981\u5199\u5165\uff0c\u5fc5\u987b\u91cd\u65b0\u9009\u4e2d
 37 uint8_t FLASH_WaitReady(void)
 38 {                  
 39     uint32_t i = 0;
 40     uint8_t ret = 1;
 41     uint8_t status = 0;
 42 
 43     SPI_CS_0;
 44 
 45     SPI_WriteByte(W25X_ReadStatusReg);
 46 
 47     for(i = 0; i < 1000; i++){
 48         status = SPI_ReadByte();     
 49         if((status & WIP_Flag) == RESET){
 50             ret = 0;
 51             break;
 52         }
 53         delay_ms(10);
 54     }
 55 
 56     SPI_CS_1;
 57     
 58     return ret;
 59 }
 60 
 61 \/*
 62     FLASH\u64e6\u9664\u3001\u5199\u5165\u6570\u636e\u5b8c\u6bd5\u540e\u4f1a\u81ea\u52a8\u7981\u7528\u5199\u4f7f\u80fd\uff0c\u56e0\u6b64\u65e0\u9700\u518d\u6267\u884c\u5199\u7981\u7528\u64cd\u4f5c
 63     \u6ce8\u610f\u6267\u884c\u6b64\u51fd\u6570\u524d\uff0c\u5fc5\u987b\u5148\u9009\u4e2dFLASH
 64 *\/
 65 void FLASH_WriteEnable(void)
 66 {
 67     \/* \u53d1\u9001\u5199\u4f7f\u80fd\u547d\u4ee4*\/
 68     SPI_WriteByte(W25X_WriteEnable);
 69 }
 70 
 71 uint32_t FLASH_ReadJedecID(void)
 72 {
 73     uint32_t temp, temp0, temp1, temp2;
 74     
 75     SPI_CS_0;
 76     
 77     \/* \u53d1\u9001JEDEC\u6307\u4ee4\uff0c\u8bfb\u53d6ID *\/
 78     SPI_WriteByte(W25X_JedecDeviceID);
 79 
 80     temp0 = SPI_ReadByte();
 81     temp1 = SPI_ReadByte();
 82     temp2 = SPI_ReadByte();
 83 
 84     \/*\u628a\u6570\u636e\u7ec4\u5408\u8d77\u6765\uff0c\u4f5c\u4e3a\u51fd\u6570\u7684\u8fd4\u56de\u503c*\/
 85     temp = (temp0 << 16) | (temp1 << 8) | temp2;
 86 
 87     SPI_CS_1;
 88 
 89     return temp;
 90 }
 91 
 92 uint8_t FLASH_SectorErase(uint32_t addr)
 93 {
 94     \/* \u5224\u65adFLASH\u662f\u5426\u53ef\u5199\uff0c\u5982\u679c\u4e0d\u53ef\u5199\uff0c\u76f4\u63a5\u8fd4\u56de\u9519\u8bef *\/
 95     if(FLASH_WaitReady()){
 96         return 1;
 97     }
 98     
 99     SPI_CS_0;
100     
101     \/* \u53d1\u9001FLASH\u5199\u4f7f\u80fd\u547d\u4ee4 *\/
102     FLASH_WriteEnable();
103 
104     \/* \u53d1\u9001\u6247\u533a\u64e6\u9664\u6307\u4ee4*\/
105     SPI_WriteByte(W25X_SectorErase);
106     \/*\u53d1\u9001\u64e6\u9664\u6247\u533a\u5730\u5740\u7684\u9ad8\u4f4d*\/
107     SPI_WriteByte((addr & 0xFF0000) >> 16);
108     \/* \u53d1\u9001\u64e6\u9664\u6247\u533a\u5730\u5740\u7684\u4e2d\u4f4d *\/
109     SPI_WriteByte((addr & 0xFF00) >> 8);
110     \/* \u53d1\u9001\u64e6\u9664\u6247\u533a\u5730\u5740\u7684\u4f4e\u4f4d *\/
111     SPI_WriteByte(addr & 0xFF);
112     \/* \u53d1\u9001FLASH\u5199\u7981\u7528\u547d\u4ee4 *\/
113 \/\/    FLASH_WriteDisable();
114     
115     SPI_CS_1;
116     
117     if(FLASH_WaitReady()){
118         return 2;
119     }
120 
121     return 0;
122 }
123 
124 uint8_t FLASH_ChipErase(void)
125 {
126     \/* \u5224\u65adFLASH\u662f\u5426\u53ef\u5199\uff0c\u5982\u679c\u4e0d\u53ef\u5199\uff0c\u76f4\u63a5\u8fd4\u56de\u9519\u8bef *\/
127     if(FLASH_WaitReady()){
128         return 1;
129     }
130 
131     SPI_CS_0;
132 
133     \/* \u53d1\u9001FLASH\u5199\u4f7f\u80fd\u547d\u4ee4 *\/
134     FLASH_WriteEnable();
135 
136     \/* \u53d1\u9001\u6247\u533a\u64e6\u9664\u6307\u4ee4*\/
137     SPI_WriteByte(W25X_ChipErase);
138     
139     SPI_CS_1;
140 
141     if(FLASH_WaitReady()){
142         return 2;
143     }
144 
145     return 0;
146 }
147 
148 \/\/\u5728W25Q64\u91cc\u9762\u7684\u6307\u5b9a\u5730\u5740\u5f00\u59cb\u8bfb\u51fa\u6307\u5b9a\u4e2a\u6570\u7684\u6570\u636e
149 \/\/addr:        \u5f00\u59cb\u8bfb\u6570\u7684\u5730\u5740  
150 \/\/pBuffer:  \u9700\u8981\u8bfb\u53d6\u6570\u636e\u7684\u6307\u9488
151 \/\/numToRead:\u8981\u8bfb\u51fa\u6570\u636e\u7684\u4e2a\u6570
152 \/\/\u8fd4\u56de\u503c:    1\uff0c\u8bfb\u53d6\u5931\u8d25
153 \/\/            0\uff0c\u8bfb\u53d6\u6210\u529f
154 uint8_t FLASH_Read(uint32_t addr, uint8_t *pBuffer, uint32_t numToRead)
155 {
156     SPI_CS_0;
157 
158     SPI_WriteByte(W25X_ReadData);
159     
160     \/* \u53d1\u9001 \u8bfb \u5730\u5740\u9ad8\u4f4d *\/
161     SPI_WriteByte((addr & 0xFF0000) >> 16);
162     \/* \u53d1\u9001 \u8bfb \u5730\u5740\u4e2d\u4f4d *\/
163     SPI_WriteByte((addr & 0xFF00) >> 8);
164     \/* \u53d1\u9001 \u8bfb \u5730\u5740\u4f4e\u4f4d *\/
165     SPI_WriteByte(addr & 0xFF);
166     
167     \/* \u8bfb\u53d6\u6570\u636e *\/
168     while (numToRead--) \/* while there is data to be read *\/
169     {
170         \/* \u8bfb\u53d6\u4e00\u4e2a\u5b57\u8282*\/
171         *pBuffer++ = SPI_ReadByte();
172     }
173 
174     SPI_CS_1;
175     
176     return 0;
177 }  
178 
179 \/\/\u5728W25Q64\u6307\u5b9a\u5730\u5740\u8bfb\u51fa\u4e00\u4e2a\u6570\u636e
180 \/\/addr:        \u5f00\u59cb\u8bfb\u6570\u7684\u5730\u5740  
181 \/\/pReadData:\u9700\u8981\u8bfb\u53d6\u6570\u636e\u7684\u6307\u9488
182 \/\/\u8fd4\u56de\u503c:    1\uff0c\u8bfb\u53d6\u5931\u8d25
183 \/\/            0\uff0c\u8bfb\u53d6\u6210\u529f
184 uint8_t FLASH_ByteRead(uint32_t addr, uint8_t * pReadData)
185 {                  
186     SPI_CS_0;
187 
188     SPI_WriteByte(W25X_ReadData);
189 
190     \/* \u53d1\u9001 \u8bfb \u5730\u5740\u9ad8\u4f4d *\/
191     SPI_WriteByte((addr & 0xFF0000) >> 16);
192     \/* \u53d1\u9001 \u8bfb \u5730\u5740\u4e2d\u4f4d *\/
193     SPI_WriteByte((addr & 0xFF00) >> 8);
194     \/* \u53d1\u9001 \u8bfb \u5730\u5740\u4f4e\u4f4d *\/
195     SPI_WriteByte(addr & 0xFF);
196     
197     \/* \u8bfb\u53d6\u4e00\u4e2a\u5b57\u8282*\/
198     *pReadData = SPI_ReadByte();
199 
200     SPI_CS_1;
201 
202     return 0;
203 }
204 
205 \/\/\u5728W25Q64\u6307\u5b9a\u5730\u5740\u5199\u5165\u4e00\u4e2a\u6570\u636e
206 \/\/addr:            \u5199\u5165\u6570\u636e\u7684\u76ee\u7684\u5730\u5740    
207 \/\/dataToWrite:    \u8981\u5199\u5165\u7684\u6570\u636e
208 \/\/\u8fd4\u56de\u503c:    1\uff0c\u5199\u5165\u5931\u8d25
209 \/\/            0\uff0c\u5199\u5165\u6210\u529f
210 uint8_t FLASH_ByteWrite(uint32_t addr, uint8_t dataToWrite)
211 {    
212     \/* \u5224\u65adFLASH\u662f\u5426\u53ef\u5199\uff0c\u5982\u679c\u4e0d\u53ef\u5199\uff0c\u76f4\u63a5\u8fd4\u56de\u9519\u8bef *\/
213     if(FLASH_WaitReady()){
214         return 1;
215     }
216 
217     SPI_CS_0;
218     
219     \/* \u53d1\u9001FLASH\u5199\u4f7f\u80fd\u547d\u4ee4 *\/
220     FLASH_WriteEnable();
221 
222     \/* \u5199\u9875\u5199\u6307\u4ee4*\/
223     SPI_WriteByte(W25X_PageProgram);
224     \/*\u53d1\u9001\u5199\u5730\u5740\u7684\u9ad8\u4f4d*\/
225     SPI_WriteByte((addr & 0xFF0000) >> 16);
226     \/*\u53d1\u9001\u5199\u5730\u5740\u7684\u4e2d\u4f4d*\/
227     SPI_WriteByte((addr & 0xFF00) >> 8);
228     \/*\u53d1\u9001\u5199\u5730\u5740\u7684\u4f4e\u4f4d*\/
229     SPI_WriteByte(addr & 0xFF);
230 
231     \/* \u53d1\u9001\u5f53\u524d\u8981\u5199\u5165\u7684\u5b57\u8282\u6570\u636e *\/
232     SPI_WriteByte(dataToWrite);
233 
234     SPI_CS_1;
235 
236     if(FLASH_WaitReady()){
237         return 2;
238     }
239 
240     return 0;
241 }
242 
243 uint8_t FLASH_PageWrite(uint32_t addr, uint8_t *pBuffer, uint32_t numToWrite)
244 {
245     \/* \u5224\u65adFLASH\u662f\u5426\u53ef\u5199\uff0c\u5982\u679c\u4e0d\u53ef\u5199\uff0c\u76f4\u63a5\u8fd4\u56de\u9519\u8bef *\/
246     if(FLASH_WaitReady()){
247         return 1;
248     }
249 
250     SPI_CS_0;
251     
252     \/* \u53d1\u9001FLASH\u5199\u4f7f\u80fd\u547d\u4ee4 *\/
253     FLASH_WriteEnable();
254     
255     \/* \u5199\u9875\u5199\u6307\u4ee4*\/
256     SPI_WriteByte(W25X_PageProgram);
257     \/*\u53d1\u9001\u5199\u5730\u5740\u7684\u9ad8\u4f4d*\/
258     SPI_WriteByte((addr & 0xFF0000) >> 16);
259     \/*\u53d1\u9001\u5199\u5730\u5740\u7684\u4e2d\u4f4d*\/
260     SPI_WriteByte((addr & 0xFF00) >> 8);
261     \/*\u53d1\u9001\u5199\u5730\u5740\u7684\u4f4e\u4f4d*\/
262     SPI_WriteByte(addr & 0xFF);
263 
264     \/* \u5199\u5165\u6570\u636e*\/
265     while(numToWrite--)
266     {
267         \/* \u53d1\u9001\u5f53\u524d\u8981\u5199\u5165\u7684\u5b57\u8282\u6570\u636e *\/
268         SPI_WriteByte(*pBuffer++);
269     }
270 
271     SPI_CS_1;
272     
273     if(FLASH_WaitReady()){
274         return 2;
275     }
276 
277     return 0;
278 }
279 
280 \/*
281     \u6839\u636e\u8981\u5199\u5165\u7684\u5730\u5740\u3001\u957f\u5ea6\u3001\u9875\u5927\u5c0f\u8ba1\u7b97\u5982\u4f55\u5206\u9875
282     \u8f93\u5165\u53c2\u6570\uff1aaddr\uff1a    \u5199\u5165\u8d77\u59cb\u5730\u5740
283               len\uff1a        \u5199\u5165\u6570\u636e\u957f\u5ea6
284               pageSize\uff1a\u6bcf\u9875\u5b58\u50a8\u7684\u6570\u636e\uff0c\u5bf9\u4e8eW25Q64\u6765\u8bf4\uff0c\u8be5\u503c\u4e3a256
285     \u8981\u5199\u5165\u53c2\u6570\uff1apFirstPageLen\uff1a    \u9996\u9875\u8981\u5199\u5165\u7684\u5b57\u8282
286                 pLastPageLen\uff1a    \u5c3e\u9875\u8981\u5199\u5165\u7684\u5b57\u8282
287                 pPageNum\uff1a        \u603b\u5171\u8981\u5199\u5165\u7684\u9875\u6570
288 *\/
289 void FLASH_GetWritePages(uint32_t addr, uint32_t len, uint32_t pageSize, 
290     uint32_t * pFirstPageLen, uint32_t * pLastPageLen, uint32_t * pPageNum)
291 {
292     uint32_t firstPageOffset;    \/\/\u9996\u9875\u504f\u79fb
293     uint32_t otherLen;            \/\/\u53bb\u9664\u9996\u9875\u4e4b\u540e\u5269\u4f59\u957f\u5ea6
294     uint32_t otherPageNum;        \/\/\u53bb\u9664\u9996\u9875\u4e4b\u540e\u5269\u4f59\u6574\u6570\u9875\u6570\u91cf
295     
296     firstPageOffset = addr % pageSize;
297     *pFirstPageLen = pageSize - firstPageOffset;
298     
299     if(len < *pFirstPageLen){
300         *pFirstPageLen = len;
301     }
302     
303     otherLen = len - *pFirstPageLen;
304     otherPageNum = otherLen \/ pageSize;
305     *pLastPageLen = otherLen % pageSize;
306     
307     *pPageNum = otherPageNum + 1;
308     
309     if(*pLastPageLen){
310         (*pPageNum)++;
311     }
312 }
313 
314 
315 \/\/\u5728W25Q64\u91cc\u9762\u7684\u6307\u5b9a\u5730\u5740\u5f00\u59cb\u5199\u5165\u6307\u5b9a\u4e2a\u6570\u7684\u6570\u636e
316 \/\/addr:        \u5f00\u59cb\u8bfb\u6570\u7684\u5730\u5740  
317 \/\/pBuffer:  \u9700\u8981\u8bfb\u53d6\u6570\u636e\u7684\u6307\u9488
318 \/\/NumToWrite:\u8981\u5199\u5165\u6570\u636e\u7684\u4e2a\u6570
319 \/\/\u8fd4\u56de\u503c:    1\uff0c\u8bfb\u53d6\u5931\u8d25
320 \/\/            0\uff0c\u8bfb\u53d6\u6210\u529f
321 uint8_t FLASH_Write(uint32_t addr, uint8_t *pBuffer, uint32_t numToWrite)
322 {
323     uint32_t i;
324     uint32_t firstPageLen, lastPageLen, pageNum;
325     
326     FLASH_GetWritePages(addr, numToWrite, FLASH_PAGE_SIZE,
327         &firstPageLen, &lastPageLen, &pageNum);
328 
329     printf(\"addr:%#x, numToWrite:%d, firstPageLen:%d, lastPageLen:%d, pageNum:%d\\n\", 
330         addr, numToWrite, firstPageLen, lastPageLen, pageNum);
331 
332     for(i = 0; i < pageNum; i++)
333     {
334         if(i == 0){                        \/\/\u9996\u9875\u5199\u5165\u957f\u5ea6\u4e3afirstPageLen
335             if(FLASH_PageWrite(addr, pBuffer, firstPageLen)){
336                 goto write_fail;
337             }
338             addr += firstPageLen;
339             pBuffer += firstPageLen;
340         }else if(i == pageNum - 1){        \/\/\u5c3e\u9875\u5199\u5165\u957f\u5ea6\u4e3alastPageLen
341             if(FLASH_PageWrite(addr, pBuffer, lastPageLen)){
342                 goto write_fail;
343             }
344             addr += lastPageLen;
345             pBuffer += lastPageLen;
346         }else{                            \/\/\u9664\u9996\u9875\u548c\u5c3e\u9875\u5916\u5199\u5165\u957f\u5ea6\u4e3aFLASH_PAGE_SIZE
347             if(FLASH_PageWrite(addr, pBuffer, FLASH_PAGE_SIZE)){
348                 goto write_fail;
349             }
350             addr += FLASH_PAGE_SIZE;
351             pBuffer += FLASH_PAGE_SIZE;
352         }
353     }
354     
355     return 0;
356 
357 write_fail:
358     return 1;
359 }

\u672c\u6587\u8f6c\u8f7d\u81ea\u201chttps:\/\/www.cnblogs.com\/greatpumpkin\/p\/13747892.html\u201d<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u672c\u6587\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528STM32\u6807\u51c6\u5916\u8bbe\u5e93\u9a71\u52a8FLASH\uff0c\u672c\u4f8b\u7a0b\u9a71\u52a8\u7684FLASH\u4e3aW25Q64\u3002 \u672c\u6587\u9002\u5408\u5bf9\u5355\u7247\u673a\u53ca … <\/p>\n
\u7ee7\u7eed\u9605\u8bfb\u201cSTM32\u4e4bFLASH\u9a71\u52a8\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-189","post","type-post","status-publish","format-standard","hentry","category-date","entry"],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/wp.ytdx.cc\/index.php\/wp-json\/wp\/v2\/posts\/189","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.ytdx.cc\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.ytdx.cc\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.ytdx.cc\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.ytdx.cc\/index.php\/wp-json\/wp\/v2\/comments?post=189"}],"version-history":[{"count":1,"href":"https:\/\/wp.ytdx.cc\/index.php\/wp-json\/wp\/v2\/posts\/189\/revisions"}],"predecessor-version":[{"id":190,"href":"https:\/\/wp.ytdx.cc\/index.php\/wp-json\/wp\/v2\/posts\/189\/revisions\/190"}],"wp:attachment":[{"href":"https:\/\/wp.ytdx.cc\/index.php\/wp-json\/wp\/v2\/media?parent=189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.ytdx.cc\/index.php\/wp-json\/wp\/v2\/categories?post=189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.ytdx.cc\/index.php\/wp-json\/wp\/v2\/tags?post=189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}