{"id":11109,"date":"2023-08-23T01:20:31","date_gmt":"2023-08-22T17:20:31","guid":{"rendered":"https:\/\/blog.iyatt.com\/?p=11109"},"modified":"2024-05-05T12:31:50","modified_gmt":"2024-05-05T04:31:50","slug":"mf-rc522-%e5%b0%84%e9%a2%91%e6%a8%a1%e5%9d%97%ef%bc%88%e6%9c%aa%e5%ae%8c%e6%88%90%ef%bc%89","status":"publish","type":"post","link":"https:\/\/blog.iyatt.com\/?p=11109","title":{"rendered":"MF RC522 \u5c04\u9891\u6a21\u5757\uff08\u672a\u5b8c\u6210\uff09"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blog.iyatt.com\/?p=11109\/#%E5%89%8D%E8%A8%80\" >\u524d\u8a00<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blog.iyatt.com\/?p=11109\/#%E6%B5%8B%E8%AF%95%E4%BD%BF%E7%94%A8\" >\u6d4b\u8bd5\u4f7f\u7528<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/blog.iyatt.com\/?p=11109\/#Arduino\" >Arduino<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/blog.iyatt.com\/?p=11109\/#%E6%8E%A5%E7%BA%BF\" >\u63a5\u7ebf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/blog.iyatt.com\/?p=11109\/#%E4%B8%8D%E4%BD%BF%E7%94%A8%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93\" >\u4e0d\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/blog.iyatt.com\/?p=11109\/#%E8%AF%BB%E5%8D%A1%E5%8F%B7\" >\u8bfb\u5361\u53f7<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/blog.iyatt.com\/?p=11109\/#MFRC522%EF%BC%88%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%EF%BC%89\" >MFRC522\uff08\u7b2c\u4e09\u65b9\u5e93\uff09<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/blog.iyatt.com\/?p=11109\/#%E6%A8%A1%E5%9D%97%E6%B5%8B%E8%AF%95\" >\u6a21\u5757\u6d4b\u8bd5<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"%E5%89%8D%E8%A8%80\"><\/span>\u524d\u8a00<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692702743405.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 384px; --smush-placeholder-aspect-ratio: 384\/496;\" \/><\/p>\n<p>\u6211\u4e70\u7684\u8fd9\u4e2a\u6a21\u5757\uff0c\u9644\u5e26\u4e86\u4e00\u5f20\u6807\u51c6 S50 \u7a7a\u767d\u5361\u548c\u4e00\u4e2a S50 \u5f02\u5f62\u5361\uff08\u94a5\u5319\u5361\uff09\u3002<\/p>\n<p>MF RC522 \u662f\u5e94\u7528\u4e8e 13.56MHz \u975e\u63a5\u89e6\u5f0f\u901a\u4fe1\u4e2d\u9ad8\u96c6\u6210\u5ea6\u7684\u8bfb\u5199\u5361\u82af\u7247\uff0c\u662f NXP \u516c\u53f8\u9488\u5bf9\u201c\u4e09\u8868&#8217;\u5e94\u7528\u63a8\u51fa\u7684\u4e00\u6b3e\u4f4e\u7535\u538b\u3001\u4f4e\u6210\u672c\u3001\u4f53\u79ef\u5c0f\u7684\u975e\u63a5\u89e6\u5f0f\u8bfb\u5199\u5361\u82af\u7247\uff0c\u662f\u667a\u80fd\u4eea\u8868\u548c\u4fbf\u643a\u5f0f\u624b\u6301\u8bbe\u5907\u7814\u53d1\u7684\u8f83\u597d\u9009\u62e9\u3002MF RC522\u5229\u7528\u4e86\u5148\u8fdb\u7684\u8c03\u5236\u548c\u89e3\u8c03\u6982\u5ff5\uff0c\u5b8c\u5168\u96c6\u6210\u4e86\u5728 13.56MHz \u4e0b\u6240\u6709\u7c7b\u578b\u7684\u88ab\u52a8\u975e\u63a5\u89e6\u5f0f\u901a\u4fe1\u65b9\u5f0f\u548c\u534f\u8bae\u3002\u652f\u6301 14443A \u517c\u5bb9\u5e94\u7b54\u5668\u4fe1\u53f7\u3002\u6570\u5b57\u90e8\u5206\u5904\u7406 ISO14443A \u5e27\u548c\u9519\u8bef\u68c0\u6d4b\u3002\u6b64\u5916\uff0c\u8fd8\u652f\u6301\u5feb\u901f CRYPTO1 \u52a0\u5bc6\u7b97\u6cd5\uff0c\u7528\u4e8e\u9a8c\u8bc1 MIFARE \u7cfb\u5217\u4ea7\u54c1\u3002MF RC522 \u652f\u6301 MIFARE \u7cfb\u5217\u66f4\u9ad8\u901f\u7684\u975e\u63a5\u89e6\u5f0f\u901a\u4fe1\uff0c\u53cc\u5411\u6570\u636e\u4f20\u8f93\u901f\u7387\u9ad8\u8fbe 424kbit\/s\uff0c\u5b83\u4e0e\u4e3b\u673a\u95f4\u901a\u4fe1\u91c7\u7528 SPI \u6a21\u5f0f\u3002<br \/>\n\u652f\u6301\u7684\u5361\u578b\u6709\uff1amifare1 S50\u3001 mifare1 S70\u3001 mifare UltraLight\u3001 mifare Pro\u3001mifare Desfire<\/p>\n<h1><span class=\"ez-toc-section\" id=\"%E6%B5%8B%E8%AF%95%E4%BD%BF%E7%94%A8\"><\/span>\u6d4b\u8bd5\u4f7f\u7528<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"Arduino\"><\/span>Arduino<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Arduino UNO<br \/>\nArduino IDE 2.1.1<\/p>\n<p>\u6ce8\uff1a\u5982\u679c\u9047\u5230\u4e0b\u8f7d\u7a0b\u5e8f\u8d85\u65f6\u5931\u8d25\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u62d4\u6389 MOSI \u5f15\u811a\u63a5\u7ebf\uff0c\u4e4b\u540e\u6309\u4e00\u4e0b Arduino UNO \u4e0a\u7684\u91cd\u542f\u6309\u94ae\uff0c\u518d\u4e0b\u8f7d\uff0c\u6700\u540e\u518d\u63d2\u4e0a MOSI \u63a5\u7ebf\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E6%8E%A5%E7%BA%BF\"><\/span>\u63a5\u7ebf<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<pre><code class=\"language-katex\">\\begin{array}{|c|c|}\n\\hline\nMFRC522 &amp; Arduino \\\\\n\\hline\n3V3 &amp; 3.3V \\\\\n\\hline\nRST &amp; 9 \\\\\n\\hline\nGND &amp; GND \\\\\n\\hline\nIRQ &amp; \\\\\n\\hline\nMISO &amp; 12 \\\\\n\\hline\nMOSI &amp; 11 \\\\\n\\hline\nSCK &amp; 13 \\\\\n\\hline\nSDA &amp; 10 \\\\\n\\hline\n\\end{array}<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"%E4%B8%8D%E4%BD%BF%E7%94%A8%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93\"><\/span>\u4e0d\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"%E8%AF%BB%E5%8D%A1%E5%8F%B7\"><\/span>\u8bfb\u5361\u53f7<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u662f\u5546\u5bb6\u63d0\u4f9b\u7684\u8d44\u6599\u91cc\u7684\uff08\u6211\u6539\u52a8\u4e86\u4e00\u70b9\u70b9\uff09<\/p>\n<pre><code class=\"language-cpp\">#include &lt;SPI.h&gt;\n\n#define uchar   unsigned char\n#define uint    unsigned int\n\n\/\/\u6570\u7ec4\u6700\u5927\u957f\u5ea6\n#define MAX_LEN 16\n\n\/\/ \u53ef\u9009\u5f15\u811a\nconst int chipSelectPin = 10;   \/\/ SDA\nconst int NRSTPD = 9;           \/\/ RST\n\n\/\/MF522\u547d\u4ee4\u5b57\n#define PCD_IDLE              0x00               \/\/NO action;\u53d6\u6d88\u5f53\u524d\u547d\u4ee4\n#define PCD_AUTHENT           0x0E               \/\/\u9a8c\u8bc1\u5bc6\u94a5\n#define PCD_RECEIVE           0x08               \/\/\u63a5\u6536\u6570\u636e\n#define PCD_TRANSMIT          0x04               \/\/\u53d1\u9001\u6570\u636e\n#define PCD_TRANSCEIVE        0x0C               \/\/\u53d1\u9001\u5e76\u63a5\u6536\u6570\u636e\n#define PCD_RESETPHASE        0x0F               \/\/\u590d\u4f4d\n#define PCD_CALCCRC           0x03               \/\/CRC\u8ba1\u7b97\n\n\/\/Mifare_One\u5361\u7247\u547d\u4ee4\u5b57\n#define PICC_REQIDL           0x26               \/\/\u5bfb\u5929\u7ebf\u533a\u5185\u672a\u8fdb\u5165\u4f11\u7720\u72b6\u6001\n#define PICC_REQALL           0x52               \/\/\u5bfb\u5929\u7ebf\u533a\u5185\u5168\u90e8\u5361\n#define PICC_ANTICOLL         0x93               \/\/\u9632\u51b2\u649e\n#define PICC_SElECTTAG        0x95              \/\/\u9009\u536193\n#define PICC_AUTHENT1A        0x60               \/\/\u9a8c\u8bc1A\u5bc6\u94a5\n#define PICC_AUTHENT1B        0x61               \/\/\u9a8c\u8bc1B\u5bc6\u94a5\n#define PICC_READ             0x30               \/\/\u8bfb\u5757\n#define PICC_WRITE            0xA0               \/\/\u5199\u5757\n#define PICC_DECREMENT        0xC0               \n#define PICC_INCREMENT        0xC1               \n#define PICC_RESTORE          0xC2               \/\/\u8c03\u5757\u6570\u636e\u5230\u7f13\u51b2\u533a\n#define PICC_TRANSFER         0xB0               \/\/\u4fdd\u5b58\u7f13\u51b2\u533a\u4e2d\u6570\u636e\n#define PICC_HALT             0x50               \/\/\u4f11\u7720\n\n\/\/\u548cMF522\u901a\u8baf\u65f6\u8fd4\u56de\u7684\u9519\u8bef\u4ee3\u7801\n#define MI_OK                 0\n#define MI_NOTAGERR           (-1)  \/\/1\n#define MI_ERR                (-2)  \/\/2\n\n\/\/------------------MFRC522\u5bc4\u5b58\u5668---------------\n\/\/Page 0:Command and Status\n#define     Reserved00            0x00    \n#define     CommandReg            0x01    \n#define     CommIEnReg            0x02    \n#define     DivlEnReg             0x03    \n#define     CommIrqReg            0x04    \n#define     DivIrqReg             0x05\n#define     ErrorReg              0x06    \n#define     Status1Reg            0x07    \n#define     Status2Reg            0x08    \n#define     FIFODataReg           0x09\n#define     FIFOLevelReg          0x0A\n#define     WaterLevelReg         0x0B\n#define     ControlReg            0x0C\n#define     BitFramingReg         0x0D\n#define     CollReg               0x0E\n#define     Reserved01            0x0F\n\/\/Page 1:Command     \n#define     Reserved10            0x10\n#define     ModeReg               0x11\n#define     TxModeReg             0x12\n#define     RxModeReg             0x13\n#define     TxControlReg          0x14\n#define     TxAutoReg             0x15\n#define     TxSelReg              0x16\n#define     RxSelReg              0x17\n#define     RxThresholdReg        0x18\n#define     DemodReg              0x19\n#define     Reserved11            0x1A\n#define     Reserved12            0x1B\n#define     MifareReg             0x1C\n#define     Reserved13            0x1D\n#define     Reserved14            0x1E\n#define     SerialSpeedReg        0x1F\n\/\/Page 2:CFG    \n#define     Reserved20            0x20  \n#define     CRCResultRegM         0x21\n#define     CRCResultRegL         0x22\n#define     Reserved21            0x23\n#define     ModWidthReg           0x24\n#define     Reserved22            0x25\n#define     RFCfgReg              0x26\n#define     GsNReg                0x27\n#define     CWGsPReg                0x28\n#define     ModGsPReg             0x29\n#define     TModeReg              0x2A\n#define     TPrescalerReg         0x2B\n#define     TReloadRegH           0x2C\n#define     TReloadRegL           0x2D\n#define     TCounterValueRegH     0x2E\n#define     TCounterValueRegL     0x2F\n\/\/Page 3:TestRegister     \n#define     Reserved30            0x30\n#define     TestSel1Reg           0x31\n#define     TestSel2Reg           0x32\n#define     TestPinEnReg          0x33\n#define     TestPinValueReg       0x34\n#define     TestBusReg            0x35\n#define     AutoTestReg           0x36\n#define     VersionReg            0x37\n#define     AnalogTestReg         0x38\n#define     TestDAC1Reg           0x39  \n#define     TestDAC2Reg           0x3A   \n#define     TestADCReg            0x3B   \n#define     Reserved31            0x3C   \n#define     Reserved32            0x3D   \n#define     Reserved33            0x3E   \n#define     Reserved34                0x3F\n\/\/-----------------------------------------------\n\n\/\/4\u5b57\u8282\u5361\u5e8f\u5217\u53f7\uff0c\u7b2c5\u5b57\u8282\u4e3a\u6821\u9a8c\u5b57\u8282\nuchar serNum[5];\nuchar  writeDate[16] ={&#039;T&#039;, &#039;e&#039;, &#039;n&#039;, &#039;g&#039;, &#039; &#039;, &#039;B&#039;, &#039;o&#039;, 0, 0, 0, 0, 0, 0, 0, 0,0};\n\/\/\u6247\u533aA\u5bc6\u7801\uff0c16\u4e2a\u6247\u533a\uff0c\u6bcf\u4e2a\u6247\u533a\u5bc6\u78016Byte\n uchar sectorKeyA[16][16] = {{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},\n                             {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},\n                             {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},\n                            };\n uchar sectorNewKeyA[16][16] = {{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},\n                                {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xff,0x07,0x80,0x69, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},\n                                {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xff,0x07,0x80,0x69, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},\n                               };\n\nvoid setup() {                \n    Serial.begin(9600); \n    \/\/ start the SPI library:\n    SPI.begin();\n\n    pinMode(chipSelectPin,OUTPUT);             \/\/ Set digital pin 10 as OUTPUT to connect it to the RFID \/ENABLE pin \n    digitalWrite(chipSelectPin, LOW);          \/\/ Activate the RFID reader\n    pinMode(NRSTPD,OUTPUT);               \/\/ Set digital pin 10 , Not Reset and Power-down\n    digitalWrite(NRSTPD, HIGH);\n\n    MFRC522_Init();  \n}\n\nvoid loop()\n{\n    uchar i,tmp;\n    uchar status;\n    uchar str[MAX_LEN];\n    uchar RC_size;\n    uchar blockAddr;    \/\/\u9009\u62e9\u64cd\u4f5c\u7684\u5757\u5730\u57400\uff5e63\n\n    \/\/\u5bfb\u5361\uff0c\u8fd4\u56de\u5361\u7c7b\u578b  \n    status = MFRC522_Request(PICC_REQIDL, str); \n    if (status == MI_OK)\n    {\n\n    }\n\n    \/\/\u9632\u51b2\u649e\uff0c\u8fd4\u56de\u5361\u7684\u5e8f\u5217\u53f7 4\u5b57\u8282\n    status = MFRC522_Anticoll(str);\n    memcpy(serNum, str, 5);\n    if (status == MI_OK)\n    {\n                    Serial.print(&quot;\u5361\u53f7\u662f\uff1a&quot;);\n        Serial.print(serNum[0], HEX);\n                    Serial.print(&quot; &quot;);            \n        Serial.print(serNum[1], HEX);\n                    Serial.print(&quot; &quot;);      \n        Serial.print(serNum[2], HEX);\n                    Serial.print(&quot; &quot;);      \n        Serial.print(serNum[3], HEX);\n                    Serial.print(&quot; &quot;);   \n        Serial.print(serNum[4], HEX);                       \n                    Serial.println(&quot; &quot;);\n    }\n\n    \/\/\u9009\u5361\uff0c\u8fd4\u56de\u5361\u5bb9\u91cf\n    RC_size = MFRC522_SelectTag(serNum);\n    if (RC_size != 0)\n    {}\n\n    \/\/\u5199\u6570\u636e\u5361\n    blockAddr = 7;      \/\/\u6570\u636e\u57577      \n    status = MFRC522_Auth(PICC_AUTHENT1A, blockAddr, sectorKeyA[blockAddr\/4], serNum);  \/\/\u8ba4\u8bc1\n    if (status == MI_OK)\n    {\n        \/\/\u5199\u6570\u636e\n        status = MFRC522_Write(blockAddr, sectorNewKeyA[blockAddr\/4]);\n                    Serial.print(&quot;set the new card password, and can modify the data of the Sector: &quot;);\n                    Serial.print(blockAddr\/4,DEC);\n\n                    \/\/\u5199\u6570\u636e\n                    blockAddr = blockAddr - 3 ; \n                    status = MFRC522_Write(blockAddr, writeDate);\n                    if(status == MI_OK)\n                    {\n                        Serial.println(&quot;OK!&quot;);\n                    }\n    }\n\n    \/\/\u8bfb\u5361\n    blockAddr = 7;      \/\/\u6570\u636e\u57577      \n    status = MFRC522_Auth(PICC_AUTHENT1A, blockAddr, sectorNewKeyA[blockAddr\/4], serNum);   \/\/\u8ba4\u8bc1\n    if (status == MI_OK)\n    {\n        \/\/\u8bfb\u6570\u636e\n                    blockAddr = blockAddr - 3 ; \n                    status = MFRC522_Read(blockAddr, str);\n        if (status == MI_OK)\n        {\n                            Serial.println(&quot;Read from the card ,the data is : &quot;);\n            for (i=0; i&lt;16; i++)\n            {\n                            Serial.print(str[i]);\n            }\n                            Serial.println(&quot; \\n&quot;);\n        }\n    }\n            \/\/Serial.println(&quot; &quot;);\n    MFRC522_Halt();         \/\/\u547d\u4ee4\u5361\u7247\u8fdb\u5165\u4f11\u7720\u72b6\u6001\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aWrite_MFRC5200\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u5411MFRC522\u7684\u67d0\u4e00\u5bc4\u5b58\u5668\u5199\u4e00\u4e2a\u5b57\u8282\u6570\u636e\n * \u8f93\u5165\u53c2\u6570\uff1aaddr--\u5bc4\u5b58\u5668\u5730\u5740\uff1bval--\u8981\u5199\u5165\u7684\u503c\n * \u8fd4 \u56de \u503c\uff1a\u65e0\n *\/\nvoid Write_MFRC522(uchar addr, uchar val)\n{\n    digitalWrite(chipSelectPin, LOW);\n\n    \/\/\u5730\u5740\u683c\u5f0f\uff1a0XXXXXX0\n    SPI.transfer((addr&lt;&lt;1)&amp;0x7E); \n    SPI.transfer(val);\n\n    digitalWrite(chipSelectPin, HIGH);\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aRead_MFRC522\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u4eceMFRC522\u7684\u67d0\u4e00\u5bc4\u5b58\u5668\u8bfb\u4e00\u4e2a\u5b57\u8282\u6570\u636e\n * \u8f93\u5165\u53c2\u6570\uff1aaddr--\u5bc4\u5b58\u5668\u5730\u5740\n * \u8fd4 \u56de \u503c\uff1a\u8fd4\u56de\u8bfb\u53d6\u5230\u7684\u4e00\u4e2a\u5b57\u8282\u6570\u636e\n *\/\nuchar Read_MFRC522(uchar addr)\n{\n    uchar val;\n\n    digitalWrite(chipSelectPin, LOW);\n\n    \/\/\u5730\u5740\u683c\u5f0f\uff1a1XXXXXX0\n    SPI.transfer(((addr&lt;&lt;1)&amp;0x7E) | 0x80);    \n    val =SPI.transfer(0x00);\n\n    digitalWrite(chipSelectPin, HIGH);\n\n    return val; \n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aSetBitMask\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u7f6eRC522\u5bc4\u5b58\u5668\u4f4d\n * \u8f93\u5165\u53c2\u6570\uff1areg--\u5bc4\u5b58\u5668\u5730\u5740;mask--\u7f6e\u4f4d\u503c\n * \u8fd4 \u56de \u503c\uff1a\u65e0\n *\/\nvoid SetBitMask(uchar reg, uchar mask)  \n{\n    uchar tmp;\n    tmp = Read_MFRC522(reg);\n    Write_MFRC522(reg, tmp | mask);  \/\/ set bit mask\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aClearBitMask\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u6e05RC522\u5bc4\u5b58\u5668\u4f4d\n * \u8f93\u5165\u53c2\u6570\uff1areg--\u5bc4\u5b58\u5668\u5730\u5740;mask--\u6e05\u4f4d\u503c\n * \u8fd4 \u56de \u503c\uff1a\u65e0\n *\/\nvoid ClearBitMask(uchar reg, uchar mask)  \n{\n    uchar tmp;\n    tmp = Read_MFRC522(reg);\n    Write_MFRC522(reg, tmp &amp; (~mask));  \/\/ clear bit mask\n} \n\n\/*\n * \u51fd \u6570 \u540d\uff1aAntennaOn\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u5f00\u542f\u5929\u7ebf,\u6bcf\u6b21\u542f\u52a8\u6216\u5173\u95ed\u5929\u9669\u53d1\u5c04\u4e4b\u95f4\u5e94\u81f3\u5c11\u67091ms\u7684\u95f4\u9694\n * \u8f93\u5165\u53c2\u6570\uff1a\u65e0\n * \u8fd4 \u56de \u503c\uff1a\u65e0\n *\/\nvoid AntennaOn(void)\n{\n    uchar temp;\n\n    temp = Read_MFRC522(TxControlReg);\n    if (!(temp &amp; 0x03))\n    {\n        SetBitMask(TxControlReg, 0x03);\n    }\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aAntennaOff\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u5173\u95ed\u5929\u7ebf,\u6bcf\u6b21\u542f\u52a8\u6216\u5173\u95ed\u5929\u9669\u53d1\u5c04\u4e4b\u95f4\u5e94\u81f3\u5c11\u67091ms\u7684\u95f4\u9694\n * \u8f93\u5165\u53c2\u6570\uff1a\u65e0\n * \u8fd4 \u56de \u503c\uff1a\u65e0\n *\/\nvoid AntennaOff(void)\n{\n    ClearBitMask(TxControlReg, 0x03);\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aResetMFRC522\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u590d\u4f4dRC522\n * \u8f93\u5165\u53c2\u6570\uff1a\u65e0\n * \u8fd4 \u56de \u503c\uff1a\u65e0\n *\/\nvoid MFRC522_Reset(void)\n{\n    Write_MFRC522(CommandReg, PCD_RESETPHASE);\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aInitMFRC522\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u521d\u59cb\u5316RC522\n * \u8f93\u5165\u53c2\u6570\uff1a\u65e0\n * \u8fd4 \u56de \u503c\uff1a\u65e0\n *\/\nvoid MFRC522_Init(void)\n{\n    digitalWrite(NRSTPD,HIGH);\n\n    MFRC522_Reset();\n  \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\n        delay(500);\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\n \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\n    \/\/Timer: TPrescaler*TreloadVal\/6.78MHz = 24ms\n    Write_MFRC522(TModeReg, 0x8D);      \/\/Tauto=1; f(Timer) = 6.78MHz\/TPreScaler\n    Write_MFRC522(TPrescalerReg, 0x3E); \/\/TModeReg[3..0] + TPrescalerReg\n    Write_MFRC522(TReloadRegL, 30);           \n    Write_MFRC522(TReloadRegH, 0);\n\n    Write_MFRC522(TxAutoReg, 0x40);     \/\/100%ASK\n    Write_MFRC522(ModeReg, 0x3D);       \/\/CRC\u521d\u59cb\u503c0x6363  ???\n\n    \/\/ClearBitMask(Status2Reg, 0x08);       \/\/MFCrypto1On=0\n    \/\/Write_MFRC522(RxSelReg, 0x86);        \/\/RxWait = RxSelReg[5..0]\n    \/\/Write_MFRC522(RFCfgReg, 0x7F);        \/\/RxGain = 48dB\n\n    AntennaOn();        \/\/\u6253\u5f00\u5929\u7ebf\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aMFRC522_Request\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u5bfb\u5361\uff0c\u8bfb\u53d6\u5361\u7c7b\u578b\u53f7\n * \u8f93\u5165\u53c2\u6570\uff1areqMode--\u5bfb\u5361\u65b9\u5f0f\uff0c\n *           TagType--\u8fd4\u56de\u5361\u7247\u7c7b\u578b\n *              0x4400 = Mifare_UltraLight\n *              0x0400 = Mifare_One(S50)\n *              0x0200 = Mifare_One(S70)\n *              0x0800 = Mifare_Pro(X)\n *              0x4403 = Mifare_DESFire\n * \u8fd4 \u56de \u503c\uff1a\u6210\u529f\u8fd4\u56deMI_OK\n *\/\nuchar MFRC522_Request(uchar reqMode, uchar *TagType)\n{\n    uchar status;  \n    uint backBits;          \/\/\u63a5\u6536\u5230\u7684\u6570\u636e\u4f4d\u6570\n\n    Write_MFRC522(BitFramingReg, 0x07);     \/\/TxLastBists = BitFramingReg[2..0] ???\n\n    TagType[0] = reqMode;\n    status = MFRC522_ToCard(PCD_TRANSCEIVE, TagType, 1, TagType, &amp;backBits);\n\n    if ((status != MI_OK) || (backBits != 0x10))\n    {    \n        status = MI_ERR;\n    }\n\n    return status;\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aMFRC522_ToCard\n * \u529f\u80fd\u63cf\u8ff0\uff1aRC522\u548cISO14443\u5361\u901a\u8baf\n * \u8f93\u5165\u53c2\u6570\uff1acommand--MF522\u547d\u4ee4\u5b57\uff0c\n *           sendData--\u901a\u8fc7RC522\u53d1\u9001\u5230\u5361\u7247\u7684\u6570\u636e, \n *           sendLen--\u53d1\u9001\u7684\u6570\u636e\u957f\u5ea6        \n *           backData--\u63a5\u6536\u5230\u7684\u5361\u7247\u8fd4\u56de\u6570\u636e\uff0c\n *           backLen--\u8fd4\u56de\u6570\u636e\u7684\u4f4d\u957f\u5ea6\n * \u8fd4 \u56de \u503c\uff1a\u6210\u529f\u8fd4\u56deMI_OK\n *\/\nuchar MFRC522_ToCard(uchar command, uchar *sendData, uchar sendLen, uchar *backData, uint *backLen)\n{\n    uchar status = MI_ERR;\n    uchar irqEn = 0x00;\n    uchar waitIRq = 0x00;\n    uchar lastBits;\n    uchar n;\n    uint i;\n\n    switch (command)\n    {\n        case PCD_AUTHENT:       \/\/\u8ba4\u8bc1\u5361\u5bc6\n        {\n            irqEn = 0x12;\n            waitIRq = 0x10;\n            break;\n        }\n        case PCD_TRANSCEIVE:    \/\/\u53d1\u9001FIFO\u4e2d\u6570\u636e\n        {\n            irqEn = 0x77;\n            waitIRq = 0x30;\n            break;\n        }\n        default:\n            break;\n    }\n\n    Write_MFRC522(CommIEnReg, irqEn|0x80);  \/\/\u5141\u8bb8\u4e2d\u65ad\u8bf7\u6c42\n    ClearBitMask(CommIrqReg, 0x80);         \/\/\u6e05\u9664\u6240\u6709\u4e2d\u65ad\u8bf7\u6c42\u4f4d\n    SetBitMask(FIFOLevelReg, 0x80);         \/\/FlushBuffer=1, FIFO\u521d\u59cb\u5316\n\n    Write_MFRC522(CommandReg, PCD_IDLE);    \/\/NO action;\u53d6\u6d88\u5f53\u524d\u547d\u4ee4  ???\n\n    \/\/\u5411FIFO\u4e2d\u5199\u5165\u6570\u636e\n    for (i=0; i&lt;sendLen; i++)\n    {   \n        Write_MFRC522(FIFODataReg, sendData[i]);    \n    }\n\n    \/\/\u6267\u884c\u547d\u4ee4\n    Write_MFRC522(CommandReg, command);\n    if (command == PCD_TRANSCEIVE)\n    {    \n        SetBitMask(BitFramingReg, 0x80);        \/\/StartSend=1,transmission of data starts  \n    }   \n\n    \/\/\u7b49\u5f85\u63a5\u6536\u6570\u636e\u5b8c\u6210\n    i = 2000;   \/\/i\u6839\u636e\u65f6\u949f\u9891\u7387\u8c03\u6574\uff0c\u64cd\u4f5cM1\u5361\u6700\u5927\u7b49\u5f85\u65f6\u95f425ms ???\n    do \n    {\n        \/\/CommIrqReg[7..0]\n        \/\/Set1 TxIRq RxIRq IdleIRq HiAlerIRq LoAlertIRq ErrIRq TimerIRq\n        n = Read_MFRC522(CommIrqReg);\n        i--;\n    }\n    while ((i!=0) &amp;&amp; !(n&amp;0x01) &amp;&amp; !(n&amp;waitIRq));\n\n    ClearBitMask(BitFramingReg, 0x80);          \/\/StartSend=0\n\n    if (i != 0)\n    {    \n        if(!(Read_MFRC522(ErrorReg) &amp; 0x1B))    \/\/BufferOvfl Collerr CRCErr ProtecolErr\n        {\n            status = MI_OK;\n            if (n &amp; irqEn &amp; 0x01)\n            {   \n                status = MI_NOTAGERR;           \/\/??   \n            }\n\n            if (command == PCD_TRANSCEIVE)\n            {\n                n = Read_MFRC522(FIFOLevelReg);\n                lastBits = Read_MFRC522(ControlReg) &amp; 0x07;\n                if (lastBits)\n                {   \n                    *backLen = (n-1)*8 + lastBits;   \n                }\n                else\n                {   \n                    *backLen = n*8;   \n                }\n\n                if (n == 0)\n                {   \n                    n = 1;    \n                }\n                if (n &gt; MAX_LEN)\n                {   \n                    n = MAX_LEN;   \n                }\n\n                \/\/\u8bfb\u53d6FIFO\u4e2d\u63a5\u6536\u5230\u7684\u6570\u636e\n                for (i=0; i&lt;n; i++)\n                {   \n                    backData[i] = Read_MFRC522(FIFODataReg);    \n                }\n            }\n        }\n        else\n        {   \n            status = MI_ERR;  \n        }\n\n    }\n\n    \/\/SetBitMask(ControlReg,0x80);           \/\/timer stops\n    \/\/Write_MFRC522(CommandReg, PCD_IDLE); \n\n    return status;\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aMFRC522_Anticoll\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u9632\u51b2\u7a81\u68c0\u6d4b\uff0c\u8bfb\u53d6\u9009\u4e2d\u5361\u7247\u7684\u5361\u5e8f\u5217\u53f7\n * \u8f93\u5165\u53c2\u6570\uff1aserNum--\u8fd4\u56de4\u5b57\u8282\u5361\u5e8f\u5217\u53f7,\u7b2c5\u5b57\u8282\u4e3a\u6821\u9a8c\u5b57\u8282\n * \u8fd4 \u56de \u503c\uff1a\u6210\u529f\u8fd4\u56deMI_OK\n *\/\nuchar MFRC522_Anticoll(uchar *serNum)\n{\n    uchar status;\n    uchar i;\n    uchar serNumCheck=0;\n    uint unLen;\n\n    \/\/ClearBitMask(Status2Reg, 0x08);       \/\/TempSensclear\n    \/\/ClearBitMask(CollReg,0x80);           \/\/ValuesAfterColl\n    Write_MFRC522(BitFramingReg, 0x00);     \/\/TxLastBists = BitFramingReg[2..0]\n\n    serNum[0] = PICC_ANTICOLL;\n    serNum[1] = 0x20;\n    status = MFRC522_ToCard(PCD_TRANSCEIVE, serNum, 2, serNum, &amp;unLen);\n\n    if (status == MI_OK)\n    {\n        \/\/\u6821\u9a8c\u5361\u5e8f\u5217\u53f7\n        for (i=0; i&lt;4; i++)\n        {   \n            serNumCheck ^= serNum[i];\n        }\n        if (serNumCheck != serNum[i])\n        {   \n            status = MI_ERR;    \n        }\n    }\n\n    \/\/SetBitMask(CollReg, 0x80);        \/\/ValuesAfterColl=1\n\n    return status;\n} \n\n\/*\n * \u51fd \u6570 \u540d\uff1aCalulateCRC\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u7528MF522\u8ba1\u7b97CRC\n * \u8f93\u5165\u53c2\u6570\uff1apIndata--\u8981\u8bfb\u6570CRC\u7684\u6570\u636e\uff0clen--\u6570\u636e\u957f\u5ea6\uff0cpOutData--\u8ba1\u7b97\u7684CRC\u7ed3\u679c\n * \u8fd4 \u56de \u503c\uff1a\u65e0\n *\/\nvoid CalulateCRC(uchar *pIndata, uchar len, uchar *pOutData)\n{\n    uchar i, n;\n\n    ClearBitMask(DivIrqReg, 0x04);          \/\/CRCIrq = 0\n    SetBitMask(FIFOLevelReg, 0x80);         \/\/\u6e05FIFO\u6307\u9488\n    \/\/Write_MFRC522(CommandReg, PCD_IDLE);\n\n    \/\/\u5411FIFO\u4e2d\u5199\u5165\u6570\u636e    \n    for (i=0; i&lt;len; i++)\n    {   \n        Write_MFRC522(FIFODataReg, *(pIndata+i));   \n    }\n    Write_MFRC522(CommandReg, PCD_CALCCRC);\n\n    \/\/\u7b49\u5f85CRC\u8ba1\u7b97\u5b8c\u6210\n    i = 0xFF;\n    do \n    {\n        n = Read_MFRC522(DivIrqReg);\n        i--;\n    }\n    while ((i!=0) &amp;&amp; !(n&amp;0x04));            \/\/CRCIrq = 1\n\n    \/\/\u8bfb\u53d6CRC\u8ba1\u7b97\u7ed3\u679c\n    pOutData[0] = Read_MFRC522(CRCResultRegL);\n    pOutData[1] = Read_MFRC522(CRCResultRegM);\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aMFRC522_SelectTag\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u9009\u5361\uff0c\u8bfb\u53d6\u5361\u5b58\u50a8\u5668\u5bb9\u91cf\n * \u8f93\u5165\u53c2\u6570\uff1aserNum--\u4f20\u5165\u5361\u5e8f\u5217\u53f7\n * \u8fd4 \u56de \u503c\uff1a\u6210\u529f\u8fd4\u56de\u5361\u5bb9\u91cf\n *\/\nuchar MFRC522_SelectTag(uchar *serNum)\n{\n    uchar i;\n    uchar status;\n    uchar size;\n    uint recvBits;\n    uchar buffer[9]; \n\n    \/\/ClearBitMask(Status2Reg, 0x08);           \/\/MFCrypto1On=0\n\n    buffer[0] = PICC_SElECTTAG;\n    buffer[1] = 0x70;\n    for (i=0; i&lt;5; i++)\n    {\n        buffer[i+2] = *(serNum+i);\n    }\n    CalulateCRC(buffer, 7, &amp;buffer[7]);     \/\/??\n    status = MFRC522_ToCard(PCD_TRANSCEIVE, buffer, 9, buffer, &amp;recvBits);\n\n    if ((status == MI_OK) &amp;&amp; (recvBits == 0x18))\n    {   \n        size = buffer[0]; \n    }\n    else\n    {   \n        size = 0;    \n    }\n\n    return size;\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aMFRC522_Auth\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u9a8c\u8bc1\u5361\u7247\u5bc6\u7801\n * \u8f93\u5165\u53c2\u6570\uff1aauthMode--\u5bc6\u7801\u9a8c\u8bc1\u6a21\u5f0f\n                 0x60 = \u9a8c\u8bc1A\u5bc6\u94a5\n                 0x61 = \u9a8c\u8bc1B\u5bc6\u94a5 \n             BlockAddr--\u5757\u5730\u5740\n             Sectorkey--\u6247\u533a\u5bc6\u7801\n             serNum--\u5361\u7247\u5e8f\u5217\u53f7\uff0c4\u5b57\u8282\n * \u8fd4 \u56de \u503c\uff1a\u6210\u529f\u8fd4\u56deMI_OK\n *\/\nuchar MFRC522_Auth(uchar authMode, uchar BlockAddr, uchar *Sectorkey, uchar *serNum)\n{\n    uchar status;\n    uint recvBits;\n    uchar i;\n    uchar buff[12]; \n\n    \/\/\u9a8c\u8bc1\u6307\u4ee4+\u5757\u5730\u5740\uff0b\u6247\u533a\u5bc6\u7801\uff0b\u5361\u5e8f\u5217\u53f7\n    buff[0] = authMode;\n    buff[1] = BlockAddr;\n    for (i=0; i&lt;6; i++)\n    {    \n        buff[i+2] = *(Sectorkey+i);   \n    }\n    for (i=0; i&lt;4; i++)\n    {    \n        buff[i+8] = *(serNum+i);   \n    }\n    status = MFRC522_ToCard(PCD_AUTHENT, buff, 12, buff, &amp;recvBits);\n\n    if ((status != MI_OK) || (!(Read_MFRC522(Status2Reg) &amp; 0x08)))\n    {   \n        status = MI_ERR;   \n    }\n\n    return status;\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aMFRC522_Read\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u8bfb\u5757\u6570\u636e\n * \u8f93\u5165\u53c2\u6570\uff1ablockAddr--\u5757\u5730\u5740;recvData--\u8bfb\u51fa\u7684\u5757\u6570\u636e\n * \u8fd4 \u56de \u503c\uff1a\u6210\u529f\u8fd4\u56deMI_OK\n *\/\nuchar MFRC522_Read(uchar blockAddr, uchar *recvData)\n{\n    uchar status;\n    uint unLen;\n\n    recvData[0] = PICC_READ;\n    recvData[1] = blockAddr;\n    CalulateCRC(recvData,2, &amp;recvData[2]);\n    status = MFRC522_ToCard(PCD_TRANSCEIVE, recvData, 4, recvData, &amp;unLen);\n\n    if ((status != MI_OK) || (unLen != 0x90))\n    {\n        status = MI_ERR;\n    }\n\n    return status;\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aMFRC522_Write\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u5199\u5757\u6570\u636e\n * \u8f93\u5165\u53c2\u6570\uff1ablockAddr--\u5757\u5730\u5740;writeData--\u5411\u5757\u519916\u5b57\u8282\u6570\u636e\n * \u8fd4 \u56de \u503c\uff1a\u6210\u529f\u8fd4\u56deMI_OK\n *\/\nuchar MFRC522_Write(uchar blockAddr, uchar *writeData)\n{\n    uchar status;\n    uint recvBits;\n    uchar i;\n    uchar buff[18]; \n\n    buff[0] = PICC_WRITE;\n    buff[1] = blockAddr;\n    CalulateCRC(buff, 2, &amp;buff[2]);\n    status = MFRC522_ToCard(PCD_TRANSCEIVE, buff, 4, buff, &amp;recvBits);\n\n    if ((status != MI_OK) || (recvBits != 4) || ((buff[0] &amp; 0x0F) != 0x0A))\n    {   \n        status = MI_ERR;   \n    }\n\n    if (status == MI_OK)\n    {\n        for (i=0; i&lt;16; i++)     \/\/\u5411FIFO\u519916Byte\u6570\u636e\n        {    \n            buff[i] = *(writeData+i);   \n        }\n        CalulateCRC(buff, 16, &amp;buff[16]);\n        status = MFRC522_ToCard(PCD_TRANSCEIVE, buff, 18, buff, &amp;recvBits);\n\n        if ((status != MI_OK) || (recvBits != 4) || ((buff[0] &amp; 0x0F) != 0x0A))\n        {   \n            status = MI_ERR;   \n        }\n    }\n\n    return status;\n}\n\n\/*\n * \u51fd \u6570 \u540d\uff1aMFRC522_Halt\n * \u529f\u80fd\u63cf\u8ff0\uff1a\u547d\u4ee4\u5361\u7247\u8fdb\u5165\u4f11\u7720\u72b6\u6001\n * \u8f93\u5165\u53c2\u6570\uff1a\u65e0\n * \u8fd4 \u56de \u503c\uff1a\u65e0\n *\/\nvoid MFRC522_Halt(void)\n{\n    uchar status;\n    uint unLen;\n    uchar buff[4]; \n\n    buff[0] = PICC_HALT;\n    buff[1] = 0;\n    CalulateCRC(buff, 2, &amp;buff[2]);\n\n    status = MFRC522_ToCard(PCD_TRANSCEIVE, buff, 4, buff,&amp;unLen);\n}\n<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692724769793.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 344px; --smush-placeholder-aspect-ratio: 344\/242;\" \/><br \/>\n<img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692724760366.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 458px; --smush-placeholder-aspect-ratio: 458\/402;\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"MFRC522%EF%BC%88%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%EF%BC%89\"><\/span>MFRC522\uff08\u7b2c\u4e09\u65b9\u5e93\uff09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>rfid 1.4.10\uff1a<a href=\"https:\/\/github.com\/miguelbalboa\/rfid\">https:\/\/github.com\/miguelbalboa\/rfid<\/a><\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E6%A8%A1%E5%9D%97%E6%B5%8B%E8%AF%95\"><\/span>\u6a21\u5757\u6d4b\u8bd5<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-cpp\">#include &lt;SPI.h&gt;\n#include &lt;MFRC522.h&gt;\n\n#define RST_PIN         9 \/\/ RST\n#define SS_PIN          10 \/\/ SDA\n\nMFRC522 mfrc522(SS_PIN, RST_PIN);  \/\/ Create MFRC522 instance\n\nvoid setup()\n{\n  Serial.begin(9600);\n\n  SPI.begin();\n  mfrc522.PCD_Init();\n\n  Serial.println(F(&quot;*****************************&quot;));\n  Serial.println(F(&quot;MFRC522 \u81ea\u68c0&quot;));\n  Serial.println(F(&quot;*****************************&quot;));\n  mfrc522.PCD_DumpVersionToSerial(); \/\/ \u663e\u793a\u56fa\u4ef6\u7248\u672c\n  Serial.println(F(&quot;-----------------------------&quot;));\n  Serial.println(F(&quot;\u4ec5\u652f\u6301\u5df2\u77e5\u7248\u672c&quot;));\n  Serial.println(F(&quot;-----------------------------&quot;));\n  Serial.println(F(&quot;\u6267\u884c\u6d4b\u8bd5...&quot;));\n  bool result = mfrc522.PCD_PerformSelfTest(); \/\/ \u6d4b\u8bd5\u64cd\u4f5c\n  Serial.println(F(&quot;-----------------------------&quot;));\n  Serial.print(F(&quot;\u7ed3\u679c\uff1a&quot;));\n  if (result)\n  {\n    Serial.println(F(&quot;\u6b63\u5e38&quot;));\n  }\n  else\n  {\n    Serial.println(F(&quot;\u5f02\u5e38&quot;));\n  }\n  Serial.println();\n}\n\nvoid loop()\n{\n\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/08\/image-1692721072998.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 253px; --smush-placeholder-aspect-ratio: 253\/214;\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u6211\u4e70\u7684\u8fd9\u4e2a\u6a21\u5757\uff0c\u9644\u5e26\u4e86\u4e00\u5f20\u6807\u51c6 S50 \u7a7a\u767d\u5361\u548c\u4e00\u4e2a S50 \u5f02\u5f62\u5361\uff08\u94a5\u5319\u5361\uff09\u3002 MF RC522 \u662f\u5e94 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"zakra_page_container_layout":"customizer","zakra_page_sidebar_layout":"customizer","zakra_remove_content_margin":false,"zakra_sidebar":"customizer","zakra_transparent_header":"customizer","zakra_logo":0,"zakra_main_header_style":"default","zakra_menu_item_color":"","zakra_menu_item_hover_color":"","zakra_menu_item_active_color":"","zakra_menu_active_style":"","zakra_page_header":true,"_lmt_disableupdate":"no","_lmt_disable":"no","footnotes":""},"categories":[1],"tags":[],"class_list":["post-11109","post","type-post","status-publish","format-standard","hentry","category-all"],"modified_by":"IYATT-yx","_links":{"self":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts\/11109","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11109"}],"version-history":[{"count":0,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts\/11109\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11109"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}