{"id":6111,"date":"2026-09-08T09:00:00","date_gmt":"2026-09-08T00:00:00","guid":{"rendered":"https:\/\/www.ramxeed.com\/zh-tw\/?post_type=column&p=6111"},"modified":"2026-09-11T17:38:35","modified_gmt":"2026-09-11T08:38:35","slug":"bufferless-data-logging-with-feram","status":"publish","type":"column","link":"https:\/\/www.ramxeed.com\/zh-tw\/tech-column\/bufferless-data-logging-with-feram\/","title":{"rendered":"\u8cc7\u6599\u8a18\u9304\u6548\u7387\u6700\u4f73\u5316\uff1a\u6d3b\u7528FRAM\u7684\u7121\u7de9\u885d\u8cc7\u6599\u7d50\u69cb\u8a2d\u8a08"},"content":{"rendered":"\n

\u672c\u6587\u5c07\u6574\u7406\u8cc7\u6599\u8a18\u9304\u4e2d\u50b3\u7d71\u8a18\u61b6\u9ad4\u6240\u9762\u81e8\u7684\u8ab2\u984c\uff0c\u4e26\u8aaa\u660e\u5982\u4f55\u6d3b\u7528FRAM\uff08FeRAM\uff0c\u9435\u96fb\u8a18\u61b6\u9ad4\uff09\u7684\u9ad8\u901f\u5beb\u5165\u8207\u9ad8\u8010\u4e45\u6027\uff0c\u8a2d\u8a08\u7121\u7de9\u885d\u7684\u8cc7\u6599\u7d50\u69cb\u3002\u5167\u5bb9\u5c07\u4ee5\u5bb9\u6613\u7406\u89e3\u7684\u65b9\u5f0f\uff0c\u4ecb\u7d39\u53ef\u540c\u6642\u5be6\u73fe\u96fb\u6e90\u4e2d\u65b7\u5c0d\u7b56\u3001RAM\u524a\u6e1b\u8207\u5fa9\u539f\u6027\u63d0\u5347\u7684\u5177\u9ad4\u5be6\u4f5c\u91cd\u9ede\u3002<\/p>\n\n\n\n

\u8cc7\u6599\u8a18\u9304\u8a2d\u8a08\u4e2d\u50b3\u7d71\u8a18\u61b6\u9ad4\u7684\u8ab2\u984c<\/h2>\n\n\n\n

\u5728\u9ad8\u983b\u7387\u91cf\u6e2clog\u4e2d\uff0c\u8cc7\u6599\u4fdd\u5b58\u8655\u7406\u7684\u5ef6\u9072\u8207\u8a18\u61b6\u9ad4\u58fd\u547d\uff0c\u5f80\u5f80\u6703\u6210\u70ba\u8a2d\u8a08\u4e0a\u7684\u9650\u5236\u3002Flash\u7684erase\u55ae\u4f4d\u8f03\u5927\uff0c\u4e14\u5b58\u5728\u5beb\u5165\u6b21\u6578\u9650\u5236\uff0c\u56e0\u6b64\u901a\u5e38\u5fc5\u9808\u642d\u914dwear leveling\u3002\u7d50\u679c\u662fRAM buffer\u8207\u72c0\u614b\u7ba1\u7406\u589e\u52a0\uff0c\u5be6\u4f5c\u8207\u9a57\u8b49\u5de5\u6642\u4e5f\u6703\u64f4\u5927\u3002
\u6b64\u5916\uff0c\u5728\u96fb\u6e90\u4e2d\u65b7\u6642\uff0c\u5c1a\u672a\u5beb\u5165\u7684\u8cc7\u6599\u5bb9\u6613\u907a\u5931\uff0c\u70ba\u4e86\u78ba\u4fdd\u4e00\u81f4\u6027\uff0c\u4e5f\u5e38\u9700\u8981\u5c0e\u5165\u96d9\u91cd\u5beb\u5165\u7b49\u8a2d\u8a08\u3002<\/p>\n\n\n\n

Flash\uff0fEEPROM\u4e2d\u7684\u5beb\u5165\u9650\u5236\u8207\u8010\u4e45\u6027\u554f\u984c<\/h3>\n\n\n\n

Flash\u8207EEPROM\u7684cell\u6539\u5beb\u8010\u4e45\u6027\u6709\u9650\uff0c\u82e5\u76f4\u63a5\u7528\u65bc\u9ad8\u983b\u7387log\u8ffd\u52a0\uff0c\u53ef\u80fd\u5c0e\u81f4\u65e9\u671f\u52a3\u5316\u3002
\u6b64\u5916\uff0cFlash\u901a\u5e38\u9700\u8981\u5148erase\u518d\u5beb\u5165\uff0c\u56e0\u6b64\u6703\u7522\u751ferase\u7b49\u5f85\u6642\u9593\uff0c\u4e5f\u6703\u53d7\u5230erase\u55ae\u4f4d\u7684\u9650\u5236\u3002\u5373\u4f7f\u53ea\u662f\u5c11\u91cf\u8cc7\u6599\uff0c\u4e5f\u9700\u8981\u9032\u884cpage\u7ba1\u7406\u3002<\/p>\n\n\n\n

\u56e0\u6b64\uff0c\u7cfb\u7d71\u5f80\u5f80\u9700\u8981\u5be6\u4f5c\u66ab\u5b58log\u7684buffer\u3001erase\u5340\u57df\u7ba1\u7406\uff0c\u4ee5\u53ca\u7528\u4f86\u5e73\u5747\u58fd\u547d\u7684wear leveling\u3002\u9019\u6703\u4f7f\u7a0b\u5f0f\u78bc\u8207\u6e2c\u8a66\u8b8a\u5f97\u66f4\u8907\u96dc\u3002
\u7279\u5225\u662f\u5728\u8003\u91cf\u96fb\u6e90\u4e2d\u65b7\u6642\uff0c\u9084\u9700\u8981\u8a2d\u8a08header\u96d9\u91cd\u5316\u3001checksum\u8207\u66f4\u65b0\u9806\u5e8f\uff0c\u4ee5\u907f\u514d\u5beb\u5165\u9014\u4e2d\u7522\u751f\u8cc7\u6599\u4e0d\u4e00\u81f4\u3002\u7d50\u679c\u662fCPU\u8ca0\u8377\u8207RAM\u5360\u7528\u589e\u52a0\uff0c\u4e5f\u8b93\u4f4e\u529f\u8017\u8a2d\u8a08\u8b8a\u5f97\u66f4\u56f0\u96e3\u3002<\/p>\n\n\n\n

\u6b63\u5728\u5c0b\u627e\u66f4\u9069\u5408\u9ad8\u983b\u7387\u8cc7\u6599\u8a18\u9304\u7684\u8a18\u61b6\u9ad4\u65b9\u6848\u55ce\uff1f<\/strong>
\u82e5\u60a8\u6b63\u5728\u9762\u5c0d Flash\uff0fEEPROM \u5beb\u5165\u9650\u5236\u3001log\u4fdd\u5b58\u53ef\u9760\u6027\u6216 RAM buffer \u589e\u52a0\u7b49\u554f\u984c\uff0c\u6b61\u8fce\u8207\u6211\u5011\u8a0e\u8ad6\u9069\u5408\u5d4c\u5165\u5f0f\u8a2d\u5099\u7684 FeRAM \u61c9\u7528\u65b9\u5f0f\u3002<\/p>\n\n\n\n

\n \n \n \u8aee\u8a62\u8cc7\u6599\u8a18\u9304\u8a18\u61b6\u9ad4\u65b9\u6848\n <\/a>\n <\/strong>\n<\/p>\n\n\n\n

\u7de9\u885d\u8a2d\u8a08\u9020\u6210\u7684\u8a18\u61b6\u9ad4\u7ba1\u7406\u8907\u96dc\u5316<\/h3>\n\n\n\n

\u50b3\u7d71\u8a2d\u8a08\u4e2d\uff0c\u70ba\u4e86\u5438\u6536\u8a18\u9304\u9031\u671f\u8207\u5beb\u5165\u55ae\u4f4d\u4e4b\u9593\u7684\u5dee\u7570\uff0c\u901a\u5e38\u6703\u5148\u5c07\u8cc7\u6599\u66ab\u5b58\u5728RAM\u4e2d\uff0c\u518d\u8f49\u5beb\u5230\u975e\u63ee\u767c\u6027\u8a18\u61b6\u9ad4\u3002
\u4f46\u662fbuffer\u672c\u8eab\u6703\u5e36\u4f86\u8a31\u591a\u7ba1\u7406\u554f\u984c\uff0c\u4f8b\u5982\u5bb9\u91cf\u4f30\u7b97\u3001buffer overflow\u6642\u7684\u8cc7\u6599\u6368\u68c4\u898f\u5247\uff0c\u4ee5\u53ca\u4e0d\u540c\u512a\u5148\u5ea6log\u6df7\u5728\u4e00\u8d77\u6642\u7684\u8655\u7406\u65b9\u5f0f\u3002<\/p>\n\n\n\n

\u82e5\u6709\u591a\u500btask\u540c\u6642\u8a18\u9304\u8cc7\u6599\uff0c\u9084\u9700\u8981\u6392\u4ed6\u63a7\u5236\uff0c\u5bb9\u6613\u5f71\u97ff\u5373\u6642\u6027\u3002\u82e5\u70ba\u4e86\u907f\u514d\u5728interrupt\u4e2d\u76f4\u63a5\u5beb\u5165\uff0c\u5c31\u53ef\u80fd\u9700\u8981\u589e\u52a0queue\u6216ring buffer\uff0c\u5c0e\u81f4\u7cfb\u7d71\u72c0\u614b\u66f4\u52a0\u80a5\u5927\u3002
\u7d50\u679c\u662f\u6f5b\u5728bug\u66f4\u5bb9\u6613\u5b58\u5728\uff0c\u50cf\u662f\u96e3\u4ee5\u91cd\u73fe\u7684\u8cc7\u6599\u7f3a\u6f0f\u3001\u9806\u5e8f\u53cd\u8f49\u7b49\u554f\u984c\uff0c\u4e5f\u6703\u589e\u52a0\u9664\u932f\u6642\u9593\u3002<\/p>\n\n\n\n

\u96fb\u6e90\u4e2d\u65b7\u5c0d\u7b56\u8207log\u907a\u5931\u98a8\u96aa<\/h3>\n\n\n\n

\u96fb\u6e90\u4e2d\u65b7\u662flog\u8a2d\u8a08\u4e2d\u6700\u56f0\u96e3\u7684\u90e8\u5206\u4e4b\u4e00\u3002\u554f\u984c\u4e0d\u53ea\u662f\u5c1a\u672a\u5beb\u5165\u7684\u8cc7\u6599\u6703\u907a\u5931\uff0c\u5beb\u5165\u9014\u4e2d\u7684metadata\u82e5\u640d\u58de\uff0c\u4e5f\u53ef\u80fd\u9020\u6210\u81f4\u547d\u5f71\u97ff\u3002<\/p>\n\n\n\n

\u4f8b\u5982\u5728ring\u7d50\u69cb\u4e2d\uff0c\u82e5\u5beb\u5165\u4f4d\u7f6e\u6216\u6709\u6548\u7bc4\u570d\u8cc7\u8a0a\u640d\u58de\uff0c\u7cfb\u7d71\u53ef\u80fd\u7121\u6cd5\u6b63\u5e38\u5fa9\u539f\uff0c\u6700\u5f8c\u5fc5\u9808\u6383\u63cf\u6574\u500b\u8a18\u61b6\u9ad4\u5340\u57df\u3002
\u70ba\u4e86\u907f\u514d\u9019\u7a2e\u60c5\u6cc1\uff0c\u901a\u5e38\u6703\u7d44\u5408\u4f7f\u7528commit flag\u3001\u4e16\u4ee3\u7de8\u865f\u3001\u96d9\u91cdheader\u3001CRC\u7b49\u65b9\u6cd5\uff0c\u4f46\u5982\u679c\u66f4\u65b0\u9806\u5e8f\u8a2d\u8a08\u932f\u8aa4\uff0c\u53cd\u800c\u53ef\u80fd\u63d0\u9ad8\u8cc7\u6599\u7834\u640d\u98a8\u96aa\u3002<\/p>\n\n\n\n

\u53e6\u5916\uff0c\u96fb\u6e90\u4e2d\u65b7\u6e2c\u8a66\u672c\u8eab\u4e5f\u4e0d\u5bb9\u6613\u689d\u4ef6\u5316\uff0c\u6eab\u5ea6\u3001\u96fb\u58d3\u4e0b\u964d\u659c\u7387\u90fd\u53ef\u80fd\u9020\u6210\u7d50\u679c\u5dee\u7570\u3002\u82e5\u6c92\u6709\u5728\u8a2d\u8a08\u521d\u671f\u5c31\u5b9a\u7fa9\u5305\u542b\u5fa9\u539f\u6d41\u7a0b\u7684\u8cc7\u6599\u7d50\u69cb\uff0c\u5f8c\u671f\u88dc\u6551\u5f80\u5f80\u53ea\u6703\u8b93\u7cfb\u7d71\u66f4\u8907\u96dc\u3002<\/p>\n\n\n\n

FRAM\u7684\u7279\u6027\u8207\u8cc7\u6599\u8a18\u9304\u7684\u9069\u5408\u6027<\/h2>\n\n\n\n

FRAM\u96d6\u7136\u662f\u975e\u63ee\u767c\u6027\u8a18\u61b6\u9ad4\uff0c\u4f46\u5177\u5099byte\u55ae\u4f4d\u9ad8\u901f\u5beb\u5165\u7684\u7279\u6027\u3002\u7531\u65bc\u4e0d\u9700\u8981erase\u6d41\u7a0b\uff0c\u7b49\u5f85\u6642\u9593\u66f4\u5bb9\u6613\u9810\u6e2c\uff0c\u5373\u4f7f\u983b\u7e41\u8ffd\u52a0\u8cc7\u6599\uff0c\u4e5f\u6bd4\u8f03\u5bb9\u6613\u9032\u884c\u58fd\u547d\u8a2d\u8a08\u3002
\u56e0\u6b64\uff0c\u7cfb\u7d71\u53ef\u4ee5\u6e1b\u5c11\u300c\u5148\u7d2f\u7a4d\u518d\u5beb\u5165\u300d\u7684\u524d\u63d0\uff0c\u7e2e\u5c0fRAM buffer\u8207\u8907\u96dc\u7684\u6392\u7a0b\u7ba1\u7406\u3002\u96fb\u6e90\u4e2d\u65b7\u6642\uff0c\u5df2\u5beb\u5165\u7684\u8cc7\u6599\u4e5f\u80fd\u7acb\u5373\u4fdd\u6301\uff0c\u56e0\u6b64\u66f4\u5bb9\u6613\u7c21\u5316commit\u8a2d\u8a08\uff0c\u964d\u4f4elog\u907a\u5931\u98a8\u96aa\u3002<\/p>\n\n\n\n

FRAM\u7684\u57fa\u672c\u52d5\u4f5c\u539f\u7406\u8207\u4f5c\u70ba\u975e\u63ee\u767c\u6027\u8a18\u61b6\u9ad4\u7684\u7279\u9577<\/h3>\n\n\n\n

FRAM\u5229\u7528\u9435\u96fb\u6750\u6599\u7684\u6975\u5316\u72c0\u614b\u4fdd\u5b58\u8cc7\u8a0a\uff0c\u56e0\u6b64\u5373\u4f7f\u96fb\u6e90\u95dc\u9589\uff0c\u8cc7\u6599\u4e5f\u80fd\u88ab\u4fdd\u6301\u3002
\u5b83\u652f\u63f4\u96a8\u6a5f\u5b58\u53d6\uff0c\u53ef\u900f\u904e\u4f4d\u5740\u6307\u5b9a\u53ea\u66f4\u65b0\u5fc5\u8981\u4f4d\u7f6e\uff0c\u56e0\u6b64\u975e\u5e38\u9069\u5408\u7528\u65bclog header\u66f4\u65b0\u3001\u5c0f\u578bmetadata\u8ffd\u52a0\u7b49\u7528\u9014\u3002<\/p>\n\n\n\n

\u8207Flash\u4e0d\u540c\uff0cFeRAM\u8f03\u4e0d\u53d7erase block\u908a\u754c\u9650\u5236\uff0c\u80fd\u7dad\u6301\u8f03\u5c0f\u7684\u5beb\u5165\u55ae\u4f4d\u3002\u6b64\u5916\uff0c\u5beb\u5165\u6642\u9593\u7a69\u5b9a\uff0c\u4e5f\u6709\u52a9\u65bc\u4f30\u7b97\u9031\u671f\u63a7\u5236\u4e2d\u7684\u8655\u7406\u6642\u9593\u3002
\u56e0\u6b64\uff0c\u5728\u8a2d\u8a08\u4e0a\uff0c\u5c07\u8a18\u9304\u8655\u7406\u653e\u5728\u63a5\u8fd1interrupt\u7684\u4f4d\u7f6e\uff0c\u6216\u5728\u77ed\u9031\u671fsampling\u4e2d\u76f4\u63a5\u5beb\u5165FRAM\uff0c\u90fd\u6703\u8b8a\u5f97\u66f4\u52a0\u73fe\u5be6\u3002<\/p>\n\n\n\n

\u9ad8\u901f\u5beb\u5165\u8207\u9ad8\u8010\u4e45\u6027\u5c0d\u8a2d\u8a08\u7684\u5f71\u97ff<\/h3>\n\n\n\n

\u9ad8\u901f\u5beb\u5165\u4e0d\u53ea\u662f\u6e1b\u5c11log\u5ef6\u9072\uff0c\u4e5f\u6703\u6539\u8b8a\u6574\u9ad4\u7cfb\u7d71\u7d50\u69cb\u3002\u9996\u5148\uff0c\u8a2d\u8a08\u601d\u8def\u53ef\u4ee5\u5f9e\u300c\u6e96\u5099\u5927\u578bbuffer\u5438\u6536\u5cf0\u503c\u300d\u8f49\u5411\u300c\u6bcf\u6b21sample\u5230\u9054\u6642\uff0c\u4ee5\u5c0f\u7c92\u5ea6\u7acb\u5373\u78ba\u5b9a\u5beb\u5165\u300d\u3002<\/p>\n\n\n\n

\u5176\u6b21\uff0cFRAM\u7684\u9ad8\u8010\u4e45\u6027\u53ef\u7c21\u5316\u70ba\u4e86\u5e73\u5747\u58fd\u547d\u800c\u8a2d\u8a08\u7684\u5beb\u5165\u5206\u6563\u8207\u56de\u6536\u8655\u7406\uff0c\u4e5f\u8b93metadata\u80fd\u66f4\u983b\u7e41\u66f4\u65b0\u3002
\u4f8b\u5982\uff0cring log\u7684header\u66f4\u65b0\uff0c\u6216\u7528\u65bc\u6545\u969c\u5fa9\u539f\u7684\u4e16\u4ee3\u7de8\u865f\u66f4\u65b0\uff0c\u90fd\u53ef\u4ee5\u66f4\u504f\u5411\u5b89\u5168\u5074\u9032\u884c\u3002<\/p>\n\n\n\n

\u7d50\u679c\u662f\uff0c\u7cfb\u7d71\u53ef\u4ee5\u900f\u904e\u55ae\u7d14\u7684\u8ffd\u52a0\u5beb\u5165\u8207\u660e\u78ba\u7684commit\u9ede\uff0c\u8f03\u5bb9\u6613\u5efa\u7acb\u5805\u56fa\u53ef\u9760\u7684\u8cc7\u6599\u8a18\u9304\u67b6\u69cb\u3002<\/p>\n\n\n\n

\u60f3\u4e86\u89e3 FeRAM \u662f\u5426\u9069\u5408\u60a8\u7684\u8cc7\u6599\u8a18\u9304\u8a2d\u8a08\u55ce\uff1f<\/strong>
\u82e5\u60a8\u6b63\u5728\u8a55\u4f30\u983b\u7e41\u5beb\u5165\u3001\u8cc7\u6599\u4fdd\u5b58\u3001\u65b7\u96fb\u5c0d\u7b56\u6216\u9ad8\u53ef\u9760\u6027\u7684\u8cc7\u6599\u8a18\u9304\u8a2d\u8a08\uff0c\u6b61\u8fce\u8207\u6211\u5011\u806f\u7e6b\u3002\u6211\u5011\u53ef\u4f9d\u7167\u60a8\u7684\u61c9\u7528\u9700\u6c42\uff0c\u63d0\u4f9b FeRAM \u5c0e\u5165\u8207\u7522\u54c1\u9078\u578b\u76f8\u95dc\u8cc7\u8a0a\u3002<\/p>\n\n\n\n

\n \n \n \u8aee\u8a62 FeRAM \u61c9\u7528\u8207\u7522\u54c1\n <\/a>\n <\/strong>\n<\/p>\n\n\n\n

\u5c0d\u4f4e\u529f\u8017\u8207\u5373\u6642\u8655\u7406\u7684\u8ca2\u737b<\/h3>\n\n\n\n

\u5728\u8cc7\u6599\u8a18\u9304\u8a2d\u8a08\u4e2d\uff0c\u5beb\u5165\u529f\u8017\u8207\u559a\u9192\u6642\u9593\u6703\u76f4\u63a5\u5f71\u97ff\u96fb\u6c60\u58fd\u547d\u3002FRAM\u4e0d\u9700\u8981erase\u6d41\u7a0b\uff0c\u56e0\u6b64\u8f03\u5bb9\u6613\u6291\u5236\u5beb\u5165\u6642\u7684\u5cf0\u503c\u96fb\u6d41\u8207\u7b49\u5f85\u6642\u9593\uff0c\u9069\u5408\u8a2d\u8a08\u6210\u77ed\u6642\u9593\u5b8c\u6210\u8a18\u9304\u5f8c\u7acb\u5373\u56de\u5230sleep\u6a21\u5f0f\u3002<\/p>\n\n\n\n

\u6b64\u5916\uff0c\u5982\u679c\u5beb\u5165\u5b8c\u6210\u7b49\u5f85\u6642\u9593\u904e\u9577\uff0ctask\u5207\u63db\u6703\u589e\u52a0\uff0c\u5c0e\u81f4\u5373\u6642\u6027\u8207\u529f\u8017\u8868\u73fe\u540c\u6642\u60e1\u5316\u3002\u4f7f\u7528FRAM\u6642\uff0c\u7b49\u5f85\u6642\u9593\u8f03\u5bb9\u6613\u9810\u4f30\uff0c\u56e0\u6b64\u7cfb\u7d71\u8a2d\u8a08\u4e5f\u66f4\u7a69\u5b9a\u3002
\u518d\u8005\uff0c\u96fb\u6e90\u4e2d\u65b7\u6642\uff0c\u5df2\u5beb\u5165FeRAM\u7684\u8cc7\u6599\u53ef\u88ab\u4fdd\u7559\uff0c\u9019\u4e5f\u53ef\u80fd\u7e2e\u77ed\u5fc5\u9808\u900f\u904esupercapacitor\u7b49\u5143\u4ef6\u7dad\u6301\u7684\u5099\u63f4\u6642\u9593\uff0c\u63d0\u9ad8\u96fb\u6e90\u8a2d\u8a08\u7684\u81ea\u7531\u5ea6\u3002<\/p>\n\n\n\n

\u7d50\u679c\u4f86\u770b\uff0c\u4f7f\u7528FRAM\u53ef\u8b93\u7cfb\u7d71\u66f4\u5bb9\u6613\u900f\u904e\u55ae\u7d14\u7684\u9031\u671f\u8655\u7406\u6eff\u8db3\u8cc7\u6599\u8a18\u9304\u9700\u6c42\u3002<\/p>\n\n\n\n

\u6d3b\u7528FRAM\u7684\u7121\u7de9\u885d\u8cc7\u6599\u7d50\u69cb\u8a2d\u8a08<\/h2>\n\n\n\n

\u7121\u7de9\u885d\u8a2d\u8a08\u7684\u6838\u5fc3\u6982\u5ff5\uff0c\u662f\u4e0d\u8981\u8b93\u8cc7\u6599\u9577\u6642\u9593\u505c\u7559\u5728RAM\u4e2d\uff0c\u800c\u662f\u5728\u53d6\u5f97\u8cc7\u6599\u5f8c\uff0c\u4ee5\u5c0f\u55ae\u4f4d\u5c07\u8cc7\u6599\u78ba\u5b9a\u4fdd\u5b58\u5230\u975e\u63ee\u767c\u6027\u8a18\u61b6\u9ad4\u4e2d\u3002
\u5229\u7528FRAM\u7684\u7279\u6027\uff0c\u5373\u4f7f\u964d\u4f4e\u8ffd\u52a0\u5beb\u5165\u7684\u7c92\u5ea6\uff0c\u5c0d\u6027\u80fd\u8207\u58fd\u547d\u7684\u5f71\u97ff\u4e5f\u8f03\u5c0f\uff0c\u56e0\u6b64\u8a2d\u8a08\u91cd\u9ede\u53ef\u4ee5\u96c6\u4e2d\u5728\u8cc7\u6599\u4e00\u81f4\u6027\u8207\u5fa9\u539f\u6027\u4e0a\u3002<\/p>\n\n\n\n

\u5177\u9ad4\u800c\u8a00\uff0c\u53ef\u7d50\u5408append log\u3001\u8f15\u91cfheader\u3001commit marker\uff0c\u4ee5\u53ca\u555f\u52d5\u6642\u6383\u63cf\u5fa9\u539f\u7b49\u65b9\u5f0f\uff0c\u5efa\u7acb\u5373\u4f7f\u767c\u751f\u96fb\u6e90\u4e2d\u65b7\u4e5f\u4e0d\u5bb9\u6613\u640d\u58de\u7684\u6700\u5c0f\u72c0\u614b\u8cc7\u6599\u7d50\u69cb\u3002<\/p>\n\n\n\n

\u4ec0\u9ebc\u662f\u7121\u7de9\u885d\u8a2d\u8a08\uff1a\u6982\u5ff5\u8207\u67b6\u69cb<\/h3>\n\n\n\n

\u9019\u88e1\u6240\u8aaa\u7684\u7121\u7de9\u885d\uff0c\u4e26\u4e0d\u662f\u5b8c\u5168\u4e0d\u4f7f\u7528\u4efb\u4f55RAM buffer\uff0c\u800c\u662f\u6307\u4e0d\u4ee5\u524d\u63d0\u4e0a\u6e96\u5099\u5927\u578bRAM\u66ab\u5b58\u5340\u4f86\u7b49\u5f85\u4fdd\u5b58\u3002\u57fa\u672c\u67b6\u69cb\u662f\uff0c\u5728\u53d6\u5f97\u8cc7\u6599\u5f8c\u7acb\u5373\u8ffd\u52a0\u5beb\u5165FRAM\uff0c\u5f8c\u7e8c\u8655\u7406\u5247\u8996\u9700\u8981\u4ea4\u7531\u53e6\u4e00\u500b\u8b80\u53d6task\u57f7\u884c\u3002<\/p>\n\n\n\n

\u5f9e\u67b6\u69cb\u4f86\u770b\uff0c\u8f03\u5bb9\u6613\u7406\u89e3\u7684\u505a\u6cd5\u662f\u4f9d\u5e8f\u5beb\u5165\u56fa\u5b9a\u9577\u5ea6record\uff0c\u5728record\u672b\u5c3e\u52a0\u5165\u7528\u65bc\u4e00\u81f4\u6027\u6aa2\u67e5\u7684CRC\uff0c\u6700\u5f8c\u518d\u66f4\u65b0commit byte\u3002
\u5982\u6b64\u4e00\u4f86\uff0c\u5373\u4f7f\u5728\u5beb\u5165\u9014\u4e2d\u767c\u751f\u96fb\u6e90\u4e2d\u65b7\uff0c\u4e5f\u53ea\u9700\u8981\u5c07commit\u672a\u5b8c\u6210\u7684record\u8996\u70ba\u7121\u6548\u3002<\/p>\n\n\n\n

\u9019\u7a2e\u8a2d\u8a08\u53ef\u5c07\u7cfb\u7d71\u72c0\u614b\u6578\u91cf\u964d\u5230\u6700\u4f4e\uff0c\u4e5f\u80fd\u964d\u4f4e\u8cc7\u6599\u5fa9\u539f\u6642\u7684\u5224\u65b7\u8907\u96dc\u5ea6\u3002<\/p>\n\n\n\n

Sequential log\u7d50\u69cb\u8207pointer\u7ba1\u7406\u65b9\u6cd5<\/h3>\n\n\n\n

\u5be6\u4f5c\u4e0a\u7684\u95dc\u9375\uff0c\u5728\u65bc\u5982\u4f55\u7ba1\u7406\u8868\u793a\u5beb\u5165\u4f4d\u7f6e\u7684pointer\uff0c\u4ee5\u53calog\u6709\u6548\u7bc4\u570d\u7684\u8cc7\u8a0a\u3002\u8f03\u5efa\u8b70\u7684\u65b9\u5f0f\uff0c\u662f\u5728\u8cc7\u6599\u5340\u57df\u4e4b\u5916\u8a2d\u7f6e\u5c0f\u578b\u7ba1\u7406\u5340\u57df\uff0c\u4e26\u4ee5\u5e36\u6709\u4e16\u4ee3\u7de8\u865f\u7684pointer record\u4ea4\u66ff\u5beb\u5165\uff0c\u5f62\u6210\u96d9\u91cd\u5316\u7d50\u69cb\u3002<\/p>\n\n\n\n

\u555f\u52d5\u6642\uff0c\u7cfb\u7d71\u6703\u6383\u63cf\u7ba1\u7406\u5340\u57df\uff0c\u9078\u64c7\u6700\u65b0\u4e16\u4ee3\u7684pointer\uff0c\u518d\u5f9e\u8a72\u4f4d\u7f6e\u958b\u59cb\u6aa2\u67e5\u8cc7\u6599\u5340\u57df\u3002
\u8cc7\u6599\u672c\u9ad4\u82e5\u63a1\u7528\u56fa\u5b9a\u9577\u5ea6\uff0c\u6383\u63cf\u901f\u5ea6\u6703\u8f03\u5feb\uff1b\u82e5\u63a1\u7528\u53ef\u8b8a\u9577\u5ea6\uff0c\u5247\u5fc5\u9808\u5305\u542blength\u8207CRC\u3002<\/p>\n\n\n\n

\u7531\u65bcFRAM\u5c0d\u7ba1\u7406\u5340\u57df\u7684\u9ad8\u983b\u7387\u66f4\u65b0\u8ca0\u64d4\u8f03\u5c0f\uff0c\u56e0\u6b64\u53ef\u63d0\u9ad8\u7ba1\u7406\u8cc7\u8a0a\u66f4\u65b0\u983b\u7387\uff0c\u5efa\u7acb\u66f4\u8010\u96fb\u6e90\u4e2d\u65b7\u7684\u904b\u4f5c\u65b9\u5f0f\u3002<\/p>\n\n\n\n

\u5be6\u4f5c\u4e0a\u7684\u8a2d\u8a08\u91cd\u9ede\u8207\u6ce8\u610f\u4e8b\u9805<\/h3>\n\n\n\n

\u5be6\u4f5c\u6642\u6700\u91cd\u8981\u7684\u662fatomic\u6027\u8207\u5beb\u5165\u9806\u5e8f\u3002\u57fa\u672c\u6d41\u7a0b\u61c9\u7d71\u4e00\u70ba\uff1a\u5148\u5beb\u5165record\u672c\u6587\uff0c\u518d\u78ba\u5b9a\u5305\u542bCRC\u8207length\u7684header\uff0c\u6700\u5f8c\u66f4\u65b0commit marker\u3002<\/p>\n\n\n\n

\u5176\u6b21\uff0cpointer\u66f4\u65b0\u61c9\u653e\u5728\u8cc7\u6599\u5beb\u5165\u4e4b\u5f8c\uff0c\u907f\u514d\u51fa\u73fepointer\u5df2\u7d93\u524d\u9032\uff0c\u4f46\u5be6\u969b\u8cc7\u6599\u5c1a\u672a\u5b58\u5728\u7684\u72c0\u614b\u3002
\u53e6\u5916\uff0c\u70ba\u4e86\u907f\u514d\u540c\u4e00\u4f4d\u5740\u767c\u751f\u96c6\u4e2d\u591a\u6b21\u5beb\u5165\uff0c\u7ba1\u7406\u5340\u57df\u4e5f\u5efa\u8b70\u63a1\u7528append-only\u65b9\u5f0f\uff0c\u4e26\u900f\u904e\u4e16\u4ee3\u7de8\u865f\u9078\u51fa\u6709\u6548\u8cc7\u6599\u3002<\/p>\n\n\n\n

\u8a2d\u8a08\u5b8c\u6210\u5f8c\uff0c\u5fc5\u9808\u9032\u884c\u96fb\u58d3\u4e0b\u964d\u9014\u4e2d\u65b7\u96fb\u6e2c\u8a66\uff0c\u78ba\u8a8d\u555f\u52d5\u6642\u6383\u63cf\u6d41\u7a0b\u4e00\u5b9a\u80fd\u505c\u6b62\uff0c\u4e14\u4e0d\u6703\u9677\u5165\u7121\u6cd5\u5224\u65b7\u7684\u72c0\u614b\u3002<\/p>\n\n\n\n

FRAM\u7121\u7de9\u885dlog\u8a2d\u8a08\u7684\u5be6\u52d9\u6307\u5f15<\/h2>\n\n\n\n

\u8a2d\u8a08\u5224\u65b7\u9700\u8981\u6839\u64da\u8a18\u9304\u9031\u671f\u3001\u53ef\u5bb9\u8a31\u8cc7\u6599\u7f3a\u6f0f\u3001\u96fb\u6e90\u4e2d\u65b7\u983b\u7387\u3001\u529f\u8017\u8207\u5be6\u4f5c\u5de5\u6642\u4e4b\u9593\u7684trade-off\u4f86\u9032\u884c\u3002
FRAM\u6709\u52a9\u65bc\u540c\u6642\u5be6\u73febuffer\u524a\u6e1b\u8207\u5fa9\u539f\u6027\u63d0\u5347\uff0c\u4f46\u4e5f\u9700\u8981\u8003\u91cf\u5bb9\u91cf\u3001\u55ae\u50f9\u8207\u4ecb\u9762\u901f\u5ea6\u7b49\u9650\u5236\u3002<\/p>\n\n\n\n

\u672c\u7ae0\u91cd\u9ede\u5728\u65bc\u5b9a\u91cf\u5316buffer\u524a\u6e1b\u6548\u679c\uff0c\u5224\u65b7\u9069\u7528\u9818\u57df\uff0c\u4e26\u6574\u7406\u5be6\u4f5c\u524d\u61c9\u5148\u78ba\u8a8d\u7684\u6aa2\u67e5\u9805\u76ee\u3002<\/p>\n\n\n\n

RAM\u4f7f\u7528\u91cf\u524a\u6e1b\u8207\u8edf\u9ad4\u7d50\u69cb\u7c21\u5316\u7684\u6548\u679c<\/h3>\n\n\n\n

\u7121\u7de9\u885d\u5316\u7684\u6548\u679c\u4e0d\u53ea\u5728\u65bc\u6e1b\u5c11RAM\u4f7f\u7528\u91cf\u3002\u7531\u65bc\u72c0\u614b\u6a5f\u8b8a\u5f97\u66f4\u7c21\u55ae\uff0c\u7af6\u5408\u8207\u8cc7\u6599\u907a\u5931\u7684\u539f\u56e0\u4e5f\u6703\u6e1b\u5c11\uff0creview\u8207\u9a57\u8b49\u8ca0\u64d4\u53ef\u96a8\u4e4b\u964d\u4f4e\u3002<\/p>\n\n\n\n

\u4f8b\u5982\uff0c\u904e\u53bb\u591a\u6bb5buffer\u8655\u7406\u7684\u67b6\u69cb\uff0c\u53ef\u7c21\u5316\u70ba\u53d6\u5f97\u3001\u8ffd\u52a0\u5beb\u5165\u3001commit\u4e09\u500b\u4e3b\u8981\u968e\u6bb5\u3002
\u9019\u6709\u52a9\u65bc\u7e2e\u77edinterrupt disable\u5340\u9593\uff0c\u4e5f\u80fd\u6e1b\u5c11timestamp\u504f\u79fb\u8207jitter\u3002<\/p>\n\n\n\n

\u53e6\u4e00\u65b9\u9762\uff0c\u4e5f\u9700\u8981\u4f30\u7b97\u555f\u52d5\u6642\u6383\u63cf\u5fa9\u539f\u6240\u9700\u6642\u9593\u662f\u5426\u7b26\u5408\u7cfb\u7d71\u8981\u6c42\u3002\u5fc5\u8981\u6642\uff0c\u53ef\u5b9a\u671f\u5efa\u7acbsnapshot\uff0c\u4ee5\u7e2e\u77ed\u5fa9\u539f\u6642\u9593\u4e26\u964d\u4f4e\u6383\u63cf\u8ca0\u64d4\u3002<\/p>\n\n\n\n

\u5728\u5de5\u696d\u8a2d\u5099\u8207IoT\u8a2d\u5099\u4e2d\u7684\u9069\u7528\u5224\u65b7\u6a19\u6e96<\/h3>\n\n\n\n

\u5224\u65b7\u662f\u5426\u9069\u5408\u5c0e\u5165FRAM\u6642\uff0c\u9996\u5148\u61c9\u4ee5\u5beb\u5165\u983b\u7387\u8207\u96fb\u6e90\u4e2d\u65b7\u98a8\u96aa\u70ba\u4e3b\u8981\u8ef8\u7dda\u3002
\u8d8a\u662f\u9700\u8981\u983b\u7e41\u4fdd\u5b58log\uff0c\u4e14\u73fe\u5834\u53ef\u80fd\u767c\u751f\u96fb\u6e90\u4e2d\u65b7\u7684\u8a2d\u5099\uff0c\u8d8a\u80fd\u767c\u63eeappend-only\u5373\u6642\u78ba\u5b9a\u5beb\u5165\u7684\u50f9\u503c\u3002<\/p>\n\n\n\n

\u6b64\u5916\uff0c\u5728\u901a\u8a0a\u4e0d\u7a69\u5b9a\u3001\u5fc5\u9808\u9032\u884clocal\u4fdd\u5b58\u7684IoT\u7d42\u7aef\u4e2d\uff0clog\u4e00\u81f4\u6027\u4e5f\u975e\u5e38\u91cd\u8981\u3002
\u82e5\u7528\u9014\u662f\u4ee5\u4f4e\u6210\u672c\u9577\u671f\u4fdd\u5b58\u5de8\u5927\u5bb9\u91cf\u8cc7\u6599\uff0c\u5247\u8207\u5176\u4ed6\u5132\u5b58\u5a92\u9ad4\u642d\u914d\u7684\u4e8c\u5c64\u67b6\u69cb\u6703\u66f4\u5be6\u969b\u3002<\/p>\n\n\n\n

\u4f8b\u5982\uff0c\u53ef\u5c07FeRAM\u7528\u4f5c\u4e00\u6b21log\u5340\u57df\uff0c\u5148\u5feb\u901f\u4fdd\u5b58\u91cd\u8981\u8cc7\u6599\uff0c\u518d\u4ee5\u8f03\u5927\u55ae\u4f4d\u8f49\u5b58\u5230\u5176\u4ed6\u5a92\u9ad4\u3002\u9019\u6a23\u80fd\u517c\u9867\u5373\u6642\u6027\u3001\u53ef\u9760\u6027\u8207\u5bb9\u91cf\u6210\u672c\u3002<\/p>\n\n\n\n

\u5be6\u73fe\u9ad8\u53ef\u9760log\u8a2d\u8a08\u7684\u6aa2\u67e5\u91cd\u9ede<\/h3>\n\n\n\n

\u958b\u59cb\u8a2d\u8a08\u524d\uff0c\u61c9\u5148\u78ba\u8a8d\u4e09\u500b\u91cd\u9ede\u3002\u7b2c\u4e00\uff0c\u5c07\u5fa9\u539f\u6d41\u7a0b\u898f\u683c\u5316\u3002\u7b2c\u4e8c\uff0c\u56fa\u5b9a\u5beb\u5165\u9806\u5e8f\u8207\u96d9\u91cd\u5316\u65b9\u91dd\u3002\u7b2c\u4e09\uff0c\u8a2d\u8a08\u5b8c\u6574\u7684\u6e2c\u8a66\u689d\u4ef6\u3002<\/p>\n\n\n\n

\u6e2c\u8a66\u6642\uff0c\u9700\u8981\u7d44\u5408\u96fb\u6e90\u4e2d\u65b7\u6642\u7684\u96fb\u58d3\u4e0b\u964d\u659c\u7387\u3001\u6eab\u5ea6\u3001bus\u901f\u5ea6\u8207interrupt\u8ca0\u8f09\uff0c\u78ba\u8a8d\u5728\u6700\u58de\u689d\u4ef6\u4e0b\u7cfb\u7d71\u4e5f\u4e0d\u6703\u7834\u7dbb\u3002
\u6b64\u5916\uff0c\u4e5f\u8981\u4e8b\u5148\u5b9a\u7fa9log\u6eff\u8f09\u6642\u7684\u8986\u5beb\u7b56\u7565\uff0c\u4ee5\u53ca\u7570\u5e38reset\u5f8c\u7684\u91cd\u65b0\u958b\u59cb\u9ede\u3002<\/p>\n\n\n\n

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\n \n \n FeRAM \u6280\u8853\u8aee\u8a62\n <\/a>\n <\/strong>\n<\/p>\n\n\n\n


RAMXEED\u63d0\u4f9b\u7684FeRAM\u7522\u54c1\u5217\u8868
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