\n| RTOS \u5806<\/td>\n | FreeRTOS Heap<\/td>\n | \u4efb\u52a1\u3001\u961f\u5217\u3001\u4fe1\u53f7\u91cf\u7b49\u52a8\u6001\u5bf9\u8c61<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n.data \u533a<\/h5>\nuint32_t system_clock = 120000000;
\nstatic int retry_count = 3;<\/p>\n \u8fd9\u4e9b\u53d8\u91cf\u53ef\u5728\u8fd0\u884c\u65f6\u4fee\u6539，\u56e0\u6b64\u8fd0\u884c\u5730\u5740\u5728 SRAM\u3002\u4f46\u521d\u59cb\u503c\u9700\u8981\u968f\u56fa\u4ef6\u4fdd\u5b58，\u6240\u4ee5\u955c\u50cf\u4e2d\u8fd8\u4f1a\u5728 Flash \u4fdd\u5b58\u4e00\u4efd\u521d\u59cb\u503c，\u542f\u52a8\u65f6\u7531 C \u8fd0\u884c\u5e93\u590d\u5236\u5230 SRAM\u3002<\/p>\n Flash \u4e2d\u7684\u521d\u59cb\u503c \u2192 \u542f\u52a8\u65f6\u590d\u5236 \u2192 SRAM \u4e2d\u7684\u8fd0\u884c<\/p>\n .bss\/ZI \u533a<\/h5>\nstatic uint8_t rx_buffer[256];
\nstatic device_state_t state;<\/p>\n \u8fd9\u7c7b\u53d8\u91cf\u6ca1\u6709\u663e\u5f0f\u521d\u503c，\u542f\u52a8\u65f6\u7531\u7cfb\u7edf\u6e05\u96f6，\u653e\u5728 SRAM \u7684 .bss \u6216 ZI \u533a\u3002<\/p>\n \u6808 Stack<\/h5>\n\u51fd\u6570\u4e2d\u7684\u5c40\u90e8\u53d8\u91cf\u901a\u5e38\u4f7f\u7528\u6808：<\/p>\n void protocol_task(void *arg)
\n{
\n \u00a0 \u00a0uint8_t frame[128];
\n \u00a0 \u00a0uint32_t timeout;
\n}<\/p>\n \u6808\u8fd8\u4fdd\u5b58\u51fd\u6570\u8fd4\u56de\u5730\u5740\u3001\u5bc4\u5b58\u5668\u73b0\u573a\u548c\u4e2d\u65ad\u73b0\u573a\u3002Cortex-M \u7684\u4e3b\u6808\u901a\u5e38\u4ece\u9ad8\u5730\u5740\u5411\u4f4e\u5730\u5740\u589e\u957f\u3002<\/p>\n \u5806 Heap<\/h5>\n\u5806\u7528\u4e8e\u8fd0\u884c\u65f6\u52a8\u6001\u7533\u8bf7\u5185\u5b58：<\/p>\n uint8_t *buffer = malloc<\/p>\n \u5728 FreeRTOS \u4e2d，\u4efb\u52a1\u3001\u961f\u5217\u548c\u4e92\u65a5\u9501\u4e5f\u53ef\u80fd\u901a\u8fc7 RTOS \u5806\u52a8\u6001\u521b\u5efa：<\/p>\n xTaskCreate(control_task, "control", 512, NULL, 3, NULL);
\nxQueueCreate(8, sizeof(message_t));
\nxSemaphoreCreateMutex();<\/p>\n \u5982\u679c\u91c7\u7528 xTaskCreateStatic()，\u4efb\u52a1\u63a7\u5236\u5757\u548c\u4efb\u52a1\u6808\u5219\u7531\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u7684\u9759\u6001\u6570\u7ec4\u5360\u7528 SRAM，\u800c\u4e0d\u4f7f\u7528\u52a8\u6001\u5806\u3002<\/p>\n 2.4 \u7247\u5185 EEPROM：\u5e76\u975e\u6240\u6709 MCU \u90fd\u6709<\/h4>\nEEPROM \u662f Electrically Erasable Programmable Read-Only Memory \u7684\u7f29\u5199，\u4e2d\u6587\u4e3a\u201c\u7535\u53ef\u64e6\u9664\u53ef\u7f16\u7a0b\u53ea\u8bfb\u5b58\u50a8\u5668\u201d\u3002\u90e8\u5206 MCU \u96c6\u6210\u5c11\u91cf EEPROM，\u9002\u5408\u4fdd\u5b58：<\/p>\n \n- \n
\u7528\u6237\u914d\u7f6e；<\/p>\n<\/li>\n - \n
\u6821\u51c6\u7cfb\u6570；<\/p>\n<\/li>\n - \n
\u8bbe\u5907\u7f16\u53f7；<\/p>\n<\/li>\n - \n
\u5c11\u91cf\u6389\u7535\u4fdd\u6301\u6570\u636e\u3002<\/p>\n<\/li>\n<\/ul>\n \u6ca1\u6709\u7247\u5185 EEPROM \u65f6，\u5e38\u7528 Flash \u4fdd\u7559\u5206\u533a\u6a21\u62df EEPROM\u3002<\/p>\n 3. MCU \u7684\u7247\u5916\u5b58\u50a8\u5668<\/h3>\n\u7247\u5916\u5b58\u50a8\u5668\u901a\u8fc7 SPI\u3001QSPI\u3001I\u00b2C\u3001SDIO\u3001FMC\/FSMC \u7b49\u63a5\u53e3\u8fde\u63a5 MCU\u3002\u5b83\u4eec\u4e3b\u8981\u7528\u4e8e\u6269\u5c55\u5bb9\u91cf\u3001\u4fdd\u5b58\u5927\u91cf\u6570\u636e\u6216\u63d0\u9ad8\u975e\u6613\u5931\u6570\u636e\u7684\u64e6\u5199\u80fd\u529b\u3002<\/p>\n 3.1 \u5916\u90e8 NOR Flash<\/h4>\nNOR Flash \u662f NOR \u578b\u95ea\u5b58，\u968f\u673a\u8bfb\u53d6\u901f\u5ea6\u8f83\u5feb，\u90e8\u5206 MCU \u652f\u6301\u901a\u8fc7 QSPI \u6620\u5c04\u540e\u76f4\u63a5\u6267\u884c，\u5373 XIP（Execute In Place，\u5c31\u5730\u6267\u884c）\u3002<\/p>\n \u9002\u5408\u5b58\u653e：<\/p>\n \n- \n
OTA \u4e0b\u8f7d\u56fa\u4ef6；<\/p>\n<\/li>\n - \n
\u56fe\u7247\u3001\u5b57\u5e93\u548c\u8bed\u97f3\u8d44\u6e90；<\/p>\n<\/li>\n - \n
\u4e2d\u7b49\u5bb9\u91cf\u65e5\u5fd7；<\/p>\n<\/li>\n - \n
\u6587\u4ef6\u7cfb\u7edf；<\/p>\n<\/li>\n - \n
\u4e0d\u9002\u5408\u653e\u5165\u7247\u5185 Flash \u7684\u7a0b\u5e8f\u6a21\u5757\u3002<\/p>\n<\/li>\n<\/ul>\n 3.2 \u5916\u90e8 NAND Flash<\/h4>\nNAND Flash \u662f NAND \u578b\u95ea\u5b58，\u5bb9\u91cf\u5927\u3001\u6210\u672c\u4f4e，\u4f46\u901a\u5e38\u9700\u8981：<\/p>\n \n- \n
ECC（Error Correcting Code，\u9519\u8bef\u6821\u6b63\u7801）；<\/p>\n<\/li>\n - \n
\u574f\u5757\u7ba1\u7406；<\/p>\n<\/li>\n - \n
\u78e8\u635f\u5747\u8861；<\/p>\n<\/li>\n - \n
\u4e13\u7528\u6587\u4ef6\u7cfb\u7edf\u6216 Flash \u7ba1\u7406\u5c42\u3002<\/p>\n<\/li>\n<\/ul>\n \u9002\u5408\u4fdd\u5b58\u5927\u91cf\u5386\u53f2\u8bb0\u5f55\u3001\u65e5\u5fd7\u548c\u6587\u4ef6\u3002<\/p>\n 3.3 \u5916\u90e8 EEPROM<\/h4>\n\u5916\u90e8 EEPROM \u5e38\u89c1\u4e24\u79cd\u63a5\u53e3：<\/p>\n \n- \n
I\u00b2C EEPROM：I\u00b2C \u662f Inter-Integrated Circuit，\u4e2d\u6587\u4e3a\u201c\u5185\u90e8\u96c6\u6210\u7535\u8def\u603b\u7ebf\u201d；<\/p>\n<\/li>\n - \n
SPI EEPROM：SPI \u662f Serial Peripheral Interface，\u4e2d\u6587\u4e3a\u201c\u4e32\u884c\u5916\u8bbe\u63a5\u53e3\u201d\u3002<\/p>\n<\/li>\n<\/ul>\n \u5b83\u4eec\u5bb9\u91cf\u901a\u5e38\u8f83\u5c0f，\u4f46\u4f7f\u7528\u7b80\u5355，\u9002\u5408\u4fdd\u5b58\u5c11\u91cf\u53c2\u6570\u548c\u6821\u51c6\u503c\u3002<\/p>\n 3.4 FRAM<\/h4>\nFRAM \u662f Ferroelectric Random-Access Memory \u7684\u7f29\u5199，\u4e2d\u6587\u4e3a\u201c\u94c1\u7535\u968f\u673a\u5b58\u53d6\u5b58\u50a8\u5668\u201d\u3002FRAM \u5177\u6709\u975e\u6613\u5931\u3001\u8bfb\u5199\u5feb\u548c\u8010\u5199\u6b21\u6570\u9ad8\u7b49\u7279\u70b9，\u901a\u5e38\u4e0d\u9700\u8981\u50cf Flash \u4e00\u6837\u5148\u64e6\u9664\u3002<\/p>\n \u7279\u522b\u9002\u5408\u4fdd\u5b58\u9891\u7e41\u53d8\u5316\u7684\u6570\u636e：<\/p>\n \n- \n
\u7d2f\u8ba1\u7535\u91cf；<\/p>\n<\/li>\n - \n
\u4ea4\u6613\u8ba1\u6570\u5668；<\/p>\n<\/li>\n - \n
\u6545\u969c\u6b21\u6570；<\/p>\n<\/li>\n - \n
\u9700\u8981\u9891\u7e41\u65ad\u7535\u4fdd\u5b58\u7684\u72b6\u6001\u3002<\/p>\n<\/li>\n<\/ul>\n 3.5 \u5916\u90e8 RAM<\/h4>\n\u5e38\u89c1\u5916\u90e8 RAM \u5305\u62ec：<\/p>\n \n- \n
SRAM：Static Random-Access Memory，\u9759\u6001\u968f\u673a\u5b58\u53d6\u5b58\u50a8\u5668；<\/p>\n<\/li>\n - \n
PSRAM：Pseudo Static RAM，\u4f2a\u9759\u6001\u968f\u673a\u5b58\u53d6\u5b58\u50a8\u5668；<\/p>\n<\/li>\n - \n
SDRAM：Synchronous Dynamic RAM，\u540c\u6b65\u52a8\u6001\u968f\u673a\u5b58\u53d6\u5b58\u50a8\u5668；<\/p>\n<\/li>\n - \n
DDR：Double Data Rate，\u53cc\u500d\u6570\u636e\u901f\u7387\u5b58\u50a8\u5668\u3002<\/p>\n<\/li>\n<\/ul>\n \u8fd9\u4e9b\u5b58\u50a8\u5668\u90fd\u662f\u6613\u5931\u6027\u7684，\u9002\u5408\u4fdd\u5b58：<\/p>\n \n- \n
\u5927\u578b\u901a\u4fe1\u7f13\u51b2\u533a；<\/p>\n<\/li>\n - \n
\u56fe\u50cf\u548c\u97f3\u9891\u7f13\u5b58；<\/p>\n<\/li>\n - \n
\u5927\u578b\u534f\u8bae\u6808\u6570\u636e；<\/p>\n<\/li>\n - \n
\u5185\u90e8 SRAM \u4e0d\u8db3\u65f6\u7684\u8fd0\u884c\u65f6\u6570\u636e\u3002<\/p>\n<\/li>\n<\/ul>\n 3.6 SD \u5361\u548c eMMC<\/h4>\n\n- \n
SD：Secure Digital，\u5b89\u5168\u6570\u5b57\u5b58\u50a8\u5361；<\/p>\n<\/li>\n - \n
eMMC：embedded MultiMediaCard，\u5d4c\u5165\u5f0f\u591a\u5a92\u4f53\u5361\u3002<\/p>\n<\/li>\n<\/ul>\n \u5b83\u4eec\u5bb9\u91cf\u5927，\u901a\u5e38\u901a\u8fc7\u6587\u4ef6\u7cfb\u7edf\u8bbf\u95ee，\u9002\u5408\u5b58\u653e：<\/p>\n \n- \n
\u5145\u7535\u8ba2\u5355；<\/p>\n<\/li>\n - \n
\u957f\u671f\u5386\u53f2\u8bb0\u5f55；<\/p>\n<\/li>\n - \n
\u8fd0\u884c\u65e5\u5fd7；<\/p>\n<\/li>\n - \n
\u591a\u4e2a OTA \u5347\u7ea7\u5305；<\/p>\n<\/li>\n - \n
\u914d\u7f6e\u6587\u4ef6\u548c\u62a5\u8868\u3002<\/p>\n<\/li>\n<\/ul>\n \u4f7f\u7528\u65f6\u5fc5\u987b\u8003\u8651\u65ad\u7535\u4fdd\u62a4\u3001\u6587\u4ef6\u7cfb\u7edf\u4e00\u81f4\u6027\u3001\u5199\u653e\u5927\u548c\u78e8\u635f\u95ee\u9898\u3002<\/p>\n \n4. C \u4ee3\u7801\u5bf9\u8c61\u4e0e\u5b58\u50a8\u5668\u7684\u5bf9\u5e94\u5173\u7cfb<\/h3>\n\nC \u4ee3\u7801\u5bf9\u8c61\u5e38\u89c1\u5b58\u50a8\u4f4d\u7f6e\u8bf4\u660e<\/tr>\n \n\n| \u51fd\u6570<\/td>\n | \u7247\u5185 Flash<\/td>\n | \u7f16\u8bd1\u4e3a\u673a\u5668\u7801\u540e\u6267\u884c<\/td>\n<\/tr>\n | \n| \u5b57\u7b26\u4e32\u5e38\u91cf<\/td>\n | Flash \u53ea\u8bfb\u533a<\/td>\n | \u4f8b\u5982 "OK"<\/td>\n<\/tr>\n | \n| const \u5168\u5c40\u6570\u7ec4<\/td>\n | Flash \u53ea\u8bfb\u533a<\/td>\n | \u8fd0\u884c\u65f6\u4e0d\u4fee\u6539<\/td>\n<\/tr>\n | \n| \u6709\u521d\u503c\u7684\u5168\u5c40\u53d8\u91cf<\/td>\n | SRAM .data<\/td>\n | \u521d\u59cb\u503c\u955c\u50cf\u5728 Flash<\/td>\n<\/tr>\n | \n| \u65e0\u521d\u503c\u7684\u5168\u5c40\u53d8\u91cf<\/td>\n | SRAM .bss\/ZI<\/td>\n | \u542f\u52a8\u65f6\u6e05\u96f6<\/td>\n<\/tr>\n | \n| \u9759\u6001\u53d8\u91cf<\/td>\n | .data \u6216 .bss<\/td>\n | \u7531\u662f\u5426\u6709\u521d\u503c\u51b3\u5b9a<\/td>\n<\/tr>\n | \n| \u81ea\u52a8\u5c40\u90e8\u53d8\u91cf<\/td>\n | \u5f53\u524d\u4efb\u52a1\u6808<\/td>\n | \u8fdb\u5165\u51fd\u6570\u65f6\u5206\u914d<\/td>\n<\/tr>\n | \n| malloc() \u5185\u5b58<\/td>\n | SRAM \u5806<\/td>\n | \u8fd0\u884c\u65f6\u52a8\u6001\u7533\u8bf7<\/td>\n<\/tr>\n | \n| FreeRTOS \u52a8\u6001\u4efb\u52a1<\/td>\n | FreeRTOS \u5806<\/td>\n | TCB \u548c\u4efb\u52a1\u6808\u90fd\u5360 SRAM<\/td>\n<\/tr>\n | \n| \u5916\u8bbe\u5bc4\u5b58\u5668<\/td>\n | \u5916\u8bbe\u5730\u5740\u7a7a\u95f4<\/td>\n | \u4e0d\u662f\u666e\u901a SRAM \u6216 Flash<\/td>\n<\/tr>\n | \n| \u6389\u7535\u914d\u7f6e<\/td>\n | EEPROM\u3001FRAM \u6216 Flash \u5206\u533a<\/td>\n | \u9700\u8981\u9a71\u52a8\u8bfb\u5199<\/td>\n<\/tr>\n | \n| \u5927\u5bb9\u91cf\u65e5\u5fd7<\/td>\n | \u5916\u90e8 NOR\/NAND\u3001SD\u3001eMMC<\/td>\n | \u9700\u8981\u6587\u4ef6\u7cfb\u7edf\u6216\u5b58\u50a8\u7ba1\u7406<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n5. \u5e38\u89c1\u82f1\u6587\u7f29\u5199\u901f\u67e5<\/h3>\n\n\u7f29\u5199\u82f1\u6587\u5168\u79f0\u4e2d\u6587\u542b\u4e49<\/tr>\n \n\n| MCU<\/td>\n | Microcontroller Unit<\/td>\n | \u5fae\u63a7\u5236\u5668<\/td>\n<\/tr>\n | \n| ROM<\/td>\n | Read-Only Memory<\/td>\n | \u53ea\u8bfb\u5b58\u50a8\u5668<\/td>\n<\/tr>\n | \n| RAM<\/td>\n | Random-Access Memory<\/td>\n | \u968f\u673a\u5b58\u53d6\u5b58\u50a8\u5668<\/td>\n<\/tr>\n | \n| SRAM<\/td>\n | Static Random-Access Memory<\/td>\n | \u9759\u6001\u968f\u673a\u5b58\u53d6\u5b58\u50a8\u5668<\/td>\n<\/tr>\n | \n| DRAM<\/td>\n | Dynamic Random-Access Memory<\/td>\n | \u52a8\u6001\u968f\u673a\u5b58\u53d6\u5b58\u50a8\u5668<\/td>\n<\/tr>\n | \n| Flash<\/td>\n | Flash Memory<\/td>\n | \u95ea\u5b58<\/td>\n<\/tr>\n | \n| EEPROM<\/td>\n | Electrically Erasable Programmable ROM<\/td>\n | \u7535\u53ef\u64e6\u9664\u53ef\u7f16\u7a0b\u53ea\u8bfb\u5b58\u50a8\u5668<\/td>\n<\/tr>\n | \n| FRAM<\/td>\n | Ferroelectric RAM<\/td>\n | \u94c1\u7535\u968f\u673a\u5b58\u53d6\u5b58\u50a8\u5668<\/td>\n<\/tr>\n | \n| NOR<\/td>\n | NOR Flash<\/td>\n | NOR \u578b\u95ea\u5b58<\/td>\n<\/tr>\n | \n| NAND<\/td>\n | NAND Flash<\/td>\n | NAND \u578b\u95ea\u5b58<\/td>\n<\/tr>\n | \n| PSRAM<\/td>\n | Pseudo Static RAM<\/td>\n | \u4f2a\u9759\u6001\u968f\u673a\u5b58\u53d6\u5b58\u50a8\u5668<\/td>\n<\/tr>\n | \n| SDRAM<\/td>\n | Synchronous Dynamic RAM<\/td>\n | \u540c\u6b65\u52a8\u6001\u968f\u673a\u5b58\u53d6\u5b58\u50a8\u5668<\/td>\n<\/tr>\n | \n| DDR<\/td>\n | Double Data Rate<\/td>\n | \u53cc\u500d\u6570\u636e\u901f\u7387\u5b58\u50a8\u5668<\/td>\n<\/tr>\n | \n| SD<\/td>\n | Secure Digital<\/td>\n | \u5b89\u5168\u6570\u5b57\u5b58\u50a8\u5361<\/td>\n<\/tr>\n | \n| eMMC<\/td>\n | embedded MultiMediaCard<\/td>\n | \u5d4c\u5165\u5f0f\u591a\u5a92\u4f53\u5361<\/td>\n<\/tr>\n | \n| OTA<\/td>\n | Over-The-Air<\/td>\n | \u7a7a\u4e2d\u5347\u7ea7<\/td>\n<\/tr>\n | \n| XIP<\/td>\n | Execute In Place<\/td>\n | \u5c31\u5730\u6267\u884c<\/td>\n<\/tr>\n | \n| NVM<\/td>\n | Non-Volatile Memory<\/td>\n | \u975e\u6613\u5931\u6027\u5b58\u50a8\u5668<\/td>\n<\/tr>\n | \n| RTOS<\/td>\n | Real-Time Operating System<\/td>\n | \u5b9e\u65f6\u64cd\u4f5c\u7cfb\u7edf<\/td>\n<\/tr>\n | \n| TCB<\/td>\n | Task Control Block<\/td>\n | \u4efb\u52a1\u63a7\u5236\u5757<\/td>\n<\/tr>\n | \n| DMA<\/td>\n | Direct Memory Access<\/td>\n | \u76f4\u63a5\u5b58\u50a8\u5668\u8bbf\u95ee<\/td>\n<\/tr>\n | \n| ECC<\/td>\n | Error Correcting Code<\/td>\n | \u9519\u8bef\u6821\u6b63\u7801<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":" 1. \u4e3a\u4ec0\u4e48\u8981\u533a\u5206\u4e0d\u540c\u5b58\u50a8\u5668MCU 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