在 Microchip Curiosity PIC32MZEF 上下载、构建、刷写并运行 FreeRTOS OTA 演示 - FreeRTOS
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在 Microchip Curiosity PIC32MZEF 上下载、构建、刷写并运行 FreeRTOS OTA 演示

下载 FreeRTOS OTA 演示代码

  1. 浏览至 AWS IoT 控制台,从导航窗格中选择 Software (软件)

  2. FreeRTOS Device Software (Amazon FreeRTOS 设备软件) 下,选择 Configure download (配置下载)

  3. 从软件配置列表中,选择 Connect to AWS IoT - Microchip (连接到 AWS IoT – Microchip)。选择配置名称,而不是 Download (下载) 链接。

  4. Libraries (库) 下,选择 Add another library (添加另一个库),然后选择 OTA Updates (OTA 更新)

  5. Demo projects (演示项目) 下,选择 OTA Update (OTA 更新)

  6. Name required (需要名称) 下,为自定义的 FreeRTOS 软件配置输入名称。

  7. 选择 Create and download (创建并下载)

构建 OTA 更新演示应用程序

  1. 将刚下载的 .zip 文件解压缩。

  2. 按照 FreeRTOS 入门中的说明进行操作,将 aws_demos 项目导入 MPLAB X IDE,为主板配置 AWS IoT 终端节点、Wi-Fi SSID 和密码,以及私有密钥和证书。

  3. 打开 demos/include/aws_ota_codesigner_certificate.h

  4. 将代码签名证书的内容粘贴到 static const char signingcredentialSIGNING_CERTIFICATE_PEM 变量中。采用与 aws_clientcredential_keys.h 相同的格式,每一行必须以换行符 ('\n') 结束,并用引号括起来。

    例如,证书看起来应当如下所示:

    "-----BEGIN CERTIFICATE-----\n" "MIIBXTCCAQOgAwIBAgIJAM4DeybZcTwKMAoGCCqGSM49BAMCMCExHzAdBgNVBAMM\n" "FnRlc3Rf62lnbmVyQGFtYXpvbi5jb20wHhcNMTcxMTAzMTkxODM1WhcNMTgxMTAz\n" "MTkxODM2WjAhMR8wHQYDVQBBZZZ0ZXN0X3NpZ25lckBhbWF6b24uY29tMFkwEwYH\n" "KoZIzj0CAQYIKoZIzj0DAQcDQgAERavZfvwL1X+E4dIF7dbkVMUn4IrJ1CAsFkc8\n" "gZxPzn683H40XMKltDZPEwr9ng78w9+QYQg7ygnr2stz8yhh06MkMCIwCwYDVR0P\n" "BAQDAgeAMBMGA1UdJQQMMAoGCCsGAQUFBwMDMAoGCCqGSM49BAMCA0gAMEUCIF0R\n" "r5cb7rEUNtWOvGd05MacrgOABfSoVYvBOK9fP63WAqt5h3BaS123coKSGg84twlq\n" "TkO/pV/xEmyZmZdV+HxV/OM=\n" "-----END CERTIFICATE-----\n";
  5. 安装 Python 3 或更高版本。

  6. 运行 pip install pyopenssl 来安装 pyOpenSSL

  7. 复制路径 demos/ota/bootloader/utility/codesigner_cert_utility/ 下 .pem 格式的代码签名证书。重命名证书文件 aws_ota_codesigner_certificate.pem

  8. 打开 freertos/vendors/vendor/boards/board/aws_demos/config_files/aws_demo_config.h,注释掉 #define CONFIG_MQTT_DEMO_ENABLED 并定义 CONFIG_OTA_UPDATE_DEMO_ENABLED

  9. 构建解决方案,并确保其构建没有错误。

  10. 启动终端模拟器,并使用以下设置连接到主板:

    • 波特率:115200

    • 数据位:8

    • 奇偶校验:无

    • 停止位:1

  11. 从主板上拔掉调试器,在主板上运行项目,确认它可以连接到 Wi-Fi 和 AWS IoT MQTT 消息代理。

运行项目时,MPLAB X IDE 应当打开输出窗口。确保选择了 ICD4 选项卡。您应当看到如下输出。

Bootloader version 00.09.00 [prvBOOT_Init] Watchdog timer initialized. [prvBOOT_Init] Crypto initialized. [prvValidateImage] Validating image at Bank : 0 [prvValidateImage] No application image or magic code present at: 0xbd000000 [prvBOOT_ValidateImages] Validation failed for image at 0xbd000000 [prvValidateImage] Validating image at Bank : 1 [prvValidateImage] No application image or magic code present at: 0xbd100000 [prvBOOT_ValidateImages] Validation failed for image at 0xbd100000 [prvBOOT_ValidateImages] Booting default image. >0 36246 [IP-task] vDHCPProcess: offer ac140a0eip 1 36297 [IP-task] vDHCPProcess: offer ac140a0eip 2 36297 [IP-task] IP Address: 172.20.10.14 3 36297 [IP-task] Subnet Mask: 255.255.255.240 4 36297 [IP-task] Gateway Address: 172.20.10.1 5 36297 [IP-task] DNS Server Address: 172.20.10.1 6 36299 [OTA] OTA demo version 0.9.2 7 36299 [OTA] Creating MQTT Client... 8 36299 [OTA] Connecting to broker... 9 38673 [OTA] Connected to broker. 10 38793 [OTA Task] [prvSubscribeToJobNotificationTopics] OK: $aws/things/devthingota/jobs/$next/get/accepted 11 38863 [OTA Task] [prvSubscribeToJobNotificationTopics] OK: $aws/things/devthingota/jobs/notify-next 12 38863 [OTA Task] [OTA_CheckForUpdate] Request #0 13 38964 [OTA] [OTA_AgentInit] Ready. 14 38973 [OTA Task] [prvParseJSONbyModel] Extracted parameter [ clientToken: 0:devthingota ] 15 38973 [OTA Task] [prvParseJSONbyModel] parameter not present: execution 16 38973 [OTA Task] [prvParseJSONbyModel] parameter not present: jobId 17 38973 [OTA Task] [prvParseJSONbyModel] parameter not present: jobDocument 18 38973 [OTA Task] [prvParseJSONbyModel] parameter not present: streamname 19 38973 [OTA Task] [prvParseJSONbyModel] parameter not present: files 20 38975 [OTA Task] [prvParseJSONbyModel] parameter not present: filepath 21 38975 [OTA Task] [prvParseJSONbyModel] parameter not present: filesize 22 38975 [OTA Task] [prvParseJSONbyModel] parameter not present: fileid 23 38975 [OTA Task] [prvParseJSONbyModel] parameter not present: certfile 24 38975 [OTA Task] [prvParseJSONbyModel] parameter not present: sig-sha256-ecdsa 25 38975 [OTA Task] [prvParseJobDoc] Ignoring job without ID. 26 38975 [OTA Task] [prvOTA_Close] Context->0x8003b620 27 38975 [OTA Task] [prvPAL_Abort] Abort - OK 28 39964 [OTA] State: Ready Received: 1 Queued: 1 Processed: 1 Dropped: 0 29 40964 [OTA] State: Ready Received: 1 Queued: 1 Processed: 1 Dropped: 0 30 41964 [OTA] State: Ready Received: 1 Queued: 1 Processed: 1 Dropped: 0 31 42964 [OTA] State: Ready Received: 1 Queued: 1 Processed: 1 Dropped: 0 32 43964 [OTA] State: Ready Received: 1 Queued: 1 Processed: 1 Dropped: 0 33 44964 [OTA] State: Ready Received: 1 Queued: 1 Processed: 1 Dropped: 0 34 45964 [OTA] State: Ready Received: 1 Queued: 1 Processed: 1 Dropped: 0 35 46964 [OTA] State: Ready Received: 1 Queued: 1 Processed: 1 Dropped: 0 36 47964 [OTA] State: Ready Received: 1 Queued: 1 Processed: 1 Dropped: 0

终端模拟器应当显示类似以下内容的文本:

AWS Validate: no valid signature in descr: 0xbd000000 AWS Validate: no valid signature in descr: 0xbd100000 >AWS Launch: No Map performed. Running directly from address: 0x9d000020? AWS Launch: wait for app at: 0x9d000020 WILC1000: Initializing... 0 0 >[None] Seed for randomizer: 1172751941 1 0 [None] Random numbers: 00004272 00003B34 00000602 00002DE3 Chip ID 1503a0 [spi_cmd_rsp][356][nmi spi]: Failed cmd response read, bus error... [spi_read_reg][1086][nmi spi]: Failed cmd response, read reg (0000108c)... [spi_read_reg][1116]Reset and retry 10 108c Firmware ver. : 4.2.1 Min driver ver : 4.2.1 Curr driver ver: 4.2.1 WILC1000: Initialization successful! Start Wi-Fi Connection... Wi-Fi Connected 2 7219 [IP-task] vDHCPProcess: offer c0a804beip 3 7230 [IP-task] vDHCPProcess: offer c0a804beip 4 7230 [IP-task] IP Address: 192.168.4.190 5 7230 [IP-task] Subnet Mask: 255.255.240.0 6 7230 [IP-task] Gateway Address: 192.168.0.1 7 7230 [IP-task] DNS Server Address: 208.67.222.222 8 7232 [OTA] OTA demo version 0.9.0 9 7232 [OTA] Creating MQTT Client... 10 7232 [OTA] Connecting to broker... 11 7232 [OTA] Sending command to MQTT task. 12 7232 [MQTT] Received message 10000 from queue. 13 8501 [IP-task] Socket sending wakeup to MQTT task. 14 10207 [MQTT] Received message 0 from queue. 15 10256 [IP-task] Socket sending wakeup to MQTT task. 16 10256 [MQTT] Received message 0 from queue. 17 10256 [MQTT] MQTT Connect was accepted. Connection established. 18 10256 [MQTT] Notifying task. 19 10257 [OTA] Command sent to MQTT task passed. 20 10257 [OTA] Connected to broker. 21 10258 [OTA Task] Sending command to MQTT task. 22 10258 [MQTT] Received message 20000 from queue. 23 10306 [IP-task] Socket sending wakeup to MQTT task. 24 10306 [MQTT] Received message 0 from queue. 25 10306 [MQTT] MQTT Subscribe was accepted. Subscribed. 26 10306 [MQTT] Notifying task. 27 10307 [OTA Task] Command sent to MQTT task passed. 28 10307 [OTA Task] [OTA] Subscribed to topic: $aws/things/Microchip/jobs/$next/get/accepted 29 10307 [OTA Task] Sending command to MQTT task. 30 10307 [MQTT] Received message 30000 from queue. 31 10336 [IP-task] Socket sending wakeup to MQTT task. 32 10336 [MQTT] Received message 0 from queue. 33 10336 [MQTT] MQTT Subscribe was accepted. Subscribed. 34 10336 [MQTT] Notifying task. 35 10336 [OTA Task] Command sent to MQTT task passed. 36 10336 [OTA Task] [OTA] Subscribed to topic: $aws/things/Microchip/jobs/notify-next 37 10336 [OTA Task] [OTA] Check For Update #0 38 10336 [OTA Task] Sending command to MQTT task. 39 10336 [MQTT] Received message 40000 from queue. 40 10366 [IP-task] Socket sending wakeup to MQTT task. 41 10366 [MQTT] Received message 0 from queue. 42 10366 [MQTT] MQTT Publish was successful. 43 10366 [MQTT] Notifying task. 44 10366 [OTA Task] Command sent to MQTT task passed. 45 10376 [IP-task] Socket sending wakeup to MQTT task. 46 10376 [MQTT] Received message 0 from queue. 47 10376 [OTA Task] [OTA] Set job doc parameter [ clientToken: 0:Microchip ] 48 10376 [OTA Task] [OTA] Missing job parameter: execution 49 10376 [OTA Task] [OTA] Missing job parameter: jobId 50 10376 [OTA Task] [OTA] Missing job parameter: jobDocument 51 10378 [OTA Task] [OTA] Missing job parameter: ts_ota 52 10378 [OTA Task] [OTA] Missing job parameter: files 53 10378 [OTA Task] [OTA] Missing job parameter: streamname 54 10378 [OTA Task] [OTA] Missing job parameter: certfile 55 10378 [OTA Task] [OTA] Missing job parameter: filepath 56 10378 [OTA Task] [OTA] Missing job parameter: filesize 57 10378 [OTA Task] [OTA] Missing job parameter: sig-sha256-ecdsa 58 10378 [OTA Task] [OTA] Missing job parameter: fileid 59 10378 [OTA Task] [OTA] Missing job parameter: attr 60 10378 [OTA Task] [OTA] Returned buffer to MQTT Client. 61 11367 [OTA] [OTA] Queued: 1 Processed: 1 Dropped: 0 62 12367 [OTA] [OTA] Queued: 1 Processed: 1 Dropped: 0 63 13367 [OTA] [OTA] Queued: 1 Processed: 1 Dropped: 0 64 14367 [OTA] [OTA] Queued: 1 Processed: 1 Dropped: 0 65 15367 [OTA] [OTA] Queued: 1 Processed: 1 Dropped: 0 66 16367 [OTA] [OTA] Queued: 1 Processed: 1 Dropped: 0

此输出表明 Microchip Curiosity PIC32MZEF 能够连接到 AWS IoT,并订阅 OTA 更新所需的 MQTT 主题。出现 Missing job parameter 消息在预料之中,因为没有待处理的 OTA 更新作业。