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An open source platform for IoT Bogdan Marinescu mbed.

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Presentation on theme: "An open source platform for IoT Bogdan Marinescu mbed."— Presentation transcript:

1 An open source platform for IoT Bogdan Marinescu mbed

2 What is mbed?  mbed is an open source platform for developing embedded systems based on ARM Cortex ® -M microprocessor

3 Microcontroller and Toolchain Portability Hardware Abstraction LayerC Libraries and project exports Starting at £8.24

4 Components Libraries  Write a component library once and get supported on multiple mbed platforms.  Implement the mbed HAL once and immediately support thousands of components.

5 Example Application LIS302 Accelerometer  Simple user friendly C++ for the user  Component-based approach  The implementation does not reference any MCU register, but only the mbed API

6 Open Source Project  41 Contributors (github stats track only its users)  149 Pull Requests  112 Followers  108 mailing list members Open sourced Feb. 2013, already getting momentum

7 Developer Community  50,023 users  6,358 public code repositories  75% of questions receive an answer

8 CMSIS-DAP  Standardized access to the Coresight Debug Access Port (DAP) of an ARM Cortex microcontroller via USB HID (no drivers). >>> from pyOCD.board import MbedBoard >>> target = MbedBoard.chooseBoard().target 0 => MBED MBED CMSIS-DAP (0xd28, 0x204) [lpc1768] >>> target.halt() >>> target.readCoreRegister("pc") 1392 >>> target.step() >>> target.readCoreRegister("pc") 1394 https://github.com/mbedmicro/pyOCD

9 SDK Architecture

10 C++ in the SDK  Lightweight, runs on small targets  No exceptions/RTTI  Put OOP to good use  Minimal impact on speed

11 C++ in the SDK  Lightweight wrapper  Concise  Stable API  14.2k flash / 0.5k RAM  Verbose  Harder to understand  API may change  11.1k flash / 0.4k RAM

12 Using the Compiler - Online

13 Using the Compiler – Offline  Export from online IDE  Use offline IDE/command line tools (make)  Supported: uVision, IAR, make (various), CodeRed … c:\work\temp> unzip ~/Downloads/blinky_gccarm_lpc1768.zip inflating: blinky/main.cpp inflating: blinky/.hgignore inflating: blinky/Makefile ……… c:\work\temp> cd blinky\ [hg:default] c:\work\temp\blinky> make arm-none-eabi-g++ -mcpu=cortex-m3 -mthumb -c -Os -fno-common -fmessage-length=0 -Wall - fno-exceptions -ffunction-sections -fdata-sections -DTARGET_LPC1768 -DTARGET_M3 ……… ……… arm-none-eabi-objcopy -O binary blinky.elf blinky.bin [hg:default] c:\work\temp\blinky> move blinky.bin e:

14 What makes the IoT tick  Specific protocols  Low overhead  Interoperability  Security  Low power  Different transports  Radio (2.4Ghz)  Radio (sub GHz)  WiFi  Cellular  Wired

15 mbed network stack

16 Example network application - eth #include "mbed.h" #include "EthernetInterface.h" int main() { EthernetInterface eth; eth.init(); //Use DHCP eth.connect(); printf("IP Address is %s\n", eth.getIPAddress()); TCPSocketConnection sock; sock.connect("mbed.org", 80); char http_cmd[] = "GET /media/uploads/mbed_official/hello.txt HTTP/1.0\n\n"; sock.send_all(http_cmd, sizeof(http_cmd)-1); char buffer[300]; int ret; while (true) { ret = sock.receive(buffer, sizeof(buffer)-1); if (ret <= 0) break; buffer[ret] = '\0'; printf("Received %d chars from server:\n%s\n", ret, buffer); } sock.close(); eth.disconnect(); }

17 Example network application - WiFi #include "mbed.h" #include “WiflyInterface.h" int main() { WiflyInterface wifly(p28, p27, p26, p25, "myssid", "mypassword", WPA); wifly.init(); //Use DHCP while (!wifly.connect()); // join the network printf("IP Address is %s\n", wifly.getIPAddress()); TCPSocketConnection sock; sock.connect("mbed.org", 80); char http_cmd[] = "GET /media/uploads/mbed_official/hello.txt HTTP/1.0\n\n"; sock.send_all(http_cmd, sizeof(http_cmd)-1); char buffer[300]; int ret; while (true) { ret = sock.receive(buffer, sizeof(buffer)-1); if (ret <= 0) break; buffer[ret] = '\0'; printf("Received %d chars from server:\n%s\n", ret, buffer); } sock.close(); wifly.disconnect(); }

18 mbed IoT components

19 mbed IoT protocols Source: https://mbed.org/handbook/TCP-IP-protocols-and-APIs NanoService: https://mbed.org/components/Nanoservice/https://mbed.org/components/Nanoservice/ mqtt: https://mbed.org/cookbook/mbed_Client_for_MQTThttps://mbed.org/cookbook/mbed_Client_for_MQTT BTLE: https://mbed.org/teams/Bluetooth-Low-Energy/https://mbed.org/teams/Bluetooth-Low-Energy/

20 MBED Cloud API Integrations AT&TSprintTelenor

21 Roadmap: IoT

22 Roadmap: 6LoWPAN /  Support for 6LoWPAN and stacks on the mbed SDK.  Addition of reference hardware platforms for quickly experimenting with Wireless Sensor Networks.

23 Roadmap: security

24 Roadmap: Test Infrastructure  Provide Test Infrastructure as a service to mbed.org users  Make TDD/UT/CI a standard part of embedded community

25 Roadmap: the rest  Powerful command line tools  Better debugging  Grow list of platforms  Integrated IoT solution  Low power  Built in security  More protocols

26 Q&A Thank you!


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