Applications Development on the ARM® Cortex™-M0+
Free On-line Development Tools
Presented by William Antunes
Agenda
– Cortex M0+ architecture – Introduction to Kinetis L – Freedom board
– Arrow Cloud Connect
– Internet of Things introduction – iDigi cloud services overview – First IoT application
– Customer dashboard development
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ARM® Cortex™-M0+
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Reasons to migrate to 32-bit core?
• “I need more performance.”
• “I need more connectivity”
• “I need more memory”
Reasons not to migrate to 32-bit core?
• “I need low power”
• “I need low cost”
The Cortex-M0+ was designed to provide all the
benefits of a 32-bit core at 8-bit/16-bit power and cost.
ARM® Cortex™ M0+
ARM® Cortex™-M0+ Bus Architecture
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ARM® Cortex™-M0+ Low Latency I/O Interface
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I/O Interface provides “Harvard- like” access to peripherals
Improves overall cycle efficiency for I/O access
ARM® Cortex™-M0+ Performance
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Pipeline
Cortex-M4 3
Harvard
ISA Thumb-2
DMIPS/MHz 1.25
MPU Optional
Bus Arch.
ARM7
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Arm/Thumb 0.95/0.70
No
Von Neumann
Cortex-M0
Von Neumann Thumb(wT2)
0.84 No
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Cortex-M0+
Von Neumann Thumb(wT2)
0.93 Optional
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Interrupts 2 1 - 240 1-32 1-32
Area 0.34 mm2 0.17 mm2 0.04 mm2 0.04 mm2
Power 70µW/MHz 33 µW/MHz 16 µW/MHz 11 µW/MHz
ARM® Cortex™-M0+
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So what does this really mean for 8 and 16-bit cores?
ARM Cortex-M0+ Memory Map
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No paging, swapping, or instruction set extensions common in 8 & 16 bit architectures
32-bit registers means 4GB address space
ARM Cortex-M0+ Instruction Efficiency
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This means better memory usage and fewer clock cycles 32-bit means instruction
set efficiency
ARM Cortex-M0+ vs common 8/16 bit cores
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ARM Cortex-M0+ Summary
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Shorter pipeline optimized for energy efficiency
Fetch Decode Execute code
Exe Fetch De
More Options
New Fast I/O Port Micro Trace Buffer (MTB) Re-locatable Vector Table Memory Protection Unit (MPU)
From Cortex-M3
Full ARMv6-M compatible
More for less
Freescale Kinetis L
Kinetis Portfolio
Kinetis K-Series to Kinetis L-Series Migration
Kinetis L Superset Block Diagram
Kinetis L Bit Manipulation Engine
Peripherals Core Accesses BME
Bit Manipulation Engine (BME)
Decorated Stores
● AND, OR, XOR and Bit field insert (BFI)
Decorated Loads
● Load and clear one bit (LAC1), Load and Set one bit (LAS1), Unsigned bit field extract (UBFX)
Task Normal C Code
Size BME Code Size Improvement Logical XOR operation 12Bytes 6Bytes 50%
GPIOA_PDOR ^= 0x02; // Logical XOR 0000005E 0x.... LDR R0,??
DataTable6_5 ;; 0x400ff000
00000060 0x6800 LDR R0,[R0, #+0]
00000062 0x2102 MOVS R1,#+2 00000064 0x4041 EORS R1,R1,R0 00000066 0x.... LDR R0,??
DataTable6_5 ;; 0x400ff000
00000068 0x6001 STR R1,[R0, #+0]
Uses 12 Bytes
// Macro used to generate hardcoded XOR address
#define BME_XOR_ADDR(ADDR) (*(volatile uint32_t *) (((uint32_t)ADDR) | (3<<26)))
BME_XOR_ADDR(&GPIOA_PDOR) = 0x02;
00000014 0x.... LDR R0,??
DataTable6_6 ;; 0x4c0ff000
00000016 0x2102 MOVS R1,#+2
00000018 0x6001 STR R1,[R0, #+0]
Uses 6 Bytes
Freedom Board
Freedom Board Overview
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http://arw.io/37Ux
OpenSDA – Serial Debug Adapter
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OpenSDA Circuit
GPIO
OpenSDA – Serial Debug Adapter
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K20
Kinetis-L
SWD UART0 Reset D4
USB Host
OpenSDA
GPIO
USB
UART
SPI
MSD Bootloader
OpenSDA Application
SW1
Lab 0 – Loading OpenSDA Applications
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Verify OpenSDA Application 0 Unplug USB Cable if attached
1 Press and hold the reset button(SW1)
2 Plug in USB cable to the OpenSDA USB connector labeled “SDA”
3 Release the reset button
4 Open the removable drive labeled
“BOOTLOADER”
Load OpenSDA Application
5 Double click on the file fsl_web.htm
6 Download and unzip the FRDM-KL25Z Quick Start Package
7 Copy and Paste
MSD-FRDM-KL25Z_Pemicro_v105.SDA to the “BOOTLOADER” removable drive
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Unplug USB Cable and plug in again to the same USB connecter labeled
“SDA”. This time do not press the reset button.
9 You are now running the latest version of the OpenSDA MSD Application
This same basic procedure can be repeated to load other OpenSDA applications
Lab 0 – Loading OpenSDA Applications
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Verify Current OpenSDA Application
10 Open the removable drive labeled FRDM-KL25Z
11 Double click on the file SDA_INFO.HTM
12 Allow to run blocked script if prompted
13 Web page will display OpenSDA application
Power Options
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5 V
5 V
P5- 9V_VI N P
3 V
3 CR
203 2
Using the Freedom Board as a debugger?
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Power Profiling
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IJET-ARM
arw.io/37V0
Expansion Headers and Shields
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D1 D0 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 GND AREF D14 D15
A5 A4 A3 A2 A1 A0 P5-9V_VIN GND GND P5V_USB P3V 3 RESET
P3V 3 SDA_PTD 5
The outer rows of expansion pins are compatible with many shields on the market
Tri-Color LED
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Tri-Color LED
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CLV1A-FKB-CJ1M1F1BB7R4S3
Series &
Options Binning
Kinetis-L
LED
Cree and the Cree logo are registered trademarks of Cree, Inc.
PTB18 PTB19 PTD1(D13) R
G B
http://arw.io/37Uv
Capacitive Touch Slider
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Kinetis-L
TSI0_CH09
TSI0_CH10
SPI FLASH Memory
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Kinetis-L OpenSDA
SPI
Flash
MMA8451Q Accelerometer
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3-Axis 14-bit/8-bit Digital Accelerometer
Kinetis-L MMA8451Q
I2C0
INT1 INT2
PTA14 PTA15 I2C
http://arw.io/37Uw
Introducing Arrow Cloud Connect
Lab 1 – My first Arrow Cloud Connect Project
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0 Browse to arrow.transim.com/designweb
Lab 1 – My first Arrow Cloud Connect Project
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1 Use Design Web to start to Arrow Cloud Connect
arrow.transim.com/arrowcloudconnect
Lab 1 – My first Arrow Cloud Connect Project
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2 Click the “Getting Started” icon from the tool bar
3 Register for your free account
Knowledge Base
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Discussion Forums
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Code Library
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Accounts
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Integrated Development Environment
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Cont’d 4
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6 Build Application
7 Save .s19 file to FRDM-LK25Z removable drive*
Click the “IDE/Compiler” icon from the toolbar
Lab 1 – My first Arrow Cloud Connect Project
8 If successful, the tri-color LED should be flashing in sequence
The Internet of (many) Things
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Internet
So how big is the Internet of Things?
What is the Internet of Things(IoT)?
Billions and Billions and Billions!
So how does the Internet of Things actually work?
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Internet
Ubiquitous device networks will require low cost and low power solutions
How to connect to the Internet?
Device Gateway
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Internet
How are we going to connect today?
?
Lab 2 – Install Serial Driver
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0
1 Open “Device Manger” and locate the
“PEMicro/Freescale – CDC Serial Port” device
2 Right click on “PEMicro/Freescale – CDC Serial Port” device and select “Update Driver Software” *
Plug in USB cable to the OpenSDA USB connector labeled “SDA”
3 Choose to locate and install driver software manually.
4 Browse and select “FRDM-KL25Z” has the drive location for search.
5 When driver installation is complete you should see a device
entry corresponding to the Freedom board serial port
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Internet
What are we going to do with the data?
?
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Internet
Client Server?
?
This is not a very scalable IoT application architecture
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Internet
Set up a server?
?
How about “Cloud Computing”
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Internet
What is Cloud Computing?
?
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Cloud Computing Stack
Cloud Computing Stack
Application as a Service (AaaS)
Infrastructure as a Service
(IaaS)
Platform as a Service (PaaS)
Cellular Wired Satellite
Servers
Storage
Data Center
Network Operations Google App Engine
Arrow Cloud Connect
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Internet of Things Stack
IoT Stack
Application as a Service (AaaS)
Device Network Platform as a Service
(PaaS)
Arrow Cloud Connect
Infrastructure as a Service
(IaaS)
Thing Device Gateway
Wireless Network
Connect Core i.MX53
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Internet of Things with Arrow Cloud Connect
Lab 3 – Get Started with the iDigi Device Cloud
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0
1
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Select the “Make a Thing for the Internet” Wizard Click the “Getting Started” icon from the tool bar
IMPORTANT: The iDigi registration process will send you a confirmation email to validate your account. Make sure you use an email address that you have access to right now!
If you already have an iDigi account you may skip this step.
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Save to a readily available location on your computer
Install the iDigi Software Gateway and run
Lab 3 – Get Started with the iDigi Device Cloud
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Log In to iDigi Software Gateway using iDigi account credentials
Verify that the iDigi Software Gateway is detected
Download and program application to Freedom Board(right-click, save as…)
Lab 3 – Get Started with the iDigi Device Cloud
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Add device to iDigi Software Gateway
Select COM port of Freedom board and provide a descriptive name
Lab 3 – Get Started with the iDigi Device Cloud
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11 Freedom board will Identify and Connect.
Verify that Freedom Board is detected
You may have to press reset button
