AN-1050 [CYMBET]

Using the EnerChip Energy Harvesters with the TI LaunchPad; 使用的EnerChip能量采集器与TI LaunchPad的


型号：	AN-1050
厂家：	CYMBET CORPORATION
描述：	Using the EnerChip Energy Harvesters with the TI LaunchPad 使用的EnerChip能量采集器与TI LaunchPad的
文件：	总6页 (文件大小：1391K)
中文：	中文翻译
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AN-1050

Application Note

Using the EnerChip™ Energy Harvesters with the TI LaunchPad

Overview

Cymbet EnerChip^TMenergy harvesting solutions are well suited to powering low power microcontrollers (MCUs)

and radios used in wireless sensor networks, data logging, and RFID applications. Useful amounts of energy

can be harvested from a variety of ambient power sources including light, vibration, temperature differentials,

and electromagnetic generators activated by liquid or air ﬂow. Cymbet has developed power management and

energy storage solutions that can be used in all such environments, making routine replacement of conventional

batteries unnecessary.

This application note describes how three of the Cymbet Energy harvesting EVAL kits can provide uninterrupted

power to the Texas Instruments MSP430-based LaunchPad development kit. Figure 1 illustrates the Cymbet

EVAL-10 EnerChip CC Solar Energy Harvesting Kit connected to the TI LaunchPad. The EVAL-10 evaluation kit

from Cymbet captures ambient light (indoor or outdoor) from the solar cell, converts the power efﬁciently using

the Enerchip power management circuit, and provides continuous regulated power to the LaunchPad.

Cymbet Energy Harvesting Kits and the Texas Instruments MSP430 LaunchPad

Cymbet has developed a number of innovative energy harvesting power management solutions and embodied

them in several development boards. Three of these EH EVAL Kits work with the LaunchPad:

•

CBC-EVAL-09: EnerChip™ EP Universal Energy Harvester Evaluation Kit

CBC-EVAL-10: EnerChip™ CC Energy Harvester Evaluation Kit (Figure 1)

CBC-EVAL-11: EnerChip™ CC Inductive Charging Evaluation Kit

Figure 1: Cymbet CBC-EVAL-10 Energy Harvesting Evaluation Kit (right) Powering the TI LaunchPad (left).

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AN-1050: EnerChip™ EH with TI LaunchPad

CBC-EVAL-09 Universal Energy Harvester with Energy Processor

CBC-EVAL-09 is a universal energy harvesting (EH) evaluation kit that combines any one of multiple EH

transducers with the EnerChip^TMEP CBC915-ACA Energy Processor and the EnerChip CBC51100 100µAh solid

state battery module that has two 50µAh EnerChip solid state batteries connected in parallel. The purpose of

this evaluation platform is to enable designers to quickly develop Energy Harvesting applications. The CBC-

EVAL-09 ships with a solar cell for initial evaluation kit testing. A photo of CBC-EVAL-09 board is shown in Figure

2. The CBC-EVAL-09 data sheet is located here: http://www.cymbet.com/content/products-resource-docs.asp.

The EVAL-09 is available at Avnet, Digi-Key and Mouser.

Connecting the CBC-EVAL-09 to the TI LaunchPad

After connecting the TI LaunchPad to a PC via the USB cable, it must be disconnected before connecting the

EVAL-09. The white cable included in the EVAL-09 kit is used to connect the two kits together using VOUT and

GND.

Important Note: There is a special orientation to the cable connection as shown in Figure 2. The cable is placed

on pins 4 and 5 on J10 and the middle GND pin and VCC pin on the TI LaunchPad J6 connector. It is important

not to connect the pin 3 VBAT connector on the EVAL-09 J10 connector to the top GND pin on the LaunchPad.

This would result in improper operation of the EVAL-09.

Also, in order to avoid EH powering the entire TI LaunchPad board vs. just the MSP430 MCU, the LaunchPad J3

VCC and RST connector jumpers must be removed and set aside. These are to be restored for USB operation.

Figure 2: CBC-EVAL-09 Universal Energy Harvester Connected to LaunchPad (top). Detail of Ribbon Cable Connection to

CBC-EVAL-09 Board (bottom left) and LaunchPad (bottom right).

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AN-1050: EnerChip™ EH with TI LaunchPad

CBC-EVAL-10 EnerChip CC Solar Energy Harvester

CBC-EVAL-10 is a demonstration kit that provides designers a platform to easily develop Energy Harvesting (EH)

solutions using the EnerChip CBC3150^TMconfigured to operate in an energy harvesting mode. The kit (shown in

Figure 4) combines a small solar panel, power management circuit, energy storage, regulated output voltage,

and input/output pins for connection to commercially available microcontroller (MCU) and radio boards. A 16-

pin CBC51100 module is included, providing the EH functions, battery management, and 100µAh solid state

rechargeable energy storage. CBC-EVAL-10 is a practical, low cost realization of an EH-based power system that

can provide many years of service without need of battery maintenance. Figure 3 illustrates the basic conﬁguration

of the EnerChip CC circuit as implemented on the CBC-EVAL-10 development module designed for evaluating the

EnerChip CC devices in energy harvesting applications. The CBC-EVAL-10 data sheet is located here:

http://www.cymbet.com/content/products-resource-docs.asp. The EVAL-10 is available at Avnet, Digi-Key and

Mouser.

Photovoltaic

Cells

Input Power Tracking

Battery Management

Power Management

Energy Storage

External Battery

and Control

(Optional)

Output Voltage

Regulation

I/O Control

Figure 3: Implementing Energy Harvesting with the EnerChip CC CBC3150 on the CBC-EVAL-10 Evaluation Kit.

Connecting the CBC-EVAL-10 to the TI LaunchPad

After connecting the TI LaunchPad to a PC via the USB cable, it must be disconnected before connecting the

EVAL-10.

The white cable included in the EVAL-10 kit is used to connect the two kits together (see Figure 4). The cable is

placed over all five pins on EVAL-10 J9 and all three pins on the TI LaunchPad J6 connector. Ensure that pin 5 on

the EVAL-10 connector is connected to VCC on the LaunchPad.

Also, in order to avoid EH powering the entire TI LaunchPad board vs. just the MSP430 MCU, the LaunchPad J3

VCC and RST connector jumpers must be removed and set aside. These are to be restored for USB operation.

Figure 4: CBC-EVAL-10 Demo Kit Connected to the LaunchPad.

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AN-1050: EnerChip™ EH with TI LaunchPad

CBC-EVAL-11 EnerChip CC Inductive Charger

CBC-EVAL-11 (shown in Figure 5) is a demonstration kit combining an RF inductive transmitter board with a receiver

board containing an EnerChip CC CBC3150 solid state storage device with integrated power management. The

transmitter board operates at 13.56 MHz and derives its power from a USB port. In addition to the EnerChip CC,

the receiver board has a planar antenna for receiving power from the transmitter board, an output capacitor for

delivering pulse current for radio transmissions, and a header connector for mating to a target board containing,

for example, a microcontroller and/or radio board. The CBC-EVAL-11 data sheet can be found at:

http://www.cymbet.com/content/products-resource-docs.asp. The EVAL-11 is available at Avnet, Digi-Key and

Mouser.

Connecting the CBC-EVAL-11 to the TI LaunchPad

After connecting the TI LaunchPad to a PC via the USB cable, it must be disconnected before connectiing the

EVAL-11 to the LaunchPad.

The white cable included in the EVAL-11 kit is used to connect the two kits together. Note the orientation of the

EVAL-11 to the TI LaunchPad. The cable is placed over all five pins on EVAL-11 J4 connector and all three pins on

the TI LaunchPad J6 connector. Ensure that pin 5 on the EVAL-11 J4 connector is connected to VCC pin on the

LaunchPad.

Also, in order to avoid EH powering the entire TI LaunchPad board vs. just the MSP430 MCU, the LaunchPad J3

VCC and RST connector jumpers must be removed and set aside. These are to be restored for USB operation.

Figure 5: CBC-EVAL-11 Connected to LaunchPad, Along with a Functional Diagram of the CBC-EVAL-11 Receiver Board.

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AN-1050: EnerChip™ EH with TI LaunchPad

Using Energy Harvesting Data Logging Firmware with the LaunchPad V1.1

To use the LaunchPad as an energy harvesting datalogger you must use the IAR or Code Composer development

environment to build and load the datalogging ﬁrmware. The IAR and Code Composer project can be found on the

CD-ROM included with the Cymbet EVAL kit or is also available at the Cymbet Corporation web site: http://www.

cymbet.com/content/products-resource-docs.asp in the Software/Firmware table.

Install the MSP430G2231 chip into the LaunchPad board. Build and load the datalogger application to the

LaunchPad board. The datalogger application is based on the original LaunchPad thermal demo code and the

original LaunchPad code will be readily apparent from viewing the source. The datalogger code runs ﬁrst and

then defaults to the LaunchPad thermal demo application when plugged into the USB port.

USB Powered Mode

In this mode the LaunchPad board gets its power from the USB cable. To conﬁgure for this mode make sure the

ﬂex cable from the Cymbet Energy Harvester is disconnected. Install the original 5 jumpers in the J3 block.

Power for the board now comes from the USB connection.

Cymbet EVAL Kit Powered Mode

This conﬁguration powers the LaunchPad board from one of Cymbet’s energy harvesting EVAL kits. To operate in

this mode, you must ﬁrst unplug the LaunchPad from the USB port and remove jumpers VCC and RST from the

J3 jumper block. This keeps the energy harvester from powering the USB interface and only powers the actual

MSP430 MCU chip. Connect the 5-pin ﬂat ﬂex cable from the energy harvesting board to J6 of the LaunchPad

board as detailed in the appropriate previous section.

Log Temperature Data

To log temperature data, conﬁgure the LaunchPad board in CYMBET POWERED MODE. The LaunchPad will start

blinking both of the LEDs at a 1 second rate. A short press of the button starts logging. The green LED will blink

with each temperature logged and will initially log one temperature per 2 seconds. After the 32 temperatures are

logged, each with a corresponding blink of the green LED, the red LED will blink to indicate the logger registers

are full. Go to the next Read Temperature Data section to conﬁgure the LaunchPad to send its logged data and

clear itself for another run.

The 2-second logging interval is declared in a #deﬁne statement in the C source code and may be modiﬁed by

recompiling and reloading the ﬁrmware.

Read Temperature Data

To readout logged data, conﬁgure the LaunchPad board for USB POWERED MODE. When the LaunchPad board is

plugged into the USB port a COM port driver will appear in the device manager of Windows that is called MSP430

Application UART with an associated COM port number. Note this number. Start up a terminal emulator program

like TeraTerm or Hyperterminal and conﬁgure to hook this COM port at 9600 baud with no ﬂow control and 1 stop

bit and 8 bits of data. The LaunchPad board will now blink the LEDs alternately at about a half-second rate. A

short press of the left button will cause any logged data to be sent to the terminal emulator as 8-bit ASCII HEX

values that represent the upper 8 bits of the 10-bit A/D converter reading the temperature sensor. If there is no

data logged, you will see a 00, on the terminal emulator to indicate no data present. If you don’t see any data the

terminal emulator is not conﬁgured correctly. If you see logged temperature data you may press the reset button

followed by a 1 second press of the left button to again send the data. To erase data press the RESET button

and then hold the left button down for over 3 seconds and the application will again send the data but erase it

afterwards. After readout the LaunchPad will revert to the original LaunchPad demo software.

The application may now be used to log new data.

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AN-1050: EnerChip™ EH with TI LaunchPad

Terminal Emulator Quirks

In Windows the terminal emulator must be operating on a USB COM port emulation driver which instantiates as

COMX where X could be any number based on the particular port and particular connection of the LaunchPad

hardware when the LaunchPad is plugged into the USB port. Various terminal emulators can be quirky on

“hooking” or connecting to a particular COM port. Use the device manager to make sure the COM port for the

“MSP430 applications UART” appears under Ports (COM and LPT). If the “MSP430 applications UART” does not

appear try unplugging the LaunchPad/USB cable from your PC and plugging it into a different USB port. Once

you see the “MSP430 applications UART”, note the COM port number and conﬁgure the terminal emulator to use

that COM port. Remember that when you unplug the USB cable to the LaunchPad, the COM port will probably

disappear and so will its connection to the terminal emulator. You may need to close the terminal emulator,

unplug the LaunchPad cable, wait a few seconds, plug in the LaunchPad, restart the terminal emulator, and

conﬁgure the terminal emulator.

To conﬁgure the desired COM port, set the port for 8 bits, 9600 baud, no parity, with one stop bit and no ﬂow

control.

Code Description

The datalogger code is based on the original LaunchPad temperature demo code. This original code makes use

of many timer modes and uses the watchdog timer as a switch debounce timer. The timer code and the function

PreApplicationMode was modiﬁed to make the button detect a short or long button press. There are several

routines that reconﬁgure the timers for the various modes of the LaunchPad demo and an additional mode was

added for the Cymbet Datalogger demo. The Cymbet Datalogger demo code checks for the modem cable not

present and then calls the CymbetLogData routine which reconﬁgures the timers, runs the Cymbet datalogger,

and then blinks the red LED when full. If the modem cable is present the routine waits for a button press to dump

any logged data, erases the logged data if the button press was long, and then returns to the original LaunchPad

demo.

Ordering Information

EnerChip Part Number

Description

Notes

A CBC3112 and a CBC3150 on 24-

pin module for experimentation

CBC-EVAL-05

EnerChip CC Evaluation Kit

EnerChip CC 50uAh with

Integrated Power Management

CBC3150-D9C

CBC-EVAL-10

Parts sold tube or tape-and-reel

EnerChip CC Energy Harvester

Evaluation Kit

Contains Solar Cell Panel and

CBC51100 Module

EnerChip Universal Energy

Harvesting Demo Kit

Contains Solar Cell and

CBC51100 Module

CBC-EVAL-09

CBC-EVAL-11

EnerChip CC Inductive Charging

Evaluation Kit

Shipped in Box

Disclaimer of Warranties; As Is

The information provided in this application note is provided “As Is” and Cymbet Corporation disclaims all representations or warranties of

any kind, express or implied, relating to this application note and the Cymbet battery product described herein, including without limitation,

the implied warranties of merchantability, ﬁtness for a particular purpose, non-infringement, title, or any warranties arising out of course of

dealing, course of performance, or usage of trade. Cymbet battery products are not approved for use in life critical applications. Users shall

conﬁrm suitability of the Cymbet battery product in any products or applications in which the Cymbet battery product is adopted for use and

are solely responsible for all legal, regulatory, and safety-related requirements concerning their products and applications and any use of the

Cymbet battery product described herein in any such product or applications.

AN-72-1050 Rev A

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AN-1050 [CYMBET]

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