STMicroelectronics UM2269 User Manual

UM2269

User manual

Getting started with PowerShield firmware

Introduction

The STM32-LPM01-XN is an STMicroelectronics energy meter firmware dedicated to power consumption measurements for microcontrollers and boards.

It runs on X-NUCLEO-LPM01A and STM32L562E-DK boards.

In this document the firmware and its associated boards are referred to as “PowerShield”.

PowerShield is a a plug-and-play solution intended to ease power consumption measurements, used to supply and measure current consumption of boards such as STM32 Nucleo and Arduino

This document guides the user through the firmware characteristics and specific use cases.

This document must be read in conjunction with the following documents, available on

www.st.com:

• User manuals of boards: – STM32 Nucleo expansion board for power consumption measurement (UM2243) for

standalone board X-NUCLEO-LPM01A

– Discovery board with STM32L562E MCU (UM2617) for STM32L5 discovery kit,

• User manuals of software tool: – STM32CubeMonitor-Power software tool for power and ultra-low-power

measurements (UM2202).

October 2020 UM2269 Rev 6 1/59

www.st.com

Contents UM2269

Contents

1 Boards overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.1 PowerShield standalone board X-NUCLEO-LPM01A . . . . . . . . . . . . . . . . 7

1.2 Quick setup to measure current on board Nucleo64 with

standalone board X-NUCLEO-LPM01A . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.3 STM32L5 discovery board STM32L562E-DK . . . . . . . . . . . . . . . . . . . . . . 9

2 PowerShield modes and requirements . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.1 Standalone mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

2.2 Controlled by host mode with commands sent by a COM

port terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.3 Controlled by host mode with commands sent by a GUI . . . . . . . . . . . . . 12

3 PowerShield standalone mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4 PowerShield controlled by host mode . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.1 Serial COM port configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.2 PowerShield shell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.2.1 Transfer protocol of commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.2.2 Transfer protocol of measurement data stream . . . . . . . . . . . . . . . . . . . 21

4.2.3 Command management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.3 Interface commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.3.1 Command list summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.3.2 Command description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.4 Data stream format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.4.1 Data format 1: ASCII, decimal basis . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.4.2 Data format 2: Binary, hexadecimal basis . . . . . . . . . . . . . . . . . . . . . . . 36

4.5 Examples of typical use cases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.5.1 Minimal mandatory commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.5.2 Continuous measurement (infinite samples) with target reset

during acquisition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

4.5.3 Two single measurements of 100 samples with power-down of board

under test at the end of acquisition . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5 PowerShield acquisition mode dynamic

characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

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5.1 Acquisition range and frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

5.1.1 Pre-processing: acquisition of raw data from ADC . . . . . . . . . . . . . . . . 46

5.1.2 Post-processing: Computation to physical values . . . . . . . . . . . . . . . . . 46

5.1.3 Data sent to user interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

5.2 Acquisition limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

5.2.1 Acquisition frequency limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

5.2.2 Transfer latency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

5.2.3 Transfer overflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6 PowerShield acquisition mode static characteristics . . . . . . . . . . . . . 51

7 PowerShield interface with target board . . . . . . . . . . . . . . . . . . . . . . . . 52

8 Firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

9 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

9.1 Error reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

9.2 Most common possible errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

9.2.1 USB overflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

9.2.2 Target board not starting-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

9.2.3 Host driver USB-VCP installation issue . . . . . . . . . . . . . . . . . . . . . . . . . 56

10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

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List of tables UM2269

List of tables

Table 1. List summary as displayed by firmware when entering

command “help” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 2. Maximum acquisition time possible for a baudrate of 3686400 bauds . . . . . . . . . . . . . . . . 25

Table 3. “help” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 4. “echo” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 5. “powershield” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 6. “version” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 7. “status” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 8. “htc” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 9. “hrc” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 10. “lcd” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 11. “psrst” command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 12. “volt” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 13. “freq” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 14. “acqtime” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 15. “acqmode” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 16. “funcmode” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 17. “output” command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 18. “format” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 19. “trigsrc” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 20. “trigdelay” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 21. “currthre” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 22. “pwr” command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 23. “pwrend” command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 24. “start” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 25. “stop” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 26. “targrst” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 27. “temp” command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 28. “autotest” command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 29. “calib” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 30. ASCII characters description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 31. Timestamp, format 1: ASCII characters description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 32. Error, format 1: ASCII characters description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 33. End of acquisition, format 1: ASCII characters description. . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 34. Power to target, format 1: ASCII characters description. . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 35. Summary, format 1: ASCII characters description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 36. Serial byte 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 37. Serial byte 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 38. Metadata error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 39. Metadata information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Table 40. Metadata timestamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 41. Metadata end of acquisition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 42. Metadata overcurrent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 43. Metadata target power down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 44. Metadada Acknowledge and data command “voltage get”. . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 45. Metadata temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 46. Metadata power to target connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 47. Example of data stream in format 2: Binary, hexadecimal basis . . . . . . . . . . . . . . . . . . . . 42

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Table 48. Minimal mandatory commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Table 49. Continuous measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Table 50. Two single measurements of 100 samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Table 51. Maximum acquisition time possible for a baudrate of 3686400 bauds . . . . . . . . . . . . . . . . 49

Table 52. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

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List of figures UM2269

List of figures

Figure 1. PowerShield board main interface items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 2. PowerShield connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 3. STM32L5 discovery board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 4. PowerShield in standalone mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 5. PowerShield in controlled by host mode with commands sent

by a COM port terminal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 6. PowerShield in controlled by host mode with commands sent by a GUI . . . . . . . . . . . . . . 13

Figure 7. Host detection of PowerShield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 8. Example of serial COM port terminal configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 9. Acquisition range and frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 10. Firmware upgrade switch on board X-NUCLEO01A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 11. Firmware upgrade using software STM32CubeProgrammer . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 12. Firmware upgrade software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

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UM2269 Boards overview

1 Boards overview

For of complete description of PowerShield boards, refer to user manuals:

• For standalone board X-NUCLEO-LPM01A: STM32 Nucleo expansion board for power consumption measurement (UM2243).

• For STM32L5 discovery kit: Discovery board with STM32L562E MCU (UM2617).

These boards and related firmware support STM32 Arm®-based devices.

Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or

elsewhere

1.1 PowerShield standalone board X-NUCLEO-LPM01A

PowerShield board is designed in a user-friendly mode. All features can be controlled by few buttons on board or USB interface.

Figure 1. PowerShield board main interface items

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Boards overview UM2269

MS46931V1

UART

connector

USB

connector

AVDD

GND

D3 D2

+3V3

+5V

GND GND

Nucleo144

Nucleo64

Connectors

(Arduino

Uno)

Generic

connector

for any

target

+3V3

or AVDD

GNDGND

GND

+5V D2 D3

AVDD

+3V3

Nucleo32

Connectors

(Arduino

Nano)

PowerShield board offers three connectors to supply target board: Nucleo64 connector, Nucleo32 connector, basic connector for any target.

Power supply interface

Nucleo connectors have two different pins for power supply:

• +3V3: Power supply for the whole board

• AVDD (AREF): Power supply for the MCU only

PowerShield supply to one of these two pins can be selected by jumpers JP9 and JP10.

• JP10 closed: Power supply on connector +3V3

• JP9 closed: Power supply on connector AVDD

Note: Power can be supplied to one or to both pins (+3V3 and AVDD), depending on target board

configuration to be monitored.

Communication interface

Two physical interfaces are available: USB and UART (reserved for future use).

Figure 2. PowerShield connectors

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UM2269 Boards overview

LED information

The board embeds four LED to inform user on PowerShield state, in standalone mode and controlled by host mode:

• LED green (LD4): Acquisition ongoing

• LED orange (LD3): Power supply to target board (in controlled by host mode, the board

can remain supplied when the acquisition is completed)

• LED blue (LD1): Current measured above defined threshold

• LED red (LD2): Error

1.2 Quick setup to measure current on board Nucleo64 with standalone board X-NUCLEO-LPM01A

Refer to user manual STM32 Nucleo-64 boards (MB1136) (UM1724) for a complete description of Nucleo64 board.

Setup to measure current consumption of MCU only:

• On PowerShield:

– Jumpers of power supply pin: Close jumper AREF_ARD, open jumper 3V3_ARD

• On board Nucleo64:

– Load the desired code to be executed on target board.

– Remove solder bridge SB12 to disconnect reset signal from ST-Link part (ST-Link

can still be used with this configuration to load and debug a program, software tool option “Connect during reset” may be needed).

– Open jumper IDD

1.3 STM32L5 discovery board STM32L562E-DK

STM32L5 discovery board embeds a PowerShield circuitry to measure the STM32L5 MCU power consumption.

It has the same features as PowerShield standalone board except that the STM32L5 discovery board must be used in host mode with computer through USB interface, moreover the acquisition mode static is not available (dynamic mode only). Refer to

PowerShield modes and requirements and Section 5: PowerShield acquisition mode dynamic characteristics for more details.

Section 2:

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Boards overview UM2269

Figure 3. STM32L5 discovery board

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UM2269 PowerShield modes and requirements

MS46932V1

(no software required)

USB: power supply only

10.365 uA

PowerShield

+ target board

Host: PC, ...

2 PowerShield modes and requirements

The PowerShield features up to three modes.

2.1 Standalone mode

This mode is available only on standalone board X-NUCLEO-LPM01A.

PowerShield is controlled with board buttons, joystick and LCD display.

It must be connected to a USB port only to get power supply from USB (does not use USB data).

This mode can be used for quick measurements with basic settings, or for demonstrations.

Figure 4. PowerShield in standalone mode

Requirements:

• No communication interface requirement: user buttons and LCD displays are available

on board

• Power supply: 5 V must be provided either by:

– An USB connector:

a) Computer: in this case, USB enumeration is performed but USB remains

unused.

b) Charger or power bank: in this case, no USB enumeration is performed.

– A generic connector (to input 5 V):

a) External power supply

b) Battery

– Arduino connector:

a) Shield Lithium Arduino (Arduino pin +5 V)

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PowerShield modes and requirements UM2269

MS46933V1

COM port terminal

PowerShield > PowerShield >

USB: power supply

and data

Contr host

PowerShield

+ target board

Host: PC, ...

2.2 Controlled by host mode with commands sent by a COM port terminal

Host computer controls PowerShield through USB VCP (Virtual COM port).

The interface is a standard terminal.

This mode can be used for quick measurements with customized settings or for automation of tests, by sending a script with PowerShield commands.

Figure 5. PowerShield in controlled by host mode with commands sent

by a COM port terminal

Requirements:

• Computer driver for USB VCP (Virtual COM port) "STM32 Virtual COM Port Driver".

Refer to driver STSW-STM32102 on STMicroelectronics web site www.st.com.

Note: On operating system Microsoft Windows 10, this driver is optional (since

PowerShield FW revision 1.0.2). By default, PowerShield can use the operating system USB VCP driver. STMicroelectronics USB VCP driver can be installed, in this case it takes priority over operating system driver.

• Software terminal (large variety of free terminals available on the Internet)

2.3 Controlled by host mode with commands sent by a GUI

PowerShield is controlled from host computer through USB VCP (Virtual COM port).

The interface is a dedicated GUI software.

This mode can be used to benefit of full capability of PowerShield measurement data: graphical data outcomes, statistical data.

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UM2269 PowerShield modes and requirements

MS46934V1

PowerMonitor software

USB: power supply

and data

Contr host

PowerShield

+ target board

Host: PC, ...

Figure 6. PowerShield in controlled by host mode with commands sent by a GUI

Requirements:

• Computer driver for USB VCP (Virtual COM port) "STM32 Virtual COM Port Driver".

Refer to driver STSW-STM32102 on STMicroelectronics web site www.st.com.

Note: On operating system Microsoft Windows 10, this driver is optional (since

• STMicroelectronics PowerShield GUI software STM32CubeMonitor-Power. Refer to

user manual STM32CubeMonitor-Power software tool for power and ultra-low-power measurements (UM2202).

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PowerShield standalone mode UM2269

3 PowerShield standalone mode

The communication interface available on board features:

• Two buttons:

– Reset

– Enter / Start

• One joystick.

The joystick embeds five push buttons: four directions and one in the center of joystick. The button in the center of joystick has the same function as button “ENTER” of keyboard.

• One LCD display: Monochrome, two lines of 16 characters

Note: A third button “reset” is available on board. It is not used as communication interface, but to

perform a reset of PowerShield FW (similar to unplug and plug the board power supply).

The following scheme describes standalone mode interface navigation.

1) PowerShield power-up

Welcome message for approximately two seconds.

PowerShield waits for user action.

Wait two seconds

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UM2269 PowerShield standalone mode

2) Acquisition mode dynamic: starts measurement and views different data (average, power, energy, …)

From measurement stopped: Button “enter”:

When user presses on button “enter”, PowerShield powers-up supply of target board and starts measurement.

Default parameters: – Power-up board, voltage: 3.0 V – Integration time: 1 s First line {voltage, current} is always displayed. Voltage and current are instantaneous values (0.1 s

averages). Second line displays different data, circularly: – Current average with integration time – Current max – Current min – Power (Watt) – Energy (Joule) with integration time – ULP bench score: calculation of score depending on

energy. Prerequisite: board target must run an ULP bench compliant program

– Temperature

Joystick down

(Joystick up doing the same in reverse order)

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PowerShield standalone mode UM2269

3) Acquisition mode static: starts measurement and views data

From measurement stopped: Button “enter”:

To start a new acquisition without switching-off the power supply of target: press joystick up or down

4) Acquisition mode dynamic and static: stops and starts new measurement

Button “enter” toggles stop and start measurement.

Wait few tens of ms

From measurement ongoing: Button “enter”:

When measurement is stopped, power supply of target is switched-off.

From measurement stopped: Button “enter”:

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5) Changes measurement settings: configuration menu. Rolling menu with configuration items one by one. Each item has few parameters selectable. Cursor moving: joystick to the right (after last parameter,

roll back to first parameter). Back (Exit from configuration menu): joystick to the left.

6) Changes configuration: voltage Applies for acquisition mode: dynamic and static. Parameters: – 1.8 V – 2.4 V – 3.0 V – 3.3 V

5) Integration time. Applies for acquisition mode: dynamic. Parameters: –1 s – 10 s – 100 s In data display, “Iavg xxx” and “Energ xxx” show the

selected value.

8) Change configuration: acquisition mode. Parameters: – Dynamic (default) – Static

9) Changes configuration: trigger source. Applies for acquisition mode: dynamic and static. Parameters: – None – Board Arduino connector D7 (other name: EXT_A)

10) Changes configuration: trigger delay. Applies for acquisition mode: dynamic and static. Parameters: – None – 0.1 s –1 s – 10 s

11) Changes configuration: current threshold. Applies for acquisition mode: dynamic. Parameters: – None –1 mA – 10 mA

12) Changes configuration: temperature unit. Parameters: – Deg Celsius – Deg Fahrenheit

Joystick to the right

Joystick down

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PowerShield standalone mode UM2269

13) Error message check and release.

When LED red is turned-on, it indicates that an error is present.

From main screen, moves joystick to the left allows the user to check error message.

The message remains displayed for 4 s, then error status is released: message cleared, LED red turned-off.

From main screen (all except configuration menu):

Joystick to the left: Case of no error:

Message displayed 1s

Case of error present:

Message displayed 4s

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