Microsemi UG0648 Motor Control Libero Project User Guide

: June 9, 2024
: Microsemi

Table of Contents

Microsemi UG0648 Motor Control Libero Project
Revision History
About this Guide
Running the Libero Project
- Running the Motor Control Design
Project Description
Modifying the Design
Documents / Resources

Microsemi UG0648 Motor Control Libero Project

Microsemi-UG0648-Motor-Control-Libero-Project-PRODUCT

Revision History

Revision 3.0

There were no changes to the technical content in revision 3.0 of this document.

Revision 2.0

The following is a summary of the changes in revision 2.0 of this document.
Updated the Opening the Libero Project, page 3 section for the updated screen shots (SAR 80524).
Added the Downloading Cores from Libero, page 4 section (SAR 80524).
Updated the Importing Cores, page 4 section for download feature (SAR 80524).
Added BLDC Sensorless and Stepper Motor Project, page 12, BLDC Encoder Project, page 13, and BLDC with Hall Project, page 14 (SAR 80524).

Revision 1.0

Revision 1.0 was the first publication of this document.

About this Guide

Purpose

This document familiarizes users with the motor control design in the Libero® System-on-Chip software user guide. It describes the steps for importing cores, running the design, editing I/O constraints, editing timing, and describes the motor control project.

Intended Audience

This document is not a complete Libero software user guide. It is intended for users who are unfamiliar with the Libero SoC tool to get started with motor control design.

Reference

Ensure that the latest version of Libero is downloaded from http://www.microsemi.com/products/fpga-soc/design-resources/design-software/libero-soc and installed.

Download the Motor Control project.

For more information on Microsemi’s Motor Control Solutions, visit http://www.microsemi.com/applications/motor-control#solutions.
Note : The downloaded project is based on encrypted IP blocks. It causes the design flow process to run up to 5x slower than an unencrypted (plaintext) IP.

Running the Libero Project

This section describes how to run the motor control project in Libero.

Opening the Libero Project

The following steps describe the procedure for opening the libero project:

Launch the installed Libero software.
To open the downloaded project, click Project -> Open Project; browse to the location and select the project file as shown in the following figure and click Open.
- A pop-up appears, as shown in the following figure.
Click Dismiss, and the Libero window is ready for use.

The Log window displays error messages of missing cores as shown in the following figure. These cores can be directly downloaded from Libero or can be imported from the downloaded contents.

Downloading Cores from Libero

The following steps describe how to download IP cores from Libero SoC:

Click the Catalog tab, as shown in the following figure. If the IP cores are not already available in the Libero SoC vault, they are displayed in grey.
Select all the Motor Control IP cores by clicking on each of them holding the Ctrl key. Right-click the selected IP cores and click Download to download the cores.

Importing Cores

The motor control IP cores can also be imported from the downloaded folder.
Note: It is recommended to download the IP cores directly from Libero SoC as it has the latest version of cores.

Click the Catalog tab as shown in the following figure.
On the top right corner of the screen, click Settings. In the drop-down list, click Add core to the vault.
In the following screen, browse to the cores folder (unzipped from the downloaded file). Select all the *.cpz files, and then click Open. After importing the files successfully, a message appears as shown in the following figure.
After the cores are imported, the Catalog tab must resemble the following figure. Expand the Solutions-MotorControl tab to view the cores.

Running the Motor Control Design

The following steps describe how to verify the source directory for the eNVM content (.hex file).

In the Design Flow tab, double-click Update eNVM Memory Content as shown in the following figure.
- This opens the eNVM Update Tool pop-up window as shown in the following figure.
In the eNVM Update Tool window, select the User Client (MSS_data) by clicking on it. Then click Edit.
- This opens the “Modify Data Storage Client” pop-up window as shown in the following figure.
In the “Modify Data Storage Client” window. Click Browse, select .hex file from: project folder -> SoftConsole -> Motor_Control_5_1_0 -> Motor_Control_sb_MSS_CM3_app -> Release (Motor_Control_sb_MSS_CM3_app.hex). Click Ok to close the “Modify Data Storage Client”, and click Ok again to close the eNVM Update Tool window.
Connect FlashPro4 to the board and switch ON the switch SW2.
In the Design Hierarchy tab, double-click Run PROGRAM Action to program the device as shown in the following figure.
If the programming is successful, it is indicated by a green mark as shown in the following figure. The motors can be run using the GUI as described in the DG0598: SmartFusion2 Dual-Axis Motor Control Starter Kit Demo Guide.

Project Description

Select the Design Hierarchy tab as shown in the following figure. This window shows various modules in the design. The module in bold is the root as shown in the following figure. Generally, the root module and other modules listed under root module are synthesized. Microsemi-UG0648-Motor-Control-Libero-
Project-FIG-13

BLDC Sensorless and Stepper Motor Project

The following steps describe how to create a BLDC sensorless and stepper motor project:

Double-click the MC_System_top. The SmartDesign tab opens with MC_System_top, which instantiates the BLDC Axis, Stepper Axis and MC_System block as shown in the following figure. The MC_System block contains the microcontroller subsystem (MSS).
In the Design Hierarchy tab, expand the MC_System_top to show the modules instantiated under the module and double-click Bldc_Axis to open the Bldc_Axis module, as shown in the following figure. Alternatively, double-click Bldc axis in the SmartDesign window to open the Bldc_Axis module. The Bldc_Axis tab is displayed with the visual connections of the blocks instantiated within the Bldc_Axis.
Refer to AC445: Motor Control Design using SmartFusion2/IGLOO2 Devices Application Note for more information on BLDC Sensorless and Stepper Motor Project.

BLDC Encoder Project

The following steps explain how to create a BLDC encoder project:

Double-click MC_System_top on the left. The MC_System_top tab is displayed on the right with the design, which instantiates the BLDC Encoder Axis and MC_System blocks, as shown in the following figure. The MC_System block contains the microcontroller subsystem (MSS).
In the Design Hierarchy tab, expand the MC_System_top to show the modules instantiated under the module and double-click BLDC_Encoder_Axis, as shown in Figure 18. Alternatively, DoubleClick
- BLDC_Encoder_Axis in the SmartDesign window to open the BLDC_Encoder_Axis module.
- The BLDC_Encoder_Axis is displayed with the visual connections of the blocks instantiated within Bldc_Encoder_Axis.

BLDC with Hall Project

The following steps enable to create of a BLDC with a hall project:

Double-click MC_System_top on the left. The SmartDesign tab opens with MC_System_top on the right, which instantiates the BLDC_HALL_Axis and MC_System blocks, as shown in the following figure. The MC_System block contains the microcontroller subsystem (MSS).
In the Design Hierarchy tab, expand the MC_System_top to show the modules instantiated under the module and double-click BLDC_HALL_Axis to open, as shown in the following figure. Alternatively, double-click BLDC_HALL_Axis in the SmartDesign window to open the BLDC_HALL_Axis module. The BLDC_HALLAxis tab is displayed with connections of the blocks instantiated within BLDC HALL_Axis.

Description of Interfacing IPs

The APB3_IF block acts as a bridge between the MSS and the FPGA fabric blocks. Several parameters are computed in the MSS based on GUI inputs and passed to the fabric. This feature allows the designer to modify parameters without rerunning the FPGA flow. The fabric sends internal variables to the MSS for visualizing them in a GUI and debugging the design. The APB3 interface block is shown in the following figure.
The ADC interface block provides multi-bit data from an ADC device SPI port. It acts as an SPI master, while the ADC device works as a slave, providing motor current information to other blocks in the control algorithm. It also allows the designer to select the number of channels and the clock divider to provide the SPI clock (SCK). The ADC measurement block is shown in the following figure.
The three-phase Pulse width modulation (PWM) generation block generates three independent channels of complementary PWM, with features like configurable PWM period, dead time, and delay time.
These parameters are configured from the MSS through the APB3 interface. Depending on the driver device, complementary PWMs can be used. The three-phase PWM block is shown in the following figure.

In the Design Hierarchy window, double-click the Stepper Axis tab to open the Stepper Motor SmartDesign tab. It shows the interconnection between the blocks used in the stepper design. The Stepper design uses the ADC interface and uses two phases of the three phase PWM block.
To configure an IP block, double-click IP Block. A configuration window appears, which allows the designer to modify port widths and other constants. For example, if the FOC_Transforms block is to be configured, double click the foc_transforms_0 block. A configurator window opens, as shown in the following figure. For further information, refer individual IP user guides at http://www.microsemi.com/applications/motor-control#resources.
IP blocks are available as modules in the Project Catalogue for use in SmartDesigns. Select an IP in the catalog and drag it into a SmartDesign to instantiate the IP.
Drag SmartDesign blocks into other SmartDesign modules to re-instantiate them.
To re-use other modules (from other HDL files), identify the module in the Design Hierarchy tab and drag it into the required SmartDesign tab. In case the module must be re-used with different configuration settings in each instantiation, the module needs to be converted to SmartHDL. To convert a module into SmartHDL, right-click the module in the Design Hierarchy tab and click Create Core from HDL as shown in the following figure, and then drag the block into the desired places.

Note : SmartHDL files are represented with a symbol.

Modifying the Design

This section describes editing I/Os to run the design on a different board, editing timing constraints, and viewing reports generated by Libero SoC.

Editing I/O Configuration

The following steps describe the process of editing I/O configuration:

Click the Design Flow tab.
Use one of the following methods to edit I/O constraints:

Edit the I/O constraints .pdc file to edit the pin map, by clicking the constraint file, as shown in the following figure.
Double-click I/O Constraints under Edit Constraints, as shown in the following figure.
The I/O Editor window is displayed, as shown in the following figure. You can assign or re-assign device pins and modify the drive strength in a GUI window. After changing the configuration, click Commit and Check, as shown in the following figure.

Editing Timing Constraints

The following steps describe how to edit timing constraints:

Use one of the following methods to edit I/O constraints:

Edit the Timing constraints file (.sdc) shown in the following figure.
Double-click Timing Constraints as shown in the following figure.
This opens a GUI (SmartTime) to edit timing Constraints as shown in the following figure.

Generating and Viewing Reports

In the Menu bar, click Design -> Reports as shown in the following figure.
This opens the Reports tab, which contains all the reports generated while running the design, as shown in the following figure.
The resource utilization can be viewed in the compiled report. It helps analyze and decide:

Whether or not the design fits the device.
If any additional logic can be added to the existing design.
Whether or not the design can fit into a smaller device.

The timing report (resulting from Verify Timing) shows the minimum and maximum delay analysis. This delay analysis helps determine if the design will work without errors for the given clock constraint.

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Documents / Resources

| Microsemi UG0648 Motor Control Libero Project [pdf] User Guide
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