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www.cypress.com Document No. 001-76348 Rev. ** 1

AN76348

Migrating from EZ-USB

FX2LP™ Based Design to EZ-USB FX3 Based

Design

Author: Rama Sai Krishna V

Associated Project: No

Associated Part Family: CYUSB3014

Software Version: None

Related Application Notes: For a complete list of the application notes, click here.

If you have a question, or need help with this application note, contact the author at

rskv@cypress.com

Abstract

AN76348 tells you how to modify the top-level application to migrate an EZ-USB

design based on FX2LP™ to one

based on FX3™. This application note highlights the differences between FX3 and FX2LP in architecture, hardware

level, and firmware framework using a bulkloop example.

Contents

Introduction ....................................................................... 2

Architectural Differences ................................................... 2

Serial Interfaces ................................................................ 2

GPIF versus GPIF II .......................................................... 2

Differences in Hardware Level .......................................... 3

Booting Options ............................................................ 3

Crystal / Clock .............................................................. 3

Power Supply Configurations and Decoupling

Capacitance ................................................................. 3

Differences in Software Level ............................................ 4

Development Tools ...................................................... 4

Applications in PC ........................................................ 4

FX2LP and FX3 Firmware Framework .............................. 4

BulkLoop Example on FX2LP ........................................... 4

Programmer’s View of FX3 ............................................... 5

FX3 Firmware Stack .......................................................... 6

Firmware Framework.................................................... 6

Firmware API Library .................................................... 6

Embedded Real Time OS............................................. 6

BulkLoop Example on FX3 ................................................ 6

Tool Chain Initialization ................................................ 7

Device Initialization ....................................................... 7

Application Definition .................................................... 8

Application Code .......................................................... 8

Application Thread ....................................................... 9

Debug Initialization ....................................................... 9

Application Initialization .............................................. 10

Available Collateral ......................................................... 11

Summary of content (13 pages)

PAGE 1
AN76348 Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design Author: Rama Sai Krishna V Associated Project: No Associated Part Family: CYUSB3014 Software Version: None Related Application Notes: For a complete list of the application notes, click here. If you have a question, or need help with this application note, contact the author at rskv@cypress.com Abstract ® AN76348 tells you how to modify the top-level application to migrate an EZ-USB design based on FX2LP™ to one based on FX3™.
PAGE 2
Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design Introduction Serial Interfaces Cypress EZ-USB FX3 is the next generation USB 3.0 peripheral controller, which provides highly integrated and flexible features that enable developers to add USB 3.0 functionality to any system. More details on the serial interfaces supported by FX2LP and FX3 are listed in the following table.
PAGE 3
Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design Based on the clocking option that is used, the FSLC[2:0] lines can be tied to power, through a weak pull-up resistor, or to ground. The following table shows the values of FSLC[2:0] for the different clocking options. Differences in Hardware Level Booting Options 2 EZ-USB FX2LP can boot from USB and I C only. But EZ-USB FX3 can load boot images from various sources, selected by the configuration of the PMODE pins.
PAGE 4
Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design In the case of FX2LP, we need to provide 0.1-μF ceramic capacitors to decouple device power input pins. The specific recommendation for the ceramic capacitor nearest to each EZ-USB FX3 power pin is given in the following table. Cap Value (µF) Number of Caps Pin Name 0.1, 0.01 4 of each VDD 0.1, 2.2 1 of each AVDD 0.1, 22 1 of each U3TXVDDQ 0.1, 22 1 of each U3RXVDDQ 0.1, 0.01 1 of each CVDDQ 0.1, 0.
PAGE 5
Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design and you can read the same data back from EP6. Similarly you can send some bytes to EP4 and read it back from EP8.  The two other important entities that are external to the FX3 are: Programmer’s View of FX3 The FX3 comes with the easy-to-use EZ-USB tools providing a complete solution for fast application development. Cypress EZ-USB FX3 is a user programmable device and is delivered with a complete software development kit.
PAGE 6
Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design FX3 Firmware Stack Powerful and flexible applications can be rapidly built using FX3 firmware framework and FX3 API libraries. Firmware Framework The firmware (or application) framework has all the startup and initialization code. The firmware also contains the individual drivers for the USB, GPIF, and serial interface blocks.
PAGE 7
Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design goto handle_fatal_error; } The firmware entry function performs the following actions:  Invalidates the caches (which were used by the bootloader)  Initialize the memory management unit (MMU) and the caches   As part of the device initialization: a. The CPU clock is setup. A NULL is passed as an argument for CyU3PDeviceInit() that selects the default clock configuration.
PAGE 8
Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design CyU3PDeviceConfigureIOMatrix function (in the library) is invoked. 4. The final step in the main() function is invocation of the OS. The invocation is done by issuing a call to the CyU3PKernelEntry() function. This function is defined in the library and is a non-returning call. This function is a wrapper to the actual ThreadX OS entry call. This function: a. Initializes the OS b.
PAGE 9
Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design /* Consumer endpoint configuration */ apiRetStatus = CyU3PSetEpConfig(CY_FX_EP_CONSUMER, &epCfg); if (apiRetStatus != CY_U3P_SUCCESS) { CyU3PDebugPrint (4, "CyU3PSetEpConfig failed, Error code = %d\n", apiRetStatus); CyFxAppErrorHandler (apiRetStatus); } /* Create a DMA Auto Channel between two sockets of the U port. * DMA size is set based on the USB speed. */ dmaCfg.size = size; dmaCfg.count = CY_FX_BULKLP_DMA_BUF_COUNT; dmaCfg.
PAGE 10
Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design Application Initialization The application initialization consists of the following steps: USB Initialization  The USB stack in the FX3 library is first initialized. The initialization is done by invoking the USB Start function. /* Start the USB functionality */ apiRetStatus = CyU3PUsbStart();  The fast enumeration is the easiest way to setup a USB connection, where all enumeration phase is handled by the library.
PAGE 11
Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design CyFxBulkLpApplnStop (); } break; default: break; Available Collateral } } D e ve l o p m e n t K i t ® CYUSB3KIT-001 EZ-USB FX3™ Development Kit DMA Setup The DMA channel transfer is enabled: /* Set DMA Channel transfer size */ apiRetStatus = CyU3PDmaChannelSetXfer (&glChHandleBulkLp, CY_FX_BULKLP_DMA_TX_SIZE); if (apiRetStatus != CY_U3P_SUCCESS) { CyU3PDebugPrint (4, "CyU3PDmaChannelSetXfer Failed, Error code = %d\n", apiRetStatus);
PAGE 12
Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design Document History ® Document Title: Migrating from EZ-USB FX2LP™ Based Design to EZ-USB FX3 Based Design – AN76348 Document Number: 001-76348 Revision ** ECN 3565979 www.cypress.com Orig. of Change RSKV Submission Date 03/30/2012 Description of Change New application note Document No. 001-76348 Rev.
PAGE 13
Migrating from EZ-USB® FX2LP™ Based Design to EZ-USB FX3 Based Design Worldwide Sales and Design Support Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office closest to you, visit us at Cypress Locations. PSoC® Solutions Products Automotive cypress.com/go/automotive psoc.cypress.com/solutions Clocks & Buffers cypress.com/go/clocks PSoC 1 | PSoC 3 | PSoC 5 Interface cypress.