Cypress CY3674, User Manual

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88 EZ-USB Development Kit User Guide, Doc. # 001-66390 Rev. *D
EZ-USB Development Kit Firmware Examples
8.7.4 Binding Cypress USB Driver for the Downloaded Firmware Image
The Bulkext firmware uses vendor-class (0xFF) with VID/PID-0x04B4/1004. This example should
bind with the Cypress-generic USB driver, cyusb.sys, and driver information file, cyusbfx1_fx2lp.inf
which contains the relevant VID/PID of this example. Follow the procedure outlined in Binding
Cypress USB Driver to EZ-USB Development Board on page 45 to manually bind the driver using
the Windows Hardware Wizard. If the binding process is performed for any one of the previous firm-
ware examples, the process can be skipped for this example.
8.7.5 Testing the Bulkext Firmware Functionality
The example firmware should be tested in a similar manner as Bulkloop example using Cyconsole
or CyControlCenter.
8.8 EP_Interrupts Example
8.8.1 Description
The EP_interrupts example works in a similar manner as Bulkloop on EZ-USB FX2LP.The major
differences include addition of a 64-byte EP1 as Bulk OUT/IN endpoint to the existing list of 4 end-
points- EP2, EP4, EP6, and EP8.The endpoints are re-armed using their respective interrupt service
routines. Following are the interrupts for each of these endpoints which are used to schedule the
data transfers.
■
EP1-64 byte Bulk OUT/IN - ISR_Ep1in() and ISR_Ep1out()
■
EP2-512 byte Bulk OUT - ISR_Ep2inout()
■
EP4-512 byte Bulk IN - ISR_Ep4inout()
■
EP6-512 byte Bulk OUT - ISR_Ep6inout()
■
EP8-512 byte Bulk OUT - ISR_Ep8inout()
8.8.2 Building EP_Interrupts Firmware Example Code for EZ-USB RAM and EEPROM
Click on Build Target button at the top right corner of the IDE. The total Code bytes of
EP_Interrupts firmware example is less than 4k code limit Keil uVision2 IDE provided along with the
kit. The output of the Build Target is EP_Interrupts.hex and EP_Interrupts.iic files
8.8.3 Method to Program EP_Interrupts Firmware Image to EZ-USB Internal RAM and
EEPROM
Refer to section Method to Download Firmware Image to EZ-USB Internal RAM Memory on page 69
and Method to Download Firmware Image to External I2C EEPROM on page 69 and follow similar
procedure to download EP_Interrupts.hex to RAM memory and EP_Interrupts.iic to Large
EEPROM using Cyconsole/CyControlCenter.The EP_Interrupts.hex and EP_Interrupts.iic files
are located at <Installed_directory>\<Version>\Firmware\EP_Interrupts. After downloading, the firm-
ware re-enumerates with PC using its internal VID/PID-0x04B4/0x1004.
8.8.4 Binding Cypress USB Driver for the Downloaded Firmware Image
The EP_Interrupts firmware uses vendor class (0xFF) with VID/PID-0x04B4/1004.This example
should bind with Cypress generic USB driver cyusb.sys and driver information file
cyusbfx1_fx2lp.inf, which contains the relevant VID/PID of this example. Follow the procedure out-
lined in section
Binding Cypress USB Driver to EZ-USB Development Board on page 45 to manually
bind the driver using Windows Hardware Wizard. If the binding process is performed for anyone of
the previous firmware examples the process can be skipped for this example.