Cypress Semiconductor CY7C1399B Manual de usuario descargar pdf (Pagina 9)

AN57322

November 4, 2009 Document No. 001-57322 Rev. ** 9

12. Go to Project > Options for Target ‘Target1’. Select

the Output tab and check the Create Hex File box.

13. Click the BL51 Locate tab and locate the code and

xdata as shown.

14. Build the project by clicking the Rebuild all target

files button . Make sure the code build is error-

free. Click OK for warnings.

15. If the build is successful, the following screen appears

in the output window. The firmware build is ready and

you have to add firmware for the GPIF transfers.

Firmware to Interface with SRAM

The following sections of firmware are added to the

FX2_SRAM_GPIF.c file:

 Initialization code in the TD_Init() routine.

 Routines to turn LEDs on and off in TD_Poll() to

indicate that the firmware is running.

 Vendor specific commands to do the following:

 Trigger a GPIF FIFO Write transfer to write to the

SRAM (handles both single and block writes)

 Trigger a GPIF FIFO Read transfer to read from

the SRAM (handles both single and block reads)

The code for this is provided in Appendix A of this

document. Copy the code to the FX2_SRAM_GPIF.c file

in the appropriate positions. For example, replace the

existing TD_poll() with the one in this document. Also copy

all the #defines and functions related to LEDs.

Rebuild the project. If you are using the 4K evaluation Keil

tools, it might complain about the 4K code size limit. In this

case, comment out the other vendor commands that are

remnants from the bulkloop example and then rebuild the

project.

[+] Feedback

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Sin comentarios

Cypress Semiconductor CY7C1399B Manual de usuario Pagina 9