Subversion Repositories wishbone_spi_flash_interface

1. All of the SPI FLASH interface modules are in "spi_pack.vhd"

2. The file "spi_flash_sim.txt" is used to define the contents of the

   simulated SPI FLASH device which is used in the testbench.

3. The testbench is part of the larger design

   "spi_flash_interface_used_in_larger_FPGA_setting_for_register_initialization"

   which is a .zip file containing many VHDL source files.

   The SPI FLASH interface is used in the larger design to automatically

   read the SPI FLASH, and provide ASCII command characters through a UART

   which feeds a serial command interface.

   The testbench essentially emulates a UART by reading a file.  The serial

   characters are used to issue commands which can exercise the various

   parts of the design.  The file which feeds the commands to the design

   under test is called "rs232_test_in.txt" and the results file of

   serial response characters is "rs232_test_out.txt"  The files are

   contained within the /testbench subfolder.

   The operation of the larger design is too complicated to explain here,

   but please read the code in spi_pack.vhd, it has comments that explain

   many aspects of the unit's operation.

   Enjoy!

   John Clayton

   September 6th, 2013.