usb-avr-cpld experiment board with FTDI FT232RL, ATMEGA88 & XC9572XL
T. Meissner 5989b1a505 added gpl-v2 license text 6 years ago
avr declaration of F_CPU now in the makefile, only check in the c-source, if it was forgotten 7 years ago
cpld change timespec name from TS_Clk_i to TS_XcClk_i 7 years ago
eagle initial commit of design rules for manufacturing the pcb at q-print 7 years ago
pics update to latest schematic & board revision, now version 0.1 which is 7 years ago
LICENSE.textile added gpl-v2 license text 6 years ago
README.textile added description of the 'cpld' which contains the cpld test design 7 years ago

README.textile

h1. "usb-avr-cpld":https://github.com/tmeissner/usb-avr-cpld

p(. A small experiment board with usb-connector, usb-serial bridge, avr controller & xilinx cpld

!https://lh5.googleusercontent.com/-Al2Op9EDc1Q/UGHuXh1WkdI/AAAAAAAABss/sLXzn2gTk9k/s0-d/usb-avr-cpld.jpg!

h3. Board's main parts:

* Ftdi FD232RL USB-UART bridge
* Atmel Atmega88
* Xilinx XC9572XL CPLD

h3. Test FW:

The folder "avr":https://github.com/tmeissner/usb-avr-cpld/tree/master/avr contains a avr-gcc project with test routines for the Atmega88 controller.
It checks for the interfaces to the other devices. At the moment, a simply uart loop to the FT232RL
is implemented.

The folder "cpld":https://github.com/tmeissner/usb-avr-cpld/tree/master/cpld contains a xilinx ise / ghdl project with test design for the CPLD.
It checks for the interfaces to the other devices. At the moment, putting a simple "10101" pattern on the gpio pins is implemented.