06/26/2019 at 01:27 •
I redesign project hardware board to single PCB and test first PCBWay manufactured board version successifully.
Also reduced PCB board size and upload latest schematics, PCBs and gerber files to project files.
This new board includes FTDI chip directly on same board and I put pull down resistor array on I/O unused RAM ports.
Now I solve bugs into AVR microcontroller firmware to work with external RAM, and create a simple C# PC program to send any data to RAM.
09/02/2017 at 18:50 •
Improve memory addresses
Make better use of the address space to increase the capacity of the solution. We currently only use the lower bytes of each memory location.
IDT SRAM Chip have 16 bit data bus, and now only use first byte. Can multiplex data on the same chip address but get @13 or @11 for detect change byte for R/W.
Meanwhile I testing data transfer with MCU and Dragon Computer: