This example implements a gameport translator on the PIC16C765. The
firmware translates a gaming device plugged into the gameport to a USB
gaming device. The firmware is set up to translate the DexxaTM
eight-button gamepad. Changes to the firmware will be necessary
for a different gaming device.
This firmware translates a PS/2 mouse to a USB mouse. The translator
firmware is entirely interrupt driven (with the exception of sending the
data via USB to the host.) An interrupt is generated when the PS/2 start
bit is received, at which time the firmware will begin its receive routine.
In addition to this interrupt, every 168ms a timer overflow interrupts the
main program and implements one state of the mouse state machine. This
state machine handles sending bytes to and translating bytes received from
the PS/2 mouse automatically. All of this is done in the background while
the main program runs in the foreground. The only operation that the main
program implements is sending mouse data to the PC via USB.
a3load is 8051 firmware that can be used for uploading or downloading
to EZ-USB RAM (internal or external). It implements the vendor specific
command bRequest = 0xA3. The address to download/upload to/from is
specified in the wValue field of the SETUP packet and the length of
the transfer in the wLength field. The actual upload/download data
is transferred during the DATA stage of the SETUP transfer. This firmware
will function on all EZ-USB chips (EZ-USB, EZ-USB FX, FX2, FX2LP, FX1).
This directory contains the memtest 8051 firmware
for the Anchor Chips EZ-USB chip.
The purpose of this software is to test the different
memory segments in the Ez-Usb chip.
This example will output the string "good" on the 7 segment
LED if the mem test passes, or it will output the first address
where the memtest fails.
