NAME

       eppfpga - Baycom EPP modem with FPGA configuration/diagnostics tool

SYNOPSIS

       eppfpga [ -vh ] [-p portaddr] [-m modestr] [-t test]

DESCRIPTION

       eppfpga  is the configuration and diagnostics utility for the Baycom EPP modem.  It can be
       used to download the FPGA ``firmware'' or to execute various tests.  This utility is  also
       needed during ifconfig bcex up and therefore should reside in /sbin.

OPTIONS

       eppfpga accepts the following options:

       -h     Display an overview of the available command line parameters and exit.

       -v     Increases the verbosity of the output. May be cumulated.

       -p     Specifies  the  base address of the EPP capable parallel port to which the modem is
              connected. Use the 0x prefix to specify hexadecimal numbers.

       -m     Specifies various ``firmware'' options.

       -t     Execute the named test. Tests may be stopped by pressing CTRL-C.

FIRMWARE OPTIONS

       intclk uses FPGA internal clock; don't use if an external oscillator is on board.

       extclk uses the external oscillator; recommended if the internal modem  is  used,  as  the
              frequency of the FPGA oscillator is not accurate enough.

       intmodem
              uses the internal modem

       extmodem
              uses a DF9IC type modem connected to the high speed modem connector

       divider=x
              sets the clock divider for the internal modem (baud=fquartz/16/divider)

       loopback
              sets an internal modem loopback

       extstat
              allows extended status readback

       noextstat
              disallows extended status readback

       pttmute
              mutes modulation signal output when PTT is off (default)

       nopttmute
              modulation signal is continuously output

TESTS

       ram    tests the on board SRAM using boundary scan

       bled   tests the on board LED's using boundary scan; disconnect PTT during the test.

       dac    tests the on board DAC using boundary scan

       led    tests the CON and STA leds using EPP address write

       ledfast
              tests the CON and STA leds using fast EPP address write

       berr   performs a BER test using the complete adapter. An external loopback is required.

       berrv  performs  a BER test using the complete adapter. Also prints out the received bits.
              An external loopback is required.

       ccnt   frequency counter using the check firmware

       cdac   fast DAC test using the check firmware

       cram   fast RAM test using the check firmware

       cled   LED test using the check firmware

SEE ALSO

       ifconfig (8), sethdlc (8),
       linux/drivers/net/hamradio/baycom_epp.c

AUTHOR

       eppfpga was written by Thomas Sailer, HB9JNX/AE4WA (sailer@ife.ee.ethz.ch).