---
name: "eppfpga"
section: "8"
platform: "linux"
package: "baycomepp"
version: "0.10-18"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/eppfpga"
---

# eppfpga(8)

Baycom EPP modem with FPGA configuration/diagnostics tool

## 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).