---
name: "supply"
section: "9"
platform: "linux"
package: "linuxcnc-uspace"
version: "1:2.9.4-2+deb13u1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/supply"
---

# supply(9)

set output pins with values from parameters (obsolete)

## NAME

supply - set output pins with values from parameters (obsolete)

## SYNOPSIS

**loadrt supply num\_chan=***num*

## DESCRIPTION

**supply** was used to allow the inputs of other HAL components to be manipulated for testing purposes.  When it was written, the only way to set the value of an input pin was to connect it to a  signal and connect that signal to an output pin of some other component, and then let that component write the pin value. **supply** was written to be that "other component".  It reads values from parameters (set with the HAL command **setp**) and writes them to output pins.

Since **supply** was written, the **setp** command has been modified to allow it to set unconnected pins as well as parameters. In addition, the **sets** command was added, which can directly set HAL signals, as long as there are no output pins connected to them.  Therefore, **supply** is obsolete.

**supply** supports a maximum of eight channels.  The number of channels actually loaded is set by the **num\_chan** argument when the module is loaded.  If **numchan** is not specified, the default value is one.

## FUNCTIONS

- **supply.***N***.update** (uses floating-point)

  Updates output pins for channel *N*.

## PINS

- **supply.***N***.q** bit out

  Output bit, copied from parameter **supply.***N***.d**.

- **supply.***N***.\_q** bit out

  Output bit, inverted copy of parameter **supply.***N***.d**.

- **supply.***N***.variable** float out

  Analog output, copied from parameter **supply.***N***.value**.

- **supply.***N***.\_variable** float out

  Analog output, equal to -1.0 times parameter **supply.***N***.value**.

- **supply.***N***.d** bit rw

  Data source for **q** and **\_q** output pins.

- **supply.***N***.value** bit rw

  Data source for **variable** and **\_variable** output pins.