libsimpleio release 2.24736.1 Wed Mar 25 07:14:37 AM PDT 2026 (#1836)
* libsimpleio release 2.24736.1 Wed Mar 25 07:14:37 AM PDT 2026 Corrected Raspberry Pi 5 PWM output designators. With kernel 6.12, we are back to pwmchip0. * libsimpleio drop 2.24736.1 * libsimpleio release 2.24736.1 Thu Mar 26 08:59:46 AM PDT 2026 Corrected Raspberry Pi 5 PWM output designators. With kernel 6.12, we are back to pwmchip0.
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pmunts
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name = "libsimpleio"
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version = "2.24736.1"
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description = "Linux Simple I/O Library"
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website = "https://github.com/pmunts/libsimpleio"
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authors = ["Philip Munts"]
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maintainers = ["Philip Munts <phil@munts.net>"]
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maintainers-logins = ["pmunts"]
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licenses = "BSD-1-Clause"
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long-description = """
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# Introduction
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This crate provides an Ada binding to the [Linux Simple I/O
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Library](https://github.com/pmunts/libsimpleio), *aka* **libsimpleio**.
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# Linux Simple I/O Library
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**libsimpleio** is an attempt to encapsulate (as much as possible) the
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ugliness of Linux I/O device access. It provides services for the
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following types of I/O devices:
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- [Industrial I/O
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Subsystem](https://wiki.analog.com/software/linux/docs/iio/iio) A/D
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(Analog to Digital) Converter Devices
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- [Industrial I/O
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Subsystem](https://wiki.analog.com/software/linux/docs/iio/iio) D/A
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(Digital to Analog) Converter Devices
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- GPIO (General Purpose Input/Output) Pins
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- Raw HID (Human Interface Device) Devices
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- I2C (Inter-Integrated Circuit) Bus Devices
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- PWM (Pulse Width Modulated) Output Devices
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- [Remote I/O
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Protocol](https://repo.munts.com/libsimpleio/doc/RemoteIOProtocol.pdf)
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Devices
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- Serial Ports
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- SPI (Serial Peripheral Interface) Bus Devices
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- [Stream Framing
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Protocol](https://repo.munts.com/libsimpleio/doc/StreamFramingProtocol.pdf)
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Devices
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- TCP and UDP over IPv4 Network Devices
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- Watchdog Timer Devices
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**libsimpleio** exports a small number of C wrapper or shim functions.
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These shim functions present a more coherent API (Application
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Programming Interface) than Linux kernel **`ioctl()`** services and the
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myriad other different Linux device I/O API's. The **libsimpleio** shim
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functions are designed to be easily called from Ada, C++, C#, Java, Free
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Pascal and other programming languages.
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The **`man`** pages specifying the **libsimpleio** API (Application
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Programming Interface) are available for viewing at
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<https://repo.munts.com/libsimpleio/doc/libsimpleio.html>.
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# Ada Binding for the Linux Simple I/O Library
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The Ada binding consists of several software component layers.
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The bottom software component layer consists of the **C shim functions**
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discussed in the previous section.
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The next software component layer consists of **binding packages** that
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declare the C shim functions as Ada procedures. Each of the binding
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packages corresponds to a single C source file (*e.g.* package
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**`libadc`** corresponds to **`libadc.c`**). Each of the C shim
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functions are declared as external Ada procedures using
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**`pragma Import`**. The Ada procedure names do not necessarily match
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the C function names (*e.g.* the C function **`ADC_Open()`** is declared
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as Ada procedure **`libadc.Open`**). Many of the binding packages also
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declare constants as well (*e.g.* **`DIRECTION_INPUT`** in
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**`libgpio.ads`**).
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With very few exceptions, you will never need to directly call any of
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the procedures nor reference any of the constants declared in the
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**`libxxx`** binding packages.
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The next software component layer consists of **object packages** that
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declare OOP (Object Oriented Programming) object types and methods for
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each of the I/O subsystems. This layer uses Ada interface types,
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access-to-interface types, and private tagged records extensively.
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For example, the package **`GPIO`** defines an interface type
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**`PinInterface`**, an access to **`PinInterface`** type named
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**`Pin`**, and primitive operation subprograms **`Get`** and **`Put`**.
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The child package **`GPIO.libsimpleio`** declares a private tagged
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record type **`PinSubclass`** that *implements* **`GPIO.PinInterface`**,
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subprograms **`Get`** and **`Put`** that are required to implement
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**`GPIO.PinInterface`**, and a constructor function **`Create`** that
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returns an **`GPIO.Pin`** access value.
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Every package that implements **`GPIO.PinInterface`** will also declare
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a constructor function **`Create`** that returns **`GPIO.Pin`**.
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This architecture allows code similar to the following fragment:
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MyPins : array (1 .. 3) of GPIO.pin;
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GPIO(1) := GPIO.libsimpleio.Create(...);
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GPIO(2) := GPIO.UserLED.Create(...);
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GPIO(3) := GPIO.PWM.Create(...);
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The three GPIO pins can be stored in the same array and manipulated in
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exactly the same manner even though the hardware implementation for each
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pin is radically different.
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The topmost software component layer consists of **device packages**
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that implement support for particular I/O devices and are built upon the
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lower layers. Most of the device packages correspond to integrated
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circuits, such as the [PCA9534 I2C GPIO
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Expander](https://www.nxp.com/products/interfaces/ic-spi-serial-interface-devices/ic-general-purpose-i-o/8-bit-ic-bus-and-smbus-low-power-i-o-port-with-interrupt:PCA9534).
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A few implement support for boards or modules, such the [Grove
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Temperature
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Sensor](https://www.seeedstudio.com/Grove-Temperature-Sensor.html)
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module.
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"""
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tags = ["embedded", "linux", "libsimpleio", "remoteio", "beaglebone",
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"pocketbeagle", "raspberrypi", "raspberry", "pi", "adc", "dac", "gpio",
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"hid", "i2c", "motor", "pwm", "sensor", "serial", "servo", "spi", "stepper",
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"watchdog", "wioe5"]
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project-files = ["libsimpleio.gpr"]
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[available."case(os)"]
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'linux' = true
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"..." = false
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[[forbids]]
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# This crate contains the functionality of the following crates:
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mcp2221 = "*"
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remoteio = "*"
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wioe5_ham1 = "*"
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wioe5_ham2 = "*"
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wioe5_p2p = "*"
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[[actions."case(os)".linux]]
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type = "post-fetch"
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command = ["sh", "-c", "./postfetch"]
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[origin]
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hashes = [
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"sha256:f7326c67d136095f5029d6dee3e02c8ec8f22ef3882754699e2f5d190d7069a2",
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"sha512:c12daa99beea7068867c070c47c0043a07bfd8127de0cc44b53bd3bd69dd83818eecff8d34e36d1cc2ddfdbce4d4f7c47ae22b103be505a6ab551569aaa0d0e2",
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]
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url = "https://raw.githubusercontent.com/pmunts/alire-crates/2309c881329907da24e8ee31cbbdd4d1a2b832cf/libsimpleio/libsimpleio-2.24736.1.tbz2"
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