> For the complete documentation index, see [llms.txt](https://sandbox-docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sandbox-docs.verifone.com/s-adk-5.1-programmers-guide/readme/files/dir_078666aaafc812ef0db017f3778c7af8/dir_1de2fc103c37f88e22147e598fb72856/dir_89bef91478a81057cacdced47a78082e/gpio_8h.md).
# gpio.h
[Data Structures](#nested-classes) | [Namespaces](#namespaces) | [Macros](#define-members) | [Enumerations](#enum-members)
[Go to the source code of this file.](/s-adk-5.1-programmers-guide/gpio_8h_source.md)
| | |
| --------------- | ------------------------------------------------------------------------------------------------------------ |
| Data Structures | |
| class | [GPIO](https://github.com/verifoneone/verifone-git-book-adk/tree/ADK5.1_staging/classvfigpio_1_1_g_p_i_o.md) |
| | |
| ---------- | ----------------------------------------------------------------------------- |
| Namespaces | |
| | [vfigpio](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfigpio.md) |
| | |
| ------- | --------------------------------------------- |
| Macros | |
| #define | [DllSpec](#ad7c2e1cb200073ed64c64285a5f37231) |
| | |
| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| Enumerations | |
| enum | GPIO\_Error {
GPIOE\_OK =0x00, GPIOE\_NOT\_CONNECTED =0x01, GPIOE\_IO\_ERROR =0x02, GPIOE\_PROTOCOL =0x03,
GPIOE\_INVALID\_TLV =0x04, GPIOE\_RESET =0x05, GPIOE\_ERROR =0x10, GPIOE\_MESSAGE\_TOO\_LARGE =0x11,
GPIOE\_INVALID\_COMMAND =0x12, GPIOE\_INVALID\_PARAM =0x13, GPIOE\_CANCELLED =0x14, GPIOE\_NO\_RESOURCE =0x15,
GPIOE\_BUSY =0x1A, GPIOE\_INVALID\_SEQUENCE =0x1C, GPIOE\_TIMEOUT =0x1D, GPIOE\_NOT\_FOUND =0x1F,
GPIOE\_EVENT\_GPIO\_1 =0x8005, GPIOE\_EVENT\_GPIO\_2 =0x8006, GPIOE\_EVENT\_GPIO\_3 =0x8007, GPIOE\_EVENT\_GPIO\_4 =0x8008
}
|
| enum | [GPIO\_Config](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfigpio.md#a75176d13bc1b8120b223fd035ee5c15c) { [GPIO\_OUTPUT](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfigpio.md#a75176d13bc1b8120b223fd035ee5c15caa248e73c1faee9c6f072fd91569cf516) =1, [GPIO\_DEBOUNCE](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfigpio.md#a75176d13bc1b8120b223fd035ee5c15ca3bc241a9e609c6dadfdeddbf5a44032f) =2 } |
| enum | [GPIO\_EventMask](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfigpio.md#a4ad55a6c1ca89921b14a6664d2066655) { [GPIO\_EVENT\_GPIO\_1](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfigpio.md#a4ad55a6c1ca89921b14a6664d2066655a68b18a10e6e4695ab8a4e3f47a8f462a) =0x0010, [GPIO\_EVENT\_GPIO\_2](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfigpio.md#a4ad55a6c1ca89921b14a6664d2066655a6707be73d446886cf4a94ef43b2e3da5) =0x0020, [GPIO\_EVENT\_GPIO\_3](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfigpio.md#a4ad55a6c1ca89921b14a6664d2066655ae235eac53db9ed6ddbba00189082564c) =0x0040, [GPIO\_EVENT\_GPIO\_4](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfigpio.md#a4ad55a6c1ca89921b14a6664d2066655aed79c2c55774b45a78723ea6fb6b9d69) =0x0080 } |
### MacroDefinition Documentation
### DllSpec
\#define DllSpec
---
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