> 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/namespaces/namespacevfigpio.md).
# vfigpio
[Data Structures](#nested-classes) | [Enumerations](#enum-members)
| | |
| --------------- | ------------------------------------------------------------------------------------------------------------ |
| Data Structures | |
| class | [GPIO](https://github.com/verifoneone/verifone-git-book-adk/tree/ADK5.1_staging/classvfigpio_1_1_g_p_i_o.md) |
| | |
| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 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](#a75176d13bc1b8120b223fd035ee5c15c) { [GPIO\_OUTPUT](#a75176d13bc1b8120b223fd035ee5c15caa248e73c1faee9c6f072fd91569cf516) =1, [GPIO\_DEBOUNCE](#a75176d13bc1b8120b223fd035ee5c15ca3bc241a9e609c6dadfdeddbf5a44032f) =2 } |
| enum | [GPIO\_EventMask](#a4ad55a6c1ca89921b14a6664d2066655) { [GPIO\_EVENT\_GPIO\_1](#a4ad55a6c1ca89921b14a6664d2066655a68b18a10e6e4695ab8a4e3f47a8f462a) =0x0010, [GPIO\_EVENT\_GPIO\_2](#a4ad55a6c1ca89921b14a6664d2066655a6707be73d446886cf4a94ef43b2e3da5) =0x0020, [GPIO\_EVENT\_GPIO\_3](#a4ad55a6c1ca89921b14a6664d2066655ae235eac53db9ed6ddbba00189082564c) =0x0040, [GPIO\_EVENT\_GPIO\_4](#a4ad55a6c1ca89921b14a6664d2066655aed79c2c55774b45a78723ea6fb6b9d69) =0x0080 } |
### EnumerationType Documentation
### GPIO\_Config
enum \[GPIO\_Config]\(#a75176d13bc1b8120b223fd035ee5c15c)
[GPIO](https://github.com/verifoneone/verifone-git-book-adk/tree/ADK5.1_staging/classvfigpio_1_1_g_p_i_o.md) configuration flags
| | |
| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------- |
| Enumerator | |
| GPIO\_OUTPUT | Switch [GPIO](https://github.com/verifoneone/verifone-git-book-adk/tree/ADK5.1_staging/classvfigpio_1_1_g_p_i_o.md) to output mode, default is input |
| GPIO\_DEBOUNCE | Activate debouncing in input mode |
### GPIO\_Error
enum \[GPIO\_Error]\(#a82298b40693099f7037dfb35e43421fc)
[GPIO](https://github.com/verifoneone/verifone-git-book-adk/tree/ADK5.1_staging/classvfigpio_1_1_g_p_i_o.md) error codes
| | |
| -------------------------- | --------------------------------------------------------------- |
| Enumerator | |
| GPIOE\_OK | no error |
| GPIOE\_NOT\_CONNECTED | not connected |
| GPIOE\_IO\_ERROR | I/O error |
| GPIOE\_PROTOCOL | invalid message received |
| GPIOE\_INVALID\_TLV | invalid TLV data format received |
| GPIOE\_RESET | the command was cancelled due to resetting the secure processor |
| GPIOE\_ERROR | Generic error |
| GPIOE\_MESSAGE\_TOO\_LARGE | Message was too large |
| GPIOE\_INVALID\_COMMAND | Invalid command was sent |
| GPIOE\_INVALID\_PARAM | Invalid parameters |
| GPIOE\_CANCELLED | command has been cancelled by break |
| GPIOE\_NO\_RESOURCE | no resource |
| GPIOE\_BUSY | operation cannot be performed now, retry later |
| GPIOE\_INVALID\_SEQUENCE | The command is not allowed in the current state |
| GPIOE\_TIMEOUT | timeout |
| GPIOE\_NOT\_FOUND | the item/resource/etc was not found |
| GPIOE\_EVENT\_GPIO\_1 | gpio change event |
| GPIOE\_EVENT\_GPIO\_2 | gpio change event |
| GPIOE\_EVENT\_GPIO\_3 | gpio change event |
| GPIOE\_EVENT\_GPIO\_4 | gpio change event |
### GPIO\_EventMask
enum \[GPIO\_EventMask]\(#a4ad55a6c1ca89921b14a6664d2066655)
event mask
| | |
| -------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Enumerator | |
| GPIO\_EVENT\_GPIO\_1 | gpio change event: SPE\_EVENT\_GPIO\_1, value contains the current [GPIO](https://github.com/verifoneone/verifone-git-book-adk/tree/ADK5.1_staging/classvfigpio_1_1_g_p_i_o.md) value |
| GPIO\_EVENT\_GPIO\_2 | gpio change event: SPE\_EVENT\_GPIO\_2, value contains the current [GPIO](https://github.com/verifoneone/verifone-git-book-adk/tree/ADK5.1_staging/classvfigpio_1_1_g_p_i_o.md) value |
| GPIO\_EVENT\_GPIO\_3 | gpio change event: SPE\_EVENT\_GPIO\_3, value contains the current [GPIO](https://github.com/verifoneone/verifone-git-book-adk/tree/ADK5.1_staging/classvfigpio_1_1_g_p_i_o.md) value |
| GPIO\_EVENT\_GPIO\_4 | gpio change event: SPE\_EVENT\_GPIO\_4, value contains the current [GPIO](https://github.com/verifoneone/verifone-git-book-adk/tree/ADK5.1_staging/classvfigpio_1_1_g_p_i_o.md) value |
---
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