Embedded Application Programming Interface - picmg
Embedded Application Programming Interface - picmg
Embedded Application Programming Interface - picmg
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9.5 EApiGPIOGetLevel<br />
9.5.1 Description<br />
Read the from GPIO ports.<br />
9.5.2 Parameters<br />
Id<br />
uint32_t<br />
EAPI_CALLTYPE<br />
EApiGPIOGetLevel(<br />
__IN uint32_t Id , /* GPIO Id */<br />
__IN uint32_t Bitmask , /* Bit mask of Affected<br />
* Bits<br />
*/<br />
__OUT uint32_t *pLevel /* Current Level */<br />
);<br />
FUNC_DEF 24: EApiGPIOGetLevel<br />
__IN See '9.1.1 GPIO Ids' on page 47<br />
Bitmask<br />
__IN Bit mask. Only selected bits are returned. Unselected bits return EAPI_GPIO_LOW.<br />
Value<br />
EAPI_GPIO_BITMASK_NOSELECT<br />
EAPI_GPIO_BITMASK_SELECT<br />
Description<br />
Do not use the selected GPIO port for this operation.<br />
Use the selected GPIO port for this operation.<br />
See examples 'Single port addressing' and 'Bank addressing' on page 47.<br />
pLevel<br />
__OUT Pointer to a buffer that receives the GPIO level. Results can be read on a bit level.<br />
Value<br />
EAPI_GPIO_LOW<br />
EAPI_GPIO_HIGH<br />
Description<br />
Selected GPIO port is low.<br />
Selected GPIO port is high.<br />
9.5.3 Return Status Codes<br />
Condition<br />
Return Value<br />
Library Uninitialized<br />
EAPI_STATUS_NOT_INITIALIZED<br />
Bitmask==0<br />
EAPI_STATUS_INVALID_PARAMETER<br />
Unsupported ID<br />
EAPI_STATUS_UNSUPPORTED<br />
(Bitmask&~(pInputs|pOutputs))<br />
EAPI_STATUS_INVALID_BITMASK<br />
... see 2.3 Status Codes on page 16<br />
Success<br />
EAPI_STATUS_SUCCESS<br />
PICMG® EAPI R1.0, August 8, 2010 page 52 of 83
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