Psion Teklogix OMNii HDK XT10, Руководство пользователя

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Chapter 4: Software
Omnii HDK API Functions
Psion Teklogix Omnii HDK User Manual 43
Returns
• ERROR_SUCCESS – if successful.
• ERROR_INVALID_HANDLE – the specified handle is invalid.
• ERROR_INVALID_PARAMETER – the specified pin is not valid, or the direction pointer
is null.
• ERROR_INVALID_DATA - an exception was generated.
• Other errors are possible.
Sample Code
4.7.4.10 Hdk7545_ExpansionSetPinMode
Syntax
DWORD Hdk7545_ExpansionSetPinMode( HANDLE hdk, DWORD pin, DWORD mode );
Parameters
• hdk – [in] an open HDK handle.
• pin – [in] the ID of the expansion connector pin. The pin parameter must be set to one of the
HDK7545_GPIO_PIN_EXPANSION_xxx values.
• mode – [in] the new pin mode(s) to set (see description below).
Description
Changes the mode of the specified pin on the expansion connector. The mode can be set to either
'Hdk7545_PinMode_NoInterrupt' or to a combination of one or more of the following values:
Hdk7545_PinMode_InterruptLowHigh [edge-triggered interrupts]
Hdk7545_PinMode_InterruptHighLow [edge-triggered interrupts]
Hdk7545_PinMode_InterruptLow [level-triggered interrupts]
Hdk7545_PinMode_InterruptHigh [level-triggered interrupts]
DWORD GetDirection()
{
Hdk7545_Connector expansionSlot = Hdk7545_Connector_Expansion1;
HANDLE hdkHandle = INVALID_HANDLE_VALUE;
DWORD result = Hdk7545_Open(&hdkHandle, expansionSlot);
if( result != ERROR_SUCCESS ) {
return ERROR_NOT_SUPPORTED;
}
Hdk7545_PinDirection direction = Hdk7545_PinDirection_Output;
Hdk7545_ExpansionGetPinDirection(hdkHandle,
HDK7545_GPIO_PIN_EXPANSION_GPIO0_TXD, &direction);
RETAILMSG(1, (L"The pin direction for %u is %u\r\n",
HDK7545_GPIO_PIN_EXPANSION_GPIO0_TXD, direction));
Hdk7545_Close(&hdkHandle);
return ERROR_SUCCESS;
}