EC_API_SLV_CBObjRead_t

typedef uint8_t(* EC_API_SLV_CBObjRead_t) (void *pContext_p, uint16_t index_p, uint8_t subindex_p, uint32_t length_p, uint16_t *pData_p, uint8_t completeAccess_p)

Callback trigered by a SDO Upload operation.

The function is called when the EtherCAT Master sends a object read request. If no callback function is registered then the value contained in the object is returned. If a callback function is registered it is the reponsability of the callback function to update the value pointed to by pData. pData is returned within the SDO Response datagram.

Parameters

[in]	pContext_p	function context
[in]	index_p	Index of the requested object.
[in]	subindex_p	SubIndex of the requested object.
[in]	length_p	Length of the received data buffer.
[in]	pData_p	Pointer to the data buffer.
[in]	completeAccess_p	Read all subIndexes of the object.

Returns

result of the upload operation. Set 0 if operation succeeded or an abort code declared on the Beckhoff Slave Stack (ABORTIDX_ in sdoserv.h).