Cypress Semiconductor NoBL CY7C1472V33 Guia do Utilizador descarregar pdf (Página 51)

ZestSC1 User Guide

CONFIDENTIAL Page 51 of 57

ZestSC1WriteData

ZESTSC1_STATUS ZestSC1WriteData( ZESTSC1_HANDLE Handle,

void *Buffer,

unsigned long Length);

Parameters

Handle Handle of open ZestSC1 card. See ZestSC1OpenCard.

Buffer Buffer of data to write.

Length Number of bytes to transfer. Must be a multiple of 512.

Return Value

ZESTSC1_SUCCESS Function succeeded

ZESTSC1_ILLEGAL_HANDLE Attempt to use illegal card handle

ZESTSC1_NULL_PARAMETER NULL was used illegally as one of the

parameter values

ZESTSC1_INTERNAL_ERROR An unspecified internal error occurred while

communicating with the driver

ZESTSC1_TIMEOUT Operation timed out

Description

ZestSC1WriteData transfers data from the Host to the ZestSC1 card streaming

interface. Data transfers over the streaming interface must be a multiple of 512 bytes in

length.

For example:

ZESTSC1_HANDLE Handle;

char Buffer[1024];

/* Open a card with ID of 1 */

ZestSC1OpenCard(1, &Handle);

/* Transfer 1k from host to board */

ZestSC1WriteData(Handle, Buffer, 1024);

/* Close the card */

ZestSC1CloseCard(Handle);

Attempting to transfer data to/from the FPGA without a

suitable slave interface configured may result in the ZestSC1

‘hanging’.

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Cypress Semiconductor NoBL CY7C1472V33 Guia do Utilizador Página 51