X<DUT>_Initialize - 2024.1 English

Vitis High-Level Synthesis User Guide (UG1399)

Document ID
UG1399
Release Date
2024-07-03
Version
2024.1 English

Syntax

int X<DUT>_Initialize(X<DUT> *InstancePtr, uintptr BaseAddress);
int X<DUT>_Initialize(X<DUT> *InstancePtr, u16 DeviceId);
int X<DUT>_Initialize(X<DUT> *InstancePtr, const char* InstanceName);

Description

int X<DUT>_Initialize(X<DUT> *InstancePtr, uintptr BaseAddress): For use on standalone systems, initialize the specified BaseAddress of a device. This API will write a proper value to InstancePtr which then can be used in other APIs.

Note: The DeviceId is no longer populated into the driver config struct. Instead the BaseAddress is used to identify the driver instance. The DeviceId will also not be populated in the xparameters.h file. Software applications using these drivers developed in the classic Vitis or Vitis HLS tools will need to be updated to reflect this change using #ifdef SDT as shown in the following example:
#ifndef SDT
#define GPIO_EXAMPLE_DEVICE_ID  XPAR_GPIO_0_DEVICE_ID
#else
#define	XGPIO_AXI_BASEADDRESS	XPAR_XGPIO_0_BASEADDR
#endif

int X<DUT>_Initialize(X<DUT> *InstancePtr, u16 DeviceId): For use on standalone systems, initialize a device. This API will write a proper value to InstancePtr which then can be used in other APIs. AMD recommends calling this API to initialize a device except when an MMU is used in the system, in which case refer to function X<DUT>_CfgInitialize.

int X<DUT>_Initialize(X<DUT> *InstancePtr, const char* InstanceName): For use on Linux systems, initialize a specifically named uio device. Create up to five memory mappings and assign the slave base addresses by mmap, utilizing the uio device information in sysfs.

Where the various arguments are defined as:

InstancePtr
A pointer to the device instance.
DeviceId
Device ID as defined in xparameters.h.
BaseAddress
The BaseAddress as defined in xparameters.h.
InstanceName
The name of the uio device.

Return

XST_SUCCESS indicates success, otherwise fail.