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example.cpp
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example.cpp
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/*
* Copyright 1986-2022 Xilinx, Inc. All Rights Reserved.
* Copyright 2022-2024 Advanced Micro Devices, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* This file contains an example for creating an AXI4-master interface in Vivado
* HLS
*/
#include <stdio.h>
#include <string.h>
void example(volatile int* a) {
#pragma HLS INTERFACE m_axi port = a depth = 50
int i;
int buff[50];
// memcpy creates a burst access to memory
// multiple calls of memcpy cannot be pipelined and will be scheduled
// sequentially memcpy requires a local buffer to store the results of the
// memory transaction
memcpy(buff, (const int*)a, 50 * sizeof(int));
for (i = 0; i < 50; i++) {
buff[i] = buff[i] + 100;
}
memcpy((int*)a, buff, 50 * sizeof(int));
}