195 lines
6.6 KiB
C
Executable file
195 lines
6.6 KiB
C
Executable file
/******************************************************************************
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*
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* (c) Copyright 2002-2013 Xilinx, Inc. All rights reserved.
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*
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* This file contains confidential and proprietary information of Xilinx, Inc.
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* and is protected under U.S. and international copyright and other
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* intellectual property laws.
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*
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* DISCLAIMER
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* This disclaimer is not a license and does not grant any rights to the
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* materials distributed herewith. Except as otherwise provided in a valid
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* license issued to you by Xilinx, and to the maximum extent permitted by
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* applicable law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND WITH ALL
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* FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS, EXPRESS,
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* IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
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* MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE;
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* and (2) Xilinx shall not be liable (whether in contract or tort, including
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* negligence, or under any other theory of liability) for any loss or damage
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* of any kind or nature related to, arising under or in connection with these
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* materials, including for any direct, or any indirect, special, incidental,
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* or consequential loss or damage (including loss of data, profits, goodwill,
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* or any type of loss or damage suffered as a result of any action brought by
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* a third party) even if such damage or loss was reasonably foreseeable or
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* Xilinx had been advised of the possibility of the same.
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*
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* CRITICAL APPLICATIONS
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* Xilinx products are not designed or intended to be fail-safe, or for use in
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* any application requiring fail-safe performance, such as life-support or
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* safety devices or systems, Class III medical devices, nuclear facilities,
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* applications related to the deployment of airbags, or any other applications
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* that could lead to death, personal injury, or severe property or
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* environmental damage (individually and collectively, "Critical
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* Applications"). Customer assumes the sole risk and liability of any use of
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* Xilinx products in Critical Applications, subject only to applicable laws
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* and regulations governing limitations on product liability.
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*
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* THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS PART OF THIS FILE
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* AT ALL TIMES.
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*
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******************************************************************************/
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/*****************************************************************************/
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/**
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*
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* @file xuartlite_low_level_example.c
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*
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* This file contains a design example using the low-level driver functions
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* and macros of the UartLite driver (XUartLite).
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*
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* @note
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*
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* The user must provide a physical loopback such that data which is
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* transmitted will be received.
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*
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* MODIFICATION HISTORY:
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* <pre>
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* Ver Who Date Changes
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* ----- ---- -------- ---------------------------------------------------------
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* 1.00b rpm 04/25/02 First release
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* 1.00b sv 06/13/05 Minor changes to comply to Doxygen and coding guidelines
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* 2.00a ktn 10/20/09 Updated to use HAL processor APIs and minor changes
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* for coding guidelines.
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* </pre>
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******************************************************************************/
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/***************************** Include Files *********************************/
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#include "xparameters.h"
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#include "xstatus.h"
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#include "xuartlite_l.h"
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/************************** Constant Definitions *****************************/
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/*
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* The following constants map to the XPAR parameters created in the
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* xparameters.h file. They are defined here such that a user can easily
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* change all the needed parameters in one place.
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*/
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#define UARTLITE_BASEADDR XPAR_UARTLITE_0_BASEADDR
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/*
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* The following constant controls the length of the buffers to be sent
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* and received with the UartLite, this constant must be 16 bytes or less so the
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* entire buffer will fit into the transmit and receive FIFOs of the UartLite.
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*/
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#define TEST_BUFFER_SIZE 16
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/**************************** Type Definitions *******************************/
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/***************** Macros (Inline Functions) Definitions *********************/
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/************************** Function Prototypes ******************************/
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int UartLiteLowLevelExample(u32 UartliteBaseAddress);
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/************************** Variable Definitions *****************************/
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/*
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* The following buffers are used in this example to send and receive data
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* with the UartLite.
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*/
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u8 SendBuffer[TEST_BUFFER_SIZE]; /* Buffer for Transmitting Data */
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u8 RecvBuffer[TEST_BUFFER_SIZE]; /* Buffer for Receiving Data */
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/*****************************************************************************/
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/**
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*
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* Main function to call the example.
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*
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* @param None.
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*
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* @return XST_SUCCESS if successful, XST_FAILURE if unsuccessful.
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*
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* @note None.
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*
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******************************************************************************/
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int main(void)
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{
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int Status;
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/*
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* Run the UartLite Low level example, specify the BaseAddress that is
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* generated in xparameters.h.
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*/
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Status = UartLiteLowLevelExample(UARTLITE_BASEADDR);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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return XST_SUCCESS;
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}
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/*****************************************************************************/
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/**
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*
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* This function does a minimal test on the UartLite device using the low-level
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* driver macros and functions. This function sends data and expects to receive
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* the data through the UartLite. A physical loopback must be done by the user
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* with the transmit and receive signals of the UartLite.
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*
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* @param UartliteBaseAddress is the base address of the UartLite device
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* and is the XPAR_<UARTLITE_instance>_BASEADDR value from
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* xparameters.h.
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*
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* @return XST_SUCCESS if successful, XST_FAILURE if unsuccessful.
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*
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* @note None.
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*
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******************************************************************************/
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int UartLiteLowLevelExample(u32 UartliteBaseAddress)
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{
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int Index;
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/*
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* Initialize the send buffer bytes with a pattern to send and the
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* the receive buffer bytes to zero.
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*/
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for (Index = 0; Index < TEST_BUFFER_SIZE; Index++) {
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SendBuffer[Index] = Index + 'B';
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RecvBuffer[Index] = 0;
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}
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/*
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* Send the entire transmit buffer.
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*/
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for (Index = 0; Index < TEST_BUFFER_SIZE; Index++) {
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XUartLite_SendByte(UartliteBaseAddress, SendBuffer[Index]);
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}
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/*
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* Receive the entire buffer's worth. Note that the RecvByte function
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* blocks waiting for a character.
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*/
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for (Index = 0; Index < TEST_BUFFER_SIZE; Index++) {
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RecvBuffer[Index] = XUartLite_RecvByte(UartliteBaseAddress);
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}
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/*
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* Check the receive buffer data against the send buffer and verify the
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* data was correctly received.
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*/
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for (Index = 0; Index < TEST_BUFFER_SIZE; Index++) {
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if (SendBuffer[Index] != RecvBuffer[Index]) {
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return XST_FAILURE;
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}
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}
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return XST_SUCCESS;
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}
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