--- /dev/null
+/******************************************************************************
+*
+* Copyright (C) 2010 - 2015 Xilinx, Inc. All rights reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* Use of the Software is limited solely to applications:
+* (a) running on a Xilinx device, or
+* (b) that interact with a Xilinx device through a bus or interconnect.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+* XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+* SOFTWARE.
+*
+* Except as contained in this notice, the name of the Xilinx shall not be used
+* in advertising or otherwise to promote the sale, use or other dealings in
+* this Software without prior written authorization from Xilinx.
+*
+******************************************************************************/
+/****************************************************************************/
+/**
+*
+* @file xuartps_selftest.c
+* @addtogroup uartps_v3_1
+* @{
+*
+* This file contains the self-test functions for the XUartPs driver.
+*
+* <pre>
+* MODIFICATION HISTORY:
+*
+* Ver Who Date Changes
+* ----- ------ -------- -----------------------------------------------
+* 1.00 drg/jz 01/13/10 First Release
+* 3.00 kvn 02/13/15 Modified code for MISRA-C:2012 compliance.
+* </pre>
+*
+******************************************************************************/
+
+/***************************** Include Files *********************************/
+
+#include "xstatus.h"
+#include "xuartps.h"
+
+/************************** Constant Definitions *****************************/
+
+
+/**************************** Type Definitions *******************************/
+
+
+/***************** Macros (Inline Functions) Definitions *********************/
+
+#define XUARTPS_TOTAL_BYTES (u8)32
+
+/************************** Variable Definitions *****************************/
+
+static u8 TestString[XUARTPS_TOTAL_BYTES]="abcdefghABCDEFGH012345677654321";
+static u8 ReturnString[XUARTPS_TOTAL_BYTES];
+
+/************************** Function Prototypes ******************************/
+
+
+/****************************************************************************/
+/**
+*
+* This function runs a self-test on the driver and hardware device. This self
+* test performs a local loopback and verifies data can be sent and received.
+*
+* The time for this test is proportional to the baud rate that has been set
+* prior to calling this function.
+*
+* The mode and control registers are restored before return.
+*
+* @param InstancePtr is a pointer to the XUartPs instance
+*
+* @return
+* - XST_SUCCESS if the test was successful
+* - XST_UART_TEST_FAIL if the test failed looping back the data
+*
+* @note
+*
+* This function can hang if the hardware is not functioning properly.
+*
+******************************************************************************/
+s32 XUartPs_SelfTest(XUartPs *InstancePtr)
+{
+ s32 Status = XST_SUCCESS;
+ u32 IntrRegister;
+ u32 ModeRegister;
+ u8 Index;
+ u32 ReceiveDataResult;
+
+ /* Assert validates the input arguments */
+ Xil_AssertNonvoid(InstancePtr != NULL);
+ Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
+
+ /* Disable all interrupts in the interrupt disable register */
+ IntrRegister = XUartPs_ReadReg(InstancePtr->Config.BaseAddress,
+ XUARTPS_IMR_OFFSET);
+ XUartPs_WriteReg(InstancePtr->Config.BaseAddress, XUARTPS_IDR_OFFSET,
+ XUARTPS_IXR_MASK);
+
+ /* Setup for local loopback */
+ ModeRegister = XUartPs_ReadReg(InstancePtr->Config.BaseAddress,
+ XUARTPS_MR_OFFSET);
+ XUartPs_WriteReg(InstancePtr->Config.BaseAddress, XUARTPS_MR_OFFSET,
+ ((ModeRegister & (u32)(~XUARTPS_MR_CHMODE_MASK)) |
+ (u32)XUARTPS_MR_CHMODE_L_LOOP));
+
+ /* Send a number of bytes and receive them, one at a time. */
+ for (Index = 0U; Index < XUARTPS_TOTAL_BYTES; Index++) {
+ /*
+ * Send out the byte and if it was not sent then the failure
+ * will be caught in the comparison at the end
+ */
+ (void)XUartPs_Send(InstancePtr, &TestString[Index], 1U);
+
+ /*
+ * Wait until the byte is received. This can hang if the HW
+ * is broken. Watch for the FIFO empty flag to be false.
+ */
+ ReceiveDataResult = Xil_In32((InstancePtr->Config.BaseAddress) + XUARTPS_SR_OFFSET) &
+ XUARTPS_SR_RXEMPTY;
+ while (ReceiveDataResult == XUARTPS_SR_RXEMPTY ) {
+ ReceiveDataResult = Xil_In32((InstancePtr->Config.BaseAddress) + XUARTPS_SR_OFFSET) &
+ XUARTPS_SR_RXEMPTY;
+ }
+
+ /* Receive the byte */
+ (void)XUartPs_Recv(InstancePtr, &ReturnString[Index], 1U);
+ }
+
+ /*
+ * Compare the bytes received to the bytes sent to verify the exact data
+ * was received
+ */
+ for (Index = 0U; Index < XUARTPS_TOTAL_BYTES; Index++) {
+ if (TestString[Index] != ReturnString[Index]) {
+ Status = XST_UART_TEST_FAIL;
+ }
+ }
+
+ /*
+ * Restore the registers which were altered to put into polling and
+ * loopback modes so that this test is not destructive
+ */
+ XUartPs_WriteReg(InstancePtr->Config.BaseAddress, XUARTPS_IER_OFFSET,
+ IntrRegister);
+ XUartPs_WriteReg(InstancePtr->Config.BaseAddress, XUARTPS_MR_OFFSET,
+ ModeRegister);
+
+ return Status;
+}
+/** @} */
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