| /****************************************************************************** |
| * |
| * Copyright (C) 2002 - 2015 Xilinx, Inc. All rights reserved. |
| * |
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| * The above copyright notice and this permission notice shall be included in |
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| * Use of the Software is limited solely to applications: |
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| * |
| ******************************************************************************/ |
| /****************************************************************************/ |
| /** |
| * |
| * @file xuartlite_selftest.c |
| * @addtogroup uartlite_v3_1 |
| * @{ |
| * |
| * This file contains the self-test functions for the UART Lite component |
| * (XUartLite). |
| * |
| * <pre> |
| * MODIFICATION HISTORY: |
| * |
| * Ver Who Date Changes |
| * ----- ---- -------- ----------------------------------------------- |
| * 1.00a ecm 08/31/01 First release |
| * 1.00b jhl 02/21/02 Repartitioned the driver for smaller files |
| * 2.00a ktn 10/20/09 Updated to use HAL Processor APIs. The macros have been |
| * renamed to remove _m from the name. |
| * 3.0 adk 17/12/13 Fixed CR:741186,761863 Reset the FIFO's before reading |
| * the status register We don't know the status of the Status |
| * Register in case of if there is more than one uartlite IP |
| * instance in the h/w design. |
| * </pre> |
| * |
| *****************************************************************************/ |
| |
| /***************************** Include Files ********************************/ |
| |
| #include "xil_types.h" |
| #include "xil_assert.h" |
| #include "xstatus.h" |
| #include "xuartlite.h" |
| #include "xuartlite_i.h" |
| #include "xil_io.h" |
| |
| /************************** Constant Definitions ****************************/ |
| |
| |
| /**************************** Type Definitions ******************************/ |
| |
| |
| /***************** Macros (Inline Functions) Definitions ********************/ |
| |
| |
| /************************** Variable Definitions ****************************/ |
| |
| |
| /************************** Function Prototypes *****************************/ |
| |
| |
| /****************************************************************************/ |
| /** |
| * |
| * Runs a self-test on the device hardware. Since there is no way to perform a |
| * loopback in the hardware, this test can only check the state of the status |
| * register to verify it is correct. This test assumes that the hardware |
| * device is still in its reset state, but has been initialized with the |
| * Initialize function. |
| * |
| * @param InstancePtr is a pointer to the XUartLite instance. |
| * |
| * @return |
| * - XST_SUCCESS if the self-test was successful. |
| * - XST_FAILURE if the self-test failed, the status register |
| * value was not correct |
| * |
| * @note None. |
| * |
| ******************************************************************************/ |
| int XUartLite_SelfTest(XUartLite *InstancePtr) |
| { |
| u32 StatusRegister; |
| |
| /* |
| * Assert validates the input arguments |
| */ |
| Xil_AssertNonvoid(InstancePtr != NULL); |
| Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY); |
| |
| /* |
| * Reset the FIFO's before reading the status register. |
| * It is likely that the Uartlite IP may not always have an |
| * empty Tx and Rx FIFO when a selftest is performed if more than one |
| * uartlite instance is present in the h/w design. |
| */ |
| XUartLite_ResetFifos(InstancePtr); |
| |
| /* |
| * Read the Status register value to check if it is the correct value |
| * after a reset |
| */ |
| StatusRegister = XUartLite_ReadReg(InstancePtr->RegBaseAddress, |
| XUL_STATUS_REG_OFFSET); |
| |
| /* |
| * If the status register is any other value other than |
| * XUL_SR_TX_FIFO_EMPTY then the test is a failure since this is |
| * the not the value after reset |
| */ |
| if (StatusRegister != XUL_SR_TX_FIFO_EMPTY) { |
| return XST_FAILURE; |
| } |
| |
| return XST_SUCCESS; |
| } |
| |
| |
| /** @} */ |