| /****************************************************************************** |
| * |
| * Copyright (C) 2010 - 2015 Xilinx, Inc. All rights reserved. |
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| * Use of the Software is limited solely to applications: |
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| ******************************************************************************/ |
| /****************************************************************************/ |
| /** |
| * |
| * @file xscuwdt_selftest.c |
| * @addtogroup scuwdt_v2_1 |
| * @{ |
| * |
| * Contains diagnostic self-test functions for the XScuWdt driver. |
| * |
| * <pre> |
| * MODIFICATION HISTORY: |
| * |
| * Ver Who Date Changes |
| * ----- --- -------- --------------------------------------------- |
| * 1.00a sdm 01/15/10 First release |
| * 2.1 sk 02/26/15 Modified the code for MISRA-C:2012 compliance. |
| * </pre> |
| * |
| ******************************************************************************/ |
| |
| /***************************** Include Files *********************************/ |
| |
| #include "xscuwdt.h" |
| |
| /************************** Constant Definitions *****************************/ |
| |
| /**************************** Type Definitions *******************************/ |
| |
| /***************** Macros (Inline Functions) Definitions *********************/ |
| |
| /************************** Function Prototypes ******************************/ |
| |
| /************************** Variable Definitions *****************************/ |
| |
| /****************************************************************************/ |
| /** |
| * |
| * Run a self-test on the WDT. This test stops the watchdog, writes a value to |
| * the watchdog load register, starts the watchdog and verifies that the value |
| * read from the counter register is less that the value written to the load |
| * register. It then restores the control register and the watchdog load |
| * register. |
| * |
| * @param InstancePtr is a pointer to the XScuWdt instance. |
| * |
| * @return |
| * - XST_SUCCESS if self-test was successful. |
| * - XST_FAILURE if the WDT is not decrementing. |
| * |
| * @note None. |
| * |
| ******************************************************************************/ |
| s32 XScuWdt_SelfTest(XScuWdt *InstancePtr) |
| { |
| s32 SelfTestStatus; |
| u32 Register; |
| u32 CtrlOrig; |
| u32 LoadOrig; |
| |
| /* |
| * Assert to ensure the inputs are valid and the instance has been |
| * initialized. |
| */ |
| Xil_AssertNonvoid(InstancePtr != NULL); |
| Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY); |
| |
| /* |
| * Stop the watchdog timer. |
| */ |
| CtrlOrig = XScuWdt_GetControlReg(InstancePtr); |
| XScuWdt_SetControlReg(InstancePtr, |
| CtrlOrig & (u32)(~XSCUWDT_CONTROL_WD_ENABLE_MASK)); |
| |
| LoadOrig = XScuWdt_ReadReg((InstancePtr)->Config.BaseAddr, |
| XSCUWDT_LOAD_OFFSET); |
| XScuWdt_LoadWdt(InstancePtr, 0xFFFFFFFFU); |
| |
| /* |
| * Start the watchdog timer and check if the watchdog counter is |
| * decrementing. |
| */ |
| XScuWdt_SetControlReg(InstancePtr, |
| CtrlOrig | (u32)XSCUWDT_CONTROL_WD_ENABLE_MASK); |
| |
| Register = XScuWdt_ReadReg((InstancePtr)->Config.BaseAddr, |
| XSCUWDT_COUNTER_OFFSET); |
| |
| XScuWdt_LoadWdt(InstancePtr, LoadOrig); |
| XScuWdt_SetControlReg(InstancePtr, CtrlOrig); |
| |
| if (Register == 0xFFFFFFFFU) { |
| SelfTestStatus = (s32)XST_FAILURE; |
| } |
| else { |
| SelfTestStatus = (s32)XST_SUCCESS; |
| } |
| |
| return SelfTestStatus; |
| } |
| /** @} */ |