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32 /*****************************************************************************/
35 * @file xiicps_selftest.c
37 * This component contains the implementation of selftest functions for the
38 * XIicPs driver component.
41 * MODIFICATION HISTORY:
43 * Ver Who Date Changes
44 * ----- ------ -------- ---------------------------------------------
45 * 1.00a drg/jz 01/30/10 First release
46 * 1.00a sdm 09/22/11 Removed unused code
47 * 3.0 sk 11/03/14 Removed TimeOut Register value check
48 * 01/31/15 Modified the code according to MISRAC 2012 Compliant.
51 ******************************************************************************/
53 /***************************** Include Files *********************************/
57 /************************** Constant Definitions *****************************/
59 #define REG_TEST_VALUE 0x00000005U
61 /**************************** Type Definitions *******************************/
64 /***************** Macros (Inline Functions) Definitions *********************/
67 /************************** Function Prototypes ******************************/
70 /************************** Variable Definitions *****************************/
73 /*****************************************************************************/
76 * Runs a self-test on the driver/device. The self-test is destructive in that
77 * a reset of the device is performed in order to check the reset values of
78 * the registers and to get the device into a known state.
80 * Upon successful return from the self-test, the device is reset.
82 * @param InstancePtr is a pointer to the XIicPs instance.
85 * - XST_SUCCESS if successful.
86 * - XST_REGISTER_ERROR indicates a register did not read or write
91 ******************************************************************************/
92 s32 XIicPs_SelfTest(XIicPs *InstancePtr)
95 Xil_AssertNonvoid(InstancePtr != NULL);
96 Xil_AssertNonvoid(InstancePtr->IsReady == (u32)XIL_COMPONENT_IS_READY);
99 * All the IIC registers should be in their default state right now.
101 if ((XIICPS_CR_RESET_VALUE !=
102 XIicPs_ReadReg(InstancePtr->Config.BaseAddress,
103 XIICPS_CR_OFFSET)) ||
104 (XIICPS_IXR_ALL_INTR_MASK !=
105 XIicPs_ReadReg(InstancePtr->Config.BaseAddress,
106 XIICPS_IMR_OFFSET))) {
107 return (s32)XST_FAILURE;
110 XIicPs_Reset(InstancePtr);
113 * Write, Read then write a register
115 XIicPs_WriteReg(InstancePtr->Config.BaseAddress,
116 XIICPS_SLV_PAUSE_OFFSET, REG_TEST_VALUE);
118 if (REG_TEST_VALUE != XIicPs_ReadReg(InstancePtr->Config.BaseAddress,
119 XIICPS_SLV_PAUSE_OFFSET)) {
120 return (s32)XST_FAILURE;
123 XIicPs_WriteReg(InstancePtr->Config.BaseAddress,
124 XIICPS_SLV_PAUSE_OFFSET, 0U);
126 XIicPs_Reset(InstancePtr);
128 return (s32)XST_SUCCESS;