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32 /*****************************************************************************/
35 * @file xiicps_selftest.c
36 * @addtogroup iicps_v3_0
39 * This component contains the implementation of selftest functions for the
40 * XIicPs driver component.
43 * MODIFICATION HISTORY:
45 * Ver Who Date Changes
46 * ----- ------ -------- ---------------------------------------------
47 * 1.00a drg/jz 01/30/10 First release
48 * 1.00a sdm 09/22/11 Removed unused code
49 * 3.0 sk 11/03/14 Removed TimeOut Register value check
50 * 01/31/15 Modified the code according to MISRAC 2012 Compliant.
53 ******************************************************************************/
55 /***************************** Include Files *********************************/
59 /************************** Constant Definitions *****************************/
61 #define REG_TEST_VALUE 0x00000005U
63 /**************************** Type Definitions *******************************/
66 /***************** Macros (Inline Functions) Definitions *********************/
69 /************************** Function Prototypes ******************************/
72 /************************** Variable Definitions *****************************/
75 /*****************************************************************************/
78 * Runs a self-test on the driver/device. The self-test is destructive in that
79 * a reset of the device is performed in order to check the reset values of
80 * the registers and to get the device into a known state.
82 * Upon successful return from the self-test, the device is reset.
84 * @param InstancePtr is a pointer to the XIicPs instance.
87 * - XST_SUCCESS if successful.
88 * - XST_REGISTER_ERROR indicates a register did not read or write
93 ******************************************************************************/
94 s32 XIicPs_SelfTest(XIicPs *InstancePtr)
97 Xil_AssertNonvoid(InstancePtr != NULL);
98 Xil_AssertNonvoid(InstancePtr->IsReady == (u32)XIL_COMPONENT_IS_READY);
101 * All the IIC registers should be in their default state right now.
103 if ((XIICPS_CR_RESET_VALUE !=
104 XIicPs_ReadReg(InstancePtr->Config.BaseAddress,
105 XIICPS_CR_OFFSET)) ||
106 (XIICPS_IXR_ALL_INTR_MASK !=
107 XIicPs_ReadReg(InstancePtr->Config.BaseAddress,
108 XIICPS_IMR_OFFSET))) {
109 return (s32)XST_FAILURE;
112 XIicPs_Reset(InstancePtr);
115 * Write, Read then write a register
117 XIicPs_WriteReg(InstancePtr->Config.BaseAddress,
118 XIICPS_SLV_PAUSE_OFFSET, REG_TEST_VALUE);
120 if (REG_TEST_VALUE != XIicPs_ReadReg(InstancePtr->Config.BaseAddress,
121 XIICPS_SLV_PAUSE_OFFSET)) {
122 return (s32)XST_FAILURE;
125 XIicPs_WriteReg(InstancePtr->Config.BaseAddress,
126 XIICPS_SLV_PAUSE_OFFSET, 0U);
128 XIicPs_Reset(InstancePtr);
130 return (s32)XST_SUCCESS;