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32 /*****************************************************************************/
35 * @file xspips_selftest.c
37 * This component contains the implementation of selftest functions for an SPI
41 * MODIFICATION HISTORY:
43 * Ver Who Date Changes
44 * ----- ------ -------- ----------------------------------------------
45 * 1.00 drg/jz 01/25/10 First release
46 * 1.04a sg 01/30/13 SetDelays test includes DelayTestNss parameter.
47 * 3.00 kvn 02/13/15 Modified code for MISRA-C:2012 compliance.
51 ******************************************************************************/
53 /***************************** Include Files *********************************/
57 /************************** Constant Definitions *****************************/
60 /**************************** Type Definitions *******************************/
63 /***************** Macros (Inline Functions) Definitions *********************/
66 /************************** Function Prototypes ******************************/
69 /************************** Variable Definitions *****************************/
72 /*****************************************************************************/
75 * Runs a self-test on the driver/device. The self-test is destructive in that
76 * a reset of the device is performed in order to check the reset values of
77 * the registers and to get the device into a known state.
79 * Upon successful return from the self-test, the device is reset.
81 * @param InstancePtr is a pointer to the XSpiPs instance.
84 * - XST_SUCCESS if successful
85 * - XST_REGISTER_ERROR indicates a register did not read or write
90 ******************************************************************************/
91 s32 XSpiPs_SelfTest(XSpiPs *InstancePtr)
100 Xil_AssertNonvoid(InstancePtr != NULL);
101 Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
104 * Reset the SPI device to leave it in a known good state
106 XSpiPs_Reset(InstancePtr);
109 * All the SPI registers should be in their default state right now.
111 Register = XSpiPs_ReadReg(InstancePtr->Config.BaseAddress,
113 if (Register != XSPIPS_CR_RESET_STATE) {
114 return (s32)XST_REGISTER_ERROR;
117 Register = XSpiPs_ReadReg(InstancePtr->Config.BaseAddress,
119 if (Register != XSPIPS_ISR_RESET_STATE) {
120 return (s32)XST_REGISTER_ERROR;
123 DelayTestNss = 0x5AU;
124 DelayTestBtwn = 0xA5U;
125 DelayTestAfter = 0xAAU;
126 DelayTestInit = 0x55U;
129 * Write and read the delay register, just to be sure there is some
130 * hardware out there.
132 Status = XSpiPs_SetDelays(InstancePtr, DelayTestNss, DelayTestBtwn,
133 DelayTestAfter, DelayTestInit);
134 if (Status != (s32)XST_SUCCESS) {
138 XSpiPs_GetDelays(InstancePtr, &DelayTestNss, &DelayTestBtwn,
139 &DelayTestAfter, &DelayTestInit);
140 if ((0x5AU != DelayTestNss) || (0xA5U != DelayTestBtwn) ||
141 (0xAAU != DelayTestAfter) || (0x55U != DelayTestInit)) {
142 return (s32)XST_REGISTER_ERROR;
145 Status = XSpiPs_SetDelays(InstancePtr, 0U, 0U, 0U, 0U);
146 if (Status != (s32)XST_SUCCESS) {
151 * Reset the SPI device to leave it in a known good state
153 XSpiPs_Reset(InstancePtr);
155 return (s32)XST_SUCCESS;