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32 /*****************************************************************************/
35 * @file xadcps_selftest.c
37 * This file contains a diagnostic self test function for the XAdcPs driver.
38 * The self test function does a simple read/write test of the Alarm Threshold
41 * See xadcps.h for more information.
47 * MODIFICATION HISTORY:
49 * Ver Who Date Changes
50 * ----- ----- -------- -----------------------------------------------------
51 * 1.00a ssb 12/22/11 First release based on the XPS/AXI xadc driver
55 *****************************************************************************/
57 /***************************** Include Files ********************************/
61 /************************** Constant Definitions ****************************/
64 * The following constant defines the test value to be written
65 * to the Alarm Threshold Register
67 #define XADCPS_ATR_TEST_VALUE 0x55
69 /**************************** Type Definitions ******************************/
71 /***************** Macros (Inline Functions) Definitions ********************/
73 /************************** Variable Definitions ****************************/
75 /************************** Function Prototypes *****************************/
77 /*****************************************************************************/
80 * Run a self-test on the driver/device. The test
81 * - Resets the device,
82 * - Writes a value into the Alarm Threshold register and reads it back
84 * - Resets the device again.
87 * @param InstancePtr is a pointer to the XAdcPs instance.
90 * - XST_SUCCESS if the value read from the Alarm Threshold
91 * register is the same as the value written.
92 * - XST_FAILURE Otherwise
94 * @note This is a destructive test in that resets of the device are
95 * performed. Refer to the device specification for the
96 * device status after the reset operation.
98 ******************************************************************************/
99 int XAdcPs_SelfTest(XAdcPs *InstancePtr)
105 * Assert the argument
107 Xil_AssertNonvoid(InstancePtr != NULL);
108 Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
112 * Reset the device to get it back to its default state
114 XAdcPs_Reset(InstancePtr);
117 * Write a value into the Alarm Threshold registers, read it back, and
120 XAdcPs_SetAlarmThreshold(InstancePtr, XADCPS_ATR_VCCINT_UPPER,
121 XADCPS_ATR_TEST_VALUE);
122 RegValue = XAdcPs_GetAlarmThreshold(InstancePtr, XADCPS_ATR_VCCINT_UPPER);
124 if (RegValue == XADCPS_ATR_TEST_VALUE) {
125 Status = XST_SUCCESS;
127 Status = XST_FAILURE;
131 * Reset the device again to its default state.
133 XAdcPs_Reset(InstancePtr);
135 * Return the test result.