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32 /*****************************************************************************/
35 * @file xadcps_selftest.c
36 * @addtogroup xadcps_v2_0
39 * This file contains a diagnostic self test function for the XAdcPs driver.
40 * The self test function does a simple read/write test of the Alarm Threshold
43 * See xadcps.h for more information.
49 * MODIFICATION HISTORY:
51 * Ver Who Date Changes
52 * ----- ----- -------- -----------------------------------------------------
53 * 1.00a ssb 12/22/11 First release based on the XPS/AXI xadc driver
57 *****************************************************************************/
59 /***************************** Include Files ********************************/
63 /************************** Constant Definitions ****************************/
66 * The following constant defines the test value to be written
67 * to the Alarm Threshold Register
69 #define XADCPS_ATR_TEST_VALUE 0x55
71 /**************************** Type Definitions ******************************/
73 /***************** Macros (Inline Functions) Definitions ********************/
75 /************************** Variable Definitions ****************************/
77 /************************** Function Prototypes *****************************/
79 /*****************************************************************************/
82 * Run a self-test on the driver/device. The test
83 * - Resets the device,
84 * - Writes a value into the Alarm Threshold register and reads it back
86 * - Resets the device again.
89 * @param InstancePtr is a pointer to the XAdcPs instance.
92 * - XST_SUCCESS if the value read from the Alarm Threshold
93 * register is the same as the value written.
94 * - XST_FAILURE Otherwise
96 * @note This is a destructive test in that resets of the device are
97 * performed. Refer to the device specification for the
98 * device status after the reset operation.
100 ******************************************************************************/
101 int XAdcPs_SelfTest(XAdcPs *InstancePtr)
107 * Assert the argument
109 Xil_AssertNonvoid(InstancePtr != NULL);
110 Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
114 * Reset the device to get it back to its default state
116 XAdcPs_Reset(InstancePtr);
119 * Write a value into the Alarm Threshold registers, read it back, and
122 XAdcPs_SetAlarmThreshold(InstancePtr, XADCPS_ATR_VCCINT_UPPER,
123 XADCPS_ATR_TEST_VALUE);
124 RegValue = XAdcPs_GetAlarmThreshold(InstancePtr, XADCPS_ATR_VCCINT_UPPER);
126 if (RegValue == XADCPS_ATR_TEST_VALUE) {
127 Status = XST_SUCCESS;
129 Status = XST_FAILURE;
133 * Reset the device again to its default state.
135 XAdcPs_Reset(InstancePtr);
137 * Return the test result.