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41 /*****************************************************************************/
44 * @file xadcps_selftest.c
46 * This file contains a diagnostic self test function for the XAdcPs driver.
47 * The self test function does a simple read/write test of the Alarm Threshold
50 * See xadcps.h for more information.
56 * MODIFICATION HISTORY:
58 * Ver Who Date Changes
59 * ----- ----- -------- -----------------------------------------------------
60 * 1.00a ssb 12/22/11 First release based on the XPS/AXI xadc driver
64 *****************************************************************************/
66 /***************************** Include Files ********************************/
70 /************************** Constant Definitions ****************************/
73 * The following constant defines the test value to be written
74 * to the Alarm Threshold Register
76 #define XADCPS_ATR_TEST_VALUE 0x55
78 /**************************** Type Definitions ******************************/
80 /***************** Macros (Inline Functions) Definitions ********************/
82 /************************** Variable Definitions ****************************/
84 /************************** Function Prototypes *****************************/
86 /*****************************************************************************/
89 * Run a self-test on the driver/device. The test
90 * - Resets the device,
91 * - Writes a value into the Alarm Threshold register and reads it back
93 * - Resets the device again.
96 * @param InstancePtr is a pointer to the XAdcPs instance.
99 * - XST_SUCCESS if the value read from the Alarm Threshold
100 * register is the same as the value written.
101 * - XST_FAILURE Otherwise
103 * @note This is a destructive test in that resets of the device are
104 * performed. Refer to the device specification for the
105 * device status after the reset operation.
107 ******************************************************************************/
108 int XAdcPs_SelfTest(XAdcPs *InstancePtr)
114 * Assert the argument
116 Xil_AssertNonvoid(InstancePtr != NULL);
117 Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
121 * Reset the device to get it back to its default state
123 XAdcPs_Reset(InstancePtr);
126 * Write a value into the Alarm Threshold registers, read it back, and
129 XAdcPs_SetAlarmThreshold(InstancePtr, XADCPS_ATR_VCCINT_UPPER,
130 XADCPS_ATR_TEST_VALUE);
131 RegValue = XAdcPs_GetAlarmThreshold(InstancePtr, XADCPS_ATR_VCCINT_UPPER);
133 if (RegValue == XADCPS_ATR_TEST_VALUE) {
134 Status = XST_SUCCESS;
136 Status = XST_FAILURE;
140 * Reset the device again to its default state.
142 XAdcPs_Reset(InstancePtr);
144 * Return the test result.