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/****************************************************************************/
/**
*
* @file xsysmon_intr_example.c
*
* This file contains a design example using the driver functions
* of the System Monitor/ADC driver. This example here shows the usage of the
* driver/device in interrupt mode to handle on-chip temperature and voltage
* alarm interrupts.
*
*
* @note
*
* This code assumes that no Operating System is being used.
*
* The values of the on-chip temperature and the on-chip Vccaux voltage are read
* from the device and then the alarm thresholds are set in such a manner that
* the alarms occur.
*
*
*
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- ----- -------- -----------------------------------------------------
* 1.00a xd/sv 05/22/07 First release
* 2.00a sv 06/22/08 Modified the function description of the interrupt
* handler
* 2.00a sdm 09/26/08 Added code to return temperature value to the main
* function. TestappPeripheral prints the temperature
* 4.00a ktn 10/22/09 Updated the example to use HAL processor APIs/macros.
* Updated the example to use macros that have been
* renamed to remove _m from the name of the macro.
* 5.03a bss 04/25/13 Modified SysMonIntrExample function to set
* Sequencer Mode as Safe mode instead of Single
* channel mode before configuring Sequencer registers.
* CR #703729
*
*
*****************************************************************************/
/***************************** Include Files ********************************/
#include "xsysmon.h"
#include "xparameters.h"
#include "xstatus.h"
#include "xintc.h"
#include "xil_exception.h"
/************************** Constant Definitions ****************************/
/*
* The following constants map to the XPAR parameters created in the
* xparameters.h file. They are defined here such that a user can easily
* change all the needed parameters in one place.
*/
#ifndef TESTAPP_GEN
#define SYSMON_DEVICE_ID XPAR_SYSMON_0_DEVICE_ID
#define INTC_DEVICE_ID XPAR_INTC_0_DEVICE_ID
#define INTR_ID XPAR_INTC_0_SYSMON_0_VEC_ID
#endif
/**************************** Type Definitions ******************************/
/***************** Macros (Inline Functions) Definitions ********************/
/************************** Function Prototypes *****************************/
int SysMonIntrExample(XIntc* IntcInstancePtr,
XSysMon* SysMonInstPtr,
u16 SysMonDeviceId,
u16 SysMonIntrId,
int *Temp);
static void SysMonInterruptHandler(void *CallBackRef);
static int SysMonSetupInterruptSystem(XIntc* IntcInstancePtr,
XSysMon *SysMonPtr,
u16 IntrId );
/************************** Variable Definitions ****************************/
#ifndef TESTAPP_GEN
static XSysMon SysMonInst; /* System Monitor driver instance */
static XIntc InterruptController; /* Instance of the XIntc driver. */
#endif
/*
* Shared variables used to test the callbacks.
*/
volatile static int TemperatureIntr = FALSE; /* Temperature alarm intr */
volatile static int VccauxIntr = FALSE; /* VCCAUX alarm interrupt */
#ifndef TESTAPP_GEN
/****************************************************************************/
/**
*
* Main function that invokes the Interrupt example.
*
* @param None.
*
* @return
* - XST_SUCCESS if the example has completed successfully.
* - XST_FAILURE if the example has failed.
*
* @note None.
*
*****************************************************************************/
int main(void)
{
int Status;
int Temp;
/*
* Run the SysMonitor interrupt example, specify the parameters that
* are generated in xparameters.h.
*/
Status = SysMonIntrExample(&InterruptController,
&SysMonInst,
SYSMON_DEVICE_ID,
INTR_ID,
&Temp);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
return XST_SUCCESS;
}
#endif /* TESTAPP_GEN */
/****************************************************************************/
/**
*
* This function runs a test on the System Monitor/ADC device using the
* driver APIs.
*
* The function does the following tasks:
* - Initiate the System Monitor/ADC device driver instance
* - Run self-test on the device
* - Reset the device
* - Set up alarms for on-chip temperature and VCCAUX
* - Set up sequence registers to continuously monitor on-chip temperature
* and VCCAUX
* - Setup interrupt system
* - Enable interrupts
* - Set up configuration registers to start the sequence
* - Wait until temperature alarm interrupt or VCCAUX alarm interrupt
* occurs
*
* @param IntcInstancePtr is a pointer to the Interrupt Controller
* driver Instance.
* @param SysMonInstPtr is a pointer to the XSysMon driver Instance.
* @param SysMonDeviceId is the XPAR__DEVICE_ID value
* from xparameters.h.
* @param SysMonIntrId is
* XPAR___VEC_ID value from
* xparameters.h
* @param Temp is an output parameter, it is a pointer through which the
* current temperature value is returned to the main function.
*
* @return
* - XST_SUCCESS if the example has completed successfully.
* - XST_FAILURE if the example has failed.
*
* @note This function may never return if no interrupt occurs.
*
****************************************************************************/
int SysMonIntrExample(XIntc* IntcInstancePtr, XSysMon* SysMonInstPtr,
u16 SysMonDeviceId, u16 SysMonIntrId, int *Temp)
{
int Status;
XSysMon_Config *ConfigPtr;
u16 TempData;
u16 VccauxData;
u32 IntrStatus;
/*
* Initialize the SysMon driver.
*/
ConfigPtr = XSysMon_LookupConfig(SysMonDeviceId);
if (ConfigPtr == NULL) {
return XST_FAILURE;
}
XSysMon_CfgInitialize(SysMonInstPtr, ConfigPtr, ConfigPtr->BaseAddress);
/*
* Self Test the System Monitor/ADC device.
*/
Status = XSysMon_SelfTest(SysMonInstPtr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Disable the Channel Sequencer before configuring the Sequence
* registers.
*/
XSysMon_SetSequencerMode(SysMonInstPtr, XSM_SEQ_MODE_SAFE);
/*
* Setup the Averaging to be done for the channels in the
* Configuration 0 register as 16 samples:
*/
XSysMon_SetAvg(SysMonInstPtr, XSM_AVG_16_SAMPLES);
/*
* Setup the Sequence register for 1st Auxiliary channel
* Setting is:
* - Add acquisition time by 6 ADCCLK cycles.
* - Bipolar Mode
*
* Setup the Sequence register for 16th Auxiliary channel
* Setting is:
* - Add acquisition time by 6 ADCCLK cycles.
* - Unipolar Mode
*/
Status = XSysMon_SetSeqInputMode(SysMonInstPtr, XSM_SEQ_CH_AUX00);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
Status = XSysMon_SetSeqAcqTime(SysMonInstPtr, XSM_SEQ_CH_AUX15 |
XSM_SEQ_CH_AUX00);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Enable the averaging on the following channels in the Sequencer
* registers:
* - On-chip Temperature
* - On-chip VCCAUX supply sensor
* - 1st Auxiliary Channel
* - 16th Auxiliary Channel
*/
Status = XSysMon_SetSeqAvgEnables(SysMonInstPtr, XSM_SEQ_CH_TEMP |
XSM_SEQ_CH_VCCAUX |
XSM_SEQ_CH_AUX00 |
XSM_SEQ_CH_AUX15);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Enable the following channels in the Sequencer registers:
* - On-chip Temperature
* - On-chip VCCAUX supply sensor
* - 1st Auxiliary Channel
* - 16th Auxiliary Channel
*/
Status = XSysMon_SetSeqChEnables(SysMonInstPtr, XSM_SEQ_CH_TEMP |
XSM_SEQ_CH_VCCAUX |
XSM_SEQ_CH_AUX00 |
XSM_SEQ_CH_AUX15);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Set the ADCCLK frequency equal to 1/32 of System clock for the System
* Monitor/ADC in the Configuration Register 2.
*/
XSysMon_SetAdcClkDivisor(SysMonInstPtr, 32);
/*
* Enable the Channel Sequencer in continuous sequencer cycling mode.
*/
XSysMon_SetSequencerMode(SysMonInstPtr, XSM_SEQ_MODE_CONTINPASS);
/*
* Wait till the End of Sequence occurs
*/
XSysMon_GetStatus(SysMonInstPtr); /* Clear the old status */
while ((XSysMon_GetStatus(SysMonInstPtr) & XSM_SR_EOS_MASK) !=
XSM_SR_EOS_MASK);
/*
* Read the ADC converted Data from the data registers for on-chip
* temperature and on-chip VCCAUX voltage.
*/
TempData = XSysMon_GetAdcData(SysMonInstPtr, XSM_CH_TEMP);
VccauxData = XSysMon_GetAdcData(SysMonInstPtr, XSM_CH_VCCAUX);
/*
* Convert the ADC data into temperature
*/
*Temp = XSysMon_RawToTemperature(TempData);
/*
* Disable all the alarms in the Configuration Register 1.
*/
XSysMon_SetAlarmEnables(SysMonInstPtr, 0x0);
/*
* Set up Alarm threshold registers for the on-chip temperature and
* VCCAUX High limit and lower limit so that the alarms DONOT occur.
*/
XSysMon_SetAlarmThreshold(SysMonInstPtr, XSM_ATR_TEMP_UPPER, 0xFFFF);
XSysMon_SetAlarmThreshold(SysMonInstPtr, XSM_ATR_TEMP_LOWER, 0xFFFF);
XSysMon_SetAlarmThreshold(SysMonInstPtr, XSM_ATR_VCCAUX_UPPER, 0xFFFF);
XSysMon_SetAlarmThreshold(SysMonInstPtr, XSM_ATR_VCCAUX_LOWER, 0x0);
/*
* Setup the interrupt system.
*/
Status = SysMonSetupInterruptSystem(IntcInstancePtr,
SysMonInstPtr,
SysMonIntrId);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Clear any bits set in the Interrupt Status Register.
*/
IntrStatus = XSysMon_IntrGetStatus(SysMonInstPtr);
XSysMon_IntrClear(SysMonInstPtr, IntrStatus);
/*
* Enable Alarm 0 interrupt for on-chip temperature and Alarm 2
* interrupt for on-chip VCCAUX.
*/
XSysMon_IntrEnable(SysMonInstPtr,
XSM_IPIXR_TEMP_MASK |
XSM_IPIXR_VCCAUX_MASK);
/*
* Enable global interrupt of System Monitor.
*/
XSysMon_IntrGlobalEnable(SysMonInstPtr);
/*
* Set up Alarm threshold registers for
* On-chip Temperature High limit
* On-chip Temperature Low limit
* VCCAUX High limit
* VCCAUX Low limit
*/
XSysMon_SetAlarmThreshold(SysMonInstPtr, XSM_ATR_TEMP_UPPER,
TempData - 0x007F);
XSysMon_SetAlarmThreshold(SysMonInstPtr, XSM_ATR_TEMP_LOWER,
TempData - 0x007F);
XSysMon_SetAlarmThreshold(SysMonInstPtr, XSM_ATR_VCCAUX_UPPER,
VccauxData - 0x007F);
XSysMon_SetAlarmThreshold(SysMonInstPtr, XSM_ATR_VCCAUX_LOWER,
VccauxData + 0x007F);
/*
* Enable Alarm 0 for on-chip temperature and Alarm 2 for on-chip
* VCCAUX in the Configuration Register 1.
*/
XSysMon_SetAlarmEnables(SysMonInstPtr, (XSM_CFR1_ALM_VCCAUX_MASK |
XSM_CFR1_ALM_TEMP_MASK));
/*
* Wait until an Alarm 0 or Alarm 2 interrupt occurs.
*/
while (1) {
if (TemperatureIntr == TRUE) {
/*
* Alarm 0 - Temperature alarm interrupt has occurred.
* The required processing should be put here.
*/
break;
}
if (VccauxIntr == TRUE) {
/*
* Alarm 2 - VCCAUX alarm interrupt has occurred.
* The required processing should be put here.
*/
break;
}
}
/*
* Disable global interrupt of System Monitor.
*/
XSysMon_IntrGlobalDisable(SysMonInstPtr);
return XST_SUCCESS;
}
/*****************************************************************************/
/**
*
* This function is the Interrupt Service Routine for the System Monitor device.
* It will be called by the processor whenever an interrupt is asserted
* by the device.
*
* There are 10 different interrupts supported
* - Over Temperature
* - ALARM 0
* - ALARM 1
* - ALARM 2
* - End of Sequence
* - End of Conversion
* - JTAG Locked
* - JATG Modified
* - Over Temperature DeActive
* - ALARM 0 DeActive
*
* This function only handles ALARM 0 and ALARM 2 interrupts. User of this
* code may need to modify the code to meet needs of the application.
*
* @param CallBackRef is the callback reference passed from the Interrupt
* controller driver, which in our case is a pointer to the
* driver instance.
*
* @return None.
*
* @note This function is called within interrupt context.
*
******************************************************************************/
static void SysMonInterruptHandler(void *CallBackRef)
{
u32 IntrStatusValue;
XSysMon *SysMonPtr = (XSysMon *)CallBackRef;
/*
* Get the interrupt status from the device and check the value.
*/
IntrStatusValue = XSysMon_IntrGetStatus(SysMonPtr);
if (IntrStatusValue & XSM_IPIXR_TEMP_MASK) {
/*
* Set Temperature interrupt flag so the code
* in application context can be aware of this interrupt.
*/
TemperatureIntr = TRUE;
}
if (IntrStatusValue & XSM_IPIXR_VCCAUX_MASK) {
/*
* Set VCCAUX interrupt flag so the code in application context
* can be aware of this interrupt.
*/
VccauxIntr = TRUE;
}
/*
* Clear all bits in Interrupt Status Register.
*/
XSysMon_IntrClear(SysMonPtr, IntrStatusValue);
}
/****************************************************************************/
/**
*
* This function sets up the interrupt system so interrupts can occur for the
* System Monitor/ADC. The function is application-specific since the actual
* system may or may not have an interrupt controller. The System Monitor/ADC
* device could be directly connected to a processor without an interrupt
* controller. The user should modify this function to fit the application.
*
* @param IntcInstancePtr is a pointer to the Interrupt Controller
* driver Instance.
* @param SysMonPtr is a pointer to the driver instance for the System
* Monitor device which is going to be connected to the interrupt
* controller.
* @param IntrId is XPAR___VEC_ID
* value from xparameters.h.
*
* @return XST_SUCCESS if successful, or XST_FAILURE.
*
* @note None.
*
*
****************************************************************************/
static int SysMonSetupInterruptSystem(XIntc* IntcInstancePtr,
XSysMon *SysMonPtr,
u16 IntrId )
{
int Status;
#ifndef TESTAPP_GEN
/*
* Initialize the interrupt controller driver so that it's ready to use.
*/
Status = XIntc_Initialize(IntcInstancePtr, INTC_DEVICE_ID);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
#endif
/*
* Connect the handler that will be called when an interrupt
* for the device occurs, the handler defined above performs the
* specific interrupt processing for the device.
*/
Status = XIntc_Connect(IntcInstancePtr,
IntrId,
(XInterruptHandler) SysMonInterruptHandler,
SysMonPtr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
#ifndef TESTAPP_GEN
/*
* Start the interrupt controller so interrupts are enabled for all
* devices that cause interrupts. Specify real mode so that the System
* Monitor/ACD device can cause interrupts through the interrupt
* controller.
*/
Status = XIntc_Start(IntcInstancePtr, XIN_REAL_MODE);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
#endif
/*
* Enable the interrupt for the System Monitor/ADC device.
*/
XIntc_Enable(IntcInstancePtr, IntrId);
#ifndef TESTAPP_GEN
/*
* Initialize the exception table.
*/
Xil_ExceptionInit();
/*
* Register the interrupt controller handler with the exception table.
*/
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
(Xil_ExceptionHandler) XIntc_InterruptHandler,
IntcInstancePtr);
/*
* Enable exceptions.
*/
Xil_ExceptionEnable();
#endif /* TESTAPP_GEN */
return XST_SUCCESS;
}