/**
*
* 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 alarm for VCCINT
* - Set up the configuration registers for single channel continuous mode
* for VCCINT channel
* - Setup interrupt system
* - Enable interrupts
* - Wait until the VCCINT 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_<SYSMON_ADC_instance>_DEVICE_ID value
* from xparameters.h.
* @param SysMonIntrId is
* XPAR_<INTC_instance>_<SYSMON_ADC_instance>_VEC_ID
* value from xparameters.h
*
* @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 SysMonSingleChannelIntrExample(XIntc* IntcInstancePtr,
XSysMon* SysMonInstPtr,
u16 SysMonDeviceId,
u16 SysMonIntrId)
{
int Status;
XSysMon_Config *ConfigPtr;
u16 VccintData;
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;
}
/*
* 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);
/*
* Set the sequencer in Single channel mode.
*/
XSysMon_SetSequencerMode(SysMonInstPtr, XSM_SEQ_MODE_SINGCHAN);
/*
* Set the configuration registers for single channel continuous mode
* of operation for the VCCINT channel.
*/
Status= XSysMon_SetSingleChParams(SysMonInstPtr, XSM_CH_VCCINT,
FALSE, FALSE, FALSE);
if(Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Disable all the alarms in the Configuration Register 1.
*/
XSysMon_SetAlarmEnables(SysMonInstPtr, 0x0);
/*
* Set up Alarm threshold registers for the VCCINT
* High limit and lower limit so that the alarm does not occur.
*/
XSysMon_SetAlarmThreshold(SysMonInstPtr, XSM_ATR_VCCINT_UPPER, 0xFFFF);
XSysMon_SetAlarmThreshold(SysMonInstPtr, XSM_ATR_VCCINT_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 EOC interrupt and Alarm 1 interrupt for on-chip VCCINT.
*/
XSysMon_IntrEnable(SysMonInstPtr, XSM_IPIXR_EOC_MASK |
XSM_IPIXR_VCCINT_MASK);
/*
* Enable global interrupt of System Monitor.
*/
XSysMon_IntrGlobalEnable(SysMonInstPtr);
/*
* Wait till the End of Conversion occurs.
*/
EocFlag = FALSE; /* Clear the EOC Flag */
while (EocFlag != TRUE);
/*
* Read the ADC converted Data from the data registers for VCCINT.
*/
VccintData = XSysMon_GetAdcData(SysMonInstPtr, XSM_CH_VCCINT);
/*
* Set up Alarm threshold registers for the VCCINT
* High limit and lower limit so that the alarm occurs.
*/
XSysMon_SetAlarmThreshold(SysMonInstPtr, XSM_ATR_VCCINT_UPPER,
VccintData - 0x007F);
XSysMon_SetAlarmThreshold(SysMonInstPtr, XSM_ATR_VCCINT_LOWER,
VccintData - 0x007F);
VccintIntr = FALSE; /* Clear the flag */
/*
* Enable Alarm 1 for VCCINT
*/
XSysMon_SetAlarmEnables(SysMonInstPtr, XSM_CFR1_ALM_VCCINT_MASK);
/*
* Wait until an Alarm 1 interrupt occurs.
*/
while (1) {
if (VccintIntr == TRUE) {
/*
* Alarm 1 - VCCINT alarm interrupt has occurred.
* The required processing should be put here.
*/
break;
}
}
/*
* Disable global interrupt of System Monitor.
*/
XSysMon_IntrGlobalDisable(SysMonInstPtr);
return XST_SUCCESS;
}
/***************************************************************************
* Looks up the current config and initializes XADC_WIZ
*
* @ Channel: Chooses channel for single channel mode. Options are Channel 6, Channel 7,
* Channel 14 and Channel 15.
*
* @ SequencerMode: Choose between SINGLE_CHANNEL_MODE (= XSM_SEQ_MODE_SINGCHAN) for single channel mode
* or CONTINUOUS_SAMPLING_MODE(= XSM_SEQ_MODE_CONTINPASS) for continuous sequencing mode.
*
* Always in Differential mode
* Always in continuous mode
* Always slow AcQCycles ( for sequence mode of operations adjust XSysMon_SetSeqAcqTime(&SysMon , SEQ_CHANNELS) to
* XSysMon_SetSeqAcqTime(&SysMon , ~SEQ_CHANNELS) )
*
***************************************************************************/
void init_XADC_WIZ(char channel, u8 SequencerMode)
{
int Status;
int ParameterStatus;
int SequenceStatus;
int InputStatus;
int AcqStatus;
int IncreaseAcqCycles = FALSE;
int IsEventMode = FALSE;
int IsDifferentialMode = TRUE;
u8 Divisor = 0;
XSysMon_Config *Config;
Config = XSysMon_LookupConfig(XPAR_XADC_WIZ_0_DEVICE_ID);
if (NULL == Config) {
//return XST_FAILURE;
}
Status = XSysMon_CfgInitialize(&SysMon,Config ,Config->BaseAddress);
if (Status != XST_SUCCESS) {
xil_printf("XADC_WIZ initialization FAILED!\n \r");
//return XST_FAILURE;
}
else {
xil_printf("XADC_WIZ initialization SUCCESS!\n \r");
}
/* NO averaging*/
XSysMon_SetAvg(&SysMon, XSM_AVG_0_SAMPLES);
/* Calibrate ADC gain and offset + Power Supply gain and offset*/
XSysMon_SetCalibEnables(&SysMon, XSM_CFR1_CAL_ADC_GAIN_OFFSET_MASK | XSM_CFR1_CAL_PS_GAIN_OFFSET_MASK);
/* Sets the channel seqence mode:
* - Default safe mode (XSM_SEQ_MODE_SAFE)
* - One pass through sequence (XSM_SEQ_MODE_ONEPASS)
* - Continuous channel sequencing (XSM_SEQ_MODE_CONTINPASS)
* - Single Channel/Sequencer off (XSM_SEQ_MODE_SINGCHAN)
* - Simulataneous sampling mode (XSM_SEQ_MODE_SIMUL)
* - Independent mode (XSM_SEQ_MODE_INDEPENDENT)
*
* NOTE: We will only use single channel mode and continious channel sequencing mode!!!
*/
if(SequencerMode = XSM_SEQ_MODE_SINGCHAN)
{
XSysMon_SetSequencerMode(&SysMon,XSM_SEQ_MODE_SINGCHAN);
/* Sets the parameters for the single channel mode
* int ParameterStatus; => Return value, =1 when failed
* int IncreaseAcqCycles = FALSE; => TRUE: increased to 10 ADCCLK cycles | FALSE: default 4 ADCCLK cycles
* int IsEventMode = FALSE; => TRUE: event driven sampling mode | FALSE: continious sampling mode
* int IsDifferentialMode = TRUE; => TRUE: differential mode | FALSE: unipolar mode
*/
ParameterStatus = XSysMon_SetSingleChParams(&SysMon,(XSM_CH_AUX_MIN + (channel -1)),
IncreaseAcqCycles, IsEventMode, IsDifferentialMode);
if (ParameterStatus != XST_SUCCESS) {
xil_printf("Setting SingleChannelParameters FAILED!\n \r");
}
}
else if(SequencerMode = XSM_SEQ_MODE_CONTINPASS)
{
XSysMon_SetSequencerMode(&SysMon,XSM_SEQ_MODE_SAFE); /* Settings need to be applied in safe mode*/
XSysMon_SetSequencerEvent(&SysMon, IsEventMode); /* IsEventmode = FALSE => continious sampling!*/
XSysMon_SetAdcClkDivisor(&SysMon, Divisor); /* Divisor sets the clockdevision for the ADC sampling*/
SequenceStatus= XSysMon_SetSeqChEnables(&SysMon,SEQ_CHANNELS); /* Selects channels to sequence*/
if (SequenceStatus != XST_SUCCESS) {
xil_printf("Enabling Sequence Channels FAILED!\n \r");
}
InputStatus = XSysMon_SetSeqInputMode(&SysMon, SEQ_CHANNELS); /* Sets the channels to differential mode */
if (InputStatus != XST_SUCCESS) {
xil_printf("Setting Input Mode FAILED!\n \r");
}
AcqStatus = XSysMon_SetSeqAcqTime(&SysMon , SEQ_CHANNELS); /* If function is enabled: Acquisition cycles will be extended to 10 ADCCLK cycles*/
if (AcqStatus != XST_SUCCESS) {
xil_printf("Setting AcqTime FAILED!\n \r");
}
XSysMon_SetSequencerMode(&SysMon,XSM_SEQ_MODE_CONTINPASS); /* Continuous sampling mode enabled */
}
}