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== (**COPIED FROM ENGLISH PAGE**) === Action =

This statement configures the Xmega event routing.

 

 

= Syntax =

CONFIG EVENT_SYSTEM = dummy, MUXx=MUX, QDx=QD, QDIx=QDI, QDIRMx=QDIRM,DIGFLTx=DIGFLT

The letter X is used to indicate that a value between 0 and 7 can be used. So there is MUX0, MUX1, MUX2,MUX3 etc.

 

 

= Remarks =

The Event System is a set of features for inter peripheral communication. It enables the possibility

for a change of state in one peripheral to automatically trigger actions in other peripherals.

The change of state in a peripheral that will trigger actions in other peripherals is configurable in

software. It is a simple, but powerful system as it allows for autonomous control of peripherals

without any use of interrupt, CPU or DMA resources.

 

There are 8 multiplexers and 8 control registers. Register 0, 2 and 4 can be used for quadrature decoding.

 

 
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MUX

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There are 8 multiplexers, named MUX0-MUX7. The MUX is used to select an event source.There are many sources for events :

NONE : disabled, default

RTC_OVF : Real Timer overflow

RTC_CMP : Real Timer compare match

ACA_CH0 : analog comparator ACA, channel 0

ACA_CH1 : analog comparator ACA, channel 1

ACA_WIN : analog comparator ACA, window

ACB_CH0 : analog comparator ACB, channel 0

ACB_CH1 : analog comparator ACB, channel 1

ACB_WIN : analog comparator ACB, window

ADCA_CH0- ADCA_CH3 : ADCA channel 0-3

ADCB_CH0- ADCB_CH3 : ADCB channel 0-3

PORTA.0 - PORTA.7 : PORT A pin 0-7

PORTB.0 - PORTB.7 : PORT B pin 0-7

PORTC.0 - PORTC.7 : PORT C pin 0-7

PORTD.0 - PORTD.7 : PORT D pin 0-7

PORTE.0 - PORTE.7 : PORT E pin 0-7

PORTF.0 - PORTF.7 : PORT F pin 0-7

PRESCALER1, PRESCALER2, PRESCALER4, PRESCALER8, PRESCALER16, PRESCALER32, PRESCALER64,PRESCALER128,PRESCALER256,PRESCALER512,PRESCALER1024,PRESCALER2048,PRESCALER4096,PRESCALER8192,PRESCALER16384 : The clock divided by 1,2,4,8,16,32,64,128,256 etc.

 

TCC0_OVF  : Timer TC0 overflow

TCC0_ERR : Timer TC0 error

TCC0_CCA : Timer TC0 capture or compare match A

TCC0_CCB : Timer TC0 capture or compare match B

TCC0_CCC : Timer TC0 capture or compare match C

TCC0_CCD : Timer TC0 capture or compare match D

TCC1_OVF  : Timer TC1 overflow

TCC1_ERR : Timer TC1 error

TCC1_CCA : Timer TC1 capture or compare match A

TCC1_CCB : Timer TC1 capture or compare match B

TCC1_CCC : Timer TC1 capture or compare match C

TCC1_CCD : Timer TC1 capture or compare match D

 

Dito for TCD0, TCD1, TCE0, TCE1, TCF0 and TCF1

 

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QD

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Enables or disables the quadrature decoder. Will only work on QD0,QD2 and QD4.

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QDI

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Enables or disables the quadrature decode index. Will only work on QDI0, QDI2 and QDI4.

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QDIRM

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Quadrature decode index recognition mode. This is a numeric constant between 0 and 3. Each value represents the 2 possible bit values for the two input signals. Will only work on QDIRM0, QDIRM2 and QDIRM4.

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DIGFLT

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Defines the length of digital filtering used. Events will be passed through to the event channel only when the event source has been active and sampled with the same level for a number of peripheral clock for the number of cycles as defined by DIGFLT.

The number of samples is in the range from 1-8. The default is 1 sample.

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= See also =

[[ATXMEGA]]

 

 

= Example 1 =

 <source lang="bascomavr">
' Select PortC.0 as INPUT to event channel 0
' Digflt0 = 8 --> Enable Digital Filtering for Event Channel 0. The Event must be active for 8 samples in order to be passed to the Event system
' Event Channel 1 INPUT = Timer/Counter C0 Overflow
' Event Channel 2 INPUT = Analog Input Port A Channel 0
' Event Channel 3 INPUT = Real Timer overflow
Config Event_system = Dummy , _
Mux0 = Portc.0 , Digflt0 = 8 , _
Mux1 = Tcc0_ovf , _
Mux2 = Adca_ch0 , _
Mux3 = Rtc_ovf

</source>

= Example 2 =

 <source lang="bascomavr">
'Event Channel 7 is input for the Timer/Counter TcD1 overflow
Config Event_system = Dummy , Mux7 = Tcd1_ovf
</source>

= Example 3 =

 <source lang="bascomavr">
' Using the Counter/Timer to count events like a falling edge on Pine.5

$regfile = "xm256a3bdef.dat"
$crystal = 32000000 '32MHz
$hwstack = 64
$swstack = 40
$framesize = 40

Config Osc = Disabled , 32mhzosc = Enabled '32MHz

'configure the systemclock
Config Sysclock = 32mhz , Prescalea = 1 , Prescalebc = 1_1

Config Com7 = 57600 , Mode = Asynchroneous , Parity = None , Stopbits = 1 , Databits = 8 'Portf.2 and Portf.3 is COM7
Open "COM7:" For Binary As #1

'Config Interrupts
Config Priority = Static , Vector = Application , Lo = Enabled , Med = Enabled 'Enable Lo Level Interrupts

Dim Timer_overflow As Bit

Print #1 , "---Event Counting with Timer C0 over Event Channel 0 from PINE.5----"

Config Porte.5 = Input
Config Xpin = Porte.5 , Outpull = Pullup , Sense = Falling 'enable Pullup and reaction on falling edge

Config Event_system = Dummy , Mux0 = Porte.5 , Digflt0 = 8 'Eventchannel 0 = PINE.5, enable digital filtering
Config Tcc0 = Normal , Prescale = E0 , Event_source = E0 , Event_action = Capture ' Normal = no waveform generation, Event Source = Event Channel 0

On Tcc0_ovf Timerd0_int
Enable Tcc0_ovf , Lo 'Enable overflow interrupt in LOW Priority
Tcc0_per = 5 'Interrupt when Count > 5
Enable Interrupts

'################MAINLOOP#######################################################
Do

Wait 1
Print #1 , "TCC0_CNT = " ; Tcc0_cnt 'Actual Count

If Timer_overflow = 1 Then
Reset Timer_overflow
Print #1 , "TCC0_OVERVLOW" 'Print it when Overflow Interrupt is fired
End If

Loop
'################MAINLOOP#######################################################

End

Timerd0_int:
Set Timer_overflow
Return
</source> {{Languages}}

[[Category:BASCOM Language Reference/de]]

CONFIG EVENT SYSTEM/de - Revision history

Admin: 1 revision

Admin at 20:27, 7 February 2013