Admin at 10:37, 4 February 2014

2014-02-04T10:37:44Z

Admin: Created page with "= Action = Configures the interrupt system and priority for Xmega
2013-02-08T09:48:09Z

Created page with "= Action = Configures the interrupt system and priority for Xmega Action =

Configures the interrupt system and priority for Xmega

 

 

= Syntax =

CONFIG PRIORITY= prio, VECTOR= vector, HI= hi, LO= lo, MED= med

 

 

= Remarks =
<div style="padding: 0px; margin: 0px 0px 0px 4px;">
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prio

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STATIC or ROUNDROBIN. In the AVR the lowest interrupt address has the highest priority. When you chose STATIC the interrupts behave as in non-Xmega chips. To prevent that a low priority interrupt never get executed you can select ROUNDROBIN

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vector

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APPLICATION or BOOT. Application is the default. This will place the interrupt vectors at address 0, the starting address.

When you chose BOOT, the interrupt vectors are placed at the beginning of the boot section. This makes it possible to use interrupts in a boot application.

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hi

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ENABLED or DISABLED. Chose ENABLED to enable the HI priority interrupts.

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lo

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ENABLED or DISABLED. Chose ENABLED to enable the LO priority interrupts.

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med

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ENABLED or DISABLED. Chose ENABLED to enable the MED priority interrupts.

|}
</div>
 

In the XMEGA, you must enable HI, LO or MED interrupts before you can use them.

When you enable an interrupt you also must specify the priority.

For example : Enable Usartc0_rxc , Lo

This would enable the USARTC0_RX interrupt and would assign it a low priority.

 

In this case, at least the LO priority should be enabled :

Config Priority = Static , Vector = Application , Lo = Enabled

 

When you use LO and MED interrupts, you need to enable the both.

 

 

= See also =

[[ENABLE]] , [[DISABLE]] , [[ON]]

 

 

= Example =

 <source lang="bascomavr">
Config Priority = Static , Vector = Application , Lo = Enabled

On Usartc0_rxc Rxc_isr
Enable Usartc0_rxc , Lo
Enable Interrupts
</source> {{Languages}}

[[Category:BASCOM Language Reference]]

@@ Line 79: / Line 79: @@
 <span style="font-family: Arial;">&nbsp;</span>
-<span style="font-family: Arial;">&nbsp;</span>
+[[File:Notice.jpg]]When you do not specify the priority when enabling an interrupt like&nbsp;:&nbsp;<span style="font-weight: bold;">ENABLE Tcc0_ovf&nbsp;</span>, the compiler will use the MED interrupt level. This means that you must enable this as well when using CONFIG PRIORITY. When you do NOT use CONFIG PRIORITY, but only ENABLE INTERRUPTS, the compiler will activate the MED interrupt automatically.
 = <span class="f_Header">See also</span> =