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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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<HTML
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><TITLE
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>Interrupt management functions</TITLE
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TITLE="µITRON API"
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TITLE="Extended Synchronization and Communication Functions"
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TITLE="   Memory pool Management Functions"
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><TR
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>eCos Reference Manual</TH
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><TR
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><TD
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ALIGN="left"
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><A
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HREF="compat-uitron-extended-sync-comm-functions.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 32. &micro;ITRON API</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="compat-uitron-memory-pool-mgmt-functions.html"
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>Next</A
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="COMPAT-UITRON-INTERRUPT-MANAGEMENT-FUNCTIONS">Interrupt management functions</H1
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><P
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>These functions are fully supported in this release:</P
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><TABLE
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BGCOLOR="#E0E0F0"
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WIDTH="70%"
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>void   <TT
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CLASS="FUNCTION"
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> ret_int</TT
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>( void )</PRE
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></TD
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></TR
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></TABLE
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><TABLE
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>ER <TT
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CLASS="FUNCTION"
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>loc_cpu</TT
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>( void )</PRE
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></TD
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></TR
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></TABLE
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><TABLE
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BGCOLOR="#E0E0F0"
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>ER <TT
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CLASS="FUNCTION"
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>unl_cpu</TT
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>( void )</PRE
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></TD
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></TR
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></TABLE
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><TABLE
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BGCOLOR="#E0E0F0"
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WIDTH="70%"
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>ER <TT
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CLASS="FUNCTION"
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>dis_int</TT
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>(
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    UINT <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>eintno</I
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></SPAN
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> )</PRE
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></TD
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></TR
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></TABLE
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><TABLE
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WIDTH="70%"
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>ER <TT
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CLASS="FUNCTION"
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>ena_int</TT
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>(
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    UINT <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>eintno</I
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></SPAN
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> )</PRE
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></TD
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></TR
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></TABLE
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><TABLE
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>void   <TT
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CLASS="FUNCTION"
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>ret_wup</TT
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>(
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    ID <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>tskid</I
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></SPAN
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> )</PRE
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></TD
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></TR
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></TABLE
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><TABLE
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BGCOLOR="#E0E0F0"
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WIDTH="70%"
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>ER <TT
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CLASS="FUNCTION"
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>iwup_tsk</TT
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>(
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    ID <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>tskid</I
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></SPAN
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> )</PRE
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></TD
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></TR
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></TABLE
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><TABLE
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BGCOLOR="#E0E0F0"
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WIDTH="70%"
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>ER <TT
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CLASS="FUNCTION"
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>isig_sem</TT
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>(
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    ID <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>semid</I
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></SPAN
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> )</PRE
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></TD
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><TABLE
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>ER <TT
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CLASS="FUNCTION"
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>iset_flg</TT
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>(
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    ID <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>flgid ,</I
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></SPAN
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>
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    UID<SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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> setptn</I
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></SPAN
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> )</PRE
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></TD
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></TR
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></TABLE
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><TABLE
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WIDTH="70%"
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>ER <TT
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CLASS="FUNCTION"
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>isend_msg</TT
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>(
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    ID <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>mbxid ,</I
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></SPAN
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>
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    T_MSG<SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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> *pk_msg</I
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></SPAN
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> )</PRE
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></TD
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></TR
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></TABLE
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><P
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>Note that <TT
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CLASS="FUNCTION"
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>ret_int()</TT
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> and
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the <TT
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CLASS="FUNCTION"
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>ret_wup()</TT
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> are  implemented
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as macros, containing a &#8220;return&#8221; statement.</P
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><P
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>Also note that <TT
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CLASS="FUNCTION"
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>ret_wup()</TT
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> and
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the <TT
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CLASS="FUNCTION"
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>ixxx_yyy()</TT
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> style functions
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will only work when called from an ISR whose associated DSR is <TT
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CLASS="FUNCTION"
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>cyg_uitron_dsr()</TT
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>,
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as specified in include file <TT
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CLASS="FILENAME"
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>&lt;cyg/compat/uitron/uit_ifnc.h&gt;</TT
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>,
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which defines the <TT
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CLASS="FUNCTION"
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>ixxx_yyy()</TT
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> style
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functions also.</P
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><P
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>If you are writing interrupt handlers more in the
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<SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>eCos</I
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></SPAN
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> style, with separate ISR and DSR routines both of
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your own devising, do not use these special functions from a DSR: use plain
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<TT
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CLASS="FUNCTION"
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>xxx_yyy()</TT
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> style functions (with no &#8216;i&#8217; prefix)
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instead, and do not call any &micro;ITRON functions from the ISR at
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all.</P
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><P
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>The following functions are not supported in this release: </P
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><TABLE
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WIDTH="70%"
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>ER <TT
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CLASS="FUNCTION"
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>def_int</TT
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>(
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    UINT <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>dintno,</I
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></SPAN
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>
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  T_DINT *<SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>pk_dint</I
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></SPAN
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> )</PRE
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></TD
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></TR
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></TABLE
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><TABLE
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BORDER="5"
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BGCOLOR="#E0E0F0"
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WIDTH="70%"
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>ER <TT
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CLASS="FUNCTION"
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>chg_iXX</TT
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>(
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    UINT <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>iXXXX</I
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></SPAN
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> )
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  </PRE
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></TD
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></TR
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></TABLE
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><TABLE
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BGCOLOR="#E0E0F0"
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WIDTH="70%"
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>ER <TT
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CLASS="FUNCTION"
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>ref_iXX</TT
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>(
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    UINT * <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>p_iXXXX</I
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></SPAN
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> )</PRE
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></TD
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></TR
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></TABLE
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><P
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>These unsupported functions are all Level C (CPU dependent).
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Equivalent functionality is available via other <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>eCos</I
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></SPAN
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>-specific
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APIs. </P
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN13831">Error checking</H2
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><P
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>The following conditions are only checked for, and only return
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errors if
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<TT
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CLASS="LITERAL"
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>CYGSEM_UITRON_BAD_PARAMS_RETURN_ERRORS</TT
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>
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is enabled:</P
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><P
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></P
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><UL
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><LI
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><P
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><TT
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CLASS="FUNCTION"
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>loc/unl_cpu()</TT
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>
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: these must only be called in a
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&micro;ITRON task context, else E_CTX.</P
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></LI
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><LI
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><P
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><TT
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CLASS="FUNCTION"
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>dis/ena_int()</TT
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>
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: the interrupt number must be in range as specified by the platform
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HAL in qustion, else E_PAR.</P
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></LI
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></UL
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></DIV
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></DIV
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HREF="compat-uitron-extended-sync-comm-functions.html"
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>Prev</A
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HREF="ecos-ref.html"
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>Home</A
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>Extended Synchronization and Communication Functions</TD
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HREF="compat-uitron-microitron-api.html"
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>Up</A
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>Memory pool Management Functions</TD
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