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10 <!DOCTYPE concept |
10 <!DOCTYPE concept |
11 PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
11 PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
12 <concept id="GUID-745273E3-BB3A-59BF-9C33-6C8BB3D850A9" xml:lang="en"><title>GPIO |
12 <concept id="GUID-745273E3-BB3A-59BF-9C33-6C8BB3D850A9" xml:lang="en"><title>GPIO |
13 Design Considerations</title><shortdesc> General design considerations involved in implementing the Symbian |
13 Design Considerations</title><shortdesc> General design considerations involved in implementing the Symbian |
14 platform <apiname>GPIO</apiname> class.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody> |
14 platform <codeph>GPIO</codeph> class.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody> |
15 <section id="GUID-CC35EB0E-6156-50F9-9AFC-7D89F2BE2D8A"><title>Pin IDs</title> <p>To |
15 <section id="GUID-CC35EB0E-6156-50F9-9AFC-7D89F2BE2D8A"><title>Pin IDs</title> <p>To |
16 manipulate a GPIO interface at the level of the pin it is necessary to have |
16 manipulate a GPIO interface at the level of the pin it is necessary to have |
17 a method of specifying individual pins which is both systematic and intuitive. |
17 a method of specifying individual pins which is both systematic and intuitive. |
18 For the purposes of porting we need a systematic way of identifying a pin |
18 For the purposes of porting we need a systematic way of identifying a pin |
19 by its module and bit number: this means specifying the module by its register |
19 by its module and bit number: this means specifying the module by its register |
247 is expected that the implementation of all the API functions will involve |
247 is expected that the implementation of all the API functions will involve |
248 the use of locks. In principle locks are not necessary where a function can |
248 the use of locks. In principle locks are not necessary where a function can |
249 be implemented exclusively by a single read, write or modify call to the hardware |
249 be implemented exclusively by a single read, write or modify call to the hardware |
250 register API. </p> </section> |
250 register API. </p> </section> |
251 </conbody><related-links> |
251 </conbody><related-links> |
252 <link href="GUID-0E15C8C4-E511-569F-8AB4-895CA00331AB.dita"><linktext>GPIO Features</linktext> |
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253 </link> |
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254 <link href="GUID-48AEF60B-D2B6-55B5-96FD-55C1F1868A3F.dita"><linktext>GPIO Implementation |
252 <link href="GUID-48AEF60B-D2B6-55B5-96FD-55C1F1868A3F.dita"><linktext>GPIO Implementation |
255 Guide</linktext></link> |
253 Guide</linktext></link> |
256 </related-links></concept> |
254 </related-links></concept> |