Ryan Malloy
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80 lines
2.2 KiB
Markdown
80 lines
2.2 KiB
Markdown
# DiSEqC for the GenPix Skywalker-1 BDA Driver (Extended)
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**Implementation Guidelines for Applications**
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*Author: Devendra | Created: 2009-07-09 | Source: Microsoft Office Word 2007*
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---
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## I. GUID for the SkyWalker1 Extended property
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```c
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//Used to extend the feature of the BDA
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//{0B5221EB-F4C4-4976-B959-EF74427464D9}
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#define STATIC_KSPROPSETID_BdaExtendedProperty \
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0x0B5221EB, 0xF4C4, 0x4976, 0xB9, 0x59, 0xEF, 0x74, 0x42, 0x74, 0x64, 0xD9
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DEFINE_GUIDSTRUCT("0B5221EB-F4C4-4976-B959-EF74427464D9", KSPROPSETID_BdaExtendedProperty);
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#define KSPROPSETID_BdaExtendedProperty DEFINE_GUIDNAMED(KSPROPSETID_BdaExtendedProperty)
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```
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## II. Extended Property List (Only DiSEqC support is extended)
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```c
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//Extended Property List
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typedef enum __KSPROPERTY_EXTENDED
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{
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/* DiSEqC Command */
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//Used to send the Digital Satellite Equipment Control (DiSEqC)
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//Commands by application
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KSPROPERTY_BDA_DISEQC = 0, //Extension Property 1
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} KSPROPERTY_EXTENDED;
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```
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## III. Enumeration for the Simple Tone Burst
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```c
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typedef enum enSimpleToneBurst
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{
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SEC_MINI_A,
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SEC_MINI_B
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} SIMPLE_TONE_BURST;
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```
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## IV. DiSEqC Command Structure
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```c
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typedef struct __DISEQC_COMMAND
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{
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UCHAR ucMessage[MAX_DISEQC_COMMAND_LENGTH];
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/* Byte - 0 : Framing,
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Byte - 1 : Address,
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Byte - 2 : Command,
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Byte - 3 : Data[0],
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Byte - 4 : Data[1],
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Byte - 5 : Data[2] */
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UCHAR ucMessageLength;
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/* The Valid values for DiSEqC Command are 3...6
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If this value is 1 then Byte 0 is taken as Simple "Tone Burst"
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Control Command */
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} DISEQC_COMMAND, *PDISEQC_COMMAND;
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```
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## V. Operation
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### i. To send the Simple Burst command
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1. Create the `DISEQC_COMMAND` Structure
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2. Set `ucMessage[0]` to either `SEC_MINI_A` or `SEC_MINI_B`
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3. Set `ucMessageLength` as `1`
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### ii. To send DiSEqC commands
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1. Create the `DISEQC_COMMAND` Structure
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2. Set the Framing value to `ucMessage[0]` (e.g. `0xE0`)
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3. Set the Device Address to `ucMessage[1]` (e.g. `0x01`)
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4. Send the Command for the Device to `ucMessage[2]`
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5. If required, set the Data bytes `ucMessage[3]`, `ucMessage[4]`, `ucMessage[5]`
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6. Set `ucMessageLength` accordingly. Valid values are 3 to 6.
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