Projector Control
Currently there is only one type of body so the size is fixed to 0x0006. The CRC field contains the CRC of the message. The CRC algorithm is given in Appendix 1. To disable CRC set CRC_lo=0x00 and CRC_hi = 0x00.
The Message Head – if the CRC are disabled – then looks like the following string:
0xBE 0xEF 0x80 0x06 0x00 0x00 0x00. This Head will be present in all strings sent to the projector from the host.
4.1.2 Message Body
The message body has the following structure:
Byte 0 | Byte 1 | Byte 2 |
| Byte 3 | Byte 4 |
| Byte 5 |
Operation | Type | Function |
| Value | |||
OpTypeLo | 0x00 | FuncNum_lo |
| 0x00 | Opval_lo |
| Opval_hi |
Table 6
4.1.2.1 Field description
| Field Name | Field Value | Description |
|
Operation Type | OpTypeLo |
|
| 0x01 | Operation Set. Set current value |
| 0x02 | Operation Get. Gets the current value |
| 0x03 | Operation Initialize. Initialize the value to default. |
|
| Should not be used |
| 0x04 | Operation Increment. Increment the value by one |
|
| step. Only valid for “Adjust” functions. |
| 0x05 | Operation Decrement. Decrement the value by one |
|
| step. Only valid for “Adjust” functions. |
| 0x06 | Operation Execute. Execute the operation. Only |
|
| used for “Execute” operations |
Function | FuncNum | The actual function number to execute. A list of |
|
| usable FuncNum is given in Chapter 9 |
Value | - | Only used by Operation Set. The actual value to set |
|
| the operation to. For all other operation actions, this |
|
| field is set to 0x0000. |
Table 7 |
|
|
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