Difference between revisions of "DSP:ReadPipeIfPossible"
Jump to navigation
Jump to search
Steveice10 (talk | contribs) (Clean up.) |
|||
| Line 46: | Line 46: | ||
| u16, Actual read size | | u16, Actual read size | ||
|} | |} | ||
| + | |||
| + | = Channels = | ||
| + | |||
| + | == Channel 2 (Audio) == | ||
| + | |||
| + | Channel 2 returns the DSP DRAM addresses of structures located in the [[DSP Memory Region]]. [[DSP:ConvertProcessAddressFromDspDram]] can be used to convert these addresses into virtual memory addresses. The list of addresses and the length of the list vary depending on DSP firmware version. | ||
| + | |||
| + | == Channel 3 (Binary) == | ||
| + | |||
| + | The purpose of channel 3 is unknown. The behaviour of this pipe varies depending on DSP firmware version. Observed behaviours include: | ||
| + | |||
| + | * doing nothing. | ||
| + | * echoing what is returned to it. | ||
| + | * long strings of zeros. | ||
Latest revision as of 23:39, 7 March 2016
Request[edit]
| Index Word | Description |
|---|---|
| 0 | Header code [0x001000c0] |
| 1 | Channel (0 - 7 0:Debug from DSP 1:P-DMA 2:audio 3:binary 4-7: free ?) |
| 2 | Peer (0 = from DSP, 1 = from ARM) |
| 3 | u16, Size |
0x100 byte after the Request header
| Index Word | Description |
|---|---|
| 0 | (Size << 14) | 0x2 |
| 1 | Buffer |
Response[edit]
| Index Word | Description |
|---|---|
| 0 | Header code |
| 1 | Result code |
| 2 | u16, Actual read size |
Channels[edit]
Channel 2 (Audio)[edit]
Channel 2 returns the DSP DRAM addresses of structures located in the DSP Memory Region. DSP:ConvertProcessAddressFromDspDram can be used to convert these addresses into virtual memory addresses. The list of addresses and the length of the list vary depending on DSP firmware version.
Channel 3 (Binary)[edit]
The purpose of channel 3 is unknown. The behaviour of this pipe varies depending on DSP firmware version. Observed behaviours include:
- doing nothing.
- echoing what is returned to it.
- long strings of zeros.