Raptor:DMA Address Space Trigger: Difference between revisions
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[[ | [[Raptor-Platform|Return to the main Raptor page]] | ||
[[Raptor:J1939 Direct Memory Access|Return to Direct Memory Access page]] | [[Raptor:J1939 Direct Memory Access|Return to Direct Memory Access page]] | ||
[[File:RaptorDMAAddressSpaceTrigger.jpg|right|frame|Raptor™ DMA Address Space Trigger]] | [[File:RaptorDMAAddressSpaceTrigger.jpg|right|frame|Raptor™ Raptor DMA Address Space Trigger]] | ||
== Description == | == Description == | ||
<p>This block is used with the raptor_j1939_dma_AS_def block to trigger action to be taken when an operation is requested on the custom address space. This block will execute its function call subsystem whenever a read, write or erase is requested in the custom address space for the pointers specified. Multiple address space triggers can be used for a single custom address space.</p> | <p>This block is used with the raptor_j1939_dma_AS_def block to trigger action to be taken when an operation is requested on the custom address space. This block will execute its function call subsystem whenever a read, write or erase is requested in the custom address space for the pointers specified. Multiple address space triggers can be used for a single custom address space.</p> | ||
== Outputs == | == Outputs == | ||
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| Specifies the write user level for each item handled by this block. This may be a vector, or a scalar. If a scalar is used then all pointer addresses handled by this block will have the same write user level. | | Specifies the write user level for each item handled by this block. This may be a vector, or a scalar. If a scalar is used then all pointer addresses handled by this block will have the same write user level. | ||
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Latest revision as of 20:17, 12 September 2023
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Return to Direct Memory Access page
Description
This block is used with the raptor_j1939_dma_AS_def block to trigger action to be taken when an operation is requested on the custom address space. This block will execute its function call subsystem whenever a read, write or erase is requested in the custom address space for the pointers specified. Multiple address space triggers can be used for a single custom address space.
Outputs
| Output | Type | Description |
|---|---|---|
| Fn Call | function call | Trigger indicating a DMA request has been received for the address space. |
| Operation | uint8 | Requested operation. |
| Pointer | uint32 | Address space pointer for the received reqeust. |
| Length | uint16 | Length of data. |
| Data | uint8[] | Data received with request. |
Parameters
| Parameter | Type | Description |
|---|---|---|
| Address Space Name | String | This is the name of address space being defined. |
| Pointer Address(es) | uint32[] | The pointer addresses that will be handled by this trigger block. A vector can be specified to handle multiple pointer addresses with the same trigger block. |
| Bytes per Item | uint32[] | Specifies the number of bytes for each item handled by this block. This may be a vector, or a scalar. If a scalar is used then all pointer addresses handled by this block will have the same size. |
| Read Level(s) | uint8[] | Specifies the read user level for each item handled by this block. This may be a vector, or a scalar. If a scalar is used then all pointer addresses handled by this block will have the same read user level. |
| Write Level(s) | uint8[] | Specifies the write user level for each item handled by this block. This may be a vector, or a scalar. If a scalar is used then all pointer addresses handled by this block will have the same write user level. |