Difference between revisions of "Unit DMA"

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Line 5: Line 5:
 
----
 
----
  
−
''To be documented''
+
'''Ultibo DMA Interface unit'''
 +
 
 +
The DMA interfaces are 1 tier (Host only) whereas the USB interface is 3 tier (Host, Device and Driver).
  
 
=== Constants ===
 
=== Constants ===
Line 23: Line 25:
 
<br />  
 
<br />  
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
−
<div style="font-size: 14px; padding-left: 12px;">'''DMA host type constants''' <code> DMA_TYPE_* </code></div>
+
<div style="font-size: 14px; padding-left: 12px;">'''DMA host type''' <code> DMA_TYPE_* </code></div>
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
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| <code>DMA_TYPE_NONE = 0;</code>
 
| <code>DMA_TYPE_NONE = 0;</code>
 
| style="width: 50%;"|&nbsp;
 
| style="width: 50%;"|&nbsp;
 +
|-
 +
|colspan="2"|&nbsp;
 +
|-
 +
| <code>DMA_TYPE_MAX = 0;</code>
 +
| &nbsp;
 
|-
 
|-
 
|}
 
|}
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<br />  
 
<br />  
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
−
<div style="font-size: 14px; padding-left: 12px;">'''DMA host state constants''' <code> DMA_STATE_* </code></div>
+
<div style="font-size: 14px; padding-left: 12px;">'''DMA host state''' <code> DMA_STATE_* </code></div>
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
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|-
 
|-
 
| <code>DMA_STATE_ENABLED = 1;</code>
 
| <code>DMA_STATE_ENABLED = 1;</code>
 +
| &nbsp;
 +
|-
 +
|colspan="2"|&nbsp;
 +
|-
 +
| <code>DMA_STATE_MAX = 1;</code>
 
| &nbsp;
 
| &nbsp;
 
|-
 
|-
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<br />  
 
<br />  
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
−
<div style="font-size: 14px; padding-left: 12px;">'''DMA host flag constants''' <code> DMA_FLAG_* </code></div>
+
<div style="font-size: 14px; padding-left: 12px;">'''DMA host flag''' <code> DMA_FLAG_* </code></div>
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
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| <code>DMA_FLAG_BULK = $00000200;</code>
 
| <code>DMA_FLAG_BULK = $00000200;</code>
 
| Host supports bulk transfer
 
| Host supports bulk transfer
 +
|-
 +
| <code>DMA_FLAG_LITE = $00000400;</code>
 +
| Host supports "lite" transfer
 +
|-
 +
| <code>DMA_FLAG_40BIT = $00000800;</code>
 +
| Host supports 40-bit address transfer
 
|-
 
|-
 
|}
 
|}
 
</div></div>
 
</div></div>
−
<br />
+
<br />  
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
−
<div style="font-size: 14px; padding-left: 12px;">'''DMA request flag constants''' <code> DMA_REQUEST_FLAG_* </code></div>
+
<div style="font-size: 14px; padding-left: 12px;">'''DMA data flag''' <code> DMA_DATA_FLAG_* </code></div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
|colspan="2"|See: Platform DMA_DATA_FLAG_*
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
 +
<div style="font-size: 14px; padding-left: 12px;">'''DMA request flag''' <code> DMA_REQUEST_FLAG_* </code></div>
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
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| <code>DMA_REQUEST_FLAG_CYCLIC = $00000002;</code>
 
| <code>DMA_REQUEST_FLAG_CYCLIC = $00000002;</code>
 
| This is a cyclic request which loops around from tail to head
 
| This is a cyclic request which loops around from tail to head
 +
|-
 +
| <code>DMA_REQUEST_FLAG_COMPATIBLE = $00000004;</code>
 +
| If set then all buffers supplied are host configuration compatible (Sizing, Alignment, Flags)
 
|-
 
|-
 
|}
 
|}
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<br />  
 
<br />  
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
−
<div style="font-size: 14px; padding-left: 12px;">'''DMA logging constants''' <code> DMA_LOG_* </code></div>
+
<div style="font-size: 14px; padding-left: 12px;">'''DMA logging''' <code> DMA_LOG_* </code></div>
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
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| <code>DMA_LOG_LEVEL_INFO = LOG_LEVEL_INFO;</code>
 
| <code>DMA_LOG_LEVEL_INFO = LOG_LEVEL_INFO;</code>
 
| DMA informational messages, such as a device being attached or detached
 
| DMA informational messages, such as a device being attached or detached
 +
|-
 +
| <code>DMA_LOG_LEVEL_WARN = LOG_LEVEL_WARN;</code>
 +
| DMA warning messages
 
|-
 
|-
 
| <code>DMA_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR;</code>
 
| <code>DMA_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR;</code>
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----
 
----
  
−
''To be documented''
+
 
 +
'''DMA properties'''
 +
 
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 +
<code>PDMAProperties = ^TDMAProperties;</code>
 +
 
 +
<code>TDMAProperties = record</code>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
| <code>Flags:LongWord;</code>
 +
| Host flags (eg DMA_FLAG_STRIDE)
 +
|-
 +
| <code>Alignment:LongWord;</code>
 +
| Host data buffer alignment
 +
|-
 +
| <code>Multiplier:LongWord;</code>
 +
| Host data buffer multiplier
 +
|-
 +
| <code>Channels:LongWord;</code>
 +
| Total number of host channels
 +
|-
 +
| <code>MaxSize:LongWord;</code>
 +
| Maximum transfer size
 +
|-
 +
| <code>MaxCount:LongWord;</code>
 +
| Maximum Y count for 2D stride
 +
|-
 +
| <code>MaxLength:LongWord;</code>
 +
| Maximum X length for 2D stride
 +
|-
 +
| <code>MinStride:LongInt;</code>
 +
| Minimum stride value (Increment between rows) May be negative.
 +
|-
 +
| <code>MaxStride:LongWord;</code>
 +
| Maximum stride value (Increment between rows)
 +
|-
 +
|}
 +
</div></div> 
 +
 
 +
'''DMA enumeration callback'''
 +
 
 +
{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 +
|-
 +
| <code>TDMAEnumerate = function(DMA:PDMAHost; Data:Pointer):LongWord;</code>
 +
| style="width: 40%;"|
 +
|-
 +
|}
 +
 
 +
'''DMA notification callback'''
 +
 
 +
{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 +
|-
 +
| <code>TDMANotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;</code>
 +
| style="width: 40%;"|
 +
|-
 +
|}
 +
 
 +
'''DMA host start'''
 +
 
 +
{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 +
|-
 +
| <code>TDMAHostStart = function(DMA:PDMAHost):LongWord;</code>
 +
| style="width: 40%;"|
 +
|-
 +
|}
 +
 
 +
'''DMA host stop'''
 +
 
 +
{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 +
|-
 +
| <code>TDMAHostStop = function(DMA:PDMAHost):LongWord;</code>
 +
| style="width: 40%;"|
 +
|-
 +
|}
 +
 
 +
'''DMA host reset'''
 +
 
 +
{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 +
|-
 +
| <code>TDMAHostReset = function(DMA:PDMAHost):LongWord;</code>
 +
| style="width: 40%;"|
 +
|-
 +
|}
 +
 
 +
'''DMA host submit'''
 +
 
 +
{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 +
|-
 +
| <code>TDMAHostSubmit = function(DMA:PDMAHost; Request:PDMARequest):LongWord;</code>
 +
| style="width: 40%;"|
 +
|-
 +
|}
 +
 
 +
'''DMA host cancel'''
 +
 
 +
{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 +
|-
 +
| <code>TDMAHostCancel = function(DMA:PDMAHost; Request:PDMARequest):LongWord;</code>
 +
| style="width: 40%;"|
 +
|-
 +
|}
 +
 
 +
'''DMA host properties'''
 +
 
 +
{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 +
|-
 +
| <code>TDMAHostProperties = function(DMA:PDMAHost; Properties:PDMAProperties):LongWord;</code>
 +
| style="width: 40%;"|
 +
|-
 +
|}
 +
 
 +
'''DMA host'''
 +
 
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 +
<code>PDMAHost = ^TDMAHost;</code>
 +
 
 +
<code>TDMAHost = record</code>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
|colspan="2"|''Device Properties''
 +
|-
 +
| <code>Device:TDevice;</code>
 +
| The Device entry for this DMA host
 +
|-
 +
|colspan="2"|''DMA Properties''
 +
|-
 +
| <code>DMAId:LongWord;</code>
 +
| Unique Id of this DMA host in the DMA host table
 +
|-
 +
| <code>DMAId:LongWord;</code>
 +
| Unique Id of this DMA host in the DMA host table
 +
|-
 +
| <code>DMAState:LongWord;</code>
 +
| DMA state (eg DMA_STATE_ENABLED)
 +
|-
 +
| <code>HostStart:TDMAHostStart;</code>
 +
| A Host specific HostStart method implementing the standard DMA host interface (Mandatory)
 +
|-
 +
| <code>HostStop:TDMAHostStop;</code>
 +
| A Host specific HostStop method implementing the standard DMA host interface (Mandatory)
 +
|-
 +
| <code>HostReset:TDMAHostReset;</code>
 +
| A Host specific HostReset method implementing the standard DMA host interface (Or nil if the default method is suitable)
 +
|-
 +
| <code>HostSubmit:TDMAHostSubmit;</code>
 +
| A Host specific HostSubmit method implementing the standard DMA host interface (Mandatory)
 +
|-
 +
| <code>HostCancel:TDMAHostCancel;</code>
 +
| A Host specific HostCancel method implementing the standard DMA host interface (Mandatory)
 +
|-
 +
| <code>HostProperties:TDMAHostProperties;</code>
 +
| A Host specific HostProperties method implementing the standard DMA host interface (Or nil if the default method is suitable)
 +
|-
 +
|colspan="2"|''Driver Properties''
 +
|-
 +
| <code>Lock:TMutexHandle;</code>
 +
| Host lock
 +
|-
 +
| <code>Alignment:LongWord;</code>
 +
| Host data buffer alignment
 +
|-
 +
| <code>Multiplier:LongWord;</code>
 +
| Host data buffer multiplier
 +
|-
 +
| <code>Properties:TDMAProperties;</code>
 +
| Host properties
 +
|-
 +
| <code>LastError:LongWord;</code>
 +
| Last error to occur on this host
 +
|-
 +
| <code>PendingCount:LongWord;</code>
 +
| Number of DMA requests pending for this host
 +
|-
 +
| <code>WaiterThread:TThreadId;</code>
 +
| Thread waiting for pending requests to complete
 +
|-
 +
|colspan="2"|''Statistics Properties''
 +
|-
 +
| <code>RequestCount:LongWord;</code>
 +
| Number of DMA requests that have been submitted to this host
 +
|-
 +
| <code>RequestErrors:LongWord;</code>
 +
| Number of DMA requests that have failed on this host
 +
|-
 +
|colspan="2"|''Internal Properties''
 +
|-
 +
| <code>Prev:PDMAHost;</code>
 +
| Previous entry in DMA host table
 +
|-
 +
| <code>Next:PDMAHost;</code>
 +
| Next entry in DMA host table
 +
|-
 +
|}
 +
</div></div>
 +
 
 +
'''DMA request completed'''
 +
 
 +
{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 +
|-
 +
| <code>TDMARequestCompleted = procedure(Request:PDMARequest);</code>
 +
| style="width: 40%;"|
 +
|-
 +
|}
 +
 
 +
'''DMA request'''
 +
 
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 +
<code>PDMARequest = ^TDMARequest;</code>
 +
 
 +
<code>TDMARequest = record</code>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
|colspan="2"|Note: Forward declared to satisfy DMAHost
 +
|-
 +
|colspan="2"|''Request Properties''
 +
|-
 +
| <code>Host:PDMAHost;</code>
 +
| &nbsp;
 +
|-
 +
| <code>Data:PDMAData;</code>
 +
| List of data blocks for this request
 +
|-
 +
| <code>Flags:LongWord;</code>
 +
| Flags for the request (eg DMA_REQUEST_FLAG_RELEASE)
 +
|-
 +
| <code>Direction:LongWord;</code>
 +
| The direction of the DMA request (eg DMA_DIR_MEM_TO_MEM)
 +
|-
 +
| <code>Peripheral:LongWord;</code>
 +
| The peripheral ID for data request gating (eg DMA_DREQ_ID_NONE)
 +
|-
 +
| <code>Callback:TDMARequestCompleted;</code>
 +
| Callback function that will be called when this DMA request has been successfully completed or has failed
 +
|-
 +
| <code>DriverData:Pointer;</code>
 +
| Private data for the completion callback (Optional)
 +
|-
 +
|colspan="2"|''Result Properties''
 +
|-
 +
| <code>Status:LongWord;</code>
 +
| Status of the request (ERROR_SUCCESS if successful, or another error code if the request failed)
 +
|-
 +
|colspan="2"|''Driver Properties (Private variables for use by Host drivers)''
 +
|-
 +
| <code>ControlBlocks:Pointer;</code>
 +
| &nbsp;
 +
|-
 +
|}
 +
</div></div>
 +
<br />
  
 
=== Public variables ===
 
=== Public variables ===
 
----
 
----
  
−
''To be documented''
+
 
 +
'''DMA logging'''
 +
 
 +
{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 +
|-
 +
| <code>DMA_DEFAULT_LOG_LEVEL:LongWord = DMA_LOG_LEVEL_DEBUG;</code>
 +
| style="width: 40%;"|Minimum level for DMA messages. Only messages with level greater than or equal to this will be printed.
 +
|-
 +
|}
 +
{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 +
|-
 +
| <code>DMA_LOG_ENABLED:Boolean;</code>
 +
| style="width: 40%;"|
 +
|-
 +
|}
 +
<br />
  
 
=== Function declarations ===
 
=== Function declarations ===
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| Pointer to new DMA entry or nil if DMA could not be created
 
| Pointer to new DMA entry or nil if DMA could not be created
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Size'''
+
! Size
−
| Size in bytes to allocate for new DMA (Including the DMA entry")
+
| Size in bytes to allocate for new DMA (Including the DMA entry)
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| Pointer to new DMA entry or nil if DMA could not be created
 
| Pointer to new DMA entry or nil if DMA could not be created
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
Line 352: Line 653:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''DMA'''
+
! DMA
 
| The DMA host that the request will be sent to
 
| The DMA host that the request will be sent to
 
|-
 
|-
−
! '''Size'''
+
! Size
 
| The size of the data buffer to allocate
 
| The size of the data buffer to allocate
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| The newly allocated buffer or nil on failure
 
| The newly allocated buffer or nil on failure
 
|-
 
|-
Line 370: Line 671:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''DMA'''
+
! DMA
 
| The DMA host that the request will be sent to
 
| The DMA host that the request will be sent to
 
|-
 
|-
−
! '''Size'''
+
! Size
 
| The size of the data buffer to allocate (Updated on return to actual size)
 
| The size of the data buffer to allocate (Updated on return to actual size)
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| The newly allocated buffer or nil on failure
 
| The newly allocated buffer or nil on failure
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| This differs from DMABufferAllocate in that it updates the size value to reflect the actual size of the buffer allocated which may be required for some uses
 
| This differs from DMABufferAllocate in that it updates the size value to reflect the actual size of the buffer allocated which may be required for some uses
 
|-
 
|-
Line 391: Line 692:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''DMA'''
+
! DMA
 
| The DMA host that the request will be sent to
 
| The DMA host that the request will be sent to
 
|-
 
|-
−
! '''Buffer'''
+
! Buffer
 
| The data buffer to validate
 
| The data buffer to validate
 
|-
 
|-
−
! '''Size'''
+
! Size
 
| The size of the data buffer
 
| The size of the data buffer
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS on success or another error code on failure (ERROR_NOT_COMPATIBLE if not compatible with host)
 
| ERROR_SUCCESS on success or another error code on failure (ERROR_NOT_COMPATIBLE if not compatible with host)
 
|-
 
|-
−
! '''Note'''
+
! Note
−
| Does not check for cache coherency requirements (Shared, Non Cached) only alignment and size. Buffers used as the source of a DMA request do not neccessarily need to meet alignment and size requirements, however buffers used as a destintation must meet these requirements or the caller must take appropriate actions to prevent undesiraable side effects from cache invalidation.
+
| Does not check for cache coherency requirements (Shared, Non Cached) only alignment and size. Buffers used as the source of a DMA request do not necessarily need to meet alignment and size requirements, however buffers used as a destination must meet these requirements or the caller must take appropriate actions to prevent undesirable side effects from cache invalidation.
 
|-
 
|-
 
|}
 
|}
Line 415: Line 716:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Data'''
+
! Data
 
| The buffer to be released
 
| The buffer to be released
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS on success or another error code on failure
 
| ERROR_SUCCESS on success or another error code on failure
 
|-
 
|-
Line 433: Line 734:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''DMA'''
+
! DMA
 
| The DMA host this request will be sent to
 
| The DMA host this request will be sent to
 
|-
 
|-
−
! '''Data'''
+
! Data
 
| A linked list of DMA data blocks for the transfer (Optional)
 
| A linked list of DMA data blocks for the transfer (Optional)
 
|-
 
|-
−
! '''Callback'''
+
! Callback
 
| The callback function to be called on completion of the request
 
| The callback function to be called on completion of the request
 
|-
 
|-
−
! '''DriverData'''
+
! DriverData
 
| Driver private data for the callback (Optional)
 
| Driver private data for the callback (Optional)
 
|-
 
|-
−
! '''Direction'''
+
! Direction
 
| The direction of the DMA request (eg DMA_DIR_MEM_TO_MEM)
 
| The direction of the DMA request (eg DMA_DIR_MEM_TO_MEM)
 
|-
 
|-
−
! '''Peripheral'''
+
! Peripheral
 
| The peripheral ID for data request gating (eg DMA_DREQ_ID_NONE)
 
| The peripheral ID for data request gating (eg DMA_DREQ_ID_NONE)
 
|-
 
|-
−
! '''Flags'''
+
! Flags
 
| Additional flags for this request (eg DMA_REQUEST_FLAG_CYCLIC)
 
| Additional flags for this request (eg DMA_REQUEST_FLAG_CYCLIC)
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| The newly allocated request or nil on failure
 
| The newly allocated request or nil on failure
 
|-
 
|-
Line 466: Line 767:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Request'''
+
! Request
 
| The request to be released
 
| The request to be released
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS on success or another error code on failure
 
| ERROR_SUCCESS on success or another error code on failure
 
|-
 
|-
Line 481: Line 782:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Request'''
+
! Request
 
| The request to be submitted
 
| The request to be submitted
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| The request will be completed asynchronously by the DMA host and the completion callback will be called when the request has either succeeded or failed
 
| The request will be completed asynchronously by the DMA host and the completion callback will be called when the request has either succeeded or failed
 
|-
 
|-
Line 499: Line 800:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Request'''
+
! Request
 
| The request to be cancelled
 
| The request to be cancelled
 
|-
 
|-
−
! '''Return'''
+
! Return''
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
Line 514: Line 815:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Request'''
+
! Request
 
| The DMA request which has completed
 
| The DMA request which has completed
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| DMA host drivers may call this on a worker thread
 
| DMA host drivers may call this on a worker thread
 
|-
 
|-
Line 532: Line 833:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''DMA'''
+
! DMA
 
| The DMA host to execute the request on
 
| The DMA host to execute the request on
 
|-
 
|-
−
! '''Data'''
+
! Data
 
| A linked list of DMA data blocks for the transfer
 
| A linked list of DMA data blocks for the transfer
 
|-
 
|-
−
! '''Direction'''
+
! Direction
 
| The direction of the DMA request (eg DMA_DIR_MEM_TO_MEM)
 
| The direction of the DMA request (eg DMA_DIR_MEM_TO_MEM)
 
|-
 
|-
−
! '''Peripheral'''
+
! Peripheral
 
| The peripheral ID for data request gating (eg DMA_DREQ_ID_NONE)
 
| The peripheral ID for data request gating (eg DMA_DREQ_ID_NONE)
 
|-
 
|-
−
! '''Flags'''
+
! Flags
 
| Additional flags for this transfer request (eg DMA_REQUEST_FLAG_CYCLIC)
 
| Additional flags for this transfer request (eg DMA_REQUEST_FLAG_CYCLIC)
 
|-
 
|-
−
! '''Timeout'''
+
! Timeout
 
| Milliseconds to wait for request to complete (INFINITE to wait forever)
 
| Milliseconds to wait for request to complete (INFINITE to wait forever)
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| An internal callback will be specified and the function will wait for the transfer to complete
 
| An internal callback will be specified and the function will wait for the transfer to complete
 
|-
 
|-
Line 556: Line 857:
 
</div></div>
 
</div></div>
 
<br />
 
<br />
−
 
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
<pre style="border: 0; padding-bottom:0px;">function DMATransferRequestEx(DMA:PDMAHost; Data:PDMAData; Callback:TDMARequestCompleted; DriverData:Pointer; Direction,Peripheral,Flags:LongWord):LongWord;</pre>
 
<pre style="border: 0; padding-bottom:0px;">function DMATransferRequestEx(DMA:PDMAHost; Data:PDMAData; Callback:TDMARequestCompleted; DriverData:Pointer; Direction,Peripheral,Flags:LongWord):LongWord;</pre>
Line 563: Line 863:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''DMA'''
+
! DMA
 
| The DMA host to execute the request on
 
| The DMA host to execute the request on
 
|-
 
|-
−
! '''Data'''
+
! Data
 
| A linked list of DMA data blocks for the transfer
 
| A linked list of DMA data blocks for the transfer
 
|-
 
|-
−
! '''Callback'''
+
! Callback
 
| The callback function to be called on completion of the request
 
| The callback function to be called on completion of the request
 
|-
 
|-
−
! '''DriverData'''
+
! DriverData
 
| Driver private data for the callback (Optional)
 
| Driver private data for the callback (Optional)
 
|-
 
|-
−
! '''Direction'''
+
! Direction
 
| The direction of the DMA request (eg DMA_DIR_MEM_TO_MEM)
 
| The direction of the DMA request (eg DMA_DIR_MEM_TO_MEM)
 
|-
 
|-
−
! '''Peripheral'''
+
! Peripheral
 
| The peripheral ID for data request gating (eg DMA_DREQ_ID_NONE)
 
| The peripheral ID for data request gating (eg DMA_DREQ_ID_NONE)
 
|-
 
|-
−
! '''Flags'''
+
! Flags
 
| Additional flags for this transfer request (eg DMA_REQUEST_FLAG_CYCLIC)
 
| Additional flags for this transfer request (eg DMA_REQUEST_FLAG_CYCLIC)
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| The request will be passed to the callback with the DriverData field set to the DriverData passed to this function. On completion of the callback the request will automatically be released by the internal callback handler.
 
| The request will be passed to the callback with the DriverData field set to the DriverData passed to this function. On completion of the callback the request will automatically be released by the internal callback handler.
 
|-
 
|-
Line 596: Line 896:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Request'''
+
! Request
 
| The DMA request which has completed
 
| The DMA request which has completed
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| This is the internal callback for DMATransferRequest
 
| This is the internal callback for DMATransferRequest
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
 +
'''RTL DMA functions'''
 +
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function SysDMAAvailable:Boolean;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Check if a DMA host is available</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Note
 +
| None documented
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function SysDMATransfer(Data:PDMAData; Direction,Peripheral:LongWord):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Perform a DMA transfer using the list of DMA data blocks provided</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Data
 +
| A linked list of DMA data blocks for the transfer
 +
|-
 +
! Direction
 +
| The direction of the DMA request (eg DMA_DIR_MEM_TO_MEM)
 +
|-
 +
! Peripheral
 +
| The peripheral ID for data request gating (eg DMA_DREQ_ID_NONE)
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function SysDMAFillMemory(Dest:Pointer; Size:LongWord; Value:Byte):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Fill memory at the destination address using DMA</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Dest
 +
| The address to start the memory fill
 +
|-
 +
! Size
 +
| The size of memory to fill in bytes
 +
|-
 +
! Value
 +
| The value to fill the memory with
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function SysDMACopyMemory(Source,Dest:Pointer; Size:LongWord):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Copy memory from the source to the destination address using DMA</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Source
 +
| The source address to start the memory copy
 +
|-
 +
! Dest
 +
| The destination address to start the memory copy
 +
|-
 +
! Size
 +
| The size of memory to copy in bytes
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function SysDMAReadPeripheral(Address,Dest:Pointer; Size,Peripheral:LongWord):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Read from a periperal address to the destination address using DMA</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Address
 +
| The address of the periperhal register to read from
 +
|-
 +
! Dest
 +
| The destination address to start writing to
 +
|-
 +
! Size
 +
| The size of the read in bytes
 +
|-
 +
! Peripheral
 +
| The peripheral ID for data request gating (eg DMA_DREQ_ID_UART_RX)
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function SysDMAWritePeripheral(Source,Address:Pointer; Size,Peripheral:LongWord):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Write to a peripheral address from the source address using DMA</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Source
 +
| The source address to start reading from
 +
|-
 +
! Address
 +
| The address of the peripheral register to write to
 +
|-
 +
! Size
 +
| The size of the write in bytes
 +
|-
 +
! Peripheral
 +
| The peripheral ID for data request gating (eg DMA_DREQ_ID_UART_TX)
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function SysDMAAllocateBuffer(Size:LongWord):Pointer;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Allocate a buffer compatible with DMA memory reads or writes</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Size
 +
| The size of the buffer to allocate
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function SysDMAAllocateBufferEx(var Size:LongWord):Pointer;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Allocate a buffer compatible with DMA memory reads or writes</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Size
 +
| The size of the buffer to allocate (Updated on return to actual size)
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function SysDMAReleaseBuffer(Buffer:Pointer):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Release a buffer allocated with DMAAllocateBuffer</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Buffer
 +
| The buffer to be released
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
 +
'''DMA helper functions'''
 +
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function DMAGetCount:LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current DMA host count</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Note
 +
| None documented
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function DMAHostGetDefault:PDMAHost;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current default DMA host</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Note
 +
| None documented
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function DMAHostSetDefault(DMA:PDMAHost):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Set the current default DMA device</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Note
 +
| None documented
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function DMAHostCheck(DMA:PDMAHost):PDMAHost;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Check if the supplied DMA is in the DMA host table</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Note
 +
| None documented
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function DMATypeToString(DMAType:LongWord):String;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Convert a DMA type value to a string</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Note
 +
| None documented
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function DMAStateToString(DMAState:LongWord):String;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Convert a DMA state value to a string</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Note
 +
| None documented
 +
|-
 +
|}
 +
</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">procedure DMALog(Level:Integer; DMA:PDMAHost; const AText:String);</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| None documented
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">procedure DMALogInfo(DMA:PDMAHost; const AText:String); inline;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| None documented
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">procedure DMALogWarn(DMA:PDMAHost; const AText:String); inline;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| None documented
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">procedure DMALogError(DMA:PDMAHost; const AText:String); inline;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| None documented
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">procedure DMALogDebug(DMA:PDMAHost; const AText:String); inline;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| None documented
 
|-
 
|-
 
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|}

Latest revision as of 04:51, 10 October 2023

Return to Unit Reference


Description

Ultibo DMA Interface unit

The DMA interfaces are 1 tier (Host only) whereas the USB interface is 3 tier (Host, Device and Driver).

Constants


[Expand]
DMA specific constants DMA_*


[Expand]
DMA host type DMA_TYPE_*


[Expand]
DMA host state DMA_STATE_*


[Expand]
DMA host flag DMA_FLAG_*


[Expand]
DMA data flag DMA_DATA_FLAG_*


[Expand]
DMA request flag DMA_REQUEST_FLAG_*


[Expand]
DMA logging DMA_LOG_*


Type definitions


DMA properties

[Expand]

PDMAProperties = ^TDMAProperties;

TDMAProperties = record

DMA enumeration callback

TDMAEnumerate = function(DMA:PDMAHost; Data:Pointer):LongWord;

DMA notification callback

TDMANotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;

DMA host start

TDMAHostStart = function(DMA:PDMAHost):LongWord;

DMA host stop

TDMAHostStop = function(DMA:PDMAHost):LongWord;

DMA host reset

TDMAHostReset = function(DMA:PDMAHost):LongWord;

DMA host submit

TDMAHostSubmit = function(DMA:PDMAHost; Request:PDMARequest):LongWord;

DMA host cancel

TDMAHostCancel = function(DMA:PDMAHost; Request:PDMARequest):LongWord;

DMA host properties

TDMAHostProperties = function(DMA:PDMAHost; Properties:PDMAProperties):LongWord;

DMA host

[Expand]

PDMAHost = ^TDMAHost;

TDMAHost = record

DMA request completed

TDMARequestCompleted = procedure(Request:PDMARequest);

DMA request

[Expand]

PDMARequest = ^TDMARequest;

TDMARequest = record


Public variables


DMA logging

DMA_DEFAULT_LOG_LEVEL:LongWord = DMA_LOG_LEVEL_DEBUG; Minimum level for DMA messages. Only messages with level greater than or equal to this will be printed.
DMA_LOG_ENABLED:Boolean;


Function declarations


Initialization functions

[Expand] 
procedure DMAInit;
Description: To be documented


DMA host functions

[Expand] 
function DMAHostStart(DMA:PDMAHost):LongWord;
Description: To be documented


[Expand] 
function DMAHostStop(DMA:PDMAHost):LongWord;
Description: To be documented


[Expand] 
function DMAHostReset(DMA:PDMAHost):LongWord;
Description: To be documented


[Expand] 
function DMAHostProperties(DMA:PDMAHost; Properties:PDMAProperties):LongWord;
Description: To be documented


[Expand] 
function DMAHostCreate:PDMAHost;
Description: Create a new DMA entry


[Expand] 
function DMAHostCreateEx(Size:LongWord):PDMAHost;
Description: Create a new DMA entry


[Expand] 
function DMAHostDestroy(DMA:PDMAHost):LongWord;
Description: Destroy an existing DMA entry


[Expand] 
function DMAHostRegister(DMA:PDMAHost):LongWord;
Description: Register a new DMA in the DMA host table


[Expand] 
function DMAHostDeregister(DMA:PDMAHost):LongWord;
Description: Deregister a DMA from the DMA host table


[Expand] 
function DMAHostFind(DMAId:LongWord):PDMAHost;
Description: To be documented


[Expand] 
function DMAHostEnumerate(Callback:TDMAEnumerate; Data:Pointer):LongWord;
Description: To be documented


[Expand] 
function DMAHostNotification(DMA:PDMAHost; Callback:TDMANotification; Data:Pointer; Notification,Flags:LongWord):LongWord;
Description: To be documented


DMA data functions

[Expand] 
function DMADataCount(Data:PDMAData):LongWord;
Description: Return the total number of data blocks in the linked list


[Expand] 
function DMADataFlags(Data:PDMAData):LongWord;
Description: Return the combined flags of the data blocks in the linked list


[Expand] 
function DMADataMaximum(Data:PDMAData):LongWord;
Description: Return the size of the largest data block in the linked list


DMA buffer functions

[Expand] 
function DMABufferAllocate(DMA:PDMAHost; Size:LongWord):Pointer; inline;
Description: Allocate a data buffer for a DMA request


[Expand] 
function DMABufferAllocateEx(DMA:PDMAHost; var Size:LongWord):Pointer;
Description: Allocate a data buffer for a DMA request


[Expand] 
function DMABufferValidate(DMA:PDMAHost; Buffer:Pointer; Size:LongWord):LongWord;
Description: Validate a data buffer for a DMA request against the DMA host requirements


[Expand] 
function DMABufferRelease(Buffer:Pointer):LongWord;
Description: Release a data buffer from a DMA request


DMA request functions

[Expand] 
function DMARequestAllocate(DMA:PDMAHost; Data:PDMAData; Callback:TDMARequestCompleted; DriverData:Pointer; Direction,Peripheral,Flags:LongWord):PDMARequest;
Description: Allocate a new DMA request


[Expand] 
function DMARequestRelease(Request:PDMARequest):LongWord;
Description: Release and destroy a DMA request


[Expand] 
function DMARequestSubmit(Request:PDMARequest):LongWord;
Description: Submit a DMA request to a DMA host


[Expand] 
function DMARequestCancel(Request:PDMARequest):LongWord;
Description: Cancel a DMA request previously submitted to a DMA host


[Expand] 
procedure DMARequestComplete(Request:PDMARequest);
Description: Called by a DMA host when a DMA request completes


DMA transfer functions

[Expand] 
function DMATransferRequest(DMA:PDMAHost; Data:PDMAData; Direction,Peripheral,Flags,Timeout:LongWord):LongWord;
Description: Perform a DMA transfer request with the supplied data blocks on the supplied host


[Expand] 
function DMATransferRequestEx(DMA:PDMAHost; Data:PDMAData; Callback:TDMARequestCompleted; DriverData:Pointer; Direction,Peripheral,Flags:LongWord):LongWord;
Description: Perform a DMA transfer request with the supplied data blocks on the supplied host


[Expand] 
procedure DMATransferRequestComplete(Request:PDMARequest);
Description: Called when a DMA transfer request completes


RTL DMA functions

[Expand] 
function SysDMAAvailable:Boolean;
Description: Check if a DMA host is available


[Expand] 
function SysDMATransfer(Data:PDMAData; Direction,Peripheral:LongWord):LongWord;
Description: Perform a DMA transfer using the list of DMA data blocks provided


[Expand] 
function SysDMAFillMemory(Dest:Pointer; Size:LongWord; Value:Byte):LongWord;
Description: Fill memory at the destination address using DMA


[Expand] 
function SysDMACopyMemory(Source,Dest:Pointer; Size:LongWord):LongWord;
Description: Copy memory from the source to the destination address using DMA


[Expand] 
function SysDMAReadPeripheral(Address,Dest:Pointer; Size,Peripheral:LongWord):LongWord;
Description: Read from a periperal address to the destination address using DMA


[Expand] 
function SysDMAWritePeripheral(Source,Address:Pointer; Size,Peripheral:LongWord):LongWord;
Description: Write to a peripheral address from the source address using DMA


[Expand] 
function SysDMAAllocateBuffer(Size:LongWord):Pointer;
Description: Allocate a buffer compatible with DMA memory reads or writes


[Expand] 
function SysDMAAllocateBufferEx(var Size:LongWord):Pointer;
Description: Allocate a buffer compatible with DMA memory reads or writes


[Expand] 
function SysDMAReleaseBuffer(Buffer:Pointer):LongWord;
Description: Release a buffer allocated with DMAAllocateBuffer


DMA helper functions

[Expand] 
function DMAGetCount:LongWord;
Description: Get the current DMA host count


[Expand] 
function DMAHostGetDefault:PDMAHost;
Description: Get the current default DMA host


[Expand] 
function DMAHostSetDefault(DMA:PDMAHost):LongWord;
Description: Set the current default DMA device


[Expand] 
function DMAHostCheck(DMA:PDMAHost):PDMAHost;
Description: Check if the supplied DMA is in the DMA host table


[Expand] 
function DMATypeToString(DMAType:LongWord):String;
Description: Convert a DMA type value to a string


[Expand] 
function DMAStateToString(DMAState:LongWord):String;
Description: Convert a DMA state value to a string


[Expand] 
procedure DMALog(Level:Integer; DMA:PDMAHost; const AText:String);
Description: To be documented


[Expand] 
procedure DMALogInfo(DMA:PDMAHost; const AText:String); inline;
Description: To be documented


[Expand] 
procedure DMALogWarn(DMA:PDMAHost; const AText:String); inline;
Description: To be documented


[Expand] 
procedure DMALogError(DMA:PDMAHost; const AText:String); inline;
Description: To be documented


[Expand] 
procedure DMALogDebug(DMA:PDMAHost; const AText:String); inline;
Description: To be documented


Return to Unit Reference

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