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Picosdk1.5.1 dma library #31

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f82a8ae
dma library first commit
jpmandon Nov 11, 2025
d2aba25
Create dma example folder
jpmandon Nov 11, 2025
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Delete dma
jpmandon Nov 11, 2025
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Create readme
jpmandon Nov 11, 2025
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Added example file for dma
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74 changes: 74 additions & 0 deletions dma/dma_memory_transfer.lpi
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<?xml version="1.0" encoding="UTF-8"?>
<CONFIG>
<ProjectOptions>
<Version Value="12"/>
<General>
<Flags>
<MainUnitHasCreateFormStatements Value="False"/>
<MainUnitHasTitleStatement Value="False"/>
<MainUnitHasScaledStatement Value="False"/>
</Flags>
<SessionStorage Value="InProjectDir"/>
<Title Value="dma_memory_transfer"/>
<UseAppBundle Value="False"/>
<ResourceType Value="res"/>
</General>
<BuildModes>
<Item Name="Default" Default="True"/>
</BuildModes>
<PublishOptions>
<Version Value="2"/>
<UseFileFilters Value="True"/>
</PublishOptions>
<RunParams>
<FormatVersion Value="2"/>
</RunParams>
<Units>
<Unit>
<Filename Value="dma_memory_transfer.lpr"/>
<IsPartOfProject Value="True"/>
</Unit>
</Units>
</ProjectOptions>
<CompilerOptions>
<Version Value="11"/>
<Target>
<Filename Value="bin/dma_memory_transfer"/>
</Target>
<SearchPaths>
<IncludeFiles Value="$(ProjOutDir)"/>
<OtherUnitFiles Value="../units"/>
<UnitOutputDirectory Value="lib/$(TargetCPU)-$(TargetOS)"/>
</SearchPaths>
<CodeGeneration>
<TargetProcessor Value="ARMV6M"/>
<TargetCPU Value="arm"/>
<TargetOS Value="embedded"/>
</CodeGeneration>
<Linking>
<Debugging>
<DebugInfoType Value="dsDwarf2"/>
<UseLineInfoUnit Value="False"/>
</Debugging>
</Linking>
<Other>
<CustomOptions Value="-Wpraspi_pico
-godwarfsets
-godwarfcpp
-Xu"/>
</Other>
</CompilerOptions>
<Debugging>
<Exceptions>
<Item>
<Name Value="EAbort"/>
</Item>
<Item>
<Name Value="ECodetoolError"/>
</Item>
<Item>
<Name Value="EFOpenError"/>
</Item>
</Exceptions>
</Debugging>
</CONFIG>
33 changes: 33 additions & 0 deletions dma/dma_memory_transfer.lpr
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program dma_memory_transfer;

{$MODE OBJFPC}
{$MEMORY 4096,4096}

uses
pico_c,
pico_dma_c;

// this example show how to transfer data from read_zone array
// to write_zone array with DMA

var
config : uint32;
read_zone : array[0..4] of byte = (1,2,3,4,5);
write_zone : array[0..4] of byte = (0,0,0,0,0);
i : integer;

begin
for i:=0 to 4 do
write_zone[i]:=0;
config:= dma_channel_get_default_config(DMA_CHANNEL0);
DMA.ch[DMA_CHANNEL0].al1_ctrl:=config; // set default config
dma_set_transfer_data_size(DMA_CHANNEL0,DMA_SIZE_8); // set word size
dma_set_read_increment(DMA_CHANNEL0,true); // set auto increment for reading
dma_set_write_increment(DMA_CHANNEL0,true); // set auto increment for writing
dma_set_read_address(DMA_CHANNEL0,@read_zone); // set read address
dma_set_write_address(DMA_CHANNEL0,@write_zone); // set write address
dma_set_count_of(DMA_CHANNEL0,SizeOf(read_zone)); // set number of byte to transfer and start DMA

while True do; // Transfer is done
end.

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