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if Bg_Buffer /= Null_Buffer then
-- PFC and blending
DMA2D_Periph.CR.MODE := DMA2D_MODE'Enum_Rep (M2M_BLEND);
elsif Src_Buffer.Color_Mode = Dst_Buffer.Color_Mode then
-- Direct memory transfer
DMA2D_Periph.CR.MODE := DMA2D_MODE'Enum_Rep (M2M);
else
DMA2D_Periph.CR.MODE := DMA2D_MODE'Enum_Rep (M2M_PFC);
end if;
-- SOURCE CONFIGURATION
DMA2D_Periph.FGPFCCR :=
(CM => DMA2D_Color_Mode'Enum_Rep (Src_Buffer.Color_Mode),
AM => DMA2D_AM'Enum_Rep (NO_MODIF),
ALPHA => 255,
others => <>);
if Src_Buffer.Color_Mode = L8 or else Src_Buffer.Color_Mode = L4 then
if Src_Buffer.CLUT_Addr = System.Null_Address then
raise Program_Error with "Source CLUT address required";
end if;
DMA2D_Periph.FGCMAR := To_Word (Src_Buffer.CLUT_Addr);
DMA2D_Periph.FGCMAR := To_Word (Src_Buffer.CLUT_Addr);
DMA2D_Periph.FGPFCCR.CS := (case Src_Buffer.Color_Mode is
when L8 => 2**8 - 1,
when L4 => 2**4 - 1,
when others => 0);
-- Set CLUT mode to RGB888
DMA2D_Periph.FGPFCCR.CCM := Src_Buffer.CLUT_Color_Mode = RGB888;
-- Start loading the CLUT
DMA2D_Periph.FGPFCCR.START := True;
while DMA2D_Periph.FGPFCCR.START loop
-- Wait for CLUT loading...
null;
end loop;
end if;
DMA2D_Periph.FGOR := (LO => UInt14 (Src_Buffer.Width - Width),
others => <>);
DMA2D_Periph.FGMAR := To_Word (Src_Buffer.Addr) + Src_Off;
if Bg_Buffer /= Null_Buffer then
declare
Bg_Off : constant UInt32 := Offset (Bg_Buffer, X_Bg, Y_Bg);
begin
DMA2D_Periph.BGPFCCR.CM :=
DMA2D_Color_Mode'Enum_Rep (Bg_Buffer.Color_Mode);
DMA2D_Periph.BGMAR := To_Word (Bg_Buffer.Addr) + Bg_Off;
DMA2D_Periph.BGPFCCR.CS := 0;
DMA2D_Periph.BGPFCCR.START := False;
DMA2D_Periph.BGOR :=
(LO => UInt14 (Bg_Buffer.Width - Width), others => <>);
if Bg_Buffer.Color_Mode = L8 or else Bg_Buffer.Color_Mode = L4 then
if Bg_Buffer.CLUT_Addr = System.Null_Address then
raise Program_Error with "Background CLUT address required";
end if;
DMA2D_Periph.BGCMAR := To_Word (Bg_Buffer.CLUT_Addr);
DMA2D_Periph.BGPFCCR.CS := (case Bg_Buffer.Color_Mode is
when L8 => 2**8 - 1,
when L4 => 2**4 - 1,
when others => 0);
-- Set CLUT mode to RGB888
DMA2D_Periph.BGPFCCR.CCM := Bg_Buffer.CLUT_Color_Mode = RGB888;
-- Start loading the CLUT
DMA2D_Periph.BGPFCCR.START := True;
while DMA2D_Periph.BGPFCCR.START loop
-- Wait for CLUT loading...
null;
end loop;
end if;
Function Definition: procedure Demo_Timer_PWM is -- low-level demo of the PWM capabilities
Function Body: Period : constant := 1000;
Output_Channel : constant Timer_Channel := Channel_2;
-- The LED driven by this example is determined by the channel selected.
-- That is so because each channel of Timer_4 is connected to a specific
-- LED in the alternate function configuration on this board. We will
-- initialize all of the LEDs to be in the AF mode for Timer_4. The
-- particular channel selected is completely arbitrary, as long as the
-- selected GPIO port/pin for the LED matches the selected channel.
--
-- Channel_1 is connected to the green LED.
-- Channel_2 is connected to the orange LED.
-- Channel_3 is connected to the red LED.
-- Channel_4 is connected to the blue LED.
--------------------
-- Configure_LEDs --