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VCO_Input := HSE_VALUE / UInt32 (RCC_Periph.PLLCFGR.PLLM);
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end if;
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if Input_Selector = 0 then
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-- PLLSAI is the clock source
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-- VCO out = VCO in & PLLSAIN
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-- SAI firstlevel = VCO out / PLLSAIQ
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SAI_First_Level :=
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VCO_Input * UInt32 (RCC_Periph.PLLSAICFGR.PLLSAIN) /
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UInt32 (RCC_Periph.PLLSAICFGR.PLLSAIQ);
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-- SAI frequency is SAI First level / PLLSAIDIVQ
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return SAI_First_Level / UInt32 (RCC_Periph.DCKCFGR.PLLSAIDIVQ);
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else
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-- PLLI2S as clock source
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SAI_First_Level :=
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VCO_Input * UInt32 (RCC_Periph.PLLI2SCFGR.PLLI2SN) /
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UInt32 (RCC_Periph.PLLI2SCFGR.PLLI2SQ);
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-- SAI frequency is SAI First level / PLLI2SDIVQ
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return SAI_First_Level / UInt32 (RCC_Periph.DCKCFGR.PLLIS2DIVQ + 1);
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end if;
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end Get_Input_Clock;
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------------------
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-- Enable_Clock --
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------------------
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procedure Enable_Clock (This : in out SDMMC_Controller)
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is
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begin
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if This.Periph.all'Address /= SDIO_Base then
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raise Unknown_Device;
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end if;
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RCC_Periph.APB2ENR.SDIOEN := True;
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end Enable_Clock;
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-----------
|
-- Reset --
|
-----------
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procedure Reset (This : in out SDMMC_Controller)
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is
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begin
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if This.Periph.all'Address /= SDIO_Base then
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raise Unknown_Device;
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end if;
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RCC_Periph.APB2RSTR.SDIORST := True;
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RCC_Periph.APB2RSTR.SDIORST := False;
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end Reset;
|
----------------------
|
-- Set_Clock_Source --
|
----------------------
|
procedure Set_Clock_Source
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(This : in out SDMMC_Controller;
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Src : SDIO_Clock_Source)
|
is
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Src_Val : constant Boolean := Src = Src_Sysclk;
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begin
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if This.Periph.all'Address /= SDIO_Base then
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raise Unknown_Device;
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end if;
|
RCC_Periph.DCKCFGR.SDMMCSEL := Src_Val;
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case Src is
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when Src_Sysclk =>
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STM32.SDMMC.Set_Clk_Src_Speed
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(This, System_Clock_Frequencies.SYSCLK);
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when Src_48Mhz =>
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STM32.SDMMC.Set_Clk_Src_Speed
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(This, 48_000_000);
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end case;
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end Set_Clock_Source;
|
------------------------------
|
-- System_Clock_Frequencies --
|
------------------------------
|
function System_Clock_Frequencies return RCC_System_Clocks
|
is
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Source : constant UInt2 := RCC_Periph.CFGR.SWS;
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Result : RCC_System_Clocks;
|
begin
|
Result.I2SCLK := 0;
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case Source is
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when 0 =>
|
-- HSI as source
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Result.SYSCLK := HSI_VALUE;
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when 1 =>
|
-- HSE as source
|
Result.SYSCLK := HSE_VALUE;
|
when 2 =>
|
-- PLL as source
|
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