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332 | with System; use System;
with System.Machine_Code;
with STM32_SVD.RCC; use STM32_SVD.RCC;
package body STM32.Device is
-- FIXME ADL_Config.High_Speed_External_Clock;
-- No board, so no ADL_Config
HSE_VALUE : constant := 0;
-- External oscillator in Hz
HSI_VALUE : constant := 8_000_000;
-- Internal oscillator in Hz
HSI48_VALUE : constant := 48_000_000;
-- internal oscillator in Hz
HPRE_Presc_Table : constant array (UInt4) of UInt32 :=
[1, 1, 1, 1, 1, 1, 1, 1, 2, 4, 8, 16, 64, 128, 256, 512];
PPRE_Presc_Table : constant array (UInt3) of UInt32 :=
[1, 1, 1, 1, 2, 4, 8, 16];
procedure Delay_Cycles (Cycles : UInt32) is
use System.Machine_Code;
use ASCII;
Tmp : constant UInt32 := 1 + Cycles / 2;
begin
Asm
("1:" & LF & HT & "sub %0, #1" & LF & HT & "bne 1b" & LF & HT,
Inputs => (UInt32'Asm_Input ("r", Tmp)), Clobber => "r3",
Volatile => True);
end Delay_Cycles;
------------------------------
-- GPIO_Port_Representation --
------------------------------
function GPIO_Port_Representation (Port : GPIO_Port) return UInt4 is
begin
-- TODO: rather ugly to have this board-specific range here
if Port'Address = GPIOA_Base then
return 0;
elsif Port'Address = GPIOB_Base then
return 1;
elsif Port'Address = GPIOC_Base then
return 2;
elsif Port'Address = GPIOD_Base then
return 3;
elsif Port'Address = GPIOE_Base then
return 4;
elsif Port'Address = GPIOF_Base then
return 5;
else
raise Program_Error;
end if;
end GPIO_Port_Representation;
------------------
-- Enable_Clock --
------------------
procedure Enable_Clock (This : aliased in out GPIO_Port) is
begin
if This'Address = GPIOA_Base then
RCC_Periph.AHBENR.IOPAEN := True;
elsif This'Address = GPIOB_Base then
RCC_Periph.AHBENR.IOPBEN := True;
elsif This'Address = GPIOC_Base then
RCC_Periph.AHBENR.IOPCEN := True;
elsif This'Address = GPIOD_Base then
RCC_Periph.AHBENR.IOPDEN := True;
-- There is an error in the SVD file where this BIT (21 in
-- RCC_AHBENR) is missing.
-- elsif This'Address = GPIOE_Base then
-- RCC_Periph.AHBENR.IOPEEN := True;
elsif This'Address = GPIOF_Base then
RCC_Periph.AHBENR.IOPFEN := True;
else
raise Unknown_Device;
end if;
end Enable_Clock;
------------------
-- Enable_Clock --
------------------
procedure Enable_Clock (Point : GPIO_Point) is
begin
Enable_Clock (Point.Periph.all);
end Enable_Clock;
------------------
-- Enable_Clock --
------------------
procedure Enable_Clock (Points : GPIO_Points) is
begin
for Point of Points loop
Enable_Clock (Point.Periph.all);
end loop;
end Enable_Clock;
-----------
-- Reset --
-----------
procedure Reset (This : aliased in out GPIO_Port) is
begin
if This'Address = GPIOA_Base then
RCC_Periph.AHBRSTR.IOPARST := True;
RCC_Periph.AHBRSTR.IOPARST := False;
elsif This'Address = GPIOB_Base then
RCC_Periph.AHBRSTR.IOPBRST := True;
RCC_Periph.AHBRSTR.IOPBRST := False;
elsif This'Address = GPIOC_Base then
RCC_Periph.AHBRSTR.IOPCRST := True;
RCC_Periph.AHBRSTR.IOPCRST := False;
elsif This'Address = GPIOD_Base then
RCC_Periph.AHBRSTR.IOPDRST := True;
RCC_Periph.AHBRSTR.IOPDRST := False;
-- There is an error in the SVD file where this BIT (21 in RCC_AHBRSTR) is
-- missing.
-- elsif This'Address = GPIOE_Base then
-- RCC_Periph.AHBRSTR.IOPERST := True;
-- RCC_Periph.AHBRSTR.IOPERST := False;
elsif This'Address = GPIOF_Base then
RCC_Periph.AHBRSTR.IOPFRST := True;
RCC_Periph.AHBRSTR.IOPFRST := False;
else
raise Unknown_Device;
end if;
end Reset;
-----------
-- Reset --
-----------
procedure Reset (Point : GPIO_Point) is
begin
Reset (Point.Periph.all);
end Reset;
-----------
-- Reset --
-----------
procedure Reset (Points : GPIO_Points) is
Do_Reset : Boolean;
begin
for J in Points'Range loop
Do_Reset := True;
for K in Points'First .. J - 1 loop
if Points (K).Periph = Points (J).Periph then
Do_Reset := False;
exit;
end if;
end loop;
if Do_Reset then
Reset (Points (J).Periph.all);
end if;
end loop;
end Reset;
------------------
-- Enable_Clock --
------------------
procedure Enable_Clock (This : aliased in out USART) is
begin
if This.Periph.all'Address = USART1_Base then
RCC_Periph.APB2ENR.USART1EN := True;
elsif This.Periph.all'Address = USART2_Base then
RCC_Periph.APB1ENR.USART2EN := True;
elsif This.Periph.all'Address = USART3_Base then
RCC_Periph.APB1ENR.USART3EN := True;
elsif This.Periph.all'Address = USART4_Base then
RCC_Periph.APB1ENR.USART4EN := True;
else
raise Unknown_Device;
end if;
end Enable_Clock;
-----------
-- Reset --
-----------
procedure Reset (This : aliased in out USART) is
begin
if This.Periph.all'Address = USART1_Base then
RCC_Periph.APB2RSTR.USART1RST := True;
RCC_Periph.APB2RSTR.USART1RST := False;
elsif This.Periph.all'Address = USART2_Base then
RCC_Periph.APB1RSTR.USART2RST := True;
RCC_Periph.APB1RSTR.USART2RST := False;
elsif This.Periph.all'Address = USART3_Base then
RCC_Periph.APB1RSTR.USART3RST := True;
RCC_Periph.APB1RSTR.USART3RST := False;
elsif This.Periph.all'Address = USART4_Base then
RCC_Periph.APB1RSTR.USART4RST := True;
RCC_Periph.APB1RSTR.USART4RST := False;
else
raise Unknown_Device;
end if;
end Reset;
------------------------------
-- System_Clock_Frequencies --
------------------------------
function System_Clock_Frequencies return RCC_System_Clocks is
Source : constant UInt2 := RCC_Periph.CFGR.SWS;
Result : RCC_System_Clocks;
begin
case Source is
when 0 =>
-- HSI as source
Result.SYSCLK := HSI_VALUE;
when 1 =>
-- HSE as source
Result.SYSCLK := HSE_VALUE;
when 2 =>
-- PLL as source
declare
Input_Source : constant Uint2 := RCC_Periph.CFGR.PLLSRC;
Prediv : constant UInt32 := UInt32 (RCC_Periph.CFGR2.PREDIV);
Pllmul : constant UInt32 := UInt32 (RCC_Periph.CFGR.PLLMUL);
Pllval : UInt32 := HSI_VALUE;
begin
case Input_Source is
when 0 =>
Pllval := HSI_VALUE / 2;
when 1 =>
Pllval := HSI_VALUE / Prediv;
when 2 =>
Pllval := HSE_VALUE / Prediv;
when 3 =>
Pllval := HSI48_VALUE / Prediv;
end case;
Pllval := Pllval * Pllmul;
Result.SYSCLK := Pllval;
end;
when 3 =>
Result.SYSCLK := HSI48_VALUE;
end case;
declare
HPRE : constant UInt4 := RCC_Periph.CFGR.HPRE;
PPRE : constant UInt3 := RCC_Periph.CFGR.PPRE;
begin
Result.HCLK := Result.SYSCLK / HPRE_Presc_Table (HPRE);
Result.PCLK := Result.HCLK / PPRE_Presc_Table (PPRE);
end;
return Result;
end System_Clock_Frequencies;
procedure Enable_Clock (This : in out Timer) is
begin
if This'Address = TIM1_Base then
RCC_Periph.APB2ENR.TIM1EN := True;
elsif This'Address = TIM2_Base then
RCC_Periph.APB1ENR.TIM2EN := True;
elsif This'Address = TIM3_Base then
RCC_Periph.APB1ENR.TIM3EN := True;
elsif This'Address = TIM14_Base then
RCC_Periph.APB1ENR.TIM14EN := True;
elsif This'Address = TIM15_Base then
RCC_Periph.APB2ENR.TIM15EN := True;
elsif This'Address = TIM16_Base then
RCC_Periph.APB2ENR.TIM16EN := True;
elsif This'Address = TIM17_Base then
RCC_Periph.APB2ENR.TIM17EN := True;
elsif This'Address = TIM6_Base then
RCC_Periph.APB1ENR.TIM6EN := True;
elsif This'Address = TIM7_Base then
RCC_Periph.APB1ENR.TIM7EN := True;
else
raise Unknown_Device;
end if;
end Enable_Clock;
-----------
-- Reset --
-----------
procedure Reset (This : in out Timer) is
begin
if This'Address = TIM1_Base then
RCC_Periph.APB2RSTR.TIM1RST := True;
RCC_Periph.APB2RSTR.TIM1RST := False;
elsif This'Address = TIM2_Base then
RCC_Periph.APB1RSTR.TIM2RST := True;
RCC_Periph.APB1RSTR.TIM2RST := False;
elsif This'Address = TIM3_Base then
RCC_Periph.APB1RSTR.TIM3RST := True;
RCC_Periph.APB1RSTR.TIM3RST := False;
elsif This'Address = TIM14_Base then
RCC_Periph.APB1RSTR.TIM14RST := True;
RCC_Periph.APB1RSTR.TIM14RST := False;
elsif This'Address = TIM15_Base then
RCC_Periph.APB2RSTR.TIM15RST := True;
RCC_Periph.APB2RSTR.TIM15RST := False;
elsif This'Address = TIM16_Base then
RCC_Periph.APB2RSTR.TIM16RST := True;
RCC_Periph.APB2RSTR.TIM16RST := False;
elsif This'Address = TIM17_Base then
RCC_Periph.APB2RSTR.TIM17RST := True;
RCC_Periph.APB2RSTR.TIM17RST := False;
elsif This'Address = TIM6_Base then
RCC_Periph.APB1RSTR.TIM6RST := True;
RCC_Periph.APB1RSTR.TIM6RST := False;
elsif This'Address = TIM7_Base then
RCC_Periph.APB1RSTR.TIM7RST := True;
RCC_Periph.APB1RSTR.TIM7RST := False;
else
raise Unknown_Device;
end if;
end Reset;
end STM32.Device;
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