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124 | --
-- Author: Brent Seidel
-- Date: 9-Aug-2024
--
-- This file is part of bbs_embed.
-- Bbs_embed is free software: you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation, either version 3 of the License, or (at your
-- option) any later version.
--
-- bbs_embed is distributed in the hope that it will be useful, but
-- WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-- Public License for more details.
--
-- You should have received a copy of the GNU General Public License along
-- with bbs_embed. If not, see <https://www.gnu.org/licenses/>.--
--
package body BBS.embed.PWM is
--
function pwm_new return PWM is
begin
return new PWM_record;
end;
--
procedure configure(self : not null access PWM_record'class;
pin : string; index : pwm_range) is
temp : Ada.Text_IO.File_Type;
begin
--
-- Set pin function
--
Ada.Text_IO.Open(temp, Ada.Text_IO.Out_File, pin);
Ada.Text_IO.Put_Line(temp, "pwm");
Ada.Text_IO.Close(temp);
--
-- Setup the record
--
self.PWM_index := index;
self.period := 0;
self.high_time := 0;
end;
--
procedure enable(self : not null access PWM_record'class; state : boolean) is
temp : Ada.Text_IO.File_Type;
begin
Ada.Text_IO.Open(temp, Ada.Text_IO.Out_File, pwm_ctrl(self.pwm_index).all & "/enable");
if state then
Ada.Text_IO.Put_Line(temp, "1");
else
Ada.Text_IO.Put_Line(temp, "0");
end if;
Ada.Text_IO.Close(temp);
end;
--
procedure set_period(self : not null access PWM_record'class; period : nanoseconds) is
temp : Ada.Text_IO.File_Type;
value : constant string := Ada.Strings.Fixed.Trim(integer'Image(integer(period)),
Ada.Strings.Left);
begin
Ada.Text_IO.Open(temp, Ada.Text_IO.Out_File, pwm_ctrl(self.pwm_index).all & "/period");
Ada.Text_IO.Put_Line(temp, value);
self.period := period;
Ada.Text_IO.Close(temp);
end;
--
procedure set_period(self : not null access PWM_record'class; period : Duration) is
temp : Ada.Text_IO.File_Type;
value : constant string := Ada.Strings.Fixed.Trim(integer'Image(integer(period*1_000_000_000.0)),
Ada.Strings.Left);
begin
Ada.Text_IO.Open(temp, Ada.Text_IO.Out_File, pwm_ctrl(self.pwm_index).all & "/period");
Ada.Text_IO.Put_Line(temp, value);
self.period := nanoseconds(period*1_000_000_000.0);
Ada.Text_IO.Close(temp);
end;
--
procedure set_high(self : not null access PWM_record'class; high : nanoseconds) is
temp : Ada.Text_IO.File_Type;
value : constant string := Ada.Strings.Fixed.Trim(integer'Image(integer(high)),
Ada.Strings.Left);
begin
Ada.Text_IO.Open(temp, Ada.Text_IO.Out_File, pwm_ctrl(self.pwm_index).all & "/duty_cycle");
Ada.Text_IO.Put_Line(temp, value);
self.high_time := high;
Ada.Text_IO.Close(temp);
end;
--
procedure set_high(self : not null access PWM_record'class; high : Duration) is
temp : Ada.Text_IO.File_Type;
value : constant string := Ada.Strings.Fixed.Trim(integer'Image(integer(high*1_000_000_000.0)),
Ada.Strings.Left);
begin
Ada.Text_IO.Open(temp, Ada.Text_IO.Out_File, pwm_ctrl(self.pwm_index).all & "/duty_cycle");
Ada.Text_IO.Put_Line(temp, value);
self.high_time := nanoseconds(high*1_000_000_000.0);
Ada.Text_IO.Close(temp);
end;
--
procedure set_rate(self : not null access PWM_record'class; rate : BBS.units.freq_hz) is
temp : Ada.Text_IO.File_Type;
period : constant nanoseconds := nanoseconds(1_000_000_000.0/float(rate));
value : constant string := Ada.Strings.Fixed.Trim(integer'Image(integer(period)),
Ada.Strings.Left);
begin
Ada.Text_IO.Open(temp, Ada.Text_IO.Out_File, pwm_ctrl(self.pwm_index).all & "/period");
Ada.Text_IO.Put_Line(temp, value);
self.period := period;
Ada.Text_IO.Close(temp);
end;
--
procedure set_duty(self : not null access PWM_record'class; duty : float) is
temp : Ada.Text_IO.File_Type;
high : constant nanoseconds := nanoseconds(float(self.period)*duty/100.0);
value : constant string := Ada.Strings.Fixed.Trim(integer'Image(integer(high)),
Ada.Strings.Left);
begin
Ada.Text_IO.Open(temp, Ada.Text_IO.Out_File, pwm_ctrl(self.pwm_index).all & "/duty_cycle");
Ada.Text_IO.Put_Line(temp, value);
self.high_time := high;
Ada.Text_IO.Close(temp);
end;
--
end;
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