{ Simple LED toggle program for the STM32F4-Discovery board }

{ Copyright (C)2014-2018, Philip Munts, President, Munts AM Corp.             }
{                                                                             }
{ Redistribution and use in source and binary forms, with or without          }
{ modification, are permitted provided that the following conditions are met: }
{                                                                             }
{ * Redistributions of source code must retain the above copyright notice,    }
{   this list of conditions and the following disclaimer.                     }
{                                                                             }
{ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" }
{ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE   }
{ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE  }
{ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE   }
{ LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR         }
{ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF        }
{ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS    }
{ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN     }
{ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)     }
{ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE  }
{ POSSIBILITY OF SUCH DAMAGE.                                                 }

PROGRAM test_leds;

VAR
  LD3_ORANGE : sbit AT GPIOD_ODR.B13;
  LD4_GREEN  : sbit AT GPIOD_ODR.B12;
  LD5_RED    : sbit AT GPIOD_ODR.B14;
  LD6_BLUE   : sbit AT GPIOD_ODR.B15;
  orange     : boolean;

BEGIN

  { Configure LED outputs }

  GPIO_Digital_Output(@GPIOD_BASE, _GPIO_PINMASK_12);
  GPIO_Digital_Output(@GPIOD_BASE, _GPIO_PINMASK_13);
  GPIO_Digital_Output(@GPIOD_BASE, _GPIO_PINMASK_14);
  GPIO_Digital_Output(@GPIOD_BASE, _GPIO_PINMASK_15);

  { Initialize LED outputs }

  LD3_ORANGE := True;
  LD4_GREEN  := False;
  LD5_RED    := False;
  LD6_BLUE   := False;

  { Toggle LED outputs }

  WHILE True DO
    BEGIN
      orange := LD3_ORANGE;
      LD3_ORANGE := LD4_GREEN;
      LD4_GREEN := LD6_BLUE;
      LD6_BLUE := LD5_RED;
      LD5_RED := orange;

      Delay_ms(100);
    END
END.