pio.c

最新版IAR FOR ARM（EWARM）5.11中的代码例子

/*************************************************************************
 *
 *    Used with ICCARM and AARM.
 *
 *    (c) Copyright IAR Systems 2007
 *
 *    File name   : pio.c
 *    Description : Main file
 *
 *    History :
 *    1. Date        : August 2, 2007
 *       Author      : Stanimir Bonev
 *       Description : Create
 *
 *  This example project shows how to use the IAR Embedded Workbench for ARM
 * to develop code for the Samsung-S3F4A0K evaluation board. It shows
 * basic use of PIO.
 *  The example flashing LED DS4 (P1.9)
 *
 * Jumpers:
 *  J5 P1.9 - filled
 *  All other jumpers are in default position regarding board's manual
 *
 *    $Revision: 18083 $
 **************************************************************************/
#include <samsung\ios3f4a0k.h>
#include "arm_comm.h"
#include "board.h"

/*************************************************************************
 * Function Name: main
 * Parameters: none
 * Return: none
 *
 * Description: Main
 *
 *************************************************************************/
void main (void)
{
  // Enable PIO block
  PIO1_ECR = 1;
  // PIO Software Reset
  PIO1_CR = 1;
  // P1.9 is PIO
  PIO1_PER  = 1 << 9;
  // Enable Push-pull
  PIO1_MDDR = 1 << 9;
  // Set P1.9 to output
  PIO1_OER  = 1 << 9;
  // Clear output (LED off)
  PIO1_CODR = 1 << 9;
  while(1)
  {
    for(volatile Int32U i = 1000000; i; i--);
    // LED On
    PIO1_SODR = 1 << 9;
    for(volatile Int32U i = 1000000; i; i--);
    // LED Off
    PIO1_CODR = 1 << 9;
  }
}