blinky.c

Stellaris Luminary Micro 系列之 DK-LM3S102 多个学习范例全都是基于 Keil 工程版的范例, 而范例内容列举如下: 1.BitBand 2.Comparator

/*----------------------------------------------------------------------------
 *      R T L   K e r n e l   E x a m p l e
 *----------------------------------------------------------------------------
 *      Name:    BLINKY.C
 *      Purpose: RTX example program
 *      Rev.:    V3.04a / 17-jan-2007
 *----------------------------------------------------------------------------
 *      This code is part of the RealView Run-Time Library.
 *      Copyright (c) 2004-2007 KEIL - An ARM Company. All rights reserved. 
 *---------------------------------------------------------------------------*/

#include <RTL.h>
#include <LM3Sxxx.H>

OS_TID t_phaseA;                        /* assigned task id of task: phase_a */
OS_TID t_phaseB;                        /* assigned task id of task: phase_b */
OS_TID t_phaseC;                        /* assigned task id of task: phase_c */
OS_TID t_phaseD;                        /* assigned task id of task: phase_d */

#define LED_A    GPIO_PIN_0
#define LED_B    GPIO_PIN_1
#define LED_C    GPIO_PIN_2
#define LED_D    GPIO_PIN_3
#define LED_PINS (LED_A | LED_B | LED_C | LED_D)

#define LED_On(led)     GPIOPinWrite(GPIO_PORTB_BASE, led, led)
#define LED_Off(led)    GPIOPinWrite(GPIO_PORTB_BASE, led, 0)

/*----------------------------------------------------------------------------
 *        Function 'signal_func' called from multiple tasks
 *---------------------------------------------------------------------------*/
void signal_func (OS_TID task)  {
  os_dly_wait (100);                     /* delay 100 clock ticks            */
  os_evt_set (0x0001, task);             /* send event to task 'task'        */
  os_dly_wait (50);                      /* delay 50 clock ticks             */
}

/*----------------------------------------------------------------------------
 *        Task 1 'phaseA': Phase A output
 *---------------------------------------------------------------------------*/
void phaseA (void) __task {
  for (;;) {
    os_evt_wait_and (0x0001, 0xffff);    /* wait for an event flag 0x0001    */
    LED_On (LED_A);
    signal_func (t_phaseB);              /* call common signal function      */
    LED_Off(LED_A);
  }
}

/*----------------------------------------------------------------------------
 *        Task 2 'phaseB': Phase B output
 *---------------------------------------------------------------------------*/
void phaseB (void) __task {
  for (;;) {
    os_evt_wait_and (0x0001, 0xffff);    /* wait for an event flag 0x0001    */
    LED_On (LED_B);
    signal_func (t_phaseC);              /* call common signal function      */
    LED_Off(LED_B);
  }
}

/*----------------------------------------------------------------------------
 *        Task 3 'phaseC': Phase C output
 *---------------------------------------------------------------------------*/
void phaseC (void) __task {
  for (;;) {
    os_evt_wait_and (0x0001, 0xffff);    /* wait for an event flag 0x0001    */
    LED_On (LED_C);
    signal_func (t_phaseD);              /* call common signal function      */
    LED_Off(LED_C);
  }
}

/*----------------------------------------------------------------------------
 *        Task 4 'phaseD': Phase D output
 *---------------------------------------------------------------------------*/
void phaseD (void) __task {
  for (;;) {
    os_evt_wait_and (0x0001, 0xffff);    /* wait for an event flag 0x0001    */
    LED_On (LED_D);
    signal_func (t_phaseA);              /* call common signal function      */
    LED_Off(LED_D);
  }
}

/*----------------------------------------------------------------------------
 *        Task 5 'init': Initialize
 *---------------------------------------------------------------------------*/
void init (void) __task {

  /* Set the clocking to run directly from the crystal                        */
  SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | SYSCTL_XTAL_6MHZ);

  /* Set GPIOB LEDs pins as outputs */
  SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
  GPIODirModeSet(GPIO_PORTB_BASE, LED_PINS, GPIO_DIR_MODE_OUT);
  LED_Off (LED_A | LED_B | LED_C | LED_D);

  t_phaseA = os_tsk_create (phaseA, 0);  /* start task phaseA                */
  t_phaseB = os_tsk_create (phaseB, 0);  /* start task phaseB                */
  t_phaseC = os_tsk_create (phaseC, 0);  /* start task phaseC                */
  t_phaseD = os_tsk_create (phaseD, 0);  /* start task phaseD                */
  os_evt_set (0x0001, t_phaseA);         /* send signal event to task phaseA */
  os_tsk_delete_self ();
}

/*----------------------------------------------------------------------------
 *        Main: Initialize and start RTX Kernel
 *---------------------------------------------------------------------------*/
int main (void) {

  os_sys_init (init);                    /* Initialize RTX and start init    */
}

/*----------------------------------------------------------------------------
 * end of file
 *---------------------------------------------------------------------------*/