bsp.c

μC／OS—ⅡV：2.80 对 ATMega256 单片机的移植程序代码。

/*
*********************************************************************************************************
*                                           Atmel ATmega256
*                                         Board Support Package
*
*                                (c) Copyright 2005, Micrium, Weston, FL
*                                          All Rights Reserved
*
*
* File : BSP.C
* By   : Jean J. Labrosse
*********************************************************************************************************
*/

#include <includes.h>

/*
*********************************************************************************************************
*                                              CONSTANTS
*********************************************************************************************************
*/


/*
*********************************************************************************************************
*                                               DATA TYPES
*********************************************************************************************************
*/

typedef  void (*PFNCT)(void);

/*
*********************************************************************************************************
*                                               VARIABLES
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*                                               PROTOTYPES
*********************************************************************************************************
*/

static  void    LED_Init(void);
static  void    PB_Init(void);

/*
*********************************************************************************************************
*                                         BSP INITIALIZATION
*
* Description : This function should be called by your application code before you make use of any of the
*               functions found in this module.
*               
* Arguments   : none
*********************************************************************************************************
*/

void  BSP_Init (void)
{
    LED_Init();
    PB_Init();
}


/*
*********************************************************************************************************
*                                         BSP INITIALIZATION
*
* Description : This function should be called by your application code before you make use of any of the
*               functions found in this module.
*               
* Arguments   : none
*********************************************************************************************************
*/

static  void  LED_Init (void)
{
    DDRD  = 0xFF;                                 /* All PORTD pins are outputs                        */
    PORTD = 0xFF;
    LED_Off(0);                                   /* Turn ON all the LEDs                              */
}

/*
*********************************************************************************************************
*                                             LED ON
*
* Description : This function is used to control any or all the LEDs on the board.
*               
* Arguments   : led    is the number of the LED to control
*                      0    indicates that you want ALL the LEDs to be ON
*                      1    turns ON LED1 on the board
*                      .
*                      .
*                      8    turns ON LED8 on the board
*********************************************************************************************************
*/

void  LED_On (INT8U led)
{
    switch (led) {
        case 0:
             PORTD  =  0x00;
             break;

        case 1:
             PORTD &= ~0x01;
             break;

        case 2:
             PORTD &= ~0x02;
             break;

        case 3:
             PORTD &= ~0x04;
             break;

        case 4:
             PORTD &= ~0x08;
             break;

        case 5:
             PORTD &= ~0x10;
             break;

        case 6:
             PORTD &= ~0x20;
             break;

        case 7:
             PORTD &= ~0x40;
             break;

        case 8:
             PORTD &= ~0x80;
             break;
    }
}

/*
*********************************************************************************************************
*                                             LED OFF
*
* Description : This function is used to control any or all the LEDs on the board.
*               
* Arguments   : led    is the number of the LED to turn OFF
*                      0    indicates that you want ALL the LEDs to be OFF
*                      1    turns OFF LED1 on the board
*                      .
*                      .
*                      8    turns OFF LED8 on the board
*********************************************************************************************************
*/

void  LED_Off (INT8U led)
{
    switch (led) {
        case 0:
             PORTD  =  0xFF;
             break;

        case 1:
             PORTD |=  0x01;
             break;

        case 2:
             PORTD |=  0x02;
             break;

        case 3:
             PORTD |=  0x04;
             break;

        case 4:
             PORTD |=  0x08;
             break;

        case 5:
             PORTD |=  0x10;
             break;

        case 6:
             PORTD |=  0x20;
             break;

        case 7:
             PORTD |=  0x40;
             break;

        case 8:
             PORTD |=  0x80;
             break;
    }
}

/*
*********************************************************************************************************
*                                        LED TOGGLE
*
* Description : This function is used to toggle the state of any or all the LEDs on the board.
*               
* Arguments   : led    is the number of the LED to toggle
*                      0    indicates that you want ALL the LEDs to toggle
*                      1    Toggle LED1 on the board
*                      .
*                      .
*                      8    Toggle LED8 on the board
*********************************************************************************************************
*/

void  LED_Toggle (INT8U led)
{
    switch (led) {
        case 0:
             PORTD ^=  0xFF;
             break;

        case 1:
             PORTD ^=  0x01;
             break;

        case 2:
             PORTD ^=  0x02;
             break;

        case 3:
             PORTD ^=  0x04;
             break;

        case 4:
             PORTD ^=  0x08;
             break;

        case 5:
             PORTD ^=  0x10;
             break;

        case 6:
             PORTD ^=  0x20;
             break;

        case 7:
             PORTD ^=  0x40;
             break;

        case 8:
             PORTD ^=  0x80;
             break;
    }
}

/*
*********************************************************************************************************
*                                        PUSH-BUTTON INITIALIZATION
*
* Description : This function should be called by your application code before you make use of any of the
*               functions found in this module.
*               
* Arguments   : none
*********************************************************************************************************
*/

static  void  PB_Init (void)
{
    DDRA  = 0x00;                                 /* All PORTA pins are inputs                         */
}

/*
*********************************************************************************************************
*                                         GET 'PUSH BUTTON' STATUS
*
* Description : This function is used to get the status of any push button on the board.
*
* Arguments   : push_button    is the number of the push button to probe
*                              1    probe the push button Sw0
*                              2    probe the push button Sw1
*                              3    probe the push button Sw2
*                              4    probe the push button Sw3
*                              5    probe the push button Sw4
*                              6    probe the push button Sw5
*                              7    probe the push button Sw6
*                              8    probe the push button Sw7
*
* Returns     : TRUE           if the button is pressed
*               FALSE          if the button is not pressed
*********************************************************************************************************
*/

BOOLEAN  PB_GetStatus (INT8U pb_id)
{
    INT8U  sw;
    INT8U  mask;


    sw   = ~PINA;
    mask = 1 << (pb_id - 1);
    if (sw & mask) {
        return (TRUE);
    } else {
        return (FALSE);
    }
}