hal.c

ipod无线遥控接收端,可控制播放,暂停,音量,前进,后退.

#include "hal.h"

/*
*********************************************************************************************************
*                                         Uart_init
*
* Description      :
* Arguments        :
* Returned Values  : none
* Note(s)/Warnings :
*********************************************************************************************************
*/
void Uart_init(void){

    UCSR0B = 0x00; 
    
    //RXCn TXCn UDREn FEn DORn UPEn U2Xn MPCMn (UCSRnA)
    //  0   0    0     0   0    0    0    0
    UCSR0A = B0000_0000;
    
    //UMSELn1 UMSELn0 UPMn1 UPMn0 USBSn UCSZn1 UCSZn0 UCPOLn (UCSRnC)
    //   0      0       0     0     0    1      1      0
    UCSR0C = B0000_0110;
    
    UBRR0L = 0x14; 
    UBRR0H = 0x00; 
    
    //RXCIEn TXCIEn UDRIEn RXENn TXENn UCSZn2 RXB8n TXB8n (UCSRnB)
    //  1     1       0     1     1      0      0     0
    UCSR0B = B1101_1000;
}

#pragma vector=USART_TX_vect 
__interrupt void Uart_tx_isr(void)
{
    if(--cmdn ){ 
        UDR0 = *Cmd++;
    }else{
        SET_LED;
    }
}

//======================================================
void Hal_init(void)
{
    _CLI();
    
    CLKPR=0x80;
    CLKPR=0x03;   
  
    DDRB  = B0010_1100;
	PORTB = B0001_0011;
	DDRC  = B0000_0100;
	PORTC = B0100_0000;
	DDRD  = B1110_0010;
	PORTD = B0000_1101;
    
    
    PCMSK0 = B0000_0010; 
    PCINT0_ENABLE();
  
    OCR2A = 43;
    TCCR2A = B0000_0010;
    TCCR2B = B0000_0110;
    TIMSK2 = B0000_0010; 
    
    Uart_init();
    EICRA = 0x00; //extended ext ints
    EIMSK = 0x00;
  
    //– – – – – OCIE2B OCIE2A TOIE2 (TIMSK2)
    SPI_INIT(SCLK_4_M);
    SPI_ENABLE();
    
    CCxx_init();	
    _SEI(); 
}