main.h

AVR单片机实现SPI通信完整源码,可直接拿过来用了

// Compiler : IAR EWAVR
// Target : M8
// Crystal: 8Mhz


//the .h file of main.c
#define   uchar   unsigned char
#define   uint    unsigned int
#define   SET_BIT(x,y)  (x |= ( 1 << y ))     //set the bit
#define   CLR_BIT(x,y)  (x &= ~( 1 << y ))    //clear the bit
#define   GET_BIT(x,y)  (x & (1 << y ))       //get the bit

#define   KEY_PRESSED_TIME        10          //the time to get rid of wobble of key
#define   KEY_LONG_PRESSED_TIME   100         //the time judge the long pressing of key

#define   ENCODER_SECOND_PIN      7           //the encoder's second signal pin connect to PORTB.7

__regvar __no_init uchar uart_rec_data @ 15;  //global variable in register

union udata
{
  uchar at_all;
  struct sdata
  {
    unsigned bit0:1;
    unsigned bit1:1;
    unsigned bit2:1;
    unsigned bit3:1;
    unsigned bit4:1;
    unsigned bit5:1;
    unsigned bit6:1;
    unsigned bit7:1;
  };
}status_flag;
                                                 //encoder act flag,each bit has different functin
                                                 //bit.0-whether it in effect or not;1 in effect;0 not
                                                 //bit.1-whether it acted or not; 1 acted; 0 not acted
                                                 //bit.2-it's round in clockwise or anticlocwise;1 clockwise
                                                 //bit.3-use to scan,
struct data
{
    unsigned bit0:1;
    unsigned bit1:1;
    unsigned bit2:1;
    unsigned bit3:1;
    unsigned bit4:1;
    unsigned bit5:1;
    unsigned bit6:1;
    unsigned bit7:1;
};
struct data act_flag = {0,0,0,0,0,0,0,0};

uchar   LED_CONTROL_FLAG = 0x00;                   //
uchar   adc_result[4]    = {0x00,0x00,0x00,0x00};  //save the ADC result
uchar   max = 0x00;
uchar   min = 0x00;
uchar   result  = 0x00;
//EEPROM
unsigned char read_eep(unsigned int address)
{
 unsigned char temp;
 while(GET_BIT(EECR,EEWE))
      ;
 __disable_interrupt();
 EEAR = address;
 SET_BIT(EECR,EERE);
 temp = EEDR;
 __enable_interrupt();
 return temp;
}

void write_eep(unsigned int address,unsigned char data)
{
 while(GET_BIT(EECR,EEWE))
      ;
 EEAR = address;
 EEDR = data;
 __disable_interrupt();
 SET_BIT(EECR,EEMWE);
 SET_BIT(EECR,EEWE);
 __enable_interrupt();
}

void delay_adc(uchar time_num);