main.c

cs5532 spi 接口的程序

#include "all_inc.h"



void port_init(void)
{
// 输入/输出口初始化    DDRxn-方向配置 (1-输出 0-输入) PORTxn-上拉电阻配置 (1-上拉使能)
// Port A
//  7      6      5      4      3      2      1      0
//PORTA7 PORTA6 PORTA5 PORTA4 PORTA3 PORTA2 PORTA1 PORTA0
    PORTA = 0xff;
    DDRA = 0xff;
// Port B
//  7      6      5      4      3      2      1      0
//PORTB7 PORTB6 PORTB5 PORTB4 PORTB3 PORTB2 PORTB1 PORTB0
//                             MISO   MOSI   SCK    S\S
    PORTB = 0xff;
    DDRB = 0x97;
// Port C
//  7      6      5      4      3      2      1      0
//PORTC7 PORTC6 PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0
    PORTC = 0x7;
    DDRC = 0xf7;
// Port D
//  7      6      5      4      3      2      1      0
//PORTD7 PORTD6 PORTD5 PORTD4 PORTD3 PORTD2 PORTD1 PORTD0
    PORTD = 0x0;
    DDRD = 0xff;
// Port E
//  7      6      5      4      3      2      1      0
//PORTE7 PORTE6 PORTE5 PORTE4 PORTE3 PORTE2 PORTE1 PORTE0
    PORTE = 0xff;
    DDRE = 0xff;
// Port F
//  7      6      5      4      3      2      1      0
//PORTF7 PORTF6 PORTF5 PORTF4 PORTF3 PORTF2 PORTF1 PORTF0
    PORTF = 0x0;
    DDRF = 0x0;
// Port G
//  7     6     5     4      3      2      1      0
//  –    –    –  PORTG4 PORTG3 PORTG2 PORTG1 PORTG0
    PORTG = 0x1b;
    DDRG = 0x1b;
/*
// Port H
    DDRH = 0x00;
    PORTH = 0xff;
// Port I
    DDRI = 0x00;
    PORTI = 0xff;
// Port J
    DDRJ = 0x00;
    PORTJ = 0xff;
*/
}
//SPI initialize
// clock rate: 1382374hz   @11.0592 2x
void spi_init(void)
{
    SPCR = 0x51; //setup SPI
    SPSR = 0x01; //setup SPI
}
//call this routine to initialize all peripherals
void init_devices(void)
{
    //stop errant interrupts until set up
    __disable_interrupt(); //disable all interrupts
    XDIV  = 0x00; //xtal divider
    XMCRA = 0x00; //external memory
    port_init();
    spi_init();
    adc_init();

    MCUCR = 0x00;
    EICRA = 0x00; //extended ext ints
    EICRB = 0x00; //extended ext ints
    EIMSK = 0x00;
    TIMSK = 0x00; //timer interrupt sources
    ETIMSK = 0x00; //extended timer interrupt sources
    __enable_interrupt(); //re-enable interrupts
    //all peripherals are now initialized
}
//字符串拷贝
void StringCopy(char *from,unsigned char *to,unsigned char len)
{
    unsigned char i;

    for(i=0;i<len;i++)
    {
        to[i] = from[i];
    }
}
void Delay_ms(unsigned int ms)
{
    while(ms--)
    {
        __delay_cycles(3000);
    }
}
/*------------------主程序--------------------*/
signed long sum=0;
void main()
{

    
    
    init_devices();
    while(1)
    {
		sum = read_adc();
    }
}