main.c

mega16 spi主从通信 测试通过（ICC）

#include "iom16v.h"
#include "macros.h"
#define uchar unsigned char
#define uint  unsigned int
//串口波特率9600
/*void uart0_init(void)
{
 UCSRB = 0x00; //disable while setting baud rate
 UCSRA = 0x00;
 UCSRC = BIT(URSEL) | 0x06;
 UBRRL = 0x0C; //set baud rate lo
 UBRRH = 0x00; //set baud rate hi
 UCSRB = 0x98;
}*//*
void uart0_init(void)
{
 UCSRB = 0x00; //disable while setting baud rate
 UCSRA = 0x00;
 UCSRC = 0x0B;//
 UBRRL = 0x2F; //set baud rate lo
 UBRRH = 0x00; //set baud rate hi  fosc=7372800HZ,Baud=115200
 UCSRB = (1<<RXCIE)|(1<<TXCIE)|(1<<RXEN)|(1<<TXEN);//0xD8;//发送接受使能 中断使能
}
uchar RecvFlag = 0;
uchar RecvData = 0;

#pragma interrupt_handler uart0_rx_isr:12
void uart0_rx_isr(void)
{
 RecvFlag = 1;
 RecvData = UDR;
 while(!(UCSRA&0x20));
 UDR = RecvData;
}*/
#define DDR_MISO  6
#define DDR_MOSI  5
#define DDR_SCK   7
#define DDR_SS    4
#define DDR_SPI   DDRB
#define PORT_SPI  PORTB
/*-----------------------------------------------------------------
函数名称: void SPIMasterInit(void)
函数功能: SPI主机初始化
参    数: 
返 回 值: 无
-----------------------------------------------------------------*/
void SPIMasterInit(void)
{
    DDR_SPI |= (1<<DDR_SCK)|(1<<DDR_MOSI);//输出
    DDR_SPI &=~(1<<DDR_MISO);//输入
    SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR1)|(1<<SPR0);//|(1<<CPOL)|(1<<CPHA)
}
/*-----------------------------------------------------------------
函数名称: void SPIMasterTransmit(unsigned char i) 
函数功能: SPI数据发送
参    数: 
返 回 值: 无
-----------------------------------------------------------------*/
void SPIMasterTransmit(uchar TranData) 
{ 
  SPDR = TranData;     // 启动数据传输 
  while (!(SPSR & (1<<SPIF)));  // 等待传输结束 
}
void DeviceInit(void)
{
 CLI();
 //uart0_init();
 SPIMasterInit();
 
 MCUCR = 0;
 TIMSK = 0;
 GICR  = 0;
 SEI();
}
void delay(int num )
{
  while(num--);
}
void main(void)
{
 PORT_SPI &=~(1<<DDR_SS);
 DDR_SPI |= (1<<DDR_SS); 
 DeviceInit();
 
 SPIMasterTransmit(0x05);
 
  SPIMasterTransmit(0x32);
 while(1)
 {
 
 
   
 
   /*if(RecvFlag)
  {
   RecvFlag = 0;
   SPIMasterTransmit(RecvData);
  }*/
 }
}