SPI中断实现单片机之间的通信.doc

/*ATmega16&SPI中断实现主从的数据交换*FileName:master.cAuthor:沧海麒麟Date:2011.05.26Version :1.1Description:ATmega16单片机之间的简单的通信,利用中断的方法实现 主从机之间的各八位数据的交换。*/#include /常用头文件,如有需要可以查库文件include#include #include #include #pragma interrupt_handler spi_stc_isr:iv_SPI_STC /11#define uint unsigned int#define uchar unsigned char#define SS_1 (PORTB |= BIT(4)/PB4#define SS_0 (PORTB &= BIT(4)#define xtal 8uchar TXbuffer8 = 0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f;uchar RXbuffer8 = 0,0,0,0,0,0,0,0;uchar cnt = 0;uchar M_flag = 0;void Delay_1ms(void);void Delay_nms(uint n);void SPI_MasterPort_init(void);void SPI_MasterRegisters_init(void);/*/void main(void) uchar i=0; DDRA = 0xFF; SPI_MasterPort_init(); SPI_MasterRegisters_init(); CLI(); for(i=0;i8;i+) PORTA = TXbufferi; Delay_nms(500); SEI(); SS_0; SPDR = TXbuffer0; while (1) if (M_flag = 1) for(i=0;i8;i+) PORTA = RXbufferi; Delay_nms(500); / end of while/*void Delay_1ms(void) uint i;for (i=1;i(uint)(xtal*143-2);i+);/=void Delay_nms(uint n) uint i=0; while (in) Delay_1ms(); i+; /*=从机SPI引脚方向定义=*/void SPI_MasterPort_init(void)PORTB |= 0x50; /SS(PB4自定义)MOSI(PB5自定义)DDRB |= 0xB0; /MISO(PB6输入)SCK(PB7自定义)/=void SPI_MasterRegisters_init(void)/中断方式定义SPCR = (1 SPIE)|(1 SPE)|(1 MSTR)|(1 =7) cnt = 0; M_flag = 1; cnt+; SPDR = TXbuffercnt;/byte in SPDR has been sent/received/*ATmega16&SPI中断实现主从的数据交换*FileName:slave.cAuthor:沧海麒麟Date:2011.05.26Version :1.1Description:ATmega16单片机之间的简单的通信,利用中断的方法实现 主从机之间的各八位数据的交换。*/#include /常用头文件,如有需要可以查库文件include#include #include #include #pragma interrupt_handler spi_stc_isr:iv_SPI_STC /11#define uint unsigned int#define uchar unsigned char#define xtal 8uchar RXb8 = 0,0,0,0,0,0,0,0;uchar TXb8 = 0x7f,0xbf,0xef,0xf7,0xfb,0xdf,0xfd,0xfe;uchar S_flag=0;uchar cnt=0;void Delay_1ms(void);void Delay_nms(uint n);void SPI_SlavePort_init(void);void SPI_SlaveRegisters_init(void);/*/void main(void) uchar i; DDRA=0xFF; SPI_SlavePort_init(); SPI_SlaveRegisters_init(); SEI(); SPDR = TXb0; while(1) if(S_flag=1) for(i=0;i8;i+) PORTA = RXbi; Delay_nms(500); /end of if /end of while /*void Delay_1ms(void) uint i; for(i=1;i(uint)(xtal*143-2);i+) ;/=void Delay_nms(uint n) uint i=0; while(in) Delay_1ms(); i+; /*=从机SPI引脚方向定义=*/void SPI_SlavePort_init(void)PORTB |= 0xF0; /SS(PB4输入)MOSI(PB5输入)DDRB |= 0x00; /MISO(PB6自定义