USART.rar_*.wsdt atmega88_atmega

#include <iom64.h> #include <intrinsics.h> #define F_CPU 8 //8MHz时钟频率 #define delay_us(t_nus) __delay_cycles(t_nus*F_CPU) #define delay_ms(t_nms) __delay_cycles(t_nms*F_CPU*1000) /*USART1多机模式中断方式接受数据*/ unsigned char me_address; unsigned char me_data; void uart1_init(void) //usart初始化 { UBRR1L=0x33; //波特率为9600bit/s UBRR1H=0x00; //U2X=0时BANDRATE的计算公式 //UBRRnL=(F_CPU/BAUDRATE/16-1)%256 //UBRRnH=(F_CPU/BAUDRATE/16-1)/256 UCSR1B=(1<<RXEN1)|(1<<TXEN1)|(1<<UCSZ12)|(1<<RXCIE1); //允许发送接收，使能接受中断 UCSR1C=(1<<UCSZ11)|(1<<UCSZ10); //九位数据+1位stop } unsigned char F_receivechar(void) { while(!(UCSR1A&(1<<RXC1))); return UDR1; } void F_485mpcm1(void) //多机模式设定 { UCSR1A|=(1<<MPCM1); UCSR1B|=(1<<RXCIE1); } void F_485mpcm0(void) //通信状态，清MPCM { UCSR1A&=~(1<<MPCM1); UCSR1B&=~(1<<RXCIE1); } #pragma vector=USART1_RXC_vect __interrupt void uart1_RXD(void) { unsigned char receive_address; receive_address=UDR0; if(receive_address==me_address) { F_485mpcm0(); me_data=F_receivechar(); F_485mpcm1(); } } /*字符处理函数*/ void put_c(unsigned char c) //字符输出 查询方式发送 { while(!(UCSR0A&(1<<UDRE0))); UDR0=c; } void put_str(char *pstr) { while(*pstr) { put_c(*pstr); pstr++; } put_c(0x0a); //换行 put_c(0x0d); } unsigned char get_c(void) //字符输入 { unsigned int i=0; while(!(UCSR0A&(1<<RXC0))) { if(i>500) //等待500ms 没有数据返回 break; delay_ms(1); i++; } return UDR0; } /*多机模式，从机中断接收，有地址、命令（接受发送）和应答主机功能*/ unsigned char addr; void uart10_init(void) //usart初始化 { UBRR1L=0x33; //波特率为9600bit/s UBRR1H=0x00; //U2X=0时BANDRATE的计算公式 //UBRRnL=(F_CPU/BAUDRATE/16-1)%256 //UBRRnH=(F_CPU/BAUDRATE/16-1)/256 UCSR1B=(1<<RXEN1)|(1<<TXEN1)|(1<<UCSZ12)|(1<<RXCIE1); //允许发送接收，使能接受中断 UCSR1C=(1<<UCSZ11)|(1<<UCSZ10); //九位数据+1位stop } void F_mpcm1(void) //多机模式设定 { UCSR1A|=(1<<MPCM1); UCSR1B|=(1<<RXCIE1); } void F_mpcm0(void) //通信状态，清MPCM { UCSR1A&=~(1<<MPCM1); UCSR1B&=~(1<<RXCIE1); } void function1(void) { ; } void function2(void) { ; } void function3(void) { ; } void function4(void) { ; } #pragma vector=USART0_RXC_vect __interrupt void uart0_RXD(void) { unsigned char uc_addr; unsigned char uc_cmd; unsigned char uc_cleck; unsigned char uc_count; UCSR0B&=0x7F; //清RXCIE0中断 uc_count=0; uc_addr=UDR0; //接收到本机地址 if(uc_addr==addr) { F_mpcm0(); put_c(addr); //回送本机地址 uc_cmd=get_c(); //接受命令 switch(uc_cmd) { case 0x01: //命令1 uc_count=0; function1(); //调用命令1函数 uc_cleck=get_c(); while((uc_cleck!=0x55)&&(uc_count<3)) { function1(); uc_cleck=get_c(); uc_count++; } break; case 0x02: uc_count=0; function2(); uc_cleck=get_c(); while((uc_cleck!=0x55)&&(uc_count<3)) { function2(); uc_cleck=get_c(); uc_count++; } break; case 0x03: uc_count=0; function3(); uc_cleck=get_c(); while((uc_cleck!=0x55)&&(uc_count<3)) { function3(); uc_cleck=get_c(); uc_count++; } break; case 0x04: uc_count=0; function4(); uc_cleck=get_c(); while((uc_cleck!=0x55)&&(uc_count<3)) { function4(); uc_cleck=get_c(); uc_count++; } break; default:break; } } else {;} F_mpcm1(); UCSR0B|=0x80; SREG|=0x80; } /*调用的CRC函数*/ const static unsigned int crc_tbl[256]={ 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, 0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, 0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, 0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, 0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485, 0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D, 0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4, 0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, 0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, 0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B, 0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12, 0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, 0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, 0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, 0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70, 0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78, 0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F, 0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067, 0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E, 0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, 0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D, 0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, 0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C, 0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634, 0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB, 0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3, 0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, 0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, 0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, 0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, 0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, 0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0 }; unsigned int getcrc(unsigned char *date,unsigned int len) { unsigned int crc; unsigned char temp; crc=0; while(len!=0) { temp=(crc/256); //8位二进制数暂存CRC的高8位 crc<<=8; //左移8位 /*高8位和当前字节相加后再查表求CRC，再加上以前的CRC*/ crc^=crc_tbl[temp^(*date)]; date++; len--; } return crc; } /*USART0查询发送中断接受*/ void uart0_init(void) //uart0初始化 { UBRR1L=0x33; //波特率为9600bit/s UBRR1H=0x00; UCSR0B=UCSR1B=(1<<RXEN1)|(1<<TXEN1)|(0<<UCSZ12)|(1<<RXCIE1); UCSR0C=(1<<UCSZ01)|(1<<UCSZ00);//8位数据1位stop } void main(void) { uart1_init(); F_485mpcm1(); SREG|=0x80; while(1); }