C8051F310初始化.rar

//内部晶振24。5M，波特率为9600 //TH1=0x6A; //CKCON=XXXX0X00; void SYSCLK_Init (void) { OSCICN |= 0x03; // Configure internal oscillator for // its maximum frequency RSTSRC = 0x04; // Enable missing clock detector } //----------------------------------------------------------------------------- // 串口初始化 //----------------------------------------------------------------------------- // // Configure the UART0 using Timer1, for <BAUDRATE> and 8-N-1. // void UART0_Init (void) { SCON0 = 0x10; // SCON0: 8-bit variable bit rate / // level of STOP bit is ignored // RX enabled // ninth bits are zeros // clear RI0 and TI0 bits if (SYSCLK/BAUDRATE/2/256 < 1) { TH1 = -(SYSCLK/BAUDRATE/2); CKCON &= ~0x0B; // T1M = 1; SCA1:0 = xx CKCON |= 0x08; } else if (SYSCLK/BAUDRATE/2/256 < 4) { TH1 = -(SYSCLK/BAUDRATE/2/4); CKCON &= ~0x0B; // T1M = 0; SCA1:0 = 01 CKCON |= 0x09; } else if (SYSCLK/BAUDRATE/2/256 < 12) { TH1 = -(SYSCLK/BAUDRATE/2/12); CKCON &= ~0x0B; // T1M = 0; SCA1:0 = 00 } else { TH1 = -(SYSCLK/BAUDRATE/2/48); CKCON &= ~0x0B; // T1M = 0; SCA1:0 = 10 CKCON |= 0x02; } TL1 = TH1; // init Timer1 TMOD &= ~0xf0; // TMOD: timer 1 in 8-bit autoreload TMOD |= 0x20; TR1 = 1; // START Timer1 TI0 = 1; // Indicate TX0 ready }