at89c52串口

void UART_Init() //初始化uart
{
SCON=0x50;
RCAP2H = (65536 - (3456 / 96)) / 256;
RCAP2L = (65536 - (3456 / 96)) % 256;
T2CON = 0x34;
TI = 1;
}

直接用printf

加入#include <stdio.h>
#include <intrins.h>