STC说516兼容AT89C51RD2,我从ATMEL的官方网上下了个程序测试毫无反应
晶振设置稍有不同测试代码用的是11.0592,我的板子是18.432
问题在STC的单片机里有没有BDRCON这个寄存器，波特率不对也应该有乱玛呀
#include "reg_c51.h"
char uart_data;
/**
* FUNCTION_PURPOSE: This file set up uart in mode 1 (8 bits uart) with
* internal baud rate generator.
* FUNCTION_INPUTS: void
* FUNCTION_OUTPUTS: void
*/
void main (void)
{
SCON = 0x50; /* uart in mode 1 (8 bit), REN=1 */
BDRCON &=0xEC; /* BRR=0; SRC=0; */
BDRCON |=0x0C; /* TBCK=1;RBCK=1; SPD=0 */
BRL=0xF6; /* 9600 Bds at 11.059MHz */
ES = 1; /* Enable serial interrupt */
EA = 1; /* Enable global interrupt */
BDRCON |=0x10; /* Baud rate generator run*/
while(1); /* endless */
}
/**
* FUNCTION_PURPOSE: serial interrupt, echo received data.
* FUNCTION_INPUTS: P3.0(RXD) serial input
* FUNCTION_OUTPUTS: P3.1(TXD) serial output
*/
void serial_IT(void) interrupt 4
{
if (RI == 1)
{ /* if reception occur */
RI = 0; /* clear reception flag for next reception */
uart_data = SBUF; /* Read receive data */
SBUF = uart_data; /* Send back same data on uart*/
}
else TI = 0; /* if emission occur */
/* clear emission flag for next emission*/
}
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