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#include <STC8G.h>
#include <intrins.h>
#include <stdio.h>
typedef unsigned char u8;
typedef unsigned int u16;
typedef unsigned long u32;
#define Baudrate1 115200L
#define UART1_BUF_LENGTH 32
u8 TX1_Cnt; //發送計數
u8 RX1_Cnt; //接收計數
bit B_TX1_Busy; //發送忙標志
u8 idata RX1_Buffer[UART1_BUF_LENGTH]; //接收緩沖
void PrintString1(u8 *puts);
void PrintChar(u8 dat);
#define SYSCLK 24000000
#define BAUD 115200 //22.1184M下，99.2-115.2均可驅動舵機。
#define BRT (65536 - SYSCLK / BAUD / 4)
//端口定義
sbit CH1in = P3^2;
sbit CH2in = P3^3;
sbit CH3in = P5^4;
sbit CH4in = P5^5;
//常量定義
unsigned char S_data1[] = {0x00,0xFF,0xFA,0x05,0x03,0x1A,0x00,0x02,0xD9};
unsigned char S_data2[] = {0x01,0xFF,0xFB,0x05,0x03,0x04,0x00,0x00,0xDB};
u16 Scount=0;
u8 k;
void TM0_Isr() interrupt 1 //定時器0中斷函數
{
Scount++;
if(Scount==20000){ //20ms 串口輸出一次
PrintString1(S_data1);
Scount=0;
}
}
void Timer0Init(void) //10微秒@24.000MHz
{
AUXR |= 0x80; //定時器時鐘1T模式
TMOD &= 0xF0; //設置定時器模式
//TL0 = 0x10; //設置定時初值 10微妙
//TL0 = 0xD0; //設置定時初值 2微妙
//TL0 = 0xE8; //設置定時初值 1微妙
TL0 = 0xE8;
TH0 = 0xFF; //設置定時初值
TF0 = 0; //清除TF0標志
TR0 = 1; //定時器0開始計時
ET0 = 1; //使能定時器0中斷
EA = 1; //打開總中斷
PT0 = 1; //高優先級中斷
}
void Delay1000ms() //@24.000MHz //軟件延時1000ms
{
unsigned char i, j, k;
_nop_();
_nop_();
i = 92;
j = 50;
k = 238;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}
void Delay20ms() //@24.000MHz
{
unsigned char i, j, k;
_nop_();
_nop_();
i = 2;
j = 211;
k = 231;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}
void UartInit(void) //115200bps@24.000MHz
{
SCON = 0x50; //8位數據,可變波特率
AUXR |= 0x40; //定時器1時鐘為Fosc,即1T
AUXR &= 0xFE; //串口1選擇定時器1為波特率發生器
TMOD &= 0x0F; //設定定時器1為16位自動重裝方式
TL1 = 0xCC; //設定定時初值 115200
TH1 = 0xFF; //設定定時初值
//TL1 = 0x8F; //設定定時初值 9600
//TH1 = 0xFD; //設定定時初值
ET1 = 0; //禁止定時器1中斷
TR1 = 1; //啟動定時器1
ES = 1; //是能串口1中斷
EA = 1; //使能總中斷
PS = 2; //高優先級中斷
B_TX1_Busy = 0;
TX1_Cnt = 0;
RX1_Cnt = 0;
}
void UART1_int (void) interrupt 4
{
if(RI)
{
RI = 0;
RX1_Buffer[RX1_Cnt] = SBUF;
if(++RX1_Cnt >= UART1_BUF_LENGTH) RX1_Cnt = 0; //防溢出
}
if(TI)
{
TI = 0;
B_TX1_Busy = 0;
}
}
void PrintChar(u8 dat) //發送字符
{
SBUF = dat;
B_TX1_Busy = 1;
while(B_TX1_Busy);
}
void PrintString1(u8 *puts) //發送一個字符串
{
unsigned char i;
for (i=0;i<9;i++)
{
SBUF = puts[i];
B_TX1_Busy = 1;
while(B_TX1_Busy);
}
}
void main(void)
{
P5M1 = 0;
P5M0 = 0; //P5 標準輸出口
P3M1 = 0;
P3M0 = 0; //P3 標準輸出口
UartInit(); //初始化串口
Timer0Init();//初始化定時器
// EX1init(); //初始化外部中斷
while(1)//主循環
{
// PrintString1(S_data1);
// Delay20ms();
}
}

復制代碼

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