STC11F04E單片機RS485串口通信源程序帶按鍵輸入,LED指示的開發板資料

ID:284341 · 發表于 2018-11-18 11:06

STC11F04E單片機精簡開發板串口通信按鍵輸入 485通信LED指示

主要芯片：STC11F04E單片機
工作電壓：直流5~15伏(電源選擇5V和大于5V兩種模式)
特點：
      1、具有電源指示；
      2、所有I/O口已引出；
      3、可以實現與電腦串口通信；
      4、可以實現雙串口通訊；（MAX232和MAX485雙串口通訊，MAX232也是下載程序口）

      5、具有上電復位和手動復位；
      6、電源防反接二極管；
      7、支持STC串口下載；
      8、雙串口通訊（注：下載程序只能使用MAX232口）；

9、四路路LED燈（可用上位機控制，）；

10、可端子接線供電、可排針引電；
11、7805供電，輸入電壓范圍寬

五、提供相關軟件、資料、原理圖

單片機RS485源程序如下:

/********************************************************************
匯誠科技
實現功能:此版配套測試程序
使用芯片：STC11F104E
晶振：11.0592MHZ
波特率：9600
編譯環境：Keil
作者：zhangxinchunleo
/********************************************************************
上電后，發送數據 STC10/11xx\r\nUart Test !\r\n
********************************************************************/
#include "reg51.h"
#include "intrins.h"
typedef unsigned char BYTE;
typedef unsigned int WORD;
#define FOSC 11059200L //System frequency
#define BAUD 9600 //UART baudrate
/*Define UART parity mode*/
#define NONE_PARITY 0 //None parity
#define ODD_PARITY 1 //Odd parity
#define EVEN_PARITY 2 //Even parity
#define MARK_PARITY 3 //Mark parity
#define SPACE_PARITY 4 //Space parity
#define PARITYBIT EVEN_PARITY //Testing even parity
sfr AUXR1 = 0xA2;
#define UART_P1 0x80 //(AUXR1.7) switch RXD/TXD from P3.0/P3.1 to P1.6/P1.7
sbit bit9 = P2^2; //P2.2 show UART data bit9
bit busy;
void SendData(BYTE dat);
void SendString(char *s);
void main()
{
AUXR1 |= UART_P1; //switch RXD/TXD from P3.0/P3.1 to P1.6/P1.7
#if (PARITYBIT == NONE_PARITY)
SCON = 0x50; //8-bit variable UART
#elif (PARITYBIT == ODD_PARITY) || (PARITYBIT == EVEN_PARITY) || (PARITYBIT == MARK_PARITY)
SCON = 0xda; //9-bit variable UART, parity bit initial to 1
#elif (PARITYBIT == SPACE_PARITY)
SCON = 0xd2; //9-bit variable UART, parity bit initial to 0
#endif
TMOD = 0x20; //Set Timer1 as 8-bit auto reload mode
TH1 = TL1 = -(FOSC/12/32/BAUD); //Set auto-reload vaule
TR1 = 1; //Timer1 start run
ES = 1; //Enable UART interrupt
EA = 1; //Open master interrupt switch
SendString("STC10/11xx\r\nUart Test !\r\n");
while(1);
}
/*----------------------------
UART interrupt service routine
----------------------------*/
void Uart_Isr() interrupt 4 using 1
{
if (RI)
{
RI = 0; //Clear receive interrupt flag
P0 = SBUF; //P0 show UART data
bit9 = RB8; //P2.2 show parity bit
}
if (TI)
{
TI = 0; //Clear transmit interrupt flag
busy = 0; //Clear transmit busy flag
}
}
/*----------------------------
Send a byte data to UART
Input: dat (data to be sent)
Output:None
----------------------------*/
void SendData(BYTE dat)
{
while (busy); //Wait for the completion of the previous data is sent
ACC = dat; //Calculate the even parity bit P (PSW.0)
if (P) //Set the parity bit according to P
{
#if (PARITYBIT == ODD_PARITY)
TB8 = 0; //Set parity bit to 0
#elif (PARITYBIT == EVEN_PARITY)
TB8 = 1; //Set parity bit to 1
#endif
}
else
{
#if (PARITYBIT == ODD_PARITY)
TB8 = 1; //Set parity bit to 1
#elif (PARITYBIT == EVEN_PARITY)
TB8 = 0; //Set parity bit to 0
#endif
}
busy = 1;
SBUF = ACC; //Send data to UART buffer
}
/*----------------------------
Send a string to UART
Input: s (address of string)
Output:None
----------------------------*/
void SendString(char *s)
{
while (*s) //Check the end of the string
{
SendData(*s++); //Send current char and increment string ptr
}
}
/********************************************************************
結束
*********************************************************************/