uart.c

来自「利用凌阳单片机来测量温度」· C语言 代码 · 共 77 行

//========================================================
//	文件名称：	UART.c
//	功能描述：	通过UART实现串行通讯,将温度数据传到PC机
//	维护记录：	2005-11-22	v1.0
//========================================================

#include "SPCE061A.h"

//========================================================
//	语法格式：	void Init_Uart(void)
//	实现功能：	初始化串行口
//	参数：		无
//	返回值：	无
//========================================================

void Init_Uart(void)
{
	unsigned int uiDir;
	unsigned int uiAttrib;
	unsigned int uiData;
	
	uiDir = *P_IOB_Dir;				//初始化IOB7为输入口
	uiDir &= 0xff7f;
	*P_IOB_Dir = uiDir;
	
	uiAttrib = *P_IOB_Attrib;
	uiAttrib |= 0x0080;
	*P_IOB_Attrib = uiAttrib;
	
	uiData = *P_IOB_Data;
	uiData &= 0xff7f;
	*P_IOB_Data = uiData;
	
	uiDir = *P_IOB_Dir;				//初始化IOB10为输出口
	uiDir |= 0x0400;
	*P_IOB_Dir = uiDir;
	
	uiAttrib = *P_IOB_Attrib;
	uiAttrib |= 0x0400;
	*P_IOB_Attrib = uiAttrib;
	
	uiData = *P_IOB_Data;
	uiData &= 0xfbff;
	*P_IOB_Data = uiData;
	
	*P_UART_BaudScalarLow = 0x0000;		//设置波特率9600/
	*P_UART_BaudScalarHigh = 0x0005;
	
	*P_UART_Command1 = 0x0000;			//允许发送
	*P_UART_Command2 = 0x0040;
}

//========================================================
//	语法格式：	void Send_Data(unsigned int)
//	实现功能：	发送数据
//	参数：		需要发送达数据
//	返回值：	无
//========================================================

void Send_Data(unsigned int uiData_s)
{
	unsigned int uiHigh;				//高字节
	unsigned int uiLow;					//低字节
	
	uiHigh = uiData_s;
	uiLow = uiData_s;
	uiHigh = uiHigh >> 8;
	uiLow = uiLow & 0x00ff;

	*P_UART_Data = 0xaa;				//验证信号
	while((*P_UART_Command2 & 0x0040) == 0);
	*P_UART_Data = uiHigh;
	while((*P_UART_Command2 & 0x0040) == 0);
	*P_UART_Data = uiLow;
	while((*P_UART_Command2 & 0x0040) == 0);
	*P_UART_Data = 0x55;				//验证信号
}