k_line.c

来自「AVR开发板 C实现 液晶 can总线控制及其他外围电路源代码」· C语言 代码 · 共 47 行

#include "K_Line.h"

void K_Line_Init(void)
{
	UBRR0H = 0;
	UBRR0L = 95;		//10.4K
	UCSR0B |=_BV(RXCIE0)|_BV(TXCIE0)|_BV(RXEN0) |_BV(TXEN0);
	UCSR0A |=_BV(U2X0);	
}

void Putc(uchar c)
{
	while((UCSR0A & (1<<UDRE0)))
	;
		UDR0 = c;
}
uchar Getc(void)
{
	while(!(UCSR0A&(1<<RXC0)));
	return UDR0;
}

//是否接受完成
uchar IsRecvComplete(void)
{
	return g_bRxdLen == 0;
}

// 从发送缓冲区发送指定长度数据
void SendToUart(uchar size)
{
	g_bTxdPos = 0;
	g_bTxdLen = size;
	UDR0 = g_aSendBuf[0];
	while(g_bTxdLen>0);
}

//接受指定长度数据到数据缓冲区
void RecvFromUart(uchar size,uchar bwait)
{
	g_bRxdPos = 0;
	g_bRxdLen = size;
	if(bwait)
		while(g_bRxdLen > 0);
	g_bRxdPos = 0;
}