#include "uart4.h"
#include "../tpc/debug.h"

//#define FOSC 11059200L          //系统频率
//#define BAUD4 115200             //串口波特率
void L0_uart4_init(void)//115200bps@11.0592MHz
{
	#if(MainFre_11M == D_sys_MainFre)
#if 0
    S4CON = 0x50;               //8位可变波特率
    T4L = (65536 - (FOSC/4/BAUD4));   //设置波特率重装值
    T4H = (65536 - (FOSC/4/BAUD4))>>8;
    T4T3M |= 0x20;              //定时器4为1T模式
    T4T3M |= 0x80;              //定时器4开始计时
#else
	S4CON = 0x10;		//8位数据,可变波特率
	S4CON |= 0x40;		//串口4选择定时器4为波特率发生器
	T4T3M |= 0x20;		//定时器4时钟为Fosc,即1T
	T4L = 0xE8;		//设定定时初值
	T4H = 0xFF;		//设定定时初值
	T4T3M |= 0x80;		//启动定时器4
#endif
	
	
#elif (MainFre_22M == D_sys_MainFre)	
	#if (D_uart4_BRT == BRT_115200)
	S4CON = 0x10;		//8位数据,可变波特率
	S4CON |= 0x40;		//串口4选择定时器4为波特率发生器
	T4T3M |= 0x20;		//定时器时钟1T模式
	T4L = 0xD0;			//设置定时初始值
	T4H = 0xFF;			//设置定时初始值
	T4T3M |= 0x80;		//定时器4开始计时

	#elif (D_uart4_BRT == BRT_9600)	//9600bps@22.1184MHz
	S4CON = 0x10;		//8位数据,可变波特率
	S4CON |= 0x40;		//串口4选择定时器4为波特率发生器
	T4T3M |= 0x20;		//定时器时钟1T模式
	T4L = 0xC0;			//设置定时初始值
	T4H = 0xFD;			//设置定时初始值
	T4T3M |= 0x80;		//定时器4开始计时
	#endif
#endif
}

void L0_uart4_buf_init(void)
{						
	//定义发送缓冲区
	ts_uart[uNum4].s.buf = ts_send_buf.s4;
	ts_uart[uNum4].s.bufmax = D_send4_max;
	ts_uart[uNum4].s.max = ts_uart[uNum4].s.now = 0;
	ts_uart[uNum4].s.ok = D_ready;

	//定义接收缓冲区
	ts_uart[uNum4].r.buf = ts_recv_buf.r4;
	ts_uart[uNum4].r.bufmax = D_recv4_max;
	ts_uart[uNum4].r.head = 0;
	ts_uart[uNum4].r.ok = 0;
	ts_uart[uNum4].r.idle = 1;
	ts_uart[uNum4].r.overtime_t = 0;

	//串口协议解析专用字段
	ts_uart[uNum4].tp_handler = L0_uartN_overtime_callback;
	ts_uart[uNum4].uartx = uNum4;

	//串口初始化
	L0_uart4_init();

	//打开串口中断
	D_uart4_ES_INT(1); 
	
	//默认处于接收状态
	D_UART4_485_RX() 
}

/*************************************************
UART 中断
*************************************************/

#define D_SERVE_uart4   interrupt 18
void INTERRUPT_uart4(void)  D_SERVE_uart4// using 2
{
#if 1
	//NOP();	NOP();	NOP();
	if(L0_uart4_IntRI())					//如果是U0接收中断	
	{
		L0_uart4_IntRIClear(); 				//清除接收中断标志
		ts_uart[uNum4].r.reg = S4BUF;	//获取当前数据
		L0_uartN_s2b(uNum4);	//接收数据至缓冲区
	}
	if(L0_uart4_IntTI())					//如果是U0发送中断
	{
		L0_uart4_IntTIClear(); 				//清除发送中断标志
		if(ts_uart[uNum4].s.max != ts_uart[uNum4].s.now)
		{
			S4BUF  = ts_uart[uNum4].s.p[ts_uart[uNum4].s.now];
			ts_uart[uNum4].s.now ++;
		}
		else
		{
			ts_uart[uNum4].s.ok = D_ready;
			ts_uart[uNum4].s.max = 0;
			ts_uart[uNum4].s.now = 0;//可以发送下一个数据
			D_UART4_485_RX() //切换到接收状态
		}
	}
	//NOP();	NOP();	NOP();
#endif
}