/****************************************Copyright (c)**************************************************
**--------------File Info-------------------------------------------------------------------------------
** File name: uart0.C
** Last modified Date:2007-12-20
** Last Version: 1.0
** Descriptions: 基于LPC2100、LPC2200系列ARM7微控制器的UART0
**------------------------------------------------------------------------------------------------------
** Created by:   Rein Lee
** Created date: 2007-12-20
** Version:      1.0
** Descriptions: The original version
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Descriptions:
********************************************************************************************************/
#include "config.h"
static OS_EVENT *Uart0Sem;
/*********************************************************************************************************
** 函數名稱: UART0Init
** 功能描述: 串口初始化
** 輸　入: bps 波特率
** 輸　出: 無       
** 全局變量: 無
** 調用模塊: 無
**------------------------------------------------------------------------------------------------------
** Created by    Rein Lee
** Created date: 2007-12-20
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void  UART0Init(uint32 bps)
{
	uint16 Fdiv;
	PINSEL0 = (PINSEL0 & (~0x0000000f)) | 0x05;	// 不影響其它管腳連接,設置I/O連接到I2C
	U0LCR = 0x83;                                   // 允許訪問分頻因子寄存器 
	Fdiv = (Fpclk / 16) / bps;                 // 設置波特率 
	U0DLM = Fdiv / 256;							
	U0DLL = Fdiv % 256;						
	U0LCR = 0x03;                                    // 禁止訪問分頻因子寄存器// 且設置為8,1,n  
	U0IER = 0x09; 					//允許接收中斷和modem中斷
	U0FCR = 0x07;   				// FIFO控制,無FIFO
	Uart0Sem = OSSemCreate(0);
}
/*********************************************************************************************************
** 函數名稱: UartSendString
** 功能描述: 通過串口發送數據
** 輸　入: Data 待發送數據指針
** 輸　出: 無       
** 全局變量: 無
** 調用模塊: 無
**------------------------------------------------------------------------------------------------------
** Created by    Rein Lee
** Created date: 2007-12-20
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
uint8  UartSendString(char *Data)
{
    while(1)
    {  
        if( *Data == '\0' ) break;
        U0THR = *Data++;						// 發送數據		    	
    	while( (U0LSR&0x20)==0 );	    	// 等待數據發送完畢
    }
    return(0);
} 
/*********************************************************************************************************
** 函數名稱: UartSendChar
** 功能描述: 通過串口發送數據
** 輸　入: Data 待發送數據指針
** 輸　出: 無       
** 全局變量: 無
** 調用模塊: 無
**------------------------------------------------------------------------------------------------------
** Created by    Rein Lee
** Created date: 2007-12-20
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
uint8  UartSendChar(char Data)
{
    U0THR = Data;						// 發送數據		    	
    while( (U0LSR&0x20)==0 );	    	// 等待數據發送完畢
    return(0);
} 
/*********************************************************************************************************
** 函數名稱: UART0Getch
** 功能描述: 從UART0接受一個字節
** 輸　入: 無
** 輸　出: 接收到的數據      
** 全局變量: 無
** 調用模塊: 無
**------------------------------------------------------------------------------------------------------
** Created by    Rein Lee
** Created date: 2007-12-20
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
uint8 UART0Getch(void)
{
    uint8 err;
    OS_ENTER_CRITICAL();
    while ((U0LSR & 0x00000001) == 0)
    {                                           /* 沒有收到數據 */
        U0IER = U0IER | 0x01;                   /* 允許接收中斷 */
        OSSemPend(Uart0Sem, 0, &err);           /* 等待接收數據 */
    }
    err = U0RBR;                                /* 讀取收到的數據 */
    OS_EXIT_CRITICAL();
    return err;
} 
/*********************************************************************************************************
** 函數名稱: GetAllChar
** 功能描述: 從串口接受一幀數據
** 輸　入: 無
** 輸　出: 無       
** 全局變量: Frame_Received index
** 調用模塊: UART0Getch（）
**------------------------------------------------------------------------------------------------------
** Created by    Rein Lee
** Created date: 2007-12-20
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void GetAllChar()
{

}
/*********************************************************************************************************
** 函數名稱: UART0_Exception
** 功能描述: 串口中斷函數
** 輸　入: 無
** 輸　出: 無       
** 全局變量: 無
** 調用模塊: 無
**------------------------------------------------------------------------------------------------------
** Created by    Rein Lee
** Created date: 2007-12-20
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void UART0_Exception(void)
{
    uint8 IIR, temp;
    OS_ENTER_CRITICAL();
    while(((IIR=U0IIR) & 0x01) == 0)
   {                                                // 有中斷未處理完
        switch (IIR & 0x0f)
        {                
            case 0x04:                                  // 接收數據可用
                OSSemPost(Uart0Sem);                    /* 通知接收任務 */
                U0IER &= (~0x01);                       // 禁止接收及字符超時中斷
                break;
                     
            case 0x06:                                  // 接收線狀態
                temp = U0LSR;
                break;
                
            case 0x0c:                                  // 字符超時指示
                OSSemPost(Uart0Sem);                    /* 通知接收任務 */
                U0IER &= (~0x01);                       // 禁止接收及字符超時中斷
                break;
                
            default:
                break;
        }
    } 
    VICVectAddr = 0;      		// 通知中斷控制器中斷結束
    OS_EXIT_CRITICAL();
}
/*********************************************************************************************************
**                            End Of File
********************************************************************************************************/