/****************************************Copyright (c)**************************************************
**                               Guangzhou ZHIYUAN electronics Co.,LTD.
**                                     
**                                 http://www.embedtools.com
**
**--------------File Info-------------------------------------------------------------------------------
** File Name:          Uart0.c
** Last modified Date: 2006-11-18
** Last Version:       v1.0
** Description:        串口驅(qū)動(dòng)源文件
** 
**------------------------------------------------------------------------------------------------------
** Created By:         Zhou Shaogang
** Created date:       2006-11-18
** Version:            v1.0
** Descriptions:
**
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Description:
**
********************************************************************************************************/

#include "../config.h"
uint8 Uart0_Rec_Queue[UART0_REC_QUEUE_LEN];


/************************************************************************************
** Function name: Uart0Init
** Descriptions:  初始化Uart0 
** Input:         BaudRate: 波特率
**                Prio:     中斷優(yōu)先級
** Output:        TRUE :成功
**                FALSE:失敗
** Created by:    Zhou Shaogang
** Created Date:  2006-11-18
**----------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**----------------------------------------------------------------------------------
************************************************************************************/
uint8 Uart0Init(uint32 BaudRate, uint8 Prio)
{
  if(BaudRate>115200)                                        //波特率太高，錯(cuò)誤返回   
    return(FALSE);
  
  if (QueueCreate(Uart0_Rec_Queue,                           //初且化接收隊(duì)列失敗，錯(cuò)誤返回
                  UART0_REC_QUEUE_LEN,
                  0,
                  0)==NOT_OK)
  	return(FALSE);                                           
    
  SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);               //使能串口0外圍設(shè)備
  SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);               //使能GPIOA

  GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1); //設(shè)置PA0,PA1為RXD0,TXD0
  
  UARTConfigSet(UART0_BASE, BaudRate, (UART_CONFIG_WLEN_8 |  //配置串口0，8位數(shù)據(jù)，1位起始位，1位停止位，用戶波特率
                                       UART_CONFIG_STOP_ONE |
                                       UART_CONFIG_PAR_NONE) & 0xFFFFFFEF);

  UARTFifoLevelSet(UART0_BASE, 8, 8);
  IntEnable(INT_UART0);                                      //使能串口0系統(tǒng)中斷
  UARTIntEnable(UART0_BASE, UART_INT_RX | UART_INT_RT);      //使能串口0接收中斷和接收超時(shí)中斷
  IntPrioritySet(INT_UART0, Prio);                           //設(shè)置中斷優(yōu)先級     
  UARTEnable(UART0_BASE);                                
  
  return(TRUE);
}


/************************************************************************************
** Function name: Uart0Send
** Descriptions:  發(fā)送多個(gè)字節(jié)數(shù)據(jù)
** Input:         Buffer:發(fā)送數(shù)據(jù)存儲(chǔ)位置
**                NByte:發(fā)送數(shù)據(jù)個(gè)數(shù)
** Output:        無
** Created by:    Zhou Shaogang 
** Created Date:  2006-11-18
**----------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**----------------------------------------------------------------------------------
************************************************************************************/
void Uart0Send(uint8 *Buffer, uint16 NByte)
{
  while(NByte)
  {
    if( UARTSpaceAvail(UART0_BASE) )
    {
      UARTCharNonBlockingPut(UART0_BASE, *Buffer++);
      NByte--;
    }
  }

  while( !UARTTraFifoEmp(UART0_BASE) );
}


/*********************************************************************************************************
** 函數(shù)名稱: UART0_ISR
** 功能描述: 串口0中斷服務(wù)函數(shù)
** 輸　入:   無
** 輸　出:   無
** 全局變量: Uart0_Rec_Queue
** 調(diào)用模塊: QueueWrite
**
** 作　者: 周紹剛
** 日　期: 2006年10月12日
**-------------------------------------------------------------------------------------------------------
** 修改人: 
** 日　期: 
**-------------------------------------------------------------------------------------------------------
********************************************************************************************************/

/************************************************************************************
** Function name: UART0_ISR
** Descriptions:  串口0中斷服務(wù)函數(shù)
** Input:         無 
** Output:        無 
** Created by:    Zhou Shaogang 
** Created Date:  2006-11-18
**----------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**----------------------------------------------------------------------------------
************************************************************************************/
void UART0_ISR(void)
{
 
  unsigned long ulStatus;
   
  ulStatus = UARTIntStatus(UART0_BASE, true);   //讀取已使能的串口0中斷狀態(tài)
  UARTIntClear(UART0_BASE, ulStatus);           //清除當(dāng)前的串口0中斷

  if((ulStatus & UART_INT_RX) || (ulStatus & UART_INT_RT))               //接收中斷
  {
   while( UARTCharsAvail(UART0_BASE) )
   {
    QueueWrite(Uart0_Rec_Queue, (uint8)UARTCharNonBlockingGet(UART0_BASE));//FIFO中的數(shù)據(jù)入隊(duì)列
   }
  }
  
}