原创 PIC24F初始设置代码（Uart）

#define FCY      16000000
#define BAUDRATE 115200              
#define BRGVAL   ((FCY/BAUDRATE)/16)-1

void Uart1_Init()
{
 U1BRG = BRGVAL; //Set Baudrate
 U1STA = 0;
 U1MODE = 0;
 
 U1MODEBITS.BRGH = 1;
 U1MODEBITS.STSEL = 0;   // 1-stop bit
 U1MODEBITS.PDSEL = 0;   // No Parity, 8-data bits
 U1MODEBITS.ABAUD = 0;   // Autobaud Disabled
 
 U1STABITS.UTXISEL0 = 0;   // Interrupt after one Tx character is transmitted
 U1STABITS.UTXISEL1 = 0;                              
 U1STABITS.URXISEL  = 0;   // Interrupt after one RX character is received
 
 U1MODEBITS.UARTEN = 1;//Enable Uart1
 U1STABITS.UTXEN = 1; //Enable Transmit
 
 IEC0BITS.U1TXIE = 1; //Enable Transmit Interrupt
 IEC0BITS.U1RXIE = 1; //Enable Receive Interrupt

 IPC3BITS.U1TXIP = 0x01;  //Setup Uart1 TX interrupt for desired priority level
 IPC2BITS.U1RXIP = 0x01;  //Setup Uart1 RX interrupt for desired priority level

 IFS0BITS.U1RXIF = 0;//Clear the Recieve Interrupt Flag
 IFS0BITS.U1TXIF = 0;//Clear the Transmit Interrupt Flag

 IEC4BITS.U1ERIE = 0;  //Uart1 Interrupt error
}

/********************************************************************
* Function:  void PutChar(BYTE Char)
*
* Precondition: UART Setup
*
* Input:   Char - Character to transmit
*
* Output:   None
*
* Side Effects: Puts character into destination pointed to by ptrChar.
*
* Overview:  Transmits a character on UART1.
*     Waits for an empty spot in TXREG FIFO.
*
* Note:    None
********************************************************************/
void PutChar(char txChar)
{
 while(U1STAbits.UTXBF); //wait for FIFO space
 U1TXREG = txChar; //put character onto UART FIFO to transmit
}//end PutChar(char txChar)

/********************************************************************
* Function:        void GetChar(BYTE * ptrChar)
*
* PreCondition:    UART Setup
*
* Input:  ptrChar - pointer to character received
*
* Output:  
*
* Side Effects: Puts character into destination pointed to by ptrChar.
*    Clear WDT
*
* Overview:  Receives a character from UART1. 
*
* Note:   None
********************************************************************/
void GetChar(char *ptrChar)
{
 //get the data
 while(U1STAbits.URXDA);
  * ptrChar = UxRXREG;  //get data from UART RX FIFO
}//end GetChar(char *ptrChar)