busyuart1.c

pic33fj256gp710 uart

#include<uart.h>
#include<p30fxxxx.h>

/*************************************************************************
* Function Name     : BusyUART1                                          *
* Description       : This returns status whether the transmission       *
*                     is in progress or not, by checking Status bit TRMT *
* Parameters        : None                                               *
* Return Value      : char info whether transmission is in progress      *
*************************************************************************/

char BusyUART1(void)
{  
    return(!U1STAbits.TRMT);
}
/*********************************************************************
* Function Name     : CloseUART1                                     *
* Description       : This function disables the UART and clears the *
*                     Interrupt enable & flag bits                   *  
* Parameters        : None                                           *
* Return Value      : None                                           *  
*********************************************************************/

void CloseUART1(void)
{  
    U1MODEbits.UARTEN = 0;
	
    IEC0bits.U1RXIE = 0;
    IEC0bits.U1TXIE = 0;
	
    IFS0bits.U1RXIF = 0;
    IFS0bits.U1TXIF = 0;
}

/**********************************************************************
* Function Name     : ConfigIntUART1                                  *
* Description       : This function sets priority for RX,TX interrupt * 
*                     and enable/disables the interrupt               *
* Parameters        : unsigned int config enable/disable and priority *
* Return Value      : None                                            *  
**********************************************************************/

void ConfigIntUART1(unsigned int config)
{
    /* clear IF flags */
    IFS0bits.U1RXIF = 0;
    IFS0bits.U1TXIF = 0;

    /* set priority */
    IPC2bits.U1RXIP = 0x0007 & config;
    IPC2bits.U1TXIP = (0x0070 & config) >> 4;

    /* enable/disable interrupt */
    IEC0bits.U1RXIE = (0x0008 & config) >> 3;
    IEC0bits.U1TXIE = (0x0080 & config) >> 7;
}
/*********************************************************************
* Function Name     : OpenUART1                                      *
* Description       : This function configures the UART mode,        * 
*                     UART Interrupt modes and the Baud Rate         *
* Parameters        : unsigned int config1 operation setting         *
*                     unsigned int config2 TX & RX interrupt modes   *
*                     unsigned int ubrg baud rate setting            *
* Return Value      : None                                           *
*********************************************************************/

void OpenUART1(unsigned int config1,unsigned int config2, unsigned int ubrg)
{
    U1BRG  = ubrg;     /* baud rate */
    U1MODE = config1;  /* operation settings */
    U1STA = config2;   /* TX & RX interrupt modes */
}
void WriteUART1(unsigned int data)
{
    if(U1MODEbits.PDSEL == 3)
        U1TXREG = data;
    else
        U1TXREG = data & 0xFF;
}