uart1.c File Reference

#include "includes.h"

Go to the source code of this file.

Defines
#define	DIVIDER   ((int)(FOSC/(16UL * BAUD) -1))
Functions
void	Uart1Init (void)
void	Uart1BufferReset (void)
INT8U	Uart1RxBufferCheck (void)
INT8U	Uart1RxBufferCheckIsr (void)
void	Uart1RxBufferPut (INT8U Data)
void	Uart1RxBufferPutIsr (INT8U Data)
INT8U	Uart1RxBufferGet (void)
INT8U	Uart1TxBufferCheckIsr (void)
INT8U	Uart1TxBufferCheck (void)
void	Uart1TxBufferPut (INT8U Data)
INT8U	Uart1TxBufferGet (void)
INT8U	Uart1TxBufferGetIsr (void)
void	Uart1CharTx (char Data)
char	Uart1CharGet (void)
void	Uart1StringTx (const char *pString)
void	Uart1RxIsr (void)
void	Uart1TxIsr (void)
void	Uart1Svc (void)
Variables
INT8U	UartRxData
UART1_CONTROL	Uart1Ctrl

---

Define Documentation

#define DIVIDER   ((int)(FOSC/(16UL * BAUD) -1))

Definition at line 13 of file uart1.c.

---

Function Documentation

void Uart1BufferReset

(

void

)

Definition at line 45 of file uart1.c.

                           {
    Uart1Ctrl.TxBuffer.Get=0;
    Uart1Ctrl.TxBuffer.Put=0;
    Uart1Ctrl.RxBuffer.Get=0;
    Uart1Ctrl.RxBuffer.Put=0;
}

char Uart1CharGet

(

void

)

Definition at line 184 of file uart1.c.

                       {
    while(RC1IF==0); //wait eusart rx buffer full
    return RCREG1;  
}

void Uart1CharTx

(

char

Data

)

Definition at line 179 of file uart1.c.

                           {
    while(Uart1TxBufferCheck()==BUFFER_FULL) Uart1Svc();
    Uart1TxBufferPut(Data);
    Uart1Svc();
}

void Uart1Init

(

void

)

Definition at line 17 of file uart1.c.

                    {
               //set tx,rx pin function
    TRISC6=0;  // TRISC6 is uart 1 tx pin...set output
    TRISC7=1;  // TRISC7 is uart 1 rx pin...set input
    // uart works with hs
    //SPBRG=((int)(FOSC/(16UL * BAUD) -1));
    BAUDCON1=0x08;             // brg16=1...use 16 bit baudrate generator
    SPBRGH1=UART1_SPBREG1_HB;       // baudrate generator high byte 
    SPBRG1=UART1_SPBREG1_LB ;       // baudrate generator low byte
    TXSTA1=0x24;               // TX enable & BRGH=1 & SYNC=0
    RCSTA1=0x90;               // Serial port enabled & RX enable

    #if(USART1_ISR_EN==1)
        RC1IF=0; // clear uart1 rx interrupt flag 
        TX1IF=0; // clear uart1 tx interrupt flag
        RC1IP=0; // set uart1 rx priority low
        TX1IP=0; // set uart1 tx priority low
        RC1IE=1; // enable uart rx interrupt
        TX1IE=0; // disable uart tx interrupt
    #endif

    Uart1Ctrl.TxBuffer.Get=0;
    Uart1Ctrl.TxBuffer.Put=0;
    Uart1Ctrl.RxBuffer.Get=0;
    Uart1Ctrl.RxBuffer.Put=0;
    Uart1Ctrl.UartTxTransmit=FALSE;
}

INT8U Uart1RxBufferCheck

(

void

)

Definition at line 52 of file uart1.c.

                              {
    if(Uart1Ctrl.RxBuffer.Put!=Uart1Ctrl.RxBuffer.Get){
        if(Uart1Ctrl.RxBuffer.Put==(UART1_MAX_BUFFER_SIZE-1)){
            if(Uart1Ctrl.RxBuffer.Get==0) return BUFFER_FULL;
            else return BUFFER_NOT_EMPTY;
        }
        else{
            if((Uart1Ctrl.RxBuffer.Put+1)==Uart1Ctrl.RxBuffer.Get) return BUFFER_FULL;
            else return BUFFER_NOT_EMPTY;
        }
    }
    else return BUFFER_EMPTY;
}

INT8U Uart1RxBufferCheckIsr

(

void

)

Definition at line 65 of file uart1.c.

                                 {
    if(Uart1Ctrl.RxBuffer.Put!=Uart1Ctrl.RxBuffer.Get){
        if(Uart1Ctrl.RxBuffer.Put==(UART1_MAX_BUFFER_SIZE-1)){
            if(Uart1Ctrl.RxBuffer.Get==0) return BUFFER_FULL;
            else return BUFFER_NOT_EMPTY;
        }
        else{
            if((Uart1Ctrl.RxBuffer.Put+1)==Uart1Ctrl.RxBuffer.Get) return BUFFER_FULL;
            else return BUFFER_NOT_EMPTY;
        }
    }
    else return BUFFER_EMPTY;
}

INT8U Uart1RxBufferGet

(

void

)

Definition at line 100 of file uart1.c.

                            {
    INT8U Data;

    if(Uart1RxBufferCheck()==BUFFER_EMPTY) return 0;
    if(Uart1Ctrl.RxBuffer.Get==(UART1_MAX_BUFFER_SIZE-1)){
        Data=Uart1Ctrl.RxBuffer.Data[Uart1Ctrl.RxBuffer.Get];
        Uart1Ctrl.RxBuffer.Get=0;
    }
    else{
        Data=Uart1Ctrl.RxBuffer.Data[Uart1Ctrl.RxBuffer.Get];
        Uart1Ctrl.RxBuffer.Get++;
    }
    return Data;
}

void Uart1RxBufferPut

(

INT8U

Data

)

Definition at line 78 of file uart1.c.

                                 {
    if(Uart1RxBufferCheck()==BUFFER_FULL) return;
    if(Uart1Ctrl.RxBuffer.Put==(UART1_MAX_BUFFER_SIZE-1)){
        Uart1Ctrl.RxBuffer.Data[Uart1Ctrl.RxBuffer.Put]=Data;
        Uart1Ctrl.RxBuffer.Put=0;
    }
    else{
        Uart1Ctrl.RxBuffer.Data[Uart1Ctrl.RxBuffer.Put]=Data;
        Uart1Ctrl.RxBuffer.Put++;
    }
}

void Uart1RxBufferPutIsr

(

INT8U

Data

)

Definition at line 89 of file uart1.c.

                                    {
    if(Uart1RxBufferCheckIsr()==BUFFER_FULL) return;
    if(Uart1Ctrl.RxBuffer.Put==(UART1_MAX_BUFFER_SIZE-1)){
        Uart1Ctrl.RxBuffer.Data[Uart1Ctrl.RxBuffer.Put]=Data;
        Uart1Ctrl.RxBuffer.Put=0;
    }
    else{
        Uart1Ctrl.RxBuffer.Data[Uart1Ctrl.RxBuffer.Put]=Data;
        Uart1Ctrl.RxBuffer.Put++;
    }
}

void Uart1RxIsr

(

void

)

Definition at line 194 of file uart1.c.

                     {
    Uart1RxBufferPutIsr(RCREG1);
}

void Uart1StringTx

(

const char *

pString

)

Definition at line 188 of file uart1.c.

                                       {
    while(*pString!=0){ 
        Uart1CharTx(*pString);
        pString++;
    }
}

void Uart1Svc

(

void

)

Definition at line 206 of file uart1.c.

                   {
    if(Uart1Ctrl.UartTxTransmit==TRUE) return;
    if(Uart1TxBufferCheck()==BUFFER_EMPTY) return;
    Uart1Ctrl.UartTxTransmit=TRUE;
    TX1IE=1;  // enable uart tx interrupt
              // pic generate interrupt automatically
              // data is assigned and transmited in ISR
}

INT8U Uart1TxBufferCheck

(

void

)

Definition at line 127 of file uart1.c.

                              {
    if(Uart1Ctrl.TxBuffer.Put!=Uart1Ctrl.TxBuffer.Get){
        if(Uart1Ctrl.TxBuffer.Put==(UART1_MAX_BUFFER_SIZE-1)){
            if(Uart1Ctrl.TxBuffer.Get==0) return BUFFER_FULL;
            else return BUFFER_NOT_EMPTY;
        }
        else{
            if((Uart1Ctrl.TxBuffer.Put+1)==Uart1Ctrl.TxBuffer.Get) return BUFFER_FULL;
            else return BUFFER_NOT_EMPTY;
        }
    }
    else return BUFFER_EMPTY;
}

INT8U Uart1TxBufferCheckIsr

(

void

)

Definition at line 114 of file uart1.c.

                                 {
    if(Uart1Ctrl.TxBuffer.Put!=Uart1Ctrl.TxBuffer.Get){
        if(Uart1Ctrl.TxBuffer.Put==(UART1_MAX_BUFFER_SIZE-1)){
            if(Uart1Ctrl.TxBuffer.Get==0) return BUFFER_FULL;
            else return BUFFER_NOT_EMPTY;
        }
        else{
            if((Uart1Ctrl.TxBuffer.Put+1)==Uart1Ctrl.TxBuffer.Get) return BUFFER_FULL;
            else return BUFFER_NOT_EMPTY;
        }
    }
    else return BUFFER_EMPTY;
}

INT8U Uart1TxBufferGet

(

void

)

Definition at line 151 of file uart1.c.

                            {
    INT8U Data;

    if(Uart1TxBufferCheck()==BUFFER_EMPTY) return 0;
    if(Uart1Ctrl.TxBuffer.Get==(UART1_MAX_BUFFER_SIZE-1)){
        Data=Uart1Ctrl.TxBuffer.Data[Uart1Ctrl.TxBuffer.Get];
        Uart1Ctrl.TxBuffer.Get=0;
    }
    else{
        Data=Uart1Ctrl.TxBuffer.Data[Uart1Ctrl.TxBuffer.Get];
        Uart1Ctrl.TxBuffer.Get++;
    }
    return Data;
}

INT8U Uart1TxBufferGetIsr

(

void

)

Definition at line 165 of file uart1.c.

                               {
    INT8U Data;

    if(Uart1TxBufferCheckIsr()==BUFFER_EMPTY) return 0;
    if(Uart1Ctrl.TxBuffer.Get==(UART1_MAX_BUFFER_SIZE-1)){
        Data=Uart1Ctrl.TxBuffer.Data[Uart1Ctrl.TxBuffer.Get];
        Uart1Ctrl.TxBuffer.Get=0;
    }
    else{
        Data=Uart1Ctrl.TxBuffer.Data[Uart1Ctrl.TxBuffer.Get];
        Uart1Ctrl.TxBuffer.Get++;
    }
    return Data;
}

void Uart1TxBufferPut

(

INT8U

Data

)

Definition at line 140 of file uart1.c.

                                 {
    if(Uart1TxBufferCheck()==BUFFER_FULL) return;
    if(Uart1Ctrl.TxBuffer.Put==(UART1_MAX_BUFFER_SIZE-1)){
        Uart1Ctrl.TxBuffer.Data[Uart1Ctrl.TxBuffer.Put]=Data;
        Uart1Ctrl.TxBuffer.Put=0;
    }
    else{
        Uart1Ctrl.TxBuffer.Data[Uart1Ctrl.TxBuffer.Put]=Data;
        Uart1Ctrl.TxBuffer.Put++;
    }
}

void Uart1TxIsr

(

void

)

Definition at line 197 of file uart1.c.

                     {   
    if(Uart1TxBufferCheckIsr()==BUFFER_EMPTY){
        Uart1Ctrl.UartTxTransmit=FALSE;
        TX1IE=0; // disable uart tx interrupt as last byte finished.
    }
    else{
        TXREG1=Uart1TxBufferGetIsr();
    }
}

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Variable Documentation

UART1_CONTROL Uart1Ctrl

Definition at line 15 of file uart1.c.

INT8U UartRxData

Definition at line 14 of file uart1.c.