[PIC] How to configure an UART to PIC16F18877

Code C - [expand]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
fosc = 20.000000
void UART_Init(void) 
{    
 
    RC1STAbits.SPEN = 0;     // begin of setup disable serial port.
    // transmitter
    TX1STAbits.TXEN     = 1;    // continues transmit enable bit
    TX1STAbits.TX9      = 0;    // 8 bit transmission
    TX1STAbits.SYNC = 0;        // asynchronous operation
    ANSELCbits.ANSC6    = 0;    // digital
    TRISCbits.TRISC6    = 0;    // output
 
    // receiver
    RC1STAbits.CREN    = 1;   // continues receive enable bit
    RC1STAbits.RX9     = 0;
    // there is only one sync
    ANSELCbits.ANSC7   = 0;   // digital
    TRISCbits.TRISC7   = 1;   // input
 
    // baudrate.
    TX1STAbits.BRGH    = 1;
    BAUD1CONbits.BRG16 = 1;
    SPBRG = 520;               // baudrate 9600
 
    RC1STAbits.SPEN   = 1;     // end of setup enable serial port
}
 
void UART_TxChar(uchar ch) 
{ 
     while(TXIF==0);    
     TXREG=ch;
}
 
uchar UART_RxChar()
{  
    uchar Discard;
    while(1){
        while(RCIF==0);       // Wait till the data is received 
        if (RCSTAbits.FERR)
        {    
            Discard = RCREG;   Read the register and wait for the next byte
            break;
        }    
        if (RCSTAbits.OERR)
        {    
            RCSTAbits.CREN = 0;
            break;
        }
        return RCREG;   // Return the received data 
    }
}