[Help] Receiving data from PC - EUSART

[VoltVolt]

Hi everyone,
I couldn't find out what's wrong with my codes.
What I want to do is just let my PIC receiving a character 'A' from VB6.0 software and set high on all the output ports...
So basically the char 'A' is to trigger the ports to turn on...
I'm not sure whether i write like that:
"RCREG1 == 'A'"
since RCREG is a 8-bit register, and it's function is to store receive data?
Compiler: MPLABX IDE
microcontroller: PIC18F45K22

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Code C - [expand]
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#include <htc.h>
 
/* Start of configuration fuses*/
#pragma config IESO=OFF, FOSC=INTIO67,PRICLKEN=OFF,FCMEN =OFF,PLLCFG=ON,BOREN=ON,BORV=250
#pragma config WDTEN=OFF
#pragma config P2BMX=PORTC0,CCP2MX=PORTC1,PBADEN=OFF,CCP3MX=PORTE0,MCLRE=INTMCLR,HFOFST=OFF,T3CMX=PORTC0
#pragma config DEBUG=OFF,STVREN=ON,XINST=OFF,LVP=OFF
#pragma config CP0=OFF,CP1=OFF,CP2=OFF,CP3=OFF
#pragma config CPB=OFF,CPD=OFF
#pragma config WRT0=ON,WRT1=ON,WRT2=ON,WRT3=ON
#pragma config WRTB=ON,WRTC=ON,WRTD=ON
 
/* end of configuration fuses */
initReceive() {
    OSCCON = 0b11110011; //16MHz internal oscillator
 
    //    Synchronous Master Reception Setup:
    // 1. Initialize the SPBRGHx, SPBRGx register pair for the appropriate
    //baud rate. Set or clear the BRGH and BRG16 bits, as required,
    //to achieve the desired baud rate.
    SPBRGH1 = 0X01;
    SPBRG1 = 0XA0;
    TXSTA1bits.BRGH = 1;
    BAUDCON1bits.BRG16 = 1;
 
    // 2. Set the RXx/DTx and TXx/CKx TRIS controls to ‘1’.
    TRISC = 0b11000000; //set TX1 and RX1 as input
 
    // 3. Enable the synchronous master serial port by setting bits SYNC,
    //SPEN and CSRC. Disable RXx / DTx and TXx / CKx output drivers
    //by setting the corresponding TRIS bits.
    ANSELB = 0; //disable Analog Select
    SYNC1 = 0; //asynchronous mode
    SPEN1 = 1; //enable EUSART
    CSRC1 = 1;
 
    // 4. If interrupts are desired, set the RCxIE interrupt enable
    //bit and set the GIE/GIEH and PEIE/GIEL bits of the INTCON register.
    // 5. If 9-bit reception is desired, set the RX9 bit.
    // 6. Set the DTRXP if inverted receive polarity is desired.
    //enable data to be transmited
    // 7. Enable reception by setting the CREN bit.
    CREN1 = 1;
 
    // 8. The RCxIF interrupt flag bit will be set when a character
    //is transferred from the RSR to the receive buffer. An interrupt
    //will be generated if the RCxIE interrupt enable bit was also set.
 
    // 9. Read the RCSTAx register to get the error flags and,
    //if 9-bit data reception is enabled, the ninth data bit.
 
    // 10. Get the received eight Least Significant data bits from
    //the receive buffer by reading the RCREGx register.
    //will be execute at main function
 
    // 11. If an overrun occurred, clear the OERR flag by clearing
    //the CREN receiver enable bit.
}
 
void main() {
    initReceive();
    while (1) {
        if (RCREG1 == 'A') {
            TRISA = 0;
            LATA = 0xFF;
        }
    }
}

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Thanks.....

 

[jayanth.devarayanadurga]

Your code is wrong. There is no interrupt service routine.

https://saeedsolutions.blogspot.in/2012/11/pic16f877-uart-code-proteus-simulation.html

Zip and post your vb.net and Hi-Tech C project files. mention the PIC used.