[PIC] PIC18f45k22 UART problem

[AshleeMakaya]

hi am having problems with uart communication. am trying to send a simple text "Start" to the virtual terminal but it outputs gabbage.

i am using proteus and mikroc
i am using pic18f45k22

char uart_rd;

void main() {
  ANSELC = 0;                     // Configure PORTC pins as digital

  UART1_Init(9600);               // Initialize UART module at 9600 bps
  Delay_ms(100);                  // Wait for UART module to stabilize

  UART1_Write_Text("Start");
  UART1_Write(13);
  UART1_Write(10);

  while (1) {                     // Endless loop
    if (UART1_Data_Ready()) {     // If data is received,
      uart_rd = UART1_Read();     // read the received data,
      UART1_Write(uart_rd);       // and send data via UART
    }
  }
}

 

[KlausST]

Hi,

Read through some forum posts about UART problems. In 99% it's a baudrate mismatch problem or a signal driver problem.

The UART init tells to "try" to set to 9600 baud....but no one can tell if it really "can". Because it depends on real microcontroller clock frequency and correct compiler setup.

If you are sure the baudrate is correct, then the problem may be a hardware problem.
--> show the complete circuit from microcontroller to receiver.

(Currently I'm limited to use my cellular phone, thus I can't open your attachments. Adding inline text and pictures is more compatible. Don't forget to use formatting tags)

Klaus