[SOLVED] Mikro C Software UART at 3.3V internal oscillator 8mhz

[lockman_akim]

Hi,

I have a problem with my software uart, i dont receive any data at my computer after transmitting via soft uart. is that the problem cause by the unstable internal oscillator? here my code written using mikro c.

char input[4];
char celcius[4];
char error,byte_read;
unsigned int raw_celcius;
int ad_val;
float ph;
char some_byte = 0x31;

void main()
{
    UART1_Init(38400);
    OSCCON.F6 = 1;
    OSCCON.F5 = 1;
    OSCCON.F4 = 1;
    ADCON0 = 0b00000001;
    ADCON1.F7 = 1;
    ANSEL = 0b11111111;
    TRISD = 0;
    PORTD = 0;
    
    UART1_Write_Text("LO");
    UART1_Write(13);
    PORTD = 255;
    Delay_ms(500);

    UART1_Write_Text("L1");
    UART1_Write(13);
    PORTD = 255;
    Delay_ms(500);
    
    error = Soft_UART_Init(&PORTC, 5, 4, 9600, 0);
     
    do
    {

     if (error == 0)
     {
      PORTD = 255;
      Soft_UART_Write(some_byte);
      delay_ms(100);
      PORTD = 0;
      delay_ms(100);
      error = Soft_UART_Init(&PORTC, 5, 4, 9600, 0);
     }
     else if (error > 0)
     {
      PORTD = 0;
     }
     
    }
    while(1);
}

 

[tpetar]

What microcontroller ?

What version of compiler did you use ?


Add this delay after UART_Init for stabilization

Delay_ms(100);

 

[lockman_akim]

im using pic16f887
mikro c version 6.0

i dont have any problem with hardware uart, hardware uart is connected to the sensor.
software uart is connected to xbee. yes i already configure xbee and it manage to communicate each other.
but when i plug xbee to my board, no data was received.

i try to directly used usb to uart converter and the data showed on my pc.

 

[lockman_akim]

Hi, after further test, i figure out that the problem is cause by the Xbee Pro S1 (https://www.sparkfun.com/products/8742) that i used. after change it to non pro xbee s1 (https://www.sparkfun.com/products/8665). it work perfectly. anyone have any idea why it happen like that?

 

[lockman_akim]

i change the Brown Out Reset to off. and it solved my problem.