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Problem with USART in PIC16F877

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saeed_pk

saeed_pk

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Hi alls,
I am using usart in PIC16F877 i want to make a Parallel to serial converter baud rate 1200 bps i made PORT B as inputs and i want to transmit serially what is fed to PORTB

i am using Mikro C Compiler by MicroElectronica and using following code
unsigned short i;

void main()
{
TRISB=0x0F;
USART_init(1200);

while(1)
{

i=PORTB;
USART_Write(i);

}
}


it does not work

but when i just receive 0-255 numbers it works by following code


unsigned short i;

void main()
{
TRISB=0x0F;
USART_init(1200);
// initialize USART modul // (8 bit, 2400 baud rate, no parity bit...
for(i=0;i<256;i++)
{
USART_Write(i);
if(i==255)
i=0;
}
}



Please Help me what i do
 

Is this a commercial project ? I have complete design ready if required.
 
Hi!
I think that there is some problem with ur PORTB. My suggestion is that you make the whole of the PORTB as an input and then try ur code also check the signals on the PORT to make sure that correct data is being read by the controller from the port.

Regards.
 

Take an oscilloscope and debug your hardware - but make sure the PIC is OK.
 

hello VSMGUY,

Are u still at the edaboard?

If so can u pls send me the codes u have developed.
Am in need of sample codes, glad if it is in MikroC, which will transmit data captured by CCP module of pic16f877a to a Pc via USART (bluetooth)
thanks
 

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