Interface VB with PIC

[ALPL]

you must enable the interrupts - I added this to the code

[stacey]

it cant work. I dont know why...

[stacey]

Ohh.. okie.. i go try agian..

[stacey]

ya, its work!!! Thanks.. I am so happy right now.

Its a good beginning... But then more works to be comng up... I can create other function and try.. Thanks thanks

Really thanks so much.

[stacey]

hey, really thanks so much yea.. Tomorrow I gonna try the other way that is pic send signal to visual studio... Hopefully its work too..

I need the both way communication for my final year project..

thanks thanks thanks...

[ALPL]

just another tip: don´t use any delays in the interrupt service routines - keep them as short as possible and do most of the work in the main-function

[stacey]

Can I know is that the reverse, to send data from PIC to Visual studio. We just use "putc" in the serial_isr function?

[Ttelmah]

You use 'putc', _but preferably not in the receive ISR.
The ISR you have is for serial receive. It implies a character is waiting to be read. 'RDA', is 'Receive Data Available'.

You have two choices for sending:
1) Just send the data from your main. Your recieve ISR will still receive characters that arrive while this happens.
2) Have a transmit ISR. Look at ex_stisr.c. This stores the characters in a RAM buffer, and only sends them when the transmit circuitry signals it can take another character.

Now, what you do with just _one_ character, should work. However if you send anything more than this, the chip will start waiting to send, and if this happens you risk losing characters that are arriving....

Best Wishes

[stacey]

Can I know how to change my code?

Mean something like below?

[ALPL]

This will work for the beginning:


void main()
{

set_tris_c(0b10000000);

enable_interrupts(int_rda);
enable_interrupts(global);

while(1)
{
if (rx=='A')
{
putc('Y);
rx=0;
}

}

}