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Hi Ttelmah,

Now I already use both tbe and rda interrupt in the both MCU program already.

So I trying to display the data on the LCD in each of the MCU while each of them is keep transmitting da ...

may i know can my rda_isr routine write as this?

#int_rda
void rcv_isr()
{
if(fgetc(x_data)==0xAA) // when first byte = to the header byte
c_data = fgetc ...

Hi,

i try in many ways, but my full duplex really cant work.
sometimes maybe my question is silly, but i'm really not so understand to this... I'm sorry...

as Ttelmah reply before,

for full ...

== means is equal to...

!= means is NOT equal to....

I know this but just...

In if (fgetc(data)=='0xBB')...i juz proceed to implement things that i want when the data is '0xBB'...

but in ...

Hi Ttelmah,

in PIC 16f877A, the int_rda is it mean i already set the RCIE. then when RCIF also be set, then the int_rda will be trigger, am i right?

1 more things,
i wanna ask that when i repla ...

Hi, the code below is work well in half duplex, but when come to full duplex it is super super lag and slow response...I'm guessing because the while_loop at the read_packet function there.

But log ...

Hi,

can anyone tell me what is hardware uart and software uart?

i am using pin rc6 and rc 7 of 16f877a uart port...then that mean im controlling them with software, right?

Eventually, it is work...

but i wonder why the full duplex communication will make all the things become lag... juz like many packet lost ....

in default mode(when i press ntg), i send 'U', but ...

I'm using 2 set of RF module 315Mhz and 433Mhz for communication between the control board (MCU1) and the small car board (MCU2).

For 1 way communication, it work very well, I can just simply wirel ...

Hi,

From the Pulse width post, it shows how to capture the pulse width within 500ms from the CCP pin. hmm..i think i did digest the code.

But may i know how about to use it in capture the time s ...

Thanks for the suggestion. i will read through the details and try it.

Hi PCM Programmer,

You didn't say where you got your range finder module

Actually i build the circuit by my own. i did ...

Hi,

Knowing that speed of sound is around 340m/s or (34000cm/s)
that mean sound take around 1/34000= 29.4us to travel 1 cm.

Now, the ultrasonic range finder use for finding the short range dist ...

Hello,
i know i am weak in programming, this is just a only code that i can come out with. i don't know how to transmit and receive part.

I just want to simply send a signal from MCU1 to MCU2 whil ...

Thanks for the fast reply.

Hmmm, so in the #use232(...)

example
#use rs232(baud=9600, xmit=PIN_B2, rcv=PIN_B1, stream=PC)

i see there is a lot of parameter, but the common use always ...

Hi,

I need a help from you guys.
Anyone know how to write the setup code for USART without RS232?

I found that all the ccs built-in also involving #use232(...). I don't know how to apply thi ...