Help in USART Terminal, MikroC and Proteus

[Eng_Bandar]

Hello for all,

I want send data (letters or numbers) by USART Terminal tool in MikroC Pro

This is my code ( example from help file in MikroC Pro )

Code: Select all

char uart_rd;

void main() {
  ANSEL  = 0;                     // Configure AN pins as digital
  ANSELH = 0;

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

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

  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
    }
  }
}

and this is circuit



I have two problems

1- If I send 'a' I should recieve 'a' but I recieve other letter (I sent 'a' I recieved 'y' ) Why ?

this is picture illustrate that



2- In Proutes I do'nt see any thing in Virtual Terminal just black screen Why ?



help please

[zan]

You should work with Vurtual Terminal or Compim component. You can not use both of them like you did. Also, TX pin from PIC, need to be connected with RXD pin, and RX pin to TXD pin.

[Eng_Bandar]

You should work with Vurtual Terminal or Compim component. You can not use both of them like you did. Also, TX pin from PIC, need to be connected with RXD pin, and RX pin to TXD pin.

Thank you zan for your reply

if I connnect TX pin from PIC to RXD not work (I don't no why?) I searched in web about this point I found most circuits like this I don't have interpret for this .

What do mean "You should work with Vurtual Terminal or Compim component" I used Virtual Terminal, about Compim component I don't know it and how can I use it ?

thank you zan again

[zan]

Try this

[Eng_Bandar]

Try this

I tried it but nothing happened. Also How you want PIC send data without COM ? in your connection no sender and no reciever. This code says if you send 'a' or any data from PC to PIC, PIC will send same data from PIC to PC.

[zan]

This code says if you send 'a' or any data from PC to PIC, PIC will send same data from PIC to PC.

Please, don't forget that you are working in Proteus, so if you send 'a' from virtual terminal to PIC, the PIC will return 'a' to virtual terminal.

[Eng_Bandar]

This code says if you send 'a' or any data from PC to PIC, PIC will send same data from PIC to PC.

Please, don't forget that you are working in Proteus, so if you send 'a' from virtual terminal to PIC, the PIC will return 'a' to virtual terminal.

I send data from USART Terminal in MikroC Pro to PIC (in Proteus through RS232) not from virtual terminal as you said. I use virtual terminal to see find sending operation or no in RS232. Can you tell me if I wrong or no ?

Thank you again.

[MARIO]

Hi Eng_Bandar,

Except by these 2 lines (these registers do not exist in 16F877)

Code: Select all

ANSEL  = 0;                     // Configure AN pins as digital
ANSELH = 0;

your code is running Ok.
Use the Proteus circuit sent by zan, configure the PIC in Proteus to your .cof or .hex file, set the frequency and configuration bits.
When you run it you'll see the word "Start" in the virtual terminal.
When you type anything you'll see the answer, not what you are typing. Maybe this can cause confusion because response is immediate.
If you doubt that, delete the line from TX of the PIC to the RX of the terminal.
Another way to see that PIC is OK, put an oscilloscope and connect one channel to RX and the other channel to TX.
Besides that you can put a large time between reading your typing and PIC response. It will take that time to appear in terminal screen.

Code: Select all

    if (UART1_Data_Ready()) {     // If data is received,
      uart_rd = UART1_Read();     // read the received data,
      Delay_ms(300);   //add this line to delay, so you can see that what appears on terminal screen is the response of the PIC
      UART1_Write(uart_rd);       // and send data via UART
    }

I hope I could help you.

BR.

[MARIO]

I send data from USART Terminal in MikroC Pro to PIC (in Proteus through RS232) not from virtual terminal as you said.

I think this is not possible unless you have another PC running the terminal connected to the COM port of the PC where your Proteus is running. With only one PC it will not work.
Maybe if you have 2 serial ports, one running Terminal and other Proteus and an appropriate physical cable connecting them. I'm not sure of this.

BR

[zan]

Maybe if you have 2 serial ports, one running Terminal and other Proteus and an appropriate physical cable connecting them. I'm not sure of this.

This can also work if you have two virtual serial ports installed, one of them connected to PIC in Proteus and another connected to ME Usart Terminal.

I'm using this software for virtual serial ports.

[MARIO]

@zan,

Thanks for your hint. It worked nice!

BR.

[Eng_Bandar]

Thank you guys so much for your helping

@zan

I tried your circuit agian, it is work with me perfectly. My problem was that sending data from USART Terminal but now I tried to send data from Virtual Terminal from Proteus as you siad.

I forgot to tell you that I use Virtual Serial Port Driver as you said in last post. realy I am so sorry for this.

Now I want send data from USART Terminal Tool and its port is COM1 and other port is COM2 for RS232 in Proteus. I connected these ports by Virtual Serial Port Driver.
Also Virtual Serial Port Driver illustrate me find sending and recieving operations through these ports (COM1 & COM2).

following picture illustrates Virtual Serial Port Driver



I hope my problem now clear for you.

Special thanks for zan and MARIO for your helping.

[zan]

Well, that is different story

In Proteus, RX pin from PIC need to be connected to RXD pin on COMPIM component and TX pin from PIC to TXD pin on COMPIM. Next, doubleclick on COMPIM and set:

Physical Port = COM1 (your virtual port 1)
Physical Baud Rate = 9600
Virtual Baud Rate = 9600

There is no need to edit other settings, just click OK.
Now open Usart Terminal and select Com Port = COM2 (your virtual port 2), click Connect button.
Go to Proteus and click 'Play' button.

That's it

[Eng_Bandar]

@zan

Thank you so much. I can't describe my feeling for you.
Thank you zan again and agian and agian.

I don't put Virtual Baud Rate for RS232 9600 it was 4800, O my god for this mistake.

You gave me hope to complete my project.

[Eng_Bandar]

Hi zan,

Did you write your code by MikroC or MikroC Pro?
I wrote it by MikroC Pro find problem.

your code work. But in MikroC Pro not work .