Transmit "Hello World!" to a Terminal Program using EUSART with PIC16F15244

The 'pic16f15244-eusart-example' code example uses the PIC16F15244 Curiosity Nano Development board to demonstrate how to transmit "Hello World!" to a PC terminal application using the EUSART module.

PIC16F15244 Curiosity Nano Development Board:

Related Documentation

• PIC16F15244 Product Page

Software Used

• MPLAB® X IDE 6.15
• MPLAB® XC8 2.45
• MPLAB® Code Configurator (MCC) 5.3.7
• Microchip PIC16F1xxxx Series Device Support (1.20.366)

Hardware Used

• PIC16F15244 Curiosity Nano
• Micro-USB to USB 2.0 cable

Setup

1. Connect the PIC16f15244 Curiosity Nano board to a PC using the Micro-USB to USB 2.0 cable.
2. If not already on your system, download and install MPLABX IDE version 6.15 or newer.
3. If not already on your system, download and install the XC8 C-Compiler version 2.45 or newer.
4. Open the 'pic16f15244-eusart-example.X' project (see Figure 1).

Figure 1: Open Project Window

5. Click on the 'Project Properties' button to open the Project Properties window. Select the Curiosity tool from the Connected Hardware Tool drop-down menu (see Figure 2).

Figure 2: Select the Nano in Project Properties Window

6. Click on the 'Make and Program Device' button to program the PIC (see Figure 3). Verify that the device is successfully programmed (see Figure 4).

Figure 3: 'Make and Program Device' Button

Figure 4: Program Complete

7. Open a terminal program on your PC. For this example, Tera Term was used as the terminal program.

a. Port Selection is used by the Nano board (see Figure 5).
b. Configure the serial port (see Figure 6).

Figure 5: Select the USB Port

Figure 6: Configure the Serial Port

Operation

After the Nano board is programmed, the EUSART module will transmit the string "Hello World!" to the PC terminal window at a baud rate of 9600 bps. Output pin RC0 is configured as the TX output through PPS. Nano hardware also connects pin RC0 to the USB receive line, allowing a quick connection to the PC terminal without any additional wires or USB bridge circuits.

The EUSART module is configured to use the printf() function call that is built into the XC8 libraries. In MCC, simply mark the 'Redirect STDIO to USART' check-box (see Figure 7), and the additional function call are added to the project. Example 1 shows the use of the printf() function.

Figure 7: 'Redirect STDIO to USART' Check-box

Example 1: Main() Code Snippet

void main(void)
{
    SYSTEM_Initialize();                   // Initialize the device

    while (1)
    {
        printf("Hello World! \r\n");       // Write over EUSART
        __delay_ms(2000);                  // Two second delay
    }
}

Summary

The 'pic16f15244-eusart-example' code example uses the PIC16F15244 Curiosity Nano Development board to demonstrate how to transmit "Hello World!" to a PC terminal application using the EUSART module. Once programmed, the EUSART will transmit the string 'Hello World!' to a PC terminal program.

Figure 8: Hello World!