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Arduino-to-PicBasicPro Code Translation Examples. Arduino code PicBasic Pro equivalent. Keypad Serial Interface and Compound Logic. RS232 Communication using PIC18F4520’s USART – PIC Microcontroller Tutorial. Posted On 11. RS232 is serial interface that means that data is. Using the Hardware Serial Port with PicBasic Pro. December 13, 2001. How to use the HSERIN command with the hardware serial port. Examples of the.

>>Access Serial Ports with PICBASIC Access Serial Ports with PICBASIC This article originally appeared in the May 2008. Last time I showed how to use Visual Basic.NET to transfer data via a PC’s serial ports, including USB virtual COM ports. I described a Visual Basic application that sends commands and receives responses from a device connected via a serial port. This month I’ll show a companion PICBASIC PRO program for a PIC microcontroller. The program detects received commands, takes requested actions, and sends responses. I’ll also show how to use an RS-422 interface to create serial links as long as 4000 ft.

Serial Port Hardware I wrote the code in this article for a PIC18F4520 microcontroller. Like many PICs, the PIC18F4520 has a built-in serial port. The chip’s EUSART manages serial communications and supports an asynchronous mode that is compatible with serial ports on PCs. PORTC.6 (TX) is the serial output, and PORTC.7 (RX) is the serial input.

I ran the code on Microchip’s PICDEM 2 Plus development board. On the board, the PIC’s serial port interfaces to a MAX3232 chip, which converts between the PIC’s 5V signals and RS-232 voltages. The board has a 9-pin female D-sub connector for the RS-232 cable.

Most RS-232 serial ports on PCs have male 9-pin D-subs. USB/RS-232 adapters are also available with these connectors.

To connect a PICDEM 2 Plus board to a serial port on a PC, use a straight-across cable, not a null-modem cable or adapter, which swaps the lines in the cable. If in doubt, use an ohmmeter. With a probe on pin 2 of each connector on the cable, the resistance should measure close to zero. Supernatural The Definitive Soundtrack. Why use a serial port and not USB? Serial ports are a good choice when you want to keep things simple and inexpensive. The program code to access a serial port is less complex than what’s required to communicate via USB.