The IF820 Development Kit (DVK) is a complete development platform for the Vela IF820 Module. The DVK board provides access to the IF820 Module’s interfaces and peripherals, and includes a debug probe for programming and debugging the IF820 Module.

When a Vela IF820 Development Board is plugged into a computer, two COM ports are enumerated. One is the HCI UART, the second one is called the PUART. Programming is done over the HCI UART, and the application uses the PUART to use the EZ-Serial API.

Determining the IDs of IF820 COM Ports

Follow the instructions below to determine which COM Port is the PUART, and which is the HCI UART.

MAC OS using Decisive Tactics Serial Program

HCI UART MAC OS

Note: the Port 1 is the HCI Port, Port 2 is the PUART.

Windows OS using Device Manager

HCI UART Windows OS

Use Device Manager in Windows to determine the COM Port Number. Right click to view the properties.

UART Properties

Note: that UART0 is the HCI UART, and UART1 is PUART.

Default UART Parameters

The HCI and PUART interfaces are configured for 115200 baud, 8 data bits, no parity, 1 stop bit.

RTS/CTS hardware flow control is enabled on the HCI UART and should be used by any device communicating with the HCI UART.