Playing with MCU Part 2 - USB to Serial Port

            Most computers have it, and it is also a mainstream interface. It has 4 wires, 2 power wires, and 2 data wires. The transmission speed is 480MB/s

What is a Serial Port (COM)?

              It has 9 pins, numbered 1 to 9. We usually use pins 2, 3, and 5. It is mainly used for communication between PC and microcontroller. Desktop computers generally have 2 serial ports, which are located at the back of the chassis. Ordinary laptops do not have serial ports, which brings inconvenience to development.

All we need is a USB to serial converter to enable the laptop to have program burning and communication functions.

--------------------------detailed steps--------------------------------------------

Step 1, you need a USB2COM adapter. Thanks to Xiaobai for the hardware support.

Step 2, install the driver.

Step 3, install the adapter, and automatically search and install the driver. In the device manager-port, you can see that COM4 has been added.

Step 4, use the debugging assistant to debug the serial port, select COM4 in the software, here you need to connect the 2.3 wires of the serial port to realize your own transceiver communication.

Step 5, download the program to the lower-level microcontroller. Select COM4 in the software. It is very easy to use and does not require a conversion cable.

It shows that the burning is successful, which means the computer has a serial port!