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Practical Electronics - October Magazines , Electronics. Radio User - September Magazines , Electronics. Adobe is actively working to build apps that run natively on Apple computers using the Apple Silicon M1 chip. Many of our existing apps can run on M1 devices using Apple's Rosetta 2 technology. The Microbridge is a low cost device that plugs into a USB port on your desktop or laptop computer and provides three services:. It is mostly intended for use with the Micromite described elsewhere on this website and is cheap enough to be included as a permanent feature in any Micromite project.
The Microbridge featured in the May issue of Silicon Chip magazine. This web page provides a shorter description so, if you would like the full story, you are encouraged to read the magazine article. Back issues of the magazine can be purchased from Silicon Chip or electronic access can be purchased for about the cost of the printed issue. The Microbridge has two operating modes;. In this mode it appears as a serial over USB port on your desktop or laptop computer and transfers the data as a TTL serial stream to the Micromite.
The following diagrams illustrates how the Microbridge could be connected to a pin Micromite with the Microbridge also supplying the 3. Windows 10 includes the required device driver for the Microbridge but for other operating systems you can download the driver from the download section at the bottom of this page.
With the correct device driver installed the Microbridge will appear as a serial port to your computer. Using a terminal emulator such as Tera Term you can connect to this virtual serial port and anything typed on your computer's keyboard will be sent via the serial interface of the Microbridge and anything received on this interface will be sent to your terminal emulator's screen. To aid in fault finding the LED on the Microbridge will flash for every character sent or received.
Within your terminal emulator's setup you can set the baud rate for the serial interface and the Microbridge will automatically adopt this speed on its serial interface the Micromite defaults to baud so this would normally be selected. If you connect pin 1 of the programming connector on the Microbridge to the MCLR the reset pin of the Micromite you can also use the Microbridge to remotely reset the Micromite.
This is done by sending a serial break signal to the Microbridge. As a PIC32 programmer the Microbridge uses the same pinouts as the Microchip PICkit 3 programmer and can be plugged into the same six pin programming socket. The photo to the right shows the Microbridge plugged into the programming socked on a pin Micromite PCB which was originally designed for the PICkit 3. The diagram below illustrates the connections for programming the PIC32 chip used for the pin Micromite.
In this example the PIC32's 3. To program a chip you use the Windows program pic32prog. There are versions for macOS and Linux also available on the Internet. The Windows version does not need installation so you can just copy the executable to a convenient location and start a DOS box in that folder.
The command line used to program a PIC32 chip is as follows:. For example, if your Microbridge was allocated the virtual serial port of COM6 and the file that you wanted to program was 'm. When you press enter at the end of this command line pic32prog will upload the hex file to the Microbridge, program it into the PIC32 then read back the programmed data to verify that the programming operation was executed correctly.
The screenshot on the right shows the complete operation. The Microbridge has its own 3. It can supply up to mA and can be used to power the connected Micromite.
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