Hexagon 25 EXCLUSIVE Free Serial 23
Using Python 3, I need to write data 0x00 - 0xff through serial one byte at a time and also want to print on the screen the current byte in Hex where it is in the loop. Now that I've been working on this, it seems like I can just make a simple for loop counting from 0 - 255 and send that.
Hexagon 25 Free Serial 23
Questions:Is there a difference between 0x0 and 0x00 when sending over serial?I think it is just a representation of the same information. Therefore, 0x00 IS the same as 0x0, or 0x01 and 0x1.
And as for the equivalence of 0x00 and 0x0, they are the same. The hex function in Python just returns a string that has the number in that notation. They are the same just like how the number 042 is the same as 42 in decimal. Anything you send to the serial won't even look like that. It will just be a number. But depending on the whatever serial library you are using, it probably wants a number not a string like c currently is. So you need to do serial.write(ord(c)) if you want to continue storing data as characters like that.
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USB serial ports appear at some port number. Look under "my computer->properties->hardware->ports" to find where they are. Unfortunately the same device will often appear at different comport numbers when it is on different USB hub ports.
Realterm now uses the registry to find ports rather than trying to open them all. Note if you get a registry key error when starting, this is because you do not have any serial ports installed. Install one.
The most basic PC uart has a maximum baud rate of 115,200. Any frequency of 115,200 / N, can usually be requested. More modern PC's and laptops, usually have a higher maximum baud rate of 230,400, or 460,800, or 921,600. Actual serial ports usually have a maxium that is a multiple of 115,200. Once you have found the maximum, any baud rate of /N should work.
The16C95X family of advanced uarts are able to support very high baud rates. They have 64byte FIFO's, which is a give away that they are in your serial card. When trying to get very high baud rates, there is an option in the hardware configuration of the uart to enable the "baud rate multiplier". This will result in higher than requested baud rates. ie the actual baud rate = requested rate * multiplier
RealTerm can also write LOG and TRACE files to help debugging difficult serial problems. These are completely separate from the Capture function and provided by the Turbo Async comport component. These are a reports from a dignostic queue. You can CLEAR the queue or DUMP it to a file. The Log buffer is 10000 long and Trace buffer 1000 long (V18.104.22.168). Select hexif you need to see non-printing chars. For more information see the Turbo Async Reference Guide, Chapter 2, "Debugging Facilities" (pg 33)
The main port can be passed through or echoed to the Echo Port. This is partcularly useful when the echoport is a TCP port. This allows a real serial port to be aliased across the network. (the echo port can be a real comm port too)
Many languages include a browsing tool to examine the properties and methods of the COM interface. Many properties and methods have help comments that you can see. Use the browser tool.One free tool to do this is ActiveX/COM Inspector from Oakland SoftwareBrowsing the interface will show you how it actually is, as this page may be out of date.Some languages might want the type library (.tlb). If you need it, it is part of the source package in the installer.
When Realterm has been started as an ActiveX/COM server, there will be an event tab. On this are controls to manully send the various events. This makes testing your code very much easier, as you can getting the event handler going, without having to get the actual serial data working at the same time.