1/10/2024 0 Comments Hyperterm title![]() This is a rather complicated way to get a extra A/D bit, with all the usual accuracy and other problems of stitching together two 10 bit ranges to make a 11 bit range. This extra bit is the result of converting 0-1023 to a negative value. ![]() The end result is a signed 11-bit result to be sent to your program. When the comparator was low, you'd need to invert the result, then send to your program. When the comparator was high, the result is exactly what you want and can be fed to your program. Take your 10-bit result and store it as a 16-bit result. When, the comparator was low, it would also be 0-1023 however this is where you would need to do some math. Then, your AD result when the comparator was high would be 0-1023. When the signal was below ground, the output from the full wave rectifier would be positive, but the output from the comparator would be "logic low". For instance, when the signal was above ground, the output of the full wave rectifier would be positive, the output from your comparator would be "logic high". You would then need to use a comparator to detect the polarity of the input signal and apply this to a port input. Search for "full wave precision rectifier" on Google, here's an example. While you could simply reduce the signal to 5V P-P, you'd be losing half your resolution. Download and extract it to an appropriate location.If you really need to convert a +/-5V level to +1023,-1023, you'll need to bring the negative portion of the signal into the positive range.If you see output reporting your PPP local and endpoint IP addresses, then it worked.Īll steps above may be obsolete if the modem stick is supported by sakis3g which is an all in one command line script and automatises all the steps above. This is for Etisalat Misr, but should work for all the other networks that use the same device. If the above does not work, try the following (extracted from sakis3g): Make sure you replace the /dev/ttyUSB0 line with the node that your USB modem is connected to, you can see that with dmesg. Wvdial is an easy-to-use frontend to PPPd. etc/udev/rules.d/ ACTION="add", SUBSYSTEM="usb", ATTRS="0031", RUN+="/sbin/modprobe usbserial vendor=0x19d2 product=0x0031", MODE="660", GROUP="network" Create a wvdial configuration Once it exits, unplug the stick and plug it back in and it should be recognized as a modem. You are done with Windows.ĭisable CD mode on the device with wvdialįirst, remove the module usb-storage then load the usbserial module:Įxecute wvdial, it should use those commands and fail to connect. Now exit Hyperterminal and remove the USB modem. This tells the modem not to use CD mode when it is first plugged into a computer. Once connected, type the following commands: Connect to that COM port through Hyperterminal, found in the Accessories area of the Start Menu. Under the Ports section, find the COM port that's connected to the USB modem (ignore the Diagnostics mode). Once done, close the Rogers app that starts up, then head into the Device Manager ( Control Panel > System > Hardware > Device Manager). Using a Windows machine, plug in the USB device and go through the short install wizard. 1.2 Disable CD mode on the device with wvdialĬonfiguration Disable CD mode on the device.
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