Comments for semifluid.com

Comment on PIC16F88 Delorme Tripmate GPS Logger by Robert

Robert — Thu, 26 Aug 2010 15:18:47 +0000

@mark

It will sort of…

The hyperformance uses “EARTHA” as the string instead of “ASTRAL”.
Also and this is where it gets complicated, the hyperformance uses binary data instead of a $GPRMC sentence.

So what does all this mean to you? Well the code has to be rewritten to handle the binary data but the circuit is exactly the same.

I know it was nearly a year ago you asked this question. But I thought I would provide the answer in case anyone stumbled along here. If anyone has questions about the hyperformance, you can e-mail me at hyperformance(AT)learn2think.org. Of course replace (AT) with the appropriate symbol and hopefully that won’t garner to much spam.

Comment on PIC18F2550 USB HID IO by Alin Ipatescu

Alin Ipatescu — Wed, 18 Aug 2010 14:04:39 +0000

I was not specific. Your project using 20MHz
PLLDIV=0b100 (PLL Prescaler /5) ->4MHz
using the PLL -> 4*24=96MHz
divide by 2 -> 48MHz
USBDIV=0b1
FSEN=0b1

Full speed? your project is similar to my calculations?

Comment on PIC18F2550 USB HID IO by Alin Ipatescu

Alin Ipatescu — Wed, 18 Aug 2010 14:00:10 +0000

Hi,

I was studied the datasheet of PIC18F 2455/2550/4455/4550, at page 26 of 438
http://ww1.microchip.com/downloads/en/DeviceDoc/39632e.pdf
I am asking about the oscillator. If I want to use one that is 8MHz:
PLLDIV=0b001 (PLL Prescaler /2) ->4MHz
using the PLL -> 4*24=96MHz
divide by 2 -> 48MHz
USBDIV=0b1
FSEN=0b1

So I will have 48MHz so full speed. Is this possible? I heard it is only in ideal cases. I’m not interested in full speed, but I have a board made by someone and it has a quartz of 8MHz. I have read that low speed requires 6MHz clock.

I want to use on the PC side a C# terminal, that use a class SerialPort (I want my uC be seen as a VCP – virtual COM port). Are you familiar with my choice?

Thanks in advance.

Comment on PIC18F2550 KS0108 Graphical LCD Oscilloscope by links for 2010-08-11 « Where Is All This Leading To?

links for 2010-08-11 « Where Is All This Leading To? — Thu, 12 Aug 2010 00:36:36 +0000

[...] semifluid.com » Blog Archive » PIC18F2550 KS0108 Graphical LCD Oscilloscope (tags: ks0108 pics pic graphics arduino circuits lcd project projects make microchip electronics oscilloscope microcontroller graphical schematics diy) [...]

Comment on PIC18F2550 USB HID Oscilloscope by Erdem U. Altinyurt

Erdem U. Altinyurt — Wed, 11 Aug 2010 13:28:09 +0000

Hi there! Thanks for the project. At least I don’t fear from USB port any more

You application is good but doesn’t works with linux.
I recreate it’s GUI application using wxPython and pyusb. I can say that it’s much faster than VB…
It could also work with windows soon (because of there is no libusb1 for windows but libusb0)
Although It’s easy to convert code to use libusb0 library also. But I don’t care it..

Here is the my git repo for the python GUI. You could also give link at top.
http://github.com/EUA/PyOSC

Regards

Comment on PIC18LF2550 Wireless Servo Controller by jaaziel

jaaziel — Thu, 05 Aug 2010 01:43:25 +0000

sir may i ask how to connect the servo motor on the camera and how to make system on vb6 because this system is our thesis the wireless camera using vb..sir it possible to make a system on vb trough this servo controller

Comment on PIC18LF2550 2.4GHz Serial Link by rudy kaderi

rudy kaderi — Mon, 26 Jul 2010 17:50:12 +0000

srry for the comment.. didnt notice the asm and .c ! im so sorry thanks for the project

Comment on PIC18LF2550 2.4GHz Serial Link by rudy kaderi

rudy kaderi — Mon, 26 Jul 2010 17:41:57 +0000

hello , this project is just what im looking for! im building an ultra-sonic self maintaining mobile radar scanner for my BS project.. big name huh?! i tried usb communication but im stuck with a short range! so i need it wireless, and preferably i want to use ur project to make my last 25% part of my project. Can you help me and send me the source codes to my email ahmad_kaderi@hotmail.com ..cause HEX are useless if i want to change the program. And i will add your name in my BS report to maintain all rights. thank you in advance

Comment on Tracking a Bike Ride & PIC16F88 GPS Logger DR1r7 by sanjay saini

sanjay saini — Tue, 20 Jul 2010 09:36:52 +0000

hi i am doing my M.Tech Final year project “vehicle Tracking system”so first i collect the Raw data through GPS transceiver so plz tell me how to stored in C# programming

Comment on 8×8 RGB LED Display by Steve

Steve — Wed, 07 Jul 2010 13:52:18 +0000

@Peter: The reason that it appears as though it is constantly resetting is because the code now looks for a “sync byte” at the beginning of each command: 0xAA

To get the VB code working with the DR1r8 firmware, a modification needs to be made to the Form1.vb source code in Private Sub timerPlayMovie_Tick. Change the following snippets of code:
tempData = Chr(&H10)
tempData = tempData & Chr(Int(movieColor(currentFrame,…

To:
tempData = Chr(&HAA)
tempData = tempData & Chr(&H10)
tempData = tempData & Chr(Int(movieColor(currentFrame,…

Basically, this just appends the sync byte to the beginning of the packet.