I did not persevere with the CF as it required a massive number of parallel connections (about 40-50 I think) whereas the MMC and SD only have seven, of which only 2 are data lines, the rest being power, ground and clock etc.
So I dont know the initialisation procedures for the CF but certainly...
Fetterlabs,
I had a lot more success with the PIC 16F876a (although any will do), using PicBASIC Pro and SD or MMC cards for storage. We can write 3 channels @ 100Hz each, without any difficulties.
Cheers
Chris
Jean-Michel,
I just found a copy of that yesterday. There is quite a lot of info in there and I think I have worked out how to send the commands.
I just have to write some code to my PICAXE to check if I can interogate the card as I think I should be able to.
Cheers
Chris
I have recently decided to use an MMC storage card for storing data on the fly from a data acquisition setup.
I am having a bit of trouble finding the required commands for writing to and reading from the card.
The System Summary avaiable from the MMC Association (mmc.org) notes that these...
Raivo,
Thanks for the help. I was heading toward MMC because there are some helpful sites on the web already.
Are you able to give me some brief descriptions of your previous work with MMCs ?
Cheers
Chris
I am wanting to write data to a CF device. Does anyone know the quickest way to do this and what is the maximum speed I might expect?
It is for a portable, battery operated device, for data acquisition.
Now what about USB devices are they quicker, can a USB memory stick be used as a standalone...
Thanks cbarn, unfortunately I am after a portable solution, hence the need for a Compact Flash card for storage. There is also a size issue that rules out the PC based solution.
I am really just after a chip that will take the input data and store it on a CF card. I thoight there may be a chip...
Does anyone know of a microcontroller that can read serial input and write to a CompactFlash (CF) card ?
I would prefer some form of BASIC language but anything will do.
The card requires a 10-12 bit data rate of around 300 Hz.
Regards
Chris
Thanks gordonl and jbartos,
I contacted REXXON and unfortunately there is not an Australian supplier for this component. They did offer to replace the whole module for US$60 (about A$120) which for a 5 year old A$200 scroll saw seemed a bit excessive (particularly for a $2 IC).
I had already...
I have discovered that the IC in a scroll saw power controller is faulty. Unfortunately the number on the chip has mostly melted and I cant read the number.
I am pretty sure it is an op amp or a PWM chip, but perhaps not.
The chip is a National Semiconductor and what can be read of the number...
In a fixed wing aircraft the sideslip manouevre is used to loose height rapidly without gaining airspeed.
In a helicopter is the Sideslip regime just defined as moving at an angle (the sideslip angle) to the airflow or does a helicopter also loose altitude during a sideslip?
References please.
