Hello, Does somebody have a good idea how to implement a tachometer on the mini2440 while running the linux kernel on it? (with activated gpio driver)
tachometer
Hello, for low speed ones, you may write a routine to continuously check gpio (and count upon level change). for medium speed ones, you may search to find any unused external interruptable gpio pin (that hope its device driver be available). for high speed ones, you have to implement an external counter ic (i.e. a uC with configured counter pin) and then read it using uart (or may available i2c or spi on gpio). regards www.dadehabzar.ir
I need high speed since the board is intended to replace my current i386 based datalogger on our tractor-puller so an uC sounds like the best solution, I have a couple of rpm's to watch so the uC also takes the load of the board. Thanks.
Try this for some ideas: http://www.avrfreaks.net/index.php?name=PNphpBB2&file=search&mod... if going the 8bit route.