On Sat, Nov 19, 2011 at 7:18 PM, Arun Venkataswamy <[email protected]> wrote: > On Sat, Nov 19, 2011 at 5:48 PM, Mohan Sundaram <[email protected]> wrote: >> I work with LCD displays now. We can get displays at a price points of >> under $10 for 20x2 and 16x2 displays. Most of these controllers come >> with SPI and UART interfaces. Look up http://www.trulydisplays.com or >> http:/www.everbouquet.co.tw. >> > > I will take a look at these links. > The 16x2 lines are available here at ritchie street from Rs.150/- but these > are all parallel interface. No serial interface.
I'm building a PIC based product with a display that interfaces on SPI. The LCD driver also takes parallel. It is quite likely these displays in Ritchie street can be stripped off the parallel interface chip and be interfaced to our microcontroller directly. USB to parallel i/f chips are expensive as they are low volume products. Since I'm building a consumer product, I'm getting prices that are way below sample pricing. I'll try and get some good prices. Some other indicative pricing - 1.6" square 128x128 pixel LCD @ 3.5 USD, 128x32 pixel LCD @ 5.5 USD etc are achievable. We can use software character generators in uC instead of having a character generator chip in the LCD driver thus bringing down the price. I've found dedicated USB <=> serial/parallel devices to be more expensive (almost twice) than uCs that have USB/SPI etc and enough general purpose programmable I/O pins to implement a 7 - 14 bit parallel interface. We will need to implement the parallel port handshake and protocol in software. We've done that for SPI (softSPI) which works well. -- Mohan Sundaram _______________________________________________ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
