In SX Microcontrollers, SX/B Compiler and SX-Key Tool, green_phantom wrote: Where can I contact you for the RMA number for the return of the SX Key? Ohhhh.... and since I now have the SX Blitz to fill the gap for the SX Key... I would like you to do me a favor, will you, Chris? I read an article from the www.parallax.com website on the MAX7219 8-digit, 7-segment LED display processor/driver. The PDF file that includes the data sheet for the MAX7219 shows you how to program in assembly language for the Microchip PIC ICs and for the BASIC Stamp 2. I will appreciate it if you or somebody has knowledge on how to do the same with the SX chips. One possibility I am studying is, amongst the commands for the programming of the MAX7219 in SX/B (or assembly), is the use of commands like SEROUT. I got a pair of Motorola 7212X, 7-digit, 7-segment displays with the decimal points located on top of each digit as 5-mm LED indicators, with the LEDs, from left-to-right, 3 green "DP"'s, 2 reds and 2 yellows. One of the two displays has green 7-segments and the other one has yellow segments. Both are 28-pin DIP units with the "decimal points" having their own, independent anode and cathode connections each. These are exactly the same 7-segment LED displays used in some of the earlier Motorola cell phones! I also have a tiny 9-digit, 7-segment LED display from Texas Instruments, possibly reproduction or pulled parts for some of the early TI calculators. I am going to try to make a small, calculator-like device for a costume design for a superhero novel I am writing, with a keypad featuring numbers 0-9, a "SHIFT" key for special functions and an "ENTER" button. I am going to attempt to use one single SX28AC chip and a MAX7219 with room left over for the unused I/O pins reserved for external device interface (like an RF transmitter/receiver, infrared/remote control transmitter, etc.) 12 of the 20 I/O ports on the SX28AC are reserved for the keypad button encoding, 3 for the MAX7129 (for serial interfacing) and the other five remaining I?O pins for connecting other devices to the SX28 besides the MAX7219. Though there are only buttons with numbers 0-9, the extra button I plan to include will shift the characters 0-9 like the SHIFT key on a keyboard or typewriter. The 0-9 numeric keypad will actually be a hexadecimal keypad with at least six of the buttons 0-9 used to interpret letters A to F and the other remaining four of the buttons for special commands. Any other thing I need? LIkely my imagination. Green Phantom ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=188662#m190339 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)