Interfacing an LPC1114 with a keypad and a display.

Interfacing an LPC1114 with a keypad and a display

This example prints the ASCII code of a key on a 7 segment display. This is a development of a previous project (available here). In this project, the display is updated using the SysTick interrupt freeing up the processor for other foreground tasks. Files and documentation are available here.
The toolchain (compiler etc) can be obtained from https://launchpad.net/gcc-arm-embedded. This works for many operating systems.
The software tool that downloads code to your device is called lpc21isp and can be found here http://sourceforge.net/projects/lpc21isp/
If you can't compile this tool (e.g. if you are on a Windows machine) then you might try Flashmagic

Progamming

The makefile provided with this example creats a file called main.hex (Intel Hex format) which must be downloaded to the microcontroller. To do this you must press the reset and mode buttons together. You then release the reset button first followed by the mode button. The chip should now be in ISP mode allowing FlashMagic or lpc21isp to download the code to it. When download is complete press reset once more and the program should run.

More information

This page will be further edited in time and a number of other examples will be added. If you need more information contact frank DOT duignan AT dit DOT ie. :)