Easimer/clock

Arduino-based digital clock

clock

clock is a ATmega2560-based digital clock.

Features:

• Current time is regularly saved to an external EEPROM chip (PCF8594C-2)
• A High Endurance module implementing wear leveling for the external EEPROM
• High-level input system so one physical button can be used for multiple actions
• BCD to 7-segment decoding and digit multiplexing
• Most modules are hardware-independent and unit tested

Planned features:

• Stopwatch
• Reduce number of used pins by using an external BCD decoder
• Support for Nokia 5110 displays

Building

To build the Arduino executable, simply open the repository in the Arduino IDE and compile as usual.

To build and run the tests on a PC use CMake to generate the VS solution/Makefiles:

$ mkdir build
$ cd build
$ cmake ..
$ cmake --build .

Then either run CTest or the test executable directly:

$ ctest -C Debug
OR
$ ./clock_tests

Misc

The EEPROM HE module implements the algorithm described in "AVR101: High Endurance EEPROM Storage".

Pin assignments are reconfigurable in config.h.

We're using the utest.h unit testing library.