Embedded C8051

Embedded System's course project with a 8-bit C8051F020-DK board connected to a custom board via I²C protocol.

Requirements

Notice: Unfortunately the compiler is proprietary and the free limited version is walled behind a registration form, so good luck getting it.

• Silicon Labs IDE
• Keil® PK51 Developer’s Kit - contains the 8051's C compliler, linker and assembler.
• C8051F020-DK board
• Custom board built in-house at UniMiB, connected to the C0 port via I²C protocol, with the following components:
  • MMA7660 accelerometer
  • LM76 thermometer
  • MCCOG21605B6 display

Functionalities

• Inclination sampling on the 3 axis form the accelerometer every 100ms
  • Last 8 samples stored in a buffer
• Temperature sampling every 1000ms
• Display udpated every 300ms showing:
  • 3-axis inclination (signals smoothed calculating the mean of the buffered samples)
  • Temperature
• Depending on how the P3.7 button is pressed it is possible to:
  • Quick press: display backlight on/off
  • Long press (more than 1s): backlight regulation mode; the display brightness starts to "breathe" until the pressure on the button is released

Media

Two media found searching trough old personal photos:

Photo of the two boards attached, early in development

final_build.mp4

Short animation of one of the latest builds

Sources

• Synlab Software Toolchain
• C8051F02x Datasheet (archived)
• C8051F02x Development Kit Datasheet (archived)