Device Firmware

1
Device Firmware
2
PSOC Components

• The M8C core contains
• An 8-bit processor with flash memory
• Analog blocks that contain the Analog to digital
  converter
• Digital blocks to implement any additional logic
  needed
• Additional relevant components on board includes
• 4 LEDs
• 2 Potentiometers
• 2 Push buttons
• LCD Display

3
Design Components

• The steps necessary in implementing the design
  include
• Using the Device Editor in the PSOC designer to
  setup the hardware.
• Using jumper wires to connect components such as
  LEDs, Push buttons and the Potentiometer.
• Writing code in C and or assembly to control the
  hardware itself as well as to coordinate
  communications with the controlling computer.

4
Setting Up Hardware in the PSOC Designer
5
Setting Up Hardware in the PSOC Designer

• Hardware setup is done using the Device Editor
  tool in the PSOC Designer.
• This involves
• Specifying what modules to include in the user
  module selection view.
• Connecting the components, blocks and buses in
  the interconnect view
• Specifying port properties. Eg names of pins, the
  type of connection, whether driven hi or low.

6
Writing Firmware in the PSOC Designer

• Generate Application tool in the Device Editor
  creates some of the libraries necessary to
  control certain hardware components, eg the LCD
  display ADC.
• It maybe necessary to write additional code in
  assembly to control components like LEDs and
  reading push buttons. Tasks like debouncing the
  button is taken care of in these codes.
• - All the above functions are called from a main
  function, which also coordinates data acquisition
  and storage and communications with the computer.

7
Modifications Made to Existing Examples

• Some of the port set-ups in the hardware editor
  had to be modified.
• This also required modification of register
  addresses in the assembly code as well as some of
  the code itself.
• Much modifications were necessary in the main
  function and additional called functions to
  enable desired functionality as well as USB
  communications.