Keyboard
4.3Firmware Architecture
There are two architectural views of the keyboard. The first is a microcontroller configuration view of user modules. This architecture and configuration is best viewed in the PSoC Designer™ application when the project is loaded. The second view is a logical organization of the source code modules that make up the keyboard application code and other support modules.
The next few sections describe both architectures with emphasis on top level organization and over- all module operation. More detailed description of variables and functions may be obtained by refer- encing the source code.
4.3.1ROM/RAM usage
The following table shows the ROM/RAM usage. The top part exhibits the total ROM/RAM usage for basic functions, which disables all the build options below. The bottom part exhibits the ROM/RAM usage for individual build options.
Table
| Total ROM |
| Total RAM |
| (Bytes) |
| (Bytes) |
Basic Functions |
| 5861 | 127 |
|
|
|
|
Build Option | ROM Usage |
| RAM Usage |
(Bytes) |
| (Bytes) | |
|
| ||
KEYBOARD_MULTIMEDIA_SUPPORT |
| 756 | 1 |
KEYBOARD_TEST_MODES |
| 339 | 1 |
KEYBOARD_BATTERY_VOLTAGE_SUPPORT |
| 179 | 1 |
ENCRYPT_DATA TEA* |
| 871 | 13 |
ENCRYPT_DATA AES |
| 563 | 37 |
MOUSE_EMULATION_MODE |
| 610 | 1 |
MFG_TEST_CODE |
| 532 | 0 |
MFG_TX_MODES |
| 707 | 1 |
BACK_CHANNEL_SUPPORT |
| 185 | 5 |
*The ENCRYPT_TEA option needs 64 bytes extra Flash space to store the
4.3.2enCoRe II Device Configuration
The enCoRe II LV is configured using the Device Editor in PSoC Designer. The Device Editor allows the Global Resources for the part and user module parameters to be configured. The keyboard uses two separate user modules. The first module is an SPI master for communicating with the radio. The second module is a Programmable Interval Timer configured to operate as a
56 | CY4672 Reference Design Guide, Document # |
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