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CY4672 Reference Design Guide, Document # 001-16968 Revision ** 5
Contents
3.3.8 Initialization ....................................................................................................47
3.3.9 Wireless Protocol Data Payload.....................................................................47
3.3.9.1 Packet Format 1...............................................................................48
3.3.9.2 Packet Format 2...............................................................................48
3.3.9.3 Packet Format 3...............................................................................48
3.3.10 Interrupt usage and timing .............................................................................48
3.3.11 Code Performance Analysis...........................................................................49
3.4 Development Environment ........................................................................................49
3.4.1 Tools...............................................................................................................49
3.4.2 Tips and Tricks ...............................................................................................50
3.4.2.1 M8C Sleep .......................................................................................50
3.4.2.2 Watchdog Timer...............................................................................50
3.4.3 Critical Test Points..........................................................................................50
4. Keyboard 51
4.1 Introduction ................................................................................................................51
4.1.1 Design Features.............................................................................................51
4.2 Hardware Overview ...................................................................................................51
4.2.1 RDK Keyboard Assembly...............................................................................52
4.2.2 Schematic ......................................................................................................54
4.2.3 Keyboard Matrix.............................................................................................55
4.2.4 Hardware Considerations...............................................................................55
4.3 Firmware Architecture................................................................................................56
4.3.1 ROM/RAM usage ...........................................................................................56
4.3.2 enCoRe II Device Configuration.....................................................................56
4.3.2.1 Global Configuration ........................................................................58
4.3.2.2 SPI Master User Module..................................................................59
4.3.2.3 Programmable Interval Timer User Module.....................................59
4.3.2.4 Flash Security ..................................................................................59
4.3.3 Model .............................................................................................................60
4.3.4 Common Code...............................................................................................60
4.3.4.1 Generated Library Code ..................................................................60
4.3.4.2 Radio Driver.....................................................................................60
4.3.4.3 Protocol Module...............................................................................61
4.3.4.4 Flash Module ...................................................................................61
4.3.4.5 ISR Module ......................................................................................61
4.3.4.6 Timer Module...................................................................................61
4.3.5 Application Code............................................................................................61
4.3.5.1 Keyboard Module.............................................................................61
4.3.5.2 Mfgtest Module ................................................................................62
4.3.5.3 Battery Module.................................................................................62
4.3.5.4 Test Module .....................................................................................62
4.3.5.5 Encrypt Module................................................................................63
4.3.6 Configuration Options ....................................................................................63
4.3.6.1 KEYBOARD_KEEP_ALIVE_TIMEOUT...........................................63
4.3.6.2 KEY_DOWN_DELAY_SAMPLE_PERIOD ......................................63
4.3.6.3 KEYBOARD_DEBOUNCE_COUNT................................................63
4.3.6.4 KEYBOARD_MULTIMEDIA_SUPPORT .........................................63
4.3.6.5 KEYBOARD_TEST_MODES...........................................................64
4.3.6.6 KEYBOARD_TEST_MODE_PERIOD .............................................64
4.3.6.7 PANGRAM_TEST_MODE...............................................................64
4.3.6.8 KEYBOARD_BATTERY_VOLTAGE_SUPPORT............................64
4.3.6.9 LP_RDK_KEYBOARD_MATRIX .....................................................64
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