489
+ − 1 # OSTC4 Code Modules #
+ − 2
+ − 3 ## Main CPU - aka CPU1-Discovery ##
+ − 4
+ − 5 For historical reasons, the firmware of the main CPU was divided in three parts.
+ − 6 It helps development, allow smalled upgrades, and improve security as a bad manipulation won't kill the bootloader, responsible fot the next firmware upgrade.
+ − 7
+ − 8 ### Bootloader ##
+ − 9
+ − 10 The code responsible to upload new firmwares for both CPU.
+ − 11
+ − 12 ### Font Pack ###
+ − 13
+ − 14 This module does not contains any code. Just font data and images.
+ − 15
+ − 16 ### Firmware code ###
+ − 17
+ − 18 The main OSTC4 firmware. The more important modules are:
+ − 19
+ − 20 - Buehlmann decompression algorithm.
+ − 21 - VPM decompression algorithm.
+ − 22 - The simulator and dive planner.
+ − 23 - Logbook display (surface and dive mode).
+ − 24 - All user interface code, during dive or surface mode (`t*.c` files).
+ − 25 - Graphics (gfx) engine.
+ − 26 - Plus interface to the other CPU, the management of the _LCD_ screen, and the optional _Bonex_ scooter interface (No longer supported)
+ − 27
+ − 28 ## Small CPU - aka CPU2-RTE ##
+ − 29
+ − 30 The _Real Time_ CPU handle everything that requires precise timming to function perperly.
+ − 31
+ − 32 The most important modules are:
+ − 33
+ − 34 - Real time computation of gas exchanges during dive (aka the _LifeData_ structure).
+ − 35 - Analog to digital conversion for the ... ambient light sensor.
+ − 36 - I2C bus interface to the pressure sensor, the magnetic compass and the battery gauge.
+ − 37 - SPI bus interface to the buttons and to the other CPU.
+ − 38 - Serial interface to the _RS232-over-Wireless_ connection.