Added compile option for o2/diluent pressure display: Some external devices (like the RedBare rebreather) provide pressure sensor information o2 and diluent bottles. A data channel from RTE to main CPU has been defined and a visualization has been added to the lower left corner (llc). Pressure will be displayed in the gas list as well => for o2 display the definition of a 100% o2 gas is needed. Diluent will be assigned to the first gas. The ADVANCED_GAS compile switch needs to be activated for this feature

# How to Create From Scratch a Project for _CPU2-RTE_ Code #

Follow the same procedure than for [CPU1](Detailed CPU1-Discovery Project.md), with changes:

- Create a new _board_ for processor:  
>   Series: `STM32F4`  
>   Mcu: `STM32F411xE`  
>   Debug: `JTAG`  

- Add `Small_CPU` linked source directory (instead of _Discovery_)

- Use linker script `OSTC4/Small_CPU/CPU2-F411.ld`