Part Number:MSP430FR2311
Hi guys
I have a question in regards to how does the system work for the gas chamber, emitter and receiver diodes.
So based on the references design, it has 1 input GPIO to the emitter and 1 input GPIO to the receiver.
May I question what is the purpose of using two GPIO inputs, P2.7 and P1.6?
I would like to confirm whether the following theory is correct.
1. MCU will activate P1.6 to receiver to get the voltage level with no light, no smoke.
2. MCU will activate P2.7 and P1.6 to get voltage level with no light, no smoke.
3. MCU will activate P2.7 and P1.6 to get higher voltage level with light, got smoke.
So MCU will compare between (2). and (3). to check if there is smoke?
If so, is it possible to have a common GPIO to activate both P2.7 and P1.6 at the same time?
OR, just having 1 input at P2.7 is sufficient, without the input of P1.6?
Sorry if my explanation is bad, I want to know the theory behind this concept and the purpose for 2 GPIO inputs.
