ARM: TxSoftSerial:: software serial port integration (Tx only)
- be careful charging functionality not tested
- decrease ADC_IRQ priority 0 => 1
- resolve LCD coruption when compile with -O3 optimization
ARM: litle clean up
Merge pull request #35 from sasam/arm_draft_push_test

ARM: TxSoftSerial:: software serial port integration (Tx only)