Add TX buffer for Serial#58

Merged

cmaglie merged 8 commits intoarduino:masterfrom

sandeepmistry:buffer-serial-tx

Jul 11, 2017

Commits on Jul 11, 2017

Add availableForStore method to RingBuffer

sandeepmistry
authored and
cmaglie
committed
Add enable and disable data register interrupt APIs for UART

sandeepmistry
authored and
cmaglie
committed
TX buffering for UART using RingBuffer

sandeepmistry
authored and
cmaglie
committed
Correct disableDataRegisterEmptyInterruptUART to use INTENCLR instead of INTENSET

sandeepmistry
authored and
cmaglie
committed
Update flush to also wait for TX buffer to empty

sandeepmistry
authored and
cmaglie
committed
Use reg instead of bit to enable/disable the DRE interrupt

sandeepmistry
authored and
cmaglie
committed
Also check if TX buffer is empty before writing to data to UART reg directly

sandeepmistry
authored and
cmaglie
committed
Change IRQ handler to check if data is available before check for DRE

sandeepmistry
authored and
cmaglie
committed