Make RX buffer size configurable for UART. Allow incoming
interrupts while copying data out of that buffer.
Signed-off-by: Marko Kiiskila <marko@apache.org>
- Remove dependency to sprintf()
- Remove dependency to cborattr
- mynewt: replace console with more direct interface to uart
- mynewt: settings to reduce included os code
Signed-off-by: Marko Kiiskila <marko@runtime.io>