This patch allows to configure the DAC resolution in the constructor and
in the init function, eg:
dac = DAC(1, bits=12).
The default resolution is 8 bits for backwards compatibility. The bits
sets the maximum value accepted by write and write_timed methods, being
2**bits - 1.
When using write_timed with 12-bit resolution, the input buffer is
treated as an unsigned half-word array, typecode 'H'.
See PR #1130 for discussion.
Key is always entered as a string, but if security is WEP, the key
is converted automatically to hex before connecting or configuring
the device as an AP.
Changes are based on this post:
https://github.com/micropython/micropython/issues/876#issuecomment-115255551
The constructor can optionally take the same params of iwconfig in
order to configure WiFi when creating the object. Params are
keyworkd only. The WiPy accepts:
- mode (int -> WLAN.AP or WLAN.STA)
- ssdi (string)
- security (int -> WLAN.OPEN, WLAN.WEP, WLAN.WPA, WLAN.WPA2)
- key (string)
- channel (int (1-11))
- antenna (int -> WLAN.INTERNAL, WLAN.EXTERNAL)
This is how the names will be printed on the sticker that goes on top
of the EMI shield. The shorter names also help saving a few bytes of
RAM and ROM.