VOffset converted to c_double instead of c_float

[thennen]

The ps6000a API uses a double for the analogueOffset parameter of ps6000aSetChannelOn.

For ps6000, the equivalent parameter was a float, and I imagine this was mistakenly copied over to ps6000a.py

Interestingly calling with a float did not raise an error, and the offset value just had no effect.

After this change, the voltage offset setting works as intended.

[thennen]

Here are the relevant entries in the picoscope documentation pdfs:

PicoScope 6000 Series Programmer's Guide (pg 65)

3.34 ps6000SetChannel

PICO_STATUS ps6000SetChannel
(
int16_t handle,
PS6000_CHANNEL channel,
int16_t enabled,
PS6000_COUPLING type,
PS6000_RANGE range,
float analogueOffset,
PS6000_BANDWIDTH_LIMITER bandwidth
)

PicoScope 6000 Series (A API) Programmer's Guide (pg 74)

3.41 ps6000aSetChannelOn - enable and set options for one channel

PICO_STATUS ps6000aSetChannelOn
(
int16_t handle,
PICO_CHANNEL channel,
PICO_COUPLING coupling,
PICO_CONNECT_PROBE_RANGE range,
double analogueOffset,
PICO_BANDWIDTH_LIMITER bandwidth
)

[hmaarrfk]

Great thanks. i was just about to ask

[hmaarrfk]

https://github.com/colinoflynn/pico-python/releases/tag/0.7.25