Installation guide

PicoScope 4000 Series (A API) Programmer's Guide 21

4.2

ps4000aChangePowerSource

PICO_STATUS ps4000aChangePowerSource

(

int16_t handle,

PICO_STATUS powerstate

)

This function controls the two-stage power-up sequence when the device is plugged

into a non-USB 3.0 port.

If you receive the PICO_USB3_0_DEVICE_NON_USB3_0_PORT status code from one of

the OpenUnit functions (ps4000aOpenUnit, ps4000aOpenUnitAsync or

ps4000aOpenUnitProgress), you must then call ps4000aChangePowerSource to

switch the device into non-USB 3.0-power mode.

Note. The PicoScope 4824 has two power supply options:

1.To power it from a USB 3.0 port, use the USB 3.0 cable supplied.

2.To power it from a non-USB 3.0 port, use the double-headed USB 2.0 cable supplied

and plug it into two USB 1.1 or USB 2.0 ports on the host machine.

Applicability

All modes

Arguments

handle, the handle of the device.

powerstate, the required state of the unit. Must be set to

PICO_USB3_0_DEVICE_NON_USB3_0_PORT.

Returns

PICO_OK

PICO_POWER_SUPPLY_REQUEST_INVALID

PICO_INVALID_PARAMETER

PICO_NOT_RESPONDING

PICO_INVALID_HANDLE