cyw43 – A class that represents a GPIO pin attached to the wifi chip. — Adafruit CircuitPython 1 documentation (original) (raw)

Available on these boards

Cytron EDU PICO W
Pajenicko PicoPad
Pimoroni Badger 2040 W
Pimoroni Inky Frame 5.7
Pimoroni Inky Frame 7.3
Pimoroni Pico DV Base W
Pimoroni Pico Plus 2 W
Pimoroni Plasma 2040W
Pimoroni Plasma 2350W
Raspberry Pi Pico 2 W
Raspberry Pi Pico W
SparkFun Thing Plus RP2350

class cyw43.CywPin

Cannot be constructed at runtime, but may be the type of a pin object in board. A CywPin can be used as a DigitalInOut, but not with other peripherals such as PWMOut.

cyw43.PM_STANDARD_: int_

The default power management mode; same as PM_PERFORMANCE

cyw43.PM_AGGRESSIVE_: int_

Aggressive power management mode for optimal power usage at the cost of performance

cyw43.PM_PERFORMANCE_: int_

Performance power management mode where more power is used to increase performance

cyw43.PM_DISABLED_: int_

Disable power management and always use highest power mode.

cyw43.set_power_management(value: int) → None 

Set the power management register

For transmitter power, see wifi.Radio.txpower. This controls software power saving features inside the cyw43 chip. it does not control transmitter power.

The value is interpreted as a 24-bit hexadecimal number of the form0x00adbrrm.

The low 4 bits, m, are the power management mode:

0: disabled
1: aggressive power saving which reduces wifi throughput
2: Power saving with high throughput

The next 8 bits, r, specify “the maximum time to wait before going back to sleep” for power management mode 2. The units of r are 10ms.

The next 4 bits, b, are the “wake period is measured in beacon periods”.

The next 4 bits, d, specify the “wake interval measured in DTIMs. If this is set to 0, the wake interval is measured in beacon periods”.

The top 4 bits, a, specifies the “wake interval sent to the access point”

Several PM_ constants gathered from various sources are included in this module. According to Raspberry Pi documentation, the value 0xa11140 (called cyw43.PM_DISABLED here) increases responsiveness at the cost of higher power usage.

cyw43.get_power_management() → int 

Retrieve the power management register