max3421e – Provide USB host via a connected MAX3421E chip.¶
Here is how to test with the MAX3421E featherwing:
import board
import max3421e
import time
import usb
spi = board.SPI()
cs = board.D10
irq = board.D9
host_chip = max3421e.Max3421E(spi, chip_select=cs, irq=irq)
while True:
print("Finding devices:")
for device in usb.core.find(find_all=True):
print(f"{device.idVendor:04x}:{device.idProduct:04x}: {device.manufacturer} {device.product}")
time.sleep(5)
Available on these boards
- class max3421e.Max3421E(spi_bus: busio.SPI, *, chip_select: microcontroller.Pin, irq: microcontroller.Pin, baudrate: int = 26000000)¶
Interface with a Max3421E usb host chip.
Create a Max3421E object associated with the given pins.
Although this object isn’t used directly for USB host (the
usbmodule is). You must keep it alive in memory. When deinit, it will shut down USB host functionality.- Parameters:
spi_bus (busio.SPI) – The SPI bus that make up the clock and data lines
chip_select (microcontroller.Pin) – Chip select pin
irq (microcontroller.Pin) – Interrupt pin
baudrate (int) – Maximum baudrate to talk to the Max chip in Hz