[Solved] Identify the issue in this spidev code snippet:import spidev spi = spidev.SpiDev() spi.xfer2([0x01, 0x02]) spi.open(0, 0) spi.close() | Raspberry Pi

Raspberry Pi - SPI Communication

Identify the issue in this spidev code snippet:

import spidev
spi = spidev.SpiDev()
spi.xfer2([0x01, 0x02])
spi.open(0, 0)
spi.close()

ANot setting max_speed_hz before transfer

BCalling xfer2() before opening the SPI device

CUsing incorrect data format in xfer2()

DMissing import statement for spidev

Step-by-Step Solution

Solution:

Step 1: Check method call order
spi.open() must be called before any data transfer methods like xfer2().
Step 2: Identify the error
Here, xfer2() is called before spi.open(), which will cause an error.
Step 3: Other options
max_speed_hz is optional; data format is correct; import is present.
Final Answer:
Calling xfer2() before opening the SPI device -> Option B
Quick Check:
Always open SPI before transfer [OK]

Quick Trick: Open SPI device before data transfer [OK]

Common Mistakes:

MISTAKES

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Identify the issue in this spidev code snippet: