[Solved] What is wrong with this SPI display initialization code? import spidev spi = spidev.SpiDev() spi.open(0, 0) spi.max_speed_hz = -1000000 spi.xfer2([0x00]) | Raspberry Pi

Raspberry Pi - SPI Communication

What is wrong with this SPI display initialization code?

import spidev
spi = spidev.SpiDev()
spi.open(0, 0)
spi.max_speed_hz = -1000000
spi.xfer2([0x00])

Aspi.xfer2() requires a string, not list

Bmax_speed_hz cannot be negative

Cspi.open() must be called after setting speed

Dspidev.SpiDev() is not the correct class

Step-by-Step Solution

Solution:

Step 1: Check max_speed_hz value validity
max_speed_hz must be a positive integer representing clock speed.
Step 2: Identify invalid negative speed
Setting max_speed_hz to -1000000 is invalid and causes error.
Final Answer:
max_speed_hz cannot be negative -> Option B
Quick Check:
max_speed_hz must be positive integer [OK]

Quick Trick: SPI clock speed must be positive [OK]

Common Mistakes:

MISTAKES

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What is wrong with this SPI display initialization code?