[Solved] What will the following code print if the MCP3008 channel 0 reads maximum voltage? import spidev spi = spidev.... What will the following code print if the MCP3008 channel 0 reads maximum voltage? | Raspberry Pi

Raspberry Pi - SPI Communication

What will the following code print if the MCP3008 channel 0 reads maximum voltage? import spidev spi = spidev.SpiDev() spi.open(0,0) resp = spi.xfer2([1, (8+0)<<4, 0]) data = ((resp[1]&3) << 8) + resp[2] print(data)

A255

B0

C1023

DError due to invalid channel

Step-by-Step Solution

Solution:

Step 1: Recognize maximum analog input value
The MCP3008 outputs a 10-bit value, max is 1023 when input voltage is highest.
Step 2: Confirm code reads channel 0 correctly
The command targets channel 0, and data calculation extracts the 10-bit value correctly.
Final Answer:
1023 -> Option C
Quick Check:
Max ADC value = 1023 [OK]

Quick Trick: Max MCP3008 reading is 1023 for full voltage input [OK]

Common Mistakes:

MISTAKES

Confusing 8-bit max (255) with 10-bit max (1023)
Misreading channel number in command
Expecting error for valid channel 0

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What will the following code print if the MCP3008 channel 0 reads maximum voltage?

Step 1: Recognize maximum analog input value

Step 2: Confirm code reads channel 0 correctly

Final Answer:

Quick Check:

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