Full Analysis of SPI Emulation Using Raspberry Pi Pico PIO: Principles, Timing and Code Practice
This article introduces CPOL=0/CPHA=0 SPI realized by RP2040 PIO in MicroPython, including PIO assembly code, PIOSPI class with read/write functions, loopback t
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Project description
【Preliminary Note】The original hardware example in this article was written based on the RP2040. The actual hardware used in this hands-on demonstration features the W55RP20 as the main controller chip. The circuit logic and UF2 flashing operation principles are universally applicable, with only the main controller model differing. The original chip model mentioned in the circuit descriptions below is provided for reference purposes only. PIO Implementing SPI Communication Here, we need to use the KingST logic analyzer to connect to the long-pin headers on the Fengya One Board - Universal…
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