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This chapter puts aside the Assembly Language instructions for the ARM Cortex-M-series processor that have been studied and looks at a new Assembly Language syntax quite different from ARM’s. The RP2040 contains eight programmable I/O (PIO) processors that are programmed as state machines with their own Assembly Language instructions, whereas the RP2350 has twelve of these. There’s a tool in the SDK, pioasm, which assembles these in a similar manner to the GNU Assembler.

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How to Initialize and Interact with Programmable I/O

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  • 发表日期：

    2026年

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  • Stephen Smith

摘要

This chapter puts aside the Assembly Language instructions for the ARM Cortex-M-series processor that have been studied and looks at a new Assembly Language syntax quite different from ARM’s. The RP2040 contains eight programmable I/O (PIO) processors that are programmed as state machines with their own Assembly Language instructions, whereas the RP2350 has twelve of these. There’s a tool in the SDK, pioasm, which assembles these in a similar manner to the GNU Assembler.