Pico C SDK and Programmable I/O

10 Lektionen in dieser Stufe

1. Setting Up the Pico C SDK Toolchain and CMake
   Install the compiler and SDK and build a project from the command line. · Lab: Build and flash the blink example from your Pi using CMake.
2. C for Python Programmers: Types, Pointers and Headers
   Read and write the C constructs the SDK relies on. · Lab: Port a small MicroPython script to C with stdio output over USB.
3. Interrupts, Alarms and Repeating Timers in C
   Schedule precise periodic work and keep interrupt handlers short. · Lab: Generate a 1 kHz tick and measure its jitter with a logic analyzer.
4. PIO State Machines Explained Instruction by Instruction
   Describe the nine PIO instructions, shift registers and clock dividers. · Lab: Hand-trace a square-wave PIO program and predict its frequency before running it.
5. Writing a PIO Program for WS2812 LEDs
   Generate tight timing waveforms that software loops cannot. · Lab: Drive an LED ring from PIO and verify bit timing on a logic analyzer.
6. Counting Quadrature Encoders in PIO
   Capture fast inputs without losing counts. · Lab: Count a motor encoder at full speed and compare with a GPIO-interrupt counter.
7. Moving Data with DMA
   Stream samples between peripherals and memory with no CPU involvement. · Lab: Capture a burst of ADC samples through DMA and print the buffer.
8. Using Both Cores Safely
   Split work across two cores and share data without races. · Lab: Run the control loop on one core and communication on the other using a queue.
9. Debugging over SWD with a Debug Probe and GDB
   Halt, step and inspect firmware on the chip. · Lab: Set a breakpoint in the control loop, inspect variables and catch a hard fault.
10. Designing a Register-Style I2C Peripheral
    Make the Pico behave like a well-documented I2C chip. · Lab: Implement setpoint, speed and status registers and read them from the Pi with smbus2.

Abschlussprojekt

A motor-control co-processor: a Pico that counts a quadrature encoder in PIO, runs a 1 kHz speed loop in C and exposes setpoint and status registers to the Pi over I2C.

Teile für diese Stufe

• 2 × Raspberry Pi Pico or Pico 2 with headers
• 1 × Debug probe for SWD
• 2 × Micro-USB cable
• 1 × Breadboard and jumper wire set
• 1 × Addressable RGB LED ring or strip (WS2812B)
• 1 × DC gear motor with quadrature encoder
• 1 × Dual H-bridge motor driver
• 1 × USB logic analyzer 8-channel
• 1 × Raspberry Pi 5 or Pi 4 set from Level 1 as build host

In jeder Lektion legst du die passenden Teile direkt in den Warenkorb. Raspberry Pi →