Crate teensycore

A kernel for teensy-4.0 microcontroller.

This crate provides all the resources necessary to begin interfacing with the teensy-4.0. To get started, you simply need to use the main! macro. This will perform a number of chores for you including the following:

• Initialize uart, xbar, gpio, system clock
• Enable interrupts
• Add panic handling
• Verify memory access
• Enable FPU

Modules

clock

A top level system which keeps track of time using the onboard clock peripheral.

debug

gate

i2c

This module provides the ability to designate any two gpio pins as SDA/SCL which allows you to introduce i2c capabilities into your project.

math

This module represents basic math functionality that you might find useful in a kernel.

mem

This module represents paged memory functionality alloc(), and free().

phys

Phys module handles kernel-level interfacing for physical, on-board peripherals.

prelude

serio

This module represents the serial communication protocol based on UART physical hardware.

system

A collection of datastructures to aid in general development.

usb_serial

Macros

assembly

This method will call the asm! macro but in a way that doesn’t break tests. Use it in lieu of the asm! macro.

gate_open

main

This is the primary macro necessary to bootstrap your application. It takes a code block that will be used as the entrypoint to your logic.

str

A thin wrapper around Str::with_content($X)

using

A directive for managing memory.

vec_str

This macro takes a static string and returns a vector containing the sequence of characters.

vector

This macro returns a vector of the items you pass to it.

Enums

PanicType

Constants

MICRO_TO_NANO

Returns how many nanos are in a microsecond

MS_TO_NANO

Returns how many nanos are in a millisecond

S_TO_NANO

Returns how many nanos are in a second

Traits

Task

Functions

arm_dcache_delete

code_hash

This function returns a u32 containing the program counter of the line of code which invokes this function.

dsb

Data Memory Barrier

err

Use this method to enter a system-wide failure event.

isb

Instruction Synchronization Barrier

pendsv

This method will intiate a pendsv interrupt

wait_exact_ns

This method will wait a certain amount of milliseconds by calculating how many nop commands it will take and issuing them sequentially.

wait_ns

Waits for a specific amount of nanoseconds.