Crate capsules_core

Modules

• adc
  Syscall driver capsules for ADC sampling.
• alarm
  Tock syscall driver capsule for Alarms, which issue callbacks when a point in time has been reached.
• button
  Provides userspace control of buttons on a board.
• console
  Provides userspace with access to a serial interface.
• console_ordered
  Provides userspace with access to a serial interface whose output is in-order with respect to kernel debug!() operations. Prints to the console are atomic up to particular constant length, which can be set at capsule instantiation.
• driver
  Mapping of capsules to their syscall driver number.
• gpio
  Provides userspace applications with access to GPIO pins.
• i2c_master
  SyscallDriver for an I2C Master interface.
• i2c_master_slave_combo
  Combines two hardware devices into a single I2C master/slave device.
• i2c_master_slave_driver
  Provides both an I2C Master and I2C Slave interface to userspace.
• led
  Provides userspace access to LEDs on a board.
• low_level_debug
  Provides low-level debugging functionality to userspace. The system call interface is documented in doc/syscalls/00008_low_level_debug.md.
• process_console
  Implements a text console over the UART that allows a terminal to inspect and control userspace processes.
• rng
  Library of randomness structures, including a system call driver for userspace applications to request randomness, entropy conversion, entropy to randomness conversion, and synchronous random number generation.
• spi_controller
  Provides userspace applications with the ability to communicate over the SPI bus.
• spi_peripheral
  Provides userspace applications with the ability to communicate over the SPI bus as a peripheral. Only supports chip select 0.
• stream
• test
• virtualizers

Macros

• dec_consume
  The decoding equivalent of enc_consume
• dec_try
  The decoding equivalent of enc_try. The only difference is that only an immutable borrow of the buffer is required each time.
• enc_consume
  This is the aforementioned version of the unwrapping macro that only returns the offset. With this, it can be simpler to programmatically chain multiple headers together when the outputs do not have to be collated.
• enc_try
  Extracts the result of encoding/decoding (the new offset and the output) only if no errors were encountered in encoding. This macro makes it possible to handle offsets easily for the following use cases:
• stream_cond
  Returns an error if a condition is unmet
• stream_done
  Returns the result of encoding/decoding
• stream_err
  Returns an error
• stream_from_option
  Gets the result of an Option<T>, throwing a stream error if it is None
• stream_len_cond
  Returns a buffer length error if there are not enough bytes