67 lines
2.7 KiB
Plaintext
67 lines
2.7 KiB
Plaintext
/**
|
|
* @defgroup AVR MegaAVR
|
|
* @{
|
|
* @details AVR port details. This section how the ChibiOS/RT features are
|
|
* implemented on this architecture.
|
|
*
|
|
* @section AVR_STATES Mapping of the System States in the AVR port
|
|
* The ChibiOS/RT logical @ref system_states are mapped as follow in the AVR
|
|
* port:
|
|
* - <b>Init</b>. This state is represented by the startup code and the
|
|
* initialization code before @p chSysInit() is executed. It has not a
|
|
* special hardware state associated.
|
|
* - <b>Normal</b>. This is the state the system has after executing
|
|
* @p chSysInit(). Interrupts are enabled.
|
|
* - <b>Suspended</b>. Interrupts are disabled.
|
|
* - <b>Disabled</b>. Interrupts are enabled. This state is equivalent to the
|
|
* Suspended state because there are no fast interrupts in this architecture.
|
|
* - <b>Sleep</b>. This state is entered with the execution of the specific
|
|
* instruction @p <b>sleep</b>.
|
|
* - <b>S-Locked</b>. Interrupts are disabled.
|
|
* - <b>I-Locked</b>. This state is equivalent to the SRI state, the
|
|
* @p chSysLockI() and @p chSysUnlockI() APIs do nothing (still use them in
|
|
* order to formally change state because this may change).
|
|
* - <b>Serving Regular Interrupt</b>. Normal interrupt service code.
|
|
* - <b>Serving Fast Interrupt</b>. Not present in this architecture.
|
|
* - <b>Serving Non-Maskable Interrupt</b>. Not present in this architecture.
|
|
* - <b>Halted</b>. Implemented as an infinite loop with interrupts disabled.
|
|
*
|
|
* @section AVR_NOTES The AVR port notes
|
|
* - The AVR does not have a dedicated interrupt stack, make sure to reserve
|
|
* enough stack space for interrupts in each thread stack. This can be done
|
|
* by modifying the @p INT_REQUIRED_STACK macro into
|
|
* <b>./ports/AVR/chcore.h</b>.
|
|
*
|
|
* @ingroup Ports
|
|
*/
|
|
/** @} */
|
|
|
|
/**
|
|
* @defgroup AVR_CONF Configuration Options
|
|
* @{
|
|
* @brief AVR Configuration Options.
|
|
* @details The AVR port allows some architecture-specific configurations
|
|
* settingsthat can be specified externally, as example on the compiler
|
|
* command line:
|
|
* - @p INT_REQUIRED_STACK, this value represent the amount of stack space
|
|
* used by the interrupt handlers.<br>
|
|
* The default for this value is @p 32, this space is allocated for each
|
|
* thread so be careful in order to not waste precious RAM space.<br>
|
|
* The default value is set into <b>./ports/AVR/chcore.h</b>.
|
|
*
|
|
* @ingroup AVR
|
|
*/
|
|
/** @} */
|
|
|
|
/**
|
|
* @defgroup AVR_CORE AVR Core Implementation
|
|
* @{
|
|
* @brief AVR specific port code, structures and macros.
|
|
*
|
|
* @ingroup AVR
|
|
* @file ports/AVR/chtypes.h Port types.
|
|
* @file ports/AVR/chcore.h Port related structures and macros.
|
|
* @file ports/AVR/chcore.c Port related code.
|
|
*/
|
|
/** @} */
|