mirror of
https://github.com/google/pebble.git
synced 2025-03-26 05:09:05 +00:00
66 lines
3 KiB
Markdown
66 lines
3 KiB
Markdown
|
---
|
|||
|
|
# Copyright 2025 Google LLC
|
|||
|
|
#
|
|||
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|||
|
|
# you may not use this file except in compliance with the License.
|
|||
|
|
# You may obtain a copy of the License at
|
|||
|
|
#
|
|||
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|||
|
|
#
|
|||
|
|
# Unless required by applicable law or agreed to in writing, software
|
|||
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|||
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|||
|
|
# See the License for the specific language governing permissions and
|
|||
|
|
# limitations under the License.
|
|||
|
|
|
|||
|
|
title: FreeRTOS™ Code Revisions - Background Worker Edition
|
|||
|
|
author: brad
|
|||
|
|
tags:
|
|||
|
|
- Down the Rabbit Hole
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
As part of our commitment to the open source community, Pebble is releasing its
|
|||
|
|
recent modifications to the FreeRTOS project. Pebble has made a few minor
|
|||
|
|
changes to FreeRTOS to enable Background Workers for PebbleOS 2.6 as well as to
|
|||
|
|
make Pebble easier to monitor and debug.
|
|||
|
|
|
|||
|
|
The changes are available [as a tarball](http://assets.getpebble.com.s3-website-us-east-1.amazonaws.com/dev-portal/FreeRTOS-8.0.0-Pebble.2.tar.gz).
|
|||
|
|
|
|||
|
|
Below is a changelog of the modifications since the last time we released our
|
|||
|
|
fork of the FreeRTOS code back in May.
|
|||
|
|
|
|||
|
|
|
|||
|
|
* Added `UBaseType_t uxQueueGetRecursiveCallCount( QueueHandle_t xMutex )
|
|||
|
|
PRIVILEGED_FUNCTION;` to queue.h
|
|||
|
|
* Retrieves the number of times a mutex has been recursively taken
|
|||
|
|
* FreeRTOS always tracked this internally but never made it available
|
|||
|
|
externally
|
|||
|
|
* Used to debug locking relating issues in PebbleOS
|
|||
|
|
|
|||
|
|
* Added `configASSERT_SAFE_TO_CALL_FREERTOS_API();`
|
|||
|
|
* This macro can be used to assert that it is safe to call a FreeRTOS API.
|
|||
|
|
It checks that the caller is not processing an interrupt or in a critical
|
|||
|
|
section.
|
|||
|
|
* See http://www.freertos.org/RTOS-Cortex-M3-M4.html for more details on
|
|||
|
|
how interrupts interact with the FreeRTOS API
|
|||
|
|
* Added `configASSERT_SAFE_TO_CALL_FREERTOS_FROMISR_API();`
|
|||
|
|
* This macro can be used to assert that it is safe to call a FreeRTOS
|
|||
|
|
"FromISR" API. It checks that the caller is at an appropriate interrupt
|
|||
|
|
level.
|
|||
|
|
* See http://www.freertos.org/RTOS-Cortex-M3-M4.html for more details on
|
|||
|
|
how interrupts interact with the FreeRTOS API
|
|||
|
|
* Added `uintptr_t ulTaskGetStackStart( xTaskHandle xTask );` to task.h
|
|||
|
|
* Retrieves the address of the start of the stack space
|
|||
|
|
* Useful for implementing routines which check for available stack space
|
|||
|
|
* Added `bool vPortInCritical( void );` to port.c
|
|||
|
|
* Indicates if we're currently in a FreeRTOS critical section
|
|||
|
|
* Used to implement `configASSERT_SAFE_TO_CALL_FREERTOS_API();`
|
|||
|
|
* Fixed an issue with vPortStoreTaskMPUSettings that occurred when more than
|
|||
|
|
one task wanted to configure MPU regions
|
|||
|
|
* This bug was encountered when adding support for Background Workers in
|
|||
|
|
FW 2.6
|
|||
|
|
|
|||
|
|
Pebble would like to again extend its thanks to FreeRTOS and its community.
|
|||
|
|
We'll be releasing additional updates as we continue to modify FreeRTOS in the
|
|||
|
|
future. If you have any questions, don’t hesitate to [contact us](/contact).
|