mirror of
https://github.com/google/pebble
synced 2026-10-16 16:24:12 +02:00
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/*
|
|
* Copyright 2024 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.
|
|
*/
|
|
|
|
#include "FreeRTOS.h"
|
|
#include "task.h"
|
|
|
|
#include "mcu/interrupts.h"
|
|
|
|
extern uint32_t __isr_stack_start__[];
|
|
|
|
uint32_t stack_free_bytes(void) {
|
|
|
|
// Get the current SP
|
|
register uint32_t SP __asm ("sp");
|
|
uint32_t cur_sp = SP;
|
|
|
|
// Default stack
|
|
uint32_t start = (uint32_t) __isr_stack_start__;
|
|
|
|
// On ISR stack?
|
|
if (!mcu_state_is_isr()) {
|
|
TaskHandle_t task_handle = xTaskGetCurrentTaskHandle();
|
|
if (task_handle != NULL) {
|
|
// task_handle is NULL before we start the first task
|
|
start = (uint32_t)ulTaskGetStackStart(task_handle);
|
|
}
|
|
}
|
|
|
|
return cur_sp - start;
|
|
}
|