99 lines
3.3 KiB
C
99 lines
3.3 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef __ESP_IPC_H__
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#define __ESP_IPC_H__
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#include <esp_err.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef void (*esp_ipc_func_t)(void* arg);
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/**
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* @brief Inter-processor call APIs
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*
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* FreeRTOS provides several APIs which can be used to communicate between
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* different tasks, including tasks running on different CPUs.
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* This module provides additional APIs to run some code on the other CPU.
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*
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* These APIs can only be used when FreeRTOS scheduler is running.
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*/
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/**
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* @brief Initialize inter-processor call module.
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*
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* This function start two tasks, one on each CPU. These tasks are started
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* with high priority. These tasks are normally inactive, waiting until one of
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* the esp_ipc_call_* functions to be used. One of these tasks will be
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* woken up to execute the callback provided to esp_ipc_call_nonblocking or
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* esp_ipc_call_blocking.
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*/
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void esp_ipc_init();
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/**
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* @brief Execute function on the given CPU
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*
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* This will wake a high-priority task on CPU indicated by cpu_id argument,
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* and run func(arg) in the context of that task.
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* This function returns as soon as the high-priority task is woken up.
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* If another IPC call is already being executed, this function will also wait
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* for it to complete.
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*
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* In single-core mode, returns ESP_ERR_INVALID_ARG for cpu_id 1.
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*
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* For complex functions, you may need to increase the stack size of the "IPC task"
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* which runs the function must be sufficient. See the "Inter-Processor Call (IPC)
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* task stack size" setting in menuconfig.
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*
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* @param cpu_id CPU where function should be executed (0 or 1)
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* @param func pointer to a function which should be executed
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* @param arg arbitrary argument to be passed into function
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*
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* @return ESP_ERR_INVALID_ARG if cpu_id is invalid
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* ESP_ERR_INVALID_STATE if FreeRTOS scheduler is not running
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* ESP_OK otherwise
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*/
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esp_err_t esp_ipc_call(uint32_t cpu_id, esp_ipc_func_t func, void* arg);
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/**
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* @brief Execute function on the given CPU and wait for it to finish
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*
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* This will wake a high-priority task on CPU indicated by cpu_id argument,
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* and run func(arg) in the context of that task.
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* This function waits for func to return.
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*
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* In single-core mode, returns ESP_ERR_INVALID_ARG for cpu_id 1.
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*
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* @param cpu_id CPU where function should be executed (0 or 1)
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* @param func pointer to a function which should be executed
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* @param arg arbitrary argument to be passed into function
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*
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* @return ESP_ERR_INVALID_ARG if cpu_id is invalid
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* ESP_ERR_INVALID_STATE if FreeRTOS scheduler is not running
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* ESP_OK otherwise
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*/
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esp_err_t esp_ipc_call_blocking(uint32_t cpu_id, esp_ipc_func_t func, void* arg);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ESP_IPC_H__ */
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