autosar DEM event 冻结帧存储在哪

在 Autosar 中，Event 冻结帧是通过 Diagnostic Event Manager (DEM) 模块来处理的。当一个事件被触发时，DEM 会将相关的数据存储在一个称为 Event 冻结帧的数据结构中。Event 冻结帧包含了事件的相关信息，如事件的状态、事件的参数、事件的时间戳等等。Event 冻结帧在存储时通常会存储在 EEPROM 或者 RAM 中，以便后续的检测和分析。具体存储的位置和方式会根据系统的设计而有所不同。

相关问题

autosar dem event status

The AUTOSAR DEM (Diagnostic Event Manager) provides information about the status of diagnostic events in a vehicle's electronic control unit (ECU). The DEM event status includes several states that indicate the current status of a diagnostic event:

1. Pending: This is the initial state of a diagnostic event. It means that the event has been detected, but the diagnostic process has not yet been completed.

2. Confirmed: This state indicates that the diagnostic process has been completed and the event has been confirmed as valid.

3. Failed: This state indicates that the diagnostic process has been completed and the event has been confirmed as invalid.

4. Pending Storage: This state indicates that the diagnostic event has been detected and is pending storage in non-volatile memory.

5. Confirmed Stored: This state indicates that the diagnostic event has been confirmed as valid and has been stored in non-volatile memory.

6. Failed Stored: This state indicates that the diagnostic event has been confirmed as invalid and has been stored in non-volatile memory.

The DEM event status is used to monitor the health of a vehicle's systems and to provide diagnostic information to technicians and service personnel.

autosar 怎么存储冻结帧

Autosar（AUTomotive Open System ARchitecture）是一种开放的汽车电子系统架构标准，用于在各种汽车电子设备中实现功能模块化和软件标准化。在Autosar标准中，冻结帧是指一种特殊类型的CAN帧，它的数据在发送后将一直保持不变，直到接收方重新请求数据。

在Autosar中，存储冻结帧的主要方法是通过使用冻结帧缓存。冻结帧缓存是一种数据结构，用于存储接收到的冻结帧数据，并在接收方请求时提供该数据。它通常由一个或多个缓冲区组成，每个缓冲区用于存储一个冻结帧的数据。

当一个冻结帧被接收到时，其数据将会被复制到一个可用的缓冲区。每个缓冲区有一个指针，用于标识该缓冲区内的数据是否有效。当接收方请求数据时，它将使用这些指针来获取冻结帧数据。

为了确保数据的一致性和可靠性，Autosar还提供了一些冻结帧缓存管理功能。这些功能包括冻结帧缓存的初始化、更新和清除。通过这些管理功能，Autosar能够有效地存储和提供冻结帧数据。

总之，在Autosar中，使用冻结帧缓存来存储冻结帧数据。通过使用这种方法，可以有效地管理和提供冻结帧数据，以满足汽车电子系统中对数据的冻结和存储需求。