as+output+driving+an+unspecified+signal
时间: 2023-12-14 10:33:02 浏览: 31
以下是关于"as output driving an unspecified signal"的介绍:
这是一种电子元器件的引脚类型,指的是该引脚可以作为输出引脚,并且可以驱动任意信号。具体来说,当该引脚被设置为输出模式时,它可以输出一个电压信号,这个信号的具体形式可以由用户自行定义。例如,用户可以将该引脚连接到一个LED灯上,以便控制LED灯的亮灭。
在使用这种引脚时,需要注意以下几点:
1. 确保该引脚的输出电压范围符合被驱动信号的要求。
2. 确保该引脚的输出电流足够驱动被连接的负载。
3. 确保该引脚的输出电压和电流不会超过元器件的最大额定值,以免损坏元器件。
相关问题
springboot+application.yml+pgsql数据库表大小写不敏感
在Spring Boot中,可以通过在application.yml文件中设置数据库连接字符串来实现数据库表名的大小写不敏感。以PostgreSQL为例,您可以在application.yml文件中添加以下内容:
```
spring:
datasource:
url: jdbc:postgresql://localhost:5432/my_database?currentSchema=public&stringtype=unspecified&searchpath=public&reWriteBatchedInserts=true
driverClassName: org.postgresql.Driver
username: username
password: password
hikari:
poolName: HikariCP
minimumIdle: 5
maximumPoolSize: 20
idleTimeout: 30000
connectionTestQuery: SELECT 1
connectionTimeout: 30000
maxLifetime: 1800000
jpa:
show-sql: true
properties:
hibernate:
dialect: org.hibernate.dialect.PostgreSQLDialect
jdbc:
lob:
non_contextual_creation: true
naming:
physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
```
在该连接字符串中,我们没有指定任何特殊的参数来实现表名的大小写不敏感。这是因为PostgreSQL默认情况下是区分大小写的。但是,我们可以使用Hibernate的物理命名策略来强制表名不区分大小写,如上所示。请注意,该配置仅适用于JPA/Hibernate。如果您使用的是其他数据访问层框架,可能需要采取不同的方法来设置表名的大小写规则。
an empty initializer is invalid for an array with unspecified bound
This error message is indicating that you have declared an array without specifying its size (also known as its bound), but you have also tried to initialize it with no elements.
For example, if you declare an array like this:
```
int myArray[];
```
you are not specifying its size, which means the compiler doesn't know how much memory to allocate for it. Then, if you try to initialize it like this:
```
int myArray[] = {};
```
you are essentially trying to declare an array with unspecified size and no elements, which is not allowed.
To fix this error, you need to either specify the size of the array when you declare it, or provide some initial elements in the initializer. For example:
```
int myArray[5]; // specifies the size of the array as 5
int myArray[] = {1, 2, 3}; // initializes the array with 3 elements
```