UART_OVERSAMPLING_16;
时间: 2024-06-19 17:04:35 浏览: 368
UART_OVERSAMPLING_16是指串口通信过程中使用的一种采样率,即16倍采样率。在UART通信中,需要对接收到的数据进行采样以确定每个数据位的具体取值,采样率越高,误差就越小,因此,UART_OVERSAMPLING_16采样率更高、精度更高。
在STM32的HAL库中,可以使用UART_OVERSAMPLING_16来设置串口的采样率。其设置方式如下:
```c
huart.Instance = USARTx;
huart.Init.BaudRate = 115200;
huart.Init.WordLength = UART_WORDLENGTH_8B;
huart.Init.StopBits = UART_STOPBITS_1;
huart.Init.Parity = UART_PARITY_NONE;
huart.Init.Mode = UART_MODE_TX_RX;
huart.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart.Init.OverSampling = UART_OVERSAMPLING_16;
```
相关问题
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
`huart1.Init.OverSampling = UART_OVERSAMPLING_16;` 这行代码是在初始化一个名为 `huart1` 的通用异步收发传输(General-Purpose Asynchronous Receiver Transmitter, UART)模块时设置的一个配置项。`OverSampling` 属性通常对应于UART模块的采样率选择。
`UART_OVERSAMPLING_16` 是一个枚举值,表示选择了16倍的采样率。这意味着发送和接收操作会被扩大16倍,这有助于提高信号的质量,减少噪声干扰,并允许处理更宽的频率范围。较高的采样率一般适用于对通信质量要求较高的应用场景,如长距离无线通信或者高精度数据传输。
在实际的STM32Cube库或其他类似库中,这个配置在初始化`UART_HandleTypeDef`结构体时设置,该结构体包含了所有关于UART设备的信息和状态。初始化函数可能类似于下面的样子:
```c
void init_uart1(UART_HandleTypeDef* huart1) {
huart1->Init.BaudRate = YOUR_BAUD_RATE;
huart1->Init.WordLength = UART_WORD_LENGTH_8B;
huart1->Init.StopBits = UART_STOPBITS_1;
huart1->Init.Parity = UART_PARITY_NONE;
huart1->Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1->Init.Mode = UART_MODE_NORMAL;
huart1->Init.Over Sampling = UART_OVERSAMPLING_16; // 设置16位采样率
HAL_UART_Init(huart1); // 执行初始化
}
```
huart2.Init.OverSampling = UART_OVERSAMPLING_16;
This line of code sets the oversampling rate for UART communication on USART2 to 16. Oversampling is a technique used to sample the received data at a higher rate than the baud rate in order to improve the reliability of data transmission. The oversampling rate determines the number of samples taken per bit of data transmitted, with higher oversampling rates resulting in more accurate data reception. In this case, an oversampling rate of 16 means that the UART receiver will take 16 samples per bit of data transmitted.
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