if (huart->gState == HAL_UART_STATE_READY),return HAL_BUSY;怎么解决
时间: 2024-04-13 21:28:53 浏览: 34
要解决这个问题,你可以使用一个循环来等待 `HAL_UART_STATE_READY` 状态。在循环中,检查 `huart->gState` 的值,直到它变为 `HAL_UART_STATE_READY`。一旦达到这个状态,你可以返回 `HAL_BUSY`。以下是一个示例代码:
```c
while (huart->gState != HAL_UART_STATE_READY) {
// 等待直到状态变为 HAL_UART_STATE_READY
}
return HAL_BUSY;
```
这段代码会一直循环检查状态,直到状态变为 `HAL_UART_STATE_READY`。一旦达到这个状态,就会跳出循环并返回 `HAL_BUSY`。这样可以确保在状态变为 `HAL_UART_STATE_READY` 之前不会继续执行后面的代码。
相关问题
if (huart->RxState == HAL_UART_STATE_READY)
This line of code checks if the UART receiver state is currently in the "ready" state. If it is, the code can proceed with receiving data through the UART interface. If it is not in the ready state, some other process is likely already using the UART interface, and the code will need to wait until it becomes available again before attempting to receive data.
huart->RxState = HAL_UART_STATE_READY;
This line of code sets the RxState of the UART (Universal Asynchronous Receiver/Transmitter) to the READY state, indicating that the UART is ready to receive data. The HAL (Hardware Abstraction Layer) is a layer of software that abstracts the hardware details of the microcontroller, allowing higher-level software to be written in a more portable and easier-to-understand way. This line is likely part of the initialization code for the UART, which sets up the necessary hardware and software structures to enable the UART to function properly.
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