NUCLEO-G474REHAL怎么驱动esp8266的代码
时间: 2024-02-28 18:57:14 浏览: 125
要在NUCLEO-G474REHAL上驱动ESP8266,您需要使用USART串口通信。以下是使用STM32CubeIDE编写的示例代码,可以帮助您开始编写您的应用程序。
首先,您需要初始化USART串口,可以使用如下代码:
```
/* Definition for USART1 GPIO pins (PA9, PA10) */
#define USART_TX_PIN GPIO_PIN_9
#define USART_TX_GPIO_PORT GPIOA
#define USART_RX_PIN GPIO_PIN_10
#define USART_RX_GPIO_PORT GPIOA
/* Definition for USARTx's NVIC */
#define USARTx_IRQn USART1_IRQn
#define USARTx_IRQHandler USART1_IRQHandler
UART_HandleTypeDef huart1;
void MX_USART1_UART_Init(void)
{
huart1.Instance = USART1;
huart1.Init.BaudRate = 115200;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
}
void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(uartHandle->Instance==USART1)
{
/* USART1 clock enable */
__HAL_RCC_USART1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**USART1 GPIO Configuration
PA9 ------> USART1_TX
PA10 ------> USART1_RX
*/
GPIO_InitStruct.Pin = USART_TX_PIN|USART_RX_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USART1 interrupt Init */
HAL_NVIC_SetPriority(USARTx_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USARTx_IRQn);
}
}
void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{
if(uartHandle->Instance==USART1)
{
/* Peripheral clock disable */
__HAL_RCC_USART1_CLK_DISABLE();
/**USART1 GPIO Configuration
PA9 ------> USART1_TX
PA10 ------> USART1_RX
*/
HAL_GPIO_DeInit(GPIOA, USART_TX_PIN|USART_RX_PIN);
/* USART1 interrupt Deinit */
HAL_NVIC_DisableIRQ(USARTx_IRQn);
}
}
```
接下来,您需要编写一个函数来发送AT指令并接收ESP8266的响应,例如:
```
#define ESP8266_USART &huart1
void ESP8266_SendATCommand(const char* cmd, char* response, uint32_t timeout)
{
HAL_UART_Transmit(ESP8266_USART, (uint8_t*)cmd, strlen(cmd), timeout);
HAL_UART_Receive(ESP8266_USART, (uint8_t*)response, 1024, timeout);
}
```
最后,您可以编写您的应用程序,例如:
```
int main(void)
{
char response[1024];
/* USART1 init function */
MX_USART1_UART_Init();
/* Send AT command */
ESP8266_SendATCommand("AT\r\n", response, 1000);
/* Print response */
printf("%s", response);
while (1)
{
}
}
```
当然,这只是一个简单的示例,您需要根据您的具体应用程序进行修改。
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