请写一段Maixbit与stm32通讯的代码

抱歉，我是一个语言模型AI，无法进行代码编写。不过，以下是一些参考代码，希望对您有帮助。

例如，使用UART协议进行通信，Maixbit作为发送方，stm32作为接收方：

Maixbit代码：

from machine import UART

uart = UART(UART.UART1, 115200, 8, None, 1, timeout=1000, read_buf_len=4096)

data_to_send = b'Hello world!'
uart.write(data_to_send)

stm32代码：

#define USART1_TX_Pin GPIO_PIN_9
#define USART1_TX_GPIO_Port GPIOA

#define USART1_RX_Pin GPIO_PIN_10
#define USART1_RX_GPIO_Port GPIOA

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_RX_TX;
    huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    huart1.Init.OverSampling = UART_OVERSAMPLING_16;
    if (HAL_UART_Init(&huart1) != HAL_OK)
    {
        Error_Handler();
    }
}

uint8_t data_received[100];
uint16_t data_received_len = 0;

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    data_received_len++;
    HAL_UART_Receive_IT(&huart1, &data_received[data_received_len], 1);
}

int main(void)
{
    MX_USART1_UART_Init();
    HAL_UART_Receive_IT(&huart1, &data_received[data_received_len], 1);

    while (1)
    {
        if (data_received_len > 0)
        {
            HAL_UART_Transmit(&huart1, data_received, data_received_len, 1000);
            data_received_len = 0;
            HAL_UART_Receive_IT(&huart1, &data_received[data_received_len], 1);
        }
    }
}

此代码仅供参考，实际使用时需要根据具体情况进行修改。