在HAL库环境下使用串口2搭建ECB02串口透传，蓝牙端发送过来的int型数据串口2接收，通过串口1打印串口2接收到的数据

实现这个功能的代码如下：

#include "stm32f10x.h"
#include <stdio.h>

#define BUFFER_SIZE 100

void USART1_Init(void);
void USART2_Init(void);
void USART1_SendChar(char ch);
void USART1_SendString(char *str);
void USART2_SendChar(char ch);
void USART2_SendString(char *str);

uint8_t USART1_ReceiveData(void);
uint8_t USART2_ReceiveData(void);

int main(void)
{
    uint8_t buffer[BUFFER_SIZE];
    int i, data;
    
    USART1_Init(); // 初始化串口1
    USART2_Init(); // 初始化串口2
    
    while(1)
    {
        // 从串口2接收数据
        data = USART2_ReceiveData();
        
        // 如果接收到的数据是整型数据
        if(data >= '0' && data <= '9')
        {
            buffer[0] = data;
            i = 1;
            
            // 继续接收后续数据，直到接收到换行符
            while(i < BUFFER_SIZE)
            {
                data = USART2_ReceiveData();
                
                if(data == '\n')
                {
                    buffer[i] = '\0'; // 字符串结尾
                    break;
                }
                
                buffer[i++] = data;
            }
            
            // 打印接收到的数据
            USART1_SendString("Received Data: ");
            USART1_SendString(buffer);
            USART1_SendChar('\n');
        }
    }
}

void USART1_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

    // 使能USART1时钟和GPIOA时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

    // USART1 Tx(PA9)引脚配置
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // USART1 Rx(PA10)引脚配置
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // USART1配置
    USART_InitStructure.USART_BaudRate = 115200;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
    USART_Init(USART1, &USART_InitStructure);

    // 使能USART1
    USART_Cmd(USART1, ENABLE);
}

void USART2_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

    // 使能USART2时钟和GPIOA时钟
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    // USART2 Tx(PA2)引脚配置
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // USART2 Rx(PA3)引脚配置
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // USART2配置
    USART_InitStructure.USART_BaudRate = 9600;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
    USART_Init(USART2, &USART_InitStructure);

    // 使能USART2
    USART_Cmd(USART2, ENABLE);
}

void USART1_SendChar(char ch)
{
    while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);
    USART_SendData(USART1, ch);
}

void USART1_SendString(char *str)
{
    while(*str)
    {
        USART1_SendChar(*str++);
    }
}

void USART2_SendChar(char ch)
{
    while (USART_GetFlagStatus(USART2, USART_FLAG_TC) == RESET);
    USART_SendData(USART2, ch);
}

void USART2_SendString(char *str)
{
    while(*str)
    {
        USART2_SendChar(*str++);
    }
}

uint8_t USART1_ReceiveData(void)
{
    while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
    return USART_ReceiveData(USART1);
}

uint8_t USART2_ReceiveData(void)
{
    while (USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == RESET);
    return USART_ReceiveData(USART2);
}

需要注意的是，本代码使用的是串口1和串口2，如果需要使用其他串口，请根据需要进行修改。同时，本代码中假设接收到的数据都是整型数字，如果接收到其他类型的数据，需要根据具体情况进行处理。