# uart001双串口互传

**Repository Path**: zhiOS/uart001

## Basic Information

- **Project Name**: uart001双串口互传
- **Description**: 实现两个串口数据互传，支持数据透传；
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 1
- **Forks**: 0
- **Created**: 2026-07-30
- **Last Updated**: 2026-08-03

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# UART001 - Modbus UART Implementation for STM32F1xx

This project is a Modbus communication protocol implementation based on the STM32F1xx microcontroller, achieving master-slave communication through the UART interface.

## Functional Features

- **Dual UART Interfaces**: Supports USART1 and USART2 dual serial port communication
- **Modbus Protocol**: Complete Modbus protocol implementation
- **Precise Delay**: Microsecond-level (Delay_us) and millisecond-level (Delay_ms) delay functions
- **DMA Support**: Supports UART DMA transmission, improving communication efficiency
- **Interrupt Handling**: Robust interrupt callback handling mechanism

## Hardware Requirements

- STM32F1xx series microcontroller
- Two UART interfaces (USART1, USART2)
- One timer (TIM3)
- Necessary GPIO pin configuration

## Software Architecture

### Core Components

| File | Function Description |
|------|---------|
| `Core/Src/main.c` | Main program entry, containing system initialization and main loop |
| `Core/Src/stm32f1xx_it.c` | Interrupt handler functions |
| `Core/Src/stm32f1xx_hal_msp.c` | HAL library low-level driver initialization |
| `Core/Src/system_stm32f1xx.c` | System clock configuration |

### Main Function Functions

- `SystemClock_Config()` - System clock configuration
- `MX_USART1_UART_Init()` - USART1 initialization
- `MX_USART2_UART_Init()` - USART2 initialization  
- `MX_TIM3_Init()` - Timer 3 initialization
- `MX_GPIO_Init()` - GPIO initialization
- `Delay_us()` - Microsecond delay
- `Delay_ms()` - Millisecond delay

## Usage Instructions

### Compilation and Flashing

1. Open the project using STM32CubeIDE or Keil MDK
2. Configure the build toolchain
3. Compile and flash to the target hardware

### Serial Configuration

Default serial parameters:
- Baud Rate: Configurable
- Data Bits: 8 bits
- Stop Bits: 1 bit
- Parity: None

### Modbus Communication

Modbus communication is managed via the `UartModbusStruct` structure, using the `ModbusCommand` variable to send and receive Modbus command frames.

## Dependencies

- STM32CubeF1 Firmware Library
- CMSIS Core Library
- HAL Driver Library

## Directory Structure

```
├── Core/
│   ├── Inc/           # Header file directory
│   │   ├── main.h
│   │   ├── stm32f1xx_hal_conf.h
│   │   └── stm32f1xx_it.h
│   └── Src/           # Source file directory
│       ├── main.c
│       ├── stm32f1xx_hal_msp.c
│       ├── stm32f1xx_it.c
│       └── system_stm32f1xx.c
├── Drivers/           # Driver libraries
│   ├── CMSIS/        # CMSIS Core library
│   └── STM32F1xx_HAL_Driver/  # HAL Driver
└── .gitignore        # Git ignore configuration
```

## License

This project follows an open-source agreement; please refer to the project source code for specific license information.