【English readme】 [stm32][L433] add english readme
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# NUCLEO-L433RC-P 开发板 BSP 说明
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# STM32L433-Nucleo BSP Introduction
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## 简介
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[中文](README_zh.md)
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本文档为ST官方 NUCLEO-L433RC-P 开发板的 BSP (板级支持包) 说明。
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## MCU: STM32L433RC @80MHz, 256KB FLASH, 64KB RAM
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主要内容如下：
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The STM32L433xx devices are the ultra-low-power microcontrollers based on the high-performance Arm® Cortex®-M4 32-bit RISC core operating at a frequency of up to 80 MHz. The Cortex-M4 core features a Floating point unit (FPU) single precision which supports all Arm® single-precision data-processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit (MPU) which enhances application security.
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- 开发板资源介绍
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- BSP 快速上手
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- 进阶使用方法
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The STM32L433xx devices embed high-speed memories (Flash memory up to 256 Kbyte, 64 Kbyte of SRAM), a Quad SPI flash memories interface (available on all packages) and an extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix.
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The STM32L433xx devices embed several protection mechanisms for embedded Flash memory and SRAM: readout protection, write protection, proprietary code readout protection and Firewall.
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The devices offer a fast 12-bit ADC (5 Msps), two comparators, one operational amplifier, two DAC channels, an internal voltage reference buffer, a low-power RTC, one general-purpose 32-bit timer, one 16-bit PWM timer dedicated to motor control, four general-purpose 16-bit timers, and two 16-bit low-power timers.
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In addition, up to 21 capacitive sensing channels are available. The devices also embed an integrated LCD driver 8x40 or 4x44, with internal step-up converter.
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They also feature standard and advanced communication interfaces.
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The STM32L433xx operates in the -40 to +85 °C (+105 °C junction), -40 to +105 °C (+125 °C junction) and -40 to +125 °C (+130 °C junction) temperature ranges from a 1.71 to 3.6 V VDD power supply when using internal LDO regulator and a 1.05 to 1.32V VDD12 power supply when using external SMPS supply. A comprehensive set of power-saving modes allows the design of low-power applications.
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Some independent power supplies are supported: analog independent supply input for ADC, DAC, OPAMP and comparators, and 3.3 V dedicated supply input for USB. A VBAT input allows to backup the RTC and backup registers. Dedicated VDD12 power supplies can be used to bypass the internal LDO regulator when connected to an external SMPS.
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The STM32L433xx family offers eight packages from 48 to 100-pin packages.
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通过阅读快速上手章节开发者可以快速地上手该 BSP，将 RT-Thread 运行在开发板上。在进阶使用指南章节，将会介绍更多高级功能，帮助开发者利用 RT-Thread 驱动更多板载资源。
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#### KEY FEATURES
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## 开发板介绍
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- Ultra-low-power with FlexPowerControl
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- 1.71 V to 3.6 V power supply
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- -40 °C to 85/105/125 °C temperature range
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- 200 nA in VBAT mode: supply for RTC and 32x32-bit backup registers
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- 8 nA Shutdown mode (5 wakeup pins)
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- 28 nA Standby mode (5 wakeup pins)
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- 280 nA Standby mode with RTC
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- 1.0 μA Stop 2 mode, 1.28 μA with RTC
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- 84 μA/MHz run mode (LDO Mode)
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- 36 μA/MHz run mode (@3.3 V SMPS Mode)
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- Batch acquisition mode (BAM)
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- 4 μs wakeup from Stop mode
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- Brown out reset (BOR)
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- Interconnect matrix
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- Core: Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait-state execution from Flash memory, frequency up to 80 MHz, MPU, 100DMIPS and DSP instructions
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- Performance benchmark
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- 1.25 DMIPS/MHz (Drystone 2.1)
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- 273.55 CoreMark® (3.42 CoreMark/MHz @ 80 MHz)
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- Energy benchmark
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- 253 ULPBench® score
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- Clock Sources
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- 4 to 48 MHz crystal oscillator
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- 32 kHz crystal oscillator for RTC (LSE)
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- Internal 16 MHz factory-trimmed RC (±1%)
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- Internal low-power 32 kHz RC (±5%)
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- Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than ±0.25 % accuracy)
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- Internal 48 MHz with clock recovery
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- 2 PLLs for system clock, USB, audio, ADC
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- Up to 83 fast I/Os, most 5 V-tolerant
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- RTC with HW calendar, alarms and calibration
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- LCD 8× 40 or 4× 44 with step-up converter
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- Up to 21 capacitive sensing channels: support touchkey, linear and rotary touch sensors
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对于 NUCLEO-L433RC-P，内核是 Cortex-M4，绿色的 Nucleo 标志显示了这款芯片是低功耗系列，板载 ST-LINK/V2-1 调试器/编程器，迷你尺寸，mirco USB 接口，可数的外设，Arduino™ nano 兼容的接口。
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开发板外观如下图所示：
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该开发板常用 **板载资源** 如下：
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- MCU：STM32L433RC，主频 80MHz，256KB FLASH ，64KB RAM。
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- 常用外设
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- LED：4个，USB communication(LD1 双色)，USB overcurrent(LD2 红色)，power LED(LD3 绿色)，user LED(LD4 绿色)
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- 按键：2 个，USER and RESET 。
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- 常用接口：USB 转串口、Arduino Uno 和 ST morpho 两类扩展接口
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- 调试接口：板载 ST-LINK/V2-1 调试器。
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快速入门：[STM32 Nucleo板软件开发工具入门](https://www.st.com/resource/zh/user_manual/dm00105928-getting-started-with-stm32-nucleo-board-software-development-tools-stmicroelectronics.pdf)
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原理图下载：[NUCLEO-L433RC-P schematic](https://www.st.com/resource/en/schematic_pack/nucleo-l433rc-p_sch.zip)
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开发板更多详细信息请参考【STMicroelectronics】 [NUCLEO-L433RC-P](https://www.st.com/content/st_com/zh/products/evaluation-tools/product-evaluation-tools/mcu-mpu-eval-tools/stm32-mcu-mpu-eval-tools/stm32-nucleo-boards/nucleo-l433rc-p.html)。
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## 外设支持
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本 BSP 目前对外设的支持情况如下：
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| **片上外设** | **支持情况** | **备注** |
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| :----------------- | :----------: | :------------------------------------ |
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| GPIO | 支持 | PA0, PA1... PH1 ---> PIN: 0, 1...63 |
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| UART | 支持 | UART1, UART2 |
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| SPI | 支持 | SPI1 |
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| RTC | 支持 | 支持外部晶振和内部低速时钟 |
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- 11x timers: 1x 16-bit advanced motor-control, 1x 32-bit and 2x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer
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- Memories
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- Up to 256 KB single bank Flash, proprietary code readout protection
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- 64 KB of SRAM including 16 KB with hardware parity check
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- Quad SPI memory interface
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- Rich analog peripherals (independent supply)
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- 1x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 μA/Msps
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- 2x 12-bit DAC output channels, low-power sample and hold
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- 1x operational amplifier with built-in PGA
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- 2x ultra-low-power comparators
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- 17x communication interfaces
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- USB 2.0 full-speed crystal less solution with LPM and BCD
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- 1x SAI (serial audio interface)
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- 3x I2C FM+(1 Mbit/s), SMBus/PMBus
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- 4x USARTs (ISO 7816, LIN, IrDA, modem)
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- 1x LPUART (Stop 2 wake-up)
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- 3x SPIs (and 1x Quad SPI)
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- CAN (2.0B Active) and SDMMC interface
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- SWPMI single wire protocol master I/F
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- IRTIM (Infrared interface)
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- 14-channel DMA controller
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- True random number generator
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- CRC calculation unit, 96-bit unique ID
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- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
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- All packages are ECOPACK2® compliant
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## 使用说明
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使用说明分为如下两个章节：
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## Read more
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- 快速上手
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本章节是为刚接触 RT-Thread 的新手准备的使用说明，遵循简单的步骤即可将 RT-Thread 操作系统运行在该开发板上，看到实验效果 。
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- 进阶使用
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本章节是为需要在 RT-Thread 操作系统上使用更多开发板资源的开发者准备的。通过使用 ENV 工具对 BSP 进行配置，可以开启更多板载资源，实现更多高级功能。
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| Documents | Description |
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| :----------------------------------------------------------: | :----------------------------------------------------------: |
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| [STM32_Nucleo-64_BSP_Introduction](../docs/STM32_Nucleo-64_BSP_Introduction.md) | How to run RT-Thread on STM32 Nucleo-64 boards (**Must-Read**) |
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| [STM32L433RC ST Official Website](https://www.st.com/en/microcontrollers-microprocessors/stm32l433rc.html#documentation) | STM32L433RC datasheet and other resources |
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### 快速上手
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本 BSP 为开发者提供 MDK5 和 IAR 工程，并且支持 GCC 开发环境。下面以 MDK5 开发环境为例，介绍如何将系统运行起来。
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## Maintained By
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#### 硬件连接
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[Sunwancn](https://github.com/Sunwancn), <bwsheng2000@163.com>
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使用数据线连接开发板到 PC，打开电源开关。
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#### 编译下载
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双击 project.uvprojx 文件，打开 MDK5 工程，编译并下载程序到开发板。
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## Translated By
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> 工程默认配置使用 ST-LINK 仿真器下载程序，在通过 microUSB 连接开发板的基础上，点击下载按钮即可下载程序到开发板
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Meco Man @ RT-Thread Community
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#### 运行结果
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下载程序成功之后，系统会自动运行，观察开发板上 LED 的运行效果，红色 LD1 和 绿色 LD3 常亮、绿色 LD4 会周期性闪烁。
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USB 虚拟 COM 端口默认连接串口 2，在终端工具里打开相应的串口（115200-8-1-N），复位设备后，可以看到 RT-Thread 的输出信息:
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```bash
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\ | /
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- RT - Thread Operating System
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/ | \ 4.0.0 build Jan 9 2019
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2006 - 2018 Copyright by rt-thread team
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msh >
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```
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### 进阶使用
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此 BSP 默认只开启了 GPIO 和 串口2 的功能，如果需使用更多高级功能，需要利用 ENV 工具对 BSP 进行配置，步骤如下：
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1. 在 bsp 下打开 env 工具。
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2. 输入`menuconfig`命令配置工程，配置好之后保存退出。
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3. 输入`pkgs --update`命令更新软件包。
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4. 输入`scons --target=mdk4/mdk5/iar` 命令重新生成工程。
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本章节更多详细的介绍请参考 [STM32 系列 BSP 外设驱动使用教程](../docs/STM32系列BSP外设驱动使用教程.md)。
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## 注意事项
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- 开机时如果不能打印 RT-Thread 版本信息，请将BSP中串口 GPIO 速率调低
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- 开机时如果不能打印 RT-Thread 版本信息，请重新选择 PC 端串口调试软件的串口号
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## 联系人信息
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维护人:
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- [Sunwancn](https://github.com/Sunwancn), 邮箱：<bwsheng2000@163.com>
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> jiantingman@foxmail.com
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>
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> https://github.com/mysterywolf
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@ -0,0 +1,113 @@
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# NUCLEO-L433RC 开发板 BSP 说明
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## 简介
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本文档为ST官方 NUCLEO-L433RC 开发板的 BSP (板级支持包) 说明。
|
||||
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主要内容如下：
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- 开发板资源介绍
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- BSP 快速上手
|
||||
- 进阶使用方法
|
||||
|
||||
通过阅读快速上手章节开发者可以快速地上手该 BSP，将 RT-Thread 运行在开发板上。在进阶使用指南章节，将会介绍更多高级功能，帮助开发者利用 RT-Thread 驱动更多板载资源。
|
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## 开发板介绍
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||||
|
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对于 NUCLEO-L433RC，内核是 Cortex-M4，绿色的 Nucleo 标志显示了这款芯片是低功耗系列，板载 ST-LINK/V2-1 调试器/编程器，迷你尺寸，mirco USB 接口，可数的外设，Arduino™ nano 兼容的接口。
|
||||
|
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开发板外观如下图所示：
|
||||
|
||||
|
||||
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该开发板常用 **板载资源** 如下：
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- MCU：STM32L433RC，主频 80MHz，256KB FLASH ，64KB RAM。
|
||||
- 常用外设
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- LED：4个，USB communication(LD1 双色)，USB overcurrent(LD2 红色)，power LED(LD3 绿色)，user LED(LD4 绿色)
|
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- 按键：2 个，USER and RESET 。
|
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- 常用接口：USB 转串口、Arduino Uno 和 ST morpho 两类扩展接口
|
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- 调试接口：板载 ST-LINK/V2-1 调试器。
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快速入门：[STM32 Nucleo板软件开发工具入门](https://www.st.com/resource/zh/user_manual/dm00105928-getting-started-with-stm32-nucleo-board-software-development-tools-stmicroelectronics.pdf)
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原理图下载：[NUCLEO-L433RC-P schematic](https://www.st.com/resource/en/schematic_pack/nucleo-l433rc-p_sch.zip)
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开发板更多详细信息请参考【STMicroelectronics】 [NUCLEO-L433RC-P](https://www.st.com/content/st_com/zh/products/evaluation-tools/product-evaluation-tools/mcu-mpu-eval-tools/stm32-mcu-mpu-eval-tools/stm32-nucleo-boards/nucleo-l433rc-p.html)。
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## 外设支持
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本 BSP 目前对外设的支持情况如下：
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| **片上外设** | **支持情况** | **备注** |
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| :----------------- | :----------: | :------------------------------------ |
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| GPIO | 支持 | PA0, PA1... PH1 ---> PIN: 0, 1...63 |
|
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| UART | 支持 | UART1, UART2 |
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| SPI | 支持 | SPI1 |
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| RTC | 支持 | 支持外部晶振和内部低速时钟 |
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## 使用说明
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使用说明分为如下两个章节：
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|
||||
- 快速上手
|
||||
|
||||
本章节是为刚接触 RT-Thread 的新手准备的使用说明，遵循简单的步骤即可将 RT-Thread 操作系统运行在该开发板上，看到实验效果 。
|
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|
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- 进阶使用
|
||||
|
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本章节是为需要在 RT-Thread 操作系统上使用更多开发板资源的开发者准备的。通过使用 ENV 工具对 BSP 进行配置，可以开启更多板载资源，实现更多高级功能。
|
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|
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|
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### 快速上手
|
||||
|
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本 BSP 为开发者提供 MDK5 和 IAR 工程，并且支持 GCC 开发环境。下面以 MDK5 开发环境为例，介绍如何将系统运行起来。
|
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#### 硬件连接
|
||||
|
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使用数据线连接开发板到 PC，打开电源开关。
|
||||
|
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#### 编译下载
|
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|
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双击 project.uvprojx 文件，打开 MDK5 工程，编译并下载程序到开发板。
|
||||
|
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> 工程默认配置使用 ST-LINK 仿真器下载程序，在通过 microUSB 连接开发板的基础上，点击下载按钮即可下载程序到开发板
|
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|
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#### 运行结果
|
||||
|
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下载程序成功之后，系统会自动运行，观察开发板上 LED 的运行效果，红色 LD1 和 绿色 LD3 常亮、绿色 LD4 会周期性闪烁。
|
||||
|
||||
USB 虚拟 COM 端口默认连接串口 2，在终端工具里打开相应的串口（115200-8-1-N），复位设备后，可以看到 RT-Thread 的输出信息:
|
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|
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```bash
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\ | /
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||||
- RT - Thread Operating System
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/ | \ 4.0.0 build Jan 9 2019
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2006 - 2018 Copyright by rt-thread team
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msh >
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```
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### 进阶使用
|
||||
|
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此 BSP 默认只开启了 GPIO 和 串口2 的功能，如果需使用更多高级功能，需要利用 ENV 工具对 BSP 进行配置，步骤如下：
|
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|
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1. 在 bsp 下打开 env 工具。
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2. 输入`menuconfig`命令配置工程，配置好之后保存退出。
|
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3. 输入`pkgs --update`命令更新软件包。
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4. 输入`scons --target=mdk4/mdk5/iar` 命令重新生成工程。
|
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本章节更多详细的介绍请参考 [STM32 系列 BSP 外设驱动使用教程](../docs/STM32系列BSP外设驱动使用教程.md)。
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## 注意事项
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- 开机时如果不能打印 RT-Thread 版本信息，请将BSP中串口 GPIO 速率调低
|
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- 开机时如果不能打印 RT-Thread 版本信息，请重新选择 PC 端串口调试软件的串口号
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## 联系人信息
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维护人:
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||||
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- [Sunwancn](https://github.com/Sunwancn), 邮箱：<bwsheng2000@163.com>
|
||||
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