* delete the bsp of hc32f4a0.

* Add the BSP of HC32 series.

Co-authored-by: Njiangjianbo <jiangjianbo@rt-thread.com>

* [kernel] update comments for rt_thread_suspend

* add the ESP32_C3 first version

* add the blinky ok version

* fix the code

* format file

* add the readme

* fix the formate

* Update README.md

* Update main.c

* fix the readme

* fix rtconfig.h

* remove cpp config

* 硬件驱动（VCOM）：增加获取USB虚拟串口连接状态的接口

在串口不关闭的情况下，更改波特率后，清空上次数据检索，导致更新写入检索错误，
串口无法读出正确的数据。真实数据的位置和检索值之间总有一定的距离，导致读取
数据的时候会有一定的延时。缓冲区大，延时越长

* Disable TRNG function in default configuration.
Co-authored-by: NWayne Lin <wclin@nuvoton.com>

* Add SAML10 Cortex-M23 series support

1. Add SAML10 Cortex-M23 series support; 2. remove STDIO related code of same54 series, no need any more; 3. update rtconfig.py to support output bin & map file containing DEVICE PART info.

* [update] 添加 RA 系列 BSP 开发教程：
  - 添加 RA 系列 BSP 开发教程
  - 添加 ra6m4-iot PPP 上网
  - 整理 驱动文件

* [bsp/renesas] update docs/RA系列BSP制作教程.md

* [restore] Restore to the latest version

* 为n32g45x添加硬件CRC支持

基于stm32的驱动文件进行改造，目前modbus的crc16和mpeg2的crc32测试正常

* [fcntl] create new fcntl.h file for vs

https://www.iar.com/knowledge/learn/programming/using-c-standard-library-time-and-clock-functions/

* bug fixed gpio_mode_set miss gd32_spi->mosi_pin,gd32_spi->sck_pin
* feature,add gd32_spi's alt_func_num member for different spi periph's gpio
* feature,add spi3,spi4,and support multi spi devices
* feature,add rt_hw_spi_device_attach api
* tested on the gd32f450i-eval board

* Decouple the addition of command line arguments

* Decouple the addition of command line arguments

* Modify change logs

* Modify change logs

* Decouple the addition of command line arguments

* delete wrong edits

* Modify file header

* remove duplicate imports