* [gcc][armcc][armclang] rtconfig.CROSS_TOOL->rtconfig.PLATFORM

* [stm32f401-nucleo] arduino support
* 增加application arduino main文件
* 调整目录结构

[stm32f072] support Arduino I2C and update readme

- add comments
- remove ARDUINO_PWM_HZ
- remove initVariant blank function
- support DAC0
- improve Kconfig of STM32L475 PANDORA
- add readme
- add i2c1 bus device

删除多余注释，另外确定了对于其他型号单片机的适应性

[bsp/stm32] fix the bug of 'can' being stucked when short cricuit the canH and canL, change some wrong annotations

[stm32F4] adapt 168M frequency of 1M can baud, remember to add the define of BSP_USING_CAN168M in kconfig while using 168M frequency

* [bsp] Make all warnings into errors with qemu-vexpress-a9 qemu-virt64-aarch64 and stm32f411-st-nucleo.
* [RTC] Fix compile errors

* 1、添加基于STM32WLE5JC的BSP
2、修正stm32wlxx的引用

* edit readme

* [stm32] fix h7 uart V2 driver unused code.

* [DeviceDriver][serialv2] fix the serialv2 when using for console device on DMA mode.

* [stm32][art-pi] using serial v2 by default

* [DeviceDriver][SerialV2] Add termios for serial@V2 .

* [BSP][STM32] Add hardware flow control for STM32 serial@V2 driver.

* [DeviceDriver][Serial@V2] Add hardware flow control for serial V2.

* [stm32] fix h7 uart V2 driver unused code.
* [DeviceDriver][serialv2] fix the serialv2 when using for console device on DMA mode.
* [stm32][art-pi] using serial v2 by default

* [stm32][drivers]修复CRC自定义设置不生效的bug

* update format

* [console] fix bug of sdram, configure PA7(DRAM_WE)

* [bsp/stm32] add qspi flash for openmv

* [bsp/stm32] change sram1 to sram2

* [bsp/stm32] add sdio for openmv

* [update] update README.md of openmv

* [ulog] 解决ulog开启时间戳后与libc time以及rtc驱动相关函数干涉的问题
* ulog：当发生递归输出时，后续递归想要输出的内容可能会因为防范递归的判断而无法输出
因此修改输出规则，在发生递归时，采用简单的，无格式的方式直接输出。这样既保证不会发生递归输出，也可以保证递归输出的部分可以正常输出。
* [ulog] size_t->rt_size_t NULL->RT_NULL

* [stm32 pandora] fix the bug when using LCD demo

* arduino 增加内部温度传感器和参考电压通道

* remove ARDUINO_PINOUT_PWM_MAX

* [update] add fal component.

* [update] format code.

* [update] change PKG_USING_FAL to RT_USING_FAL

* [update] format code.

* [update] fal

* [update] delete FAL_SW_VERSION