* [tools][musl] add scons --exec-prefix= 用于设置编译工具的前缀

可以通过如下命令在qemu直接调用musl工具链：
scons --exec-path=C:\xxx\arm-linux-musleabi_for_i686-w64-mingw32\bin --exec-prefix=arm-linux-musleabi-

* comment out GenCconfigFile

* 解决部分env变量提前预载之后重载变量的问题

* 1.407/437 uart2 pins change to pd5/pd6. 2.uart and spi drivers support dma

* [bsp/at32] remove #ifndef

* [STM32][SPI]优化APBx时钟配置代码

Signed-off-by: Njaffer <jaffer.work@foxmail.com>

1.顺序修改回V1,保证每次都是当前数据发送完才跳出

* Synchronize the code of the rt mart branch to the master branch.
  * TTY device
  * Add lwP code from rt-smart
  * Add vnode in DFS, but DFS will be re-write for rt-smart
  * There are three libcpu for rt-smart:
    * arm/cortex-a, arm/aarch64
    * riscv64
Co-authored-by: NRbb666 <zhangbingru@rt-thread.com>
Co-authored-by: Nzhkag <zhkag@foxmail.com>

默认为project.xx 与原来保持一致
相关：https://club.rt-thread.org/ask/article/f998b21633f90916.html

* [bsp][lpc55sxx] add support of LPC5528/LPC55S28

1. add .ignore_format
2. add support of LPC55S28
3. fix LPC55S69 keil comiple error
3. refine README

* [bsp][lpc55sxx]

1. remove cmake file
2. formating code using rt-thread formating tools
3. CMSIS folder -> ../

* [bsp][lpc55s69]

 - add IAR support(IAR version: 9.30.1)

Signed-off-by: supperthomas <78900636@qq.com>

update NXP SDK to 2_12_0

[bsp] faster startup for cortex-a

* 添加了硬件spi驱动

If the application defines dozens of global variables,
the speed of clearing the bss segment will be slower.

Because icache can be enabled before the mmu enabled.
Therefore, in order to speed up the process of clearing the BSS segment,
enable icache needs to be put ahead.

* fix bug on spi driver

* [gd32] fix bugs on spi driver

* [armlibc] 修复AC6更新至6.19后_sys_tmpnam()函数编译报错
Co-authored-by: Man, Jianting (Meco) <920369182@qq.com>

目前基本功能已经可以在QEMU上跑起来，但是pthread和内核signal选中会报冲突。先合并一版本，后续解决这些问题。

* 增加 野火 启明6M5 板级支持包

* 修复串口引脚描述错误

* 上一版提交，UART端口改了，但是uart编号漏改
Co-authored-by: NLiuxiequan <liuxiequan@cvte.com>

* 修改ry命令，已便于自定义保存路径

* modified:   components/utilities/ymodem/ry_sy.c

* 修复从被动错误恢复后发送返回异常

* 修复在自动重传模式下,ACK异常阻塞线程
- 删除TX中断函数else分支。仅当RQCP位 置一才进入该中断
- 添加SCE中断函数中关于ACK_ERR的else判断。自动重传模式下会进入该判断,打断自动重传释放完成量。

* 增加对于CAN1与CAN2的SCE中断和TX中断的公共处理函数

* formatting格式化代码

* update struct can_filter_item and rt_can_msg
1. 对过滤器号和索引号结构体定义中同一名称hdr进行重命名hdr_bank和hdr_index,
以便准确区分.采用宏定义兼容以前变量名.
2. 添加接收标识rxfifo,已指明是哪个RXFIFO.

* 更正42M下的波特率

* 修复接收获取索引号错误

* 添加接收标识

* 更新注释

* 取消CANFD限制

* update struct can_filter_item and rt_can_msg