[stm32] perform an automatic ADC calibration to improve the conversion accuracy using function HAL_ADCEx_Calibration_Start().

2. Fix spi/qspi/uspi TX/RX PDMA trigger issue.
3. Drain RX FIFO to remove remain FEF frames in FIFO.
4. Implement RT_DEVICE_CTRL_CLOSE in uart/uuart/scuart driver.

Update SConstruct fix compilation error

attach probe of the oscilloscope too the
3.3v & PWM3 like below:

          jack
    ------|  |---|    |-|    |----
    |o o 3.3v    |eth1| |eth0|
    |o o
    |o o
    |o o PWM3
    |o o

type commands below to rt-thread console:
    msh /> pwm_enable pwm0 3
    msh /> pwm_set pwm0 3 140 90

turn off pwm:
    msh /> pwm_disable pwm0 3
Signed-off-by: NDu Huanpeng <548708880@qq.com>

2.stm32_flash_write函数按byte、half word、word对齐写入，提升写入效率。

Correct format and typo.

Fix rtt port issues.

hardware date format
  year, the same as ctime
  month 1 ~ 12
  no leap second
Signed-off-by: NDu Huanpeng <548708880@qq.com>