W806 development board experience

In my hand is a HLK-W806-KIT-V1.0 The board of , All kinds of schematic diagrams can't find sweat , Only on the official website HLK-W806-KIT-V1.1, The crystal oscillator used for the board may be commercial , I put it in -10 Du can't get up , Summarize several problems encountered

1、 Schematic cannot be found , Taobao and Tiktok customer service did not find

2、 All kinds of press reset at low temperature can't get up

3、 Place the board for a period of time , The first power on system doesn't work , Just turn off the power and turn it on

4、 There is a problem with the screen printing of the board PA2 Silk screen printing is PA3

The problem is summarized , Let's talk about his advantages , cheap , The main frequency is high ,RAM Big ,FLASH Big , It is also very convenient to download programs directly through serial port for debugging ,IO The reverse speed is not STMF103 fast

W806 Output IO Reverse speed

while(1)
{
	GPIOA->DATA &= ~GPIO_PIN_8;
	GPIOA->DATA |= GPIO_PIN_8;
}

STM32F103  Direct use of library function inversion

W806 You can also read more than one at a time IO

buffer[jpeglen++]=GPIOA->DATA&0x00FF;