Instructions for Jerry's reset IO maintenance level [chapter]

1、 Set before reset IO state

Note that some packages are too IO Tied together inside , You need to set another IO High resistance mode , Such as PB8 High resistance ：

gpio_set_die(IO_PORTB_08, 0);
gpio_set_pull_up(IO_PORTB_08, 0);
gpio_set_pull_down(IO_PORTB_08, 0);
gpio_direction_input(IO_PORTB_08);
If there is no external pull-up resistor in the hardware, use the internal pull-up resistor

External hardware pull-down , You need to turn off the internal up and down

The hardware does not pull up or down , Use the internal pull-down menu ： According to the output 1 Open, pull up, close and pull down , Output 0 Close and pull down

Such as ： Use an internal pull-up resistor , Output 1,

gpio_latch_en(IO_PORTC_00,0);// Release first IO
gpio_direction_output(IO_PORTC_00, 1);// Set output
gpio_set_pull_up(IO_PORTC_00, 1)// Open and pull ,0 Then close and pull
gpio_set_pull_down(IO_PORTC_00, 0);// Turn off the pull-down ,1 Then open and pull
gpio_latch_en(IO_PORTC_00,1);// Lock the IO