Relationship between gpio_direction_output and gpio_set_value

Gpio_set_value (port_num, 0/1) generally only writes a value on the register of the gpio port. It cannot control whether the port is set to output!

While gpio_direction_output (port_num, 0/1), after a value is written on a gpio port, the port is set to the output mode.

Therefore, some people may suggest removing the gpio_set_value function directly. Is it OK.

Generally, it is recommended that you do not change the Input and Output Modes of a port frequently.

Call gpio_direction_output () first. You can directly use gpio_set_value () to set high and low power consumption in the future. This saves you the trouble of calling the operation that sets the output mode again to improve the running efficiency!