GPIO Driver (Not Implemented)
Macros
Output enable
-
gpio_enable_output(port, pin)
Initialize a GPIO pin to be used as digital output.
- Parameters
port – MCU port, a letter e.g. A, B
pin – Pin number
Input enable
-
gpio_enable_input(port, pin)
Initialize a GPIO pin to be used as digital input.
- Parameters
port – MCU port, a letter e.g. A, B
pin – Pin number
Set output value
-
gpio_set_output(port, pin, value)
Set a GPIO digital output pin to output a value.
- Parameters
port – MCU port, a letter e.g. A, B
pin – Pin number
value – Value to be set
Read input value
-
gpio_get_input(port, pin)
Read digital input from a pin.
- Parameters
port – MCU port, a letter e.g. A, B
pin – Pin number
Why Macros
We want to pass which pin we are operating on without performance penalty. If we use a macro, it can just take for example A,3 as a parameter and use it to generate C register write to the register.