Hello,I have many types of gpio as shown bellow,for my SPI i used gpioModePushPull and gpioModeInput.
And SPI shown me no transmission signal because i didnt put pullup ressistors to the output of gpioModePushPull .
How can i know for what purpose to use what GPIO type?
Thanks.
Wired-or output
Wired-or output with pull-down
Open-drain output
Open-drain output with filter.
Open-drain output with pull-up
Open-drain output using alternate control
And SPI shown me no transmission signal because i didnt put pullup ressistors to the output of gpioModePushPull .
How can i know for what purpose to use what GPIO type?
Thanks.
Wired-or output
Wired-or output with pull-down
Open-drain output
Open-drain output with filter.
Open-drain output with pull-up
Open-drain output using alternate control