If device IO has multiple drive method, configure it for change output power or voltage.
By default, obniz choose "Most powerful push-pull" for output. use io.drive() to change drive method. Call it before call output(). But you can call io.drive() while output.
// Javascript Example
obniz.io0.pull("5v");
obniz.io0.drive("open-drain");
obniz.io0.output(true); // output open-drain with 5v pull-up
Drive Method List
See drive methods on each device detail.
Below is obniz Board Series drive methods.
| drive() argument | Drive method and Voltage | Max Current | Maximum Frequency | Detail |
|---|---|---|---|---|
5v |
push-pull 5v | 1A | <=250khz(Recommend) | Default. Over-current Over-heating protection |
3v |
push-pull 3v | 1mA(Recommend) | <=80Mhz | Best effort over-current protection |
open-drain |
open-drain <=5v | 1mA(Recommend) | <=80Mhz |
Push Pull
Standard output method. It output VCC voltage when true. GND(0v) for false.
Open Drain
When false, same as push-pull. When true, IO changed to High Impedance. This is used for bi-directional communication or different voltage communication.