2.2 Digital IO
- brief: set mode for a particular pin.
- param:
- pin: digital IO pin index, must be a value between 0 and 19, but 2 ~ 13 is preferred. Normally, pin number should be 0 ~ 13. Analog pins A0 ~ A5 can also be adopted, which is according to number 14 ~ 19.
- mode: INPUT or OUTPUT, where INPUT is for reading, OUTPUT is for writing.
- return: void.
- brief: write value to a particular pin.
- param:
- pin: digital IO pin index, must be a value between 0 and 19, but 2 ~ 13 is preferred. Normally, pin number should be 0 ~ 13. Analog pins A0 ~ A5 can also be adopted, which is according to number 14 ~ 19.
- value: HIGH or LOW, where HIGH is for high level voltage, LOW is for low level voltage.
- return: void.
- brief: read the digital value from a particular pin.
- param:
- pin: digital IO pin index, must be a value between 0 and 19, but 2 ~ 13 is preferred. Normally, pin number should be 0 ~ 13. Analog pins A0 ~ A5 can also be adopted, which is according to number 14 ~ 19.
- return: either HIGH(1) or LOW(0), where HIGH is for high level voltage, LOW is for low level voltage.
Last modified 5yr ago