keybrd library is an open source library for creating custom-keyboard firmware.
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- #include "PortRead_PCA9655E.h"
-
- /* begin() is called from Scanner_IOE::begin().
- Configures read pins to input.
- */
- void PortRead_PCA9655E::begin(const uint8_t strobeOn)
- {
- Wire.beginTransmission(port.DEVICE_ADDR);
- Wire.write(port.num + 6); //configuration byte command
- Wire.write(readPins); //0=output (for LED), 1=input (for read)
- Wire.endTransmission();
- }
-
- /* read() returns portState.
- Only portState bits of readPins are valid.
- */
- uint8_t PortRead_PCA9655E::read()
- {
- Wire.beginTransmission(port.DEVICE_ADDR);
- Wire.write(port.num); //input byte command
- Wire.endTransmission(false); //PCA9655E needs false to send a restart
-
- Wire.requestFrom(port.DEVICE_ADDR, 1u); //request one byte from input port
-
- return Wire.read();
- }
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