Original
Fork of PCA9547 by
PCA9547.cpp
- Committer:
- okano
- Date:
- 2014-07-01
- Revision:
- 4:3c0af4c37587
- Parent:
- 3:7e884a7805b1
- Child:
- 5:f4f72501148a
- Child:
- 7:995f209b8707
File content as of revision 4:3c0af4c37587:
/** * PCA9547 library * * @author Tedd OKANO * @version 0.1 * @date July-2014 * * PCA9547: an I2C bus multiplexer control library * * PCA9547 is an I2C multiplexer which enables to select 1:8 multiplexed I2C bus. * The multiplexer is useful for deviding I2C bus to avoiding slave address conflict and separating capacitive loads. * * For more information about PCA9547: * http://www.nxp.com/documents/data_sheet/PCA9547.pdf * */ #include "PCA9547.h" PCA9547::PCA9547( PinName sda, PinName scl, char i2c_address ) : i2c( sda, scl ), _i2c_addr( i2c_address ) { // do nothing. // leave it in default state. } PCA9547::~PCA9547() { } void PCA9547::select( char channel ) { char data = 0x08 | channel; i2c.write( _i2c_addr, &data, 1 ); } void PCA9547::disable( void ) { char data = 0x00; i2c.write( _i2c_addr, &data, 1 ); }