Tedd OKANO / Mbed 2 deprecated PCA9546A_Hello

Hello program for PCA9546A component library. The PCA9546A is a quad bidirectional translating switch controlled via the I2C-bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register.

Dependencies:   LM75B PCA9546A mbed

main.cpp@0:c88a1756cfd3, 2015-02-23 (annotated)

Committer:
okano
Date:
Mon Feb 23 06:07:56 2015 +0000
Revision:
0:c88a1756cfd3
initial version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
okano 0:c88a1756cfd3 1 /**
okano 0:c88a1756cfd3 2 * PCA9546A library "Hello world" sample
okano 0:c88a1756cfd3 3 *
okano 0:c88a1756cfd3 4 * @author Tedd OKANO
okano 0:c88a1756cfd3 5 * @version 0.1
okano 0:c88a1756cfd3 6 * @date Feb-2015
okano 0:c88a1756cfd3 7 *
okano 0:c88a1756cfd3 8 * PCA9546A: an I2C bus switch control library
okano 0:c88a1756cfd3 9 *
okano 0:c88a1756cfd3 10 * The PCA9546A is a quad bidirectional translating switch controlled
okano 0:c88a1756cfd3 11 * via the I2C-bus. The SCL/SDA upstream pair fans out to four downstream
okano 0:c88a1756cfd3 12 * pairs, or channels. Any individual SCx/SDx channel or combination of
okano 0:c88a1756cfd3 13 * channels can be selected, determined by the contents of the programmable
okano 0:c88a1756cfd3 14 * control register.
okano 0:c88a1756cfd3 15 *
okano 0:c88a1756cfd3 16 * For more information about PCA9546A:
okano 0:c88a1756cfd3 17 * http://www.nxp.com/documents/data_sheet/PCA9546A.pdf
okano 0:c88a1756cfd3 18 *
okano 0:c88a1756cfd3 19 */
okano 0:c88a1756cfd3 20
okano 0:c88a1756cfd3 21 #include "mbed.h"
okano 0:c88a1756cfd3 22 #include "LM75B.h"
okano 0:c88a1756cfd3 23 #include "PCA9546A.h"
okano 0:c88a1756cfd3 24
okano 0:c88a1756cfd3 25 PCA9546A i2c_sw( p28, p27, 0xE0 );
okano 0:c88a1756cfd3 26
okano 0:c88a1756cfd3 27 int main()
okano 0:c88a1756cfd3 28 {
okano 0:c88a1756cfd3 29 // all PCA9546A's downstream ports are OFF after power-up and hardware-reset
okano 0:c88a1756cfd3 30
okano 0:c88a1756cfd3 31 i2c_sw.on( 0 ); // turn-ON the channel 0
okano 0:c88a1756cfd3 32
okano 0:c88a1756cfd3 33 LM75B tmp0( p28, p27 ); // making instance after a branch of I2C bus (which is connecting the LM75B) enabled
okano 0:c88a1756cfd3 34
okano 0:c88a1756cfd3 35 i2c_sw.off( 0 ); // turn-OFF the channel 0
okano 0:c88a1756cfd3 36 i2c_sw.on( 1 ); // turn-ON the channel 1
okano 0:c88a1756cfd3 37
okano 0:c88a1756cfd3 38 LM75B tmp1( p28, p27 ); // making instance after a branch of I2C bus (which is connecting the LM75B) enabled
okano 0:c88a1756cfd3 39
okano 0:c88a1756cfd3 40 while(1) {
okano 0:c88a1756cfd3 41
okano 0:c88a1756cfd3 42 i2c_sw.off( 1 ); // turn-OFF the channel 1
okano 0:c88a1756cfd3 43 i2c_sw.on( 0 ); // turn-ON the channel 0
okano 0:c88a1756cfd3 44 printf( "%.3f\r\n", tmp0.read() );
okano 0:c88a1756cfd3 45
okano 0:c88a1756cfd3 46 i2c_sw.off( 0 ); // turn-OFF the channel 0
okano 0:c88a1756cfd3 47 i2c_sw.on( 1 ); // turn-ON the channel 1
okano 0:c88a1756cfd3 48 printf( "%.3f\r\n", tmp1.read() );
okano 0:c88a1756cfd3 49
okano 0:c88a1756cfd3 50 wait( 1.0 );
okano 0:c88a1756cfd3 51 }
okano 0:c88a1756cfd3 52 }