Sarah Marsh / TCA9548A

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Fork of TCA9548A by Akash Vibhute

tca9548a.cpp@2:1107ee23873a, 2017-12-12 (annotated)

Committer:
sarahmarshy
Date:
Tue Dec 12 22:14:58 2017 +0000
Revision:
2:1107ee23873a
Parent:
0:5bd73cede544 
Update address of control register. Add function for checking which I2C channel is set.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
akashvibhute 0:5bd73cede544 1 /**
akashvibhute 0:5bd73cede544 2 * TCA9548A library
akashvibhute 0:5bd73cede544 3 *
akashvibhute 0:5bd73cede544 4 * @author Akash Vibhute
akashvibhute 0:5bd73cede544 5 * @author < akash . roboticist [at] gmail . com >
akashvibhute 0:5bd73cede544 6 * @version 0.1
akashvibhute 0:5bd73cede544 7 * @date May/24/2016
akashvibhute 0:5bd73cede544 8 */
akashvibhute 0:5bd73cede544 9
akashvibhute 0:5bd73cede544 10 #include "tca9548a.h"
akashvibhute 0:5bd73cede544 11
sarahmarshy 2:1107ee23873a 12 TCA9548A::TCA9548A( PinName sda, PinName scl, uint8_t i2c_address, PinName resetPin) : i2c_(sda, scl), reset_pin(resetPin)
akashvibhute 0:5bd73cede544 13 {
akashvibhute 0:5bd73cede544 14 i2c_addr = i2c_address;
akashvibhute 0:5bd73cede544 15 }
akashvibhute 0:5bd73cede544 16
akashvibhute 0:5bd73cede544 17
akashvibhute 0:5bd73cede544 18 void TCA9548A::select( uint8_t channel )
akashvibhute 0:5bd73cede544 19 {
akashvibhute 0:5bd73cede544 20 if(channel >= 8) return;
sarahmarshy 2:1107ee23873a 21 char data[1];
sarahmarshy 2:1107ee23873a 22 data[0] = 1 << channel;
sarahmarshy 2:1107ee23873a 23 int err = i2c_.write(0xE0, data, 1);
sarahmarshy 2:1107ee23873a 24 }
sarahmarshy 2:1107ee23873a 25
sarahmarshy 2:1107ee23873a 26 char TCA9548A::check_set_channel()
sarahmarshy 2:1107ee23873a 27 {
sarahmarshy 2:1107ee23873a 28 char data[1];
sarahmarshy 2:1107ee23873a 29 int err = i2c_.read(0xE1, data, 1);
sarahmarshy 2:1107ee23873a 30 return data[0];
akashvibhute 0:5bd73cede544 31 }
akashvibhute 0:5bd73cede544 32
akashvibhute 0:5bd73cede544 33 void TCA9548A::reset( )
akashvibhute 0:5bd73cede544 34 {
akashvibhute 0:5bd73cede544 35 reset_pin = 0;
akashvibhute 0:5bd73cede544 36 wait_ms(1);
akashvibhute 0:5bd73cede544 37 reset_pin = 1;
akashvibhute 0:5bd73cede544 38 }
akashvibhute 0:5bd73cede544 39