Michael Wilkens / TCA9548

mbed library for the TCA9548 mux

Fork of libTCS34725 by Michael Wilkens

TCS34725.cpp@1:06c9bbbdb8b0, 2017-01-24 (annotated)

Committer:
mwilkens241
Date:
Tue Jan 24 23:25:54 2017 +0000
Revision:
1:06c9bbbdb8b0
Parent:
0:4796574af790
Child:
2:cc2c0831a763
i2c library done but not working

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mwilkens241 0:4796574af790 1 #include "TCS34725.h"
mwilkens241 0:4796574af790 2
mwilkens241 1:06c9bbbdb8b0 3 I2C i2c(SDA, SCL);
mwilkens241 1:06c9bbbdb8b0 4
mwilkens241 0:4796574af790 5 void i2cWrite8(uint8_t addr, char reg, char data){
mwilkens241 1:06c9bbbdb8b0 6 char packet[2] = {reg + 0x80,data}; // unclear why 0x80 needs to be added...
mwilkens241 1:06c9bbbdb8b0 7 i2c.write(addr,packet,2,false);
mwilkens241 0:4796574af790 8 }
mwilkens241 0:4796574af790 9
mwilkens241 0:4796574af790 10 uint8_t i2cRead8(uint8_t addr, char reg){
mwilkens241 1:06c9bbbdb8b0 11 char packet[1] = {reg + 0x80};
mwilkens241 1:06c9bbbdb8b0 12 char data[1] = {0};
mwilkens241 1:06c9bbbdb8b0 13 i2c.write(addr,packet,1, true);
mwilkens241 1:06c9bbbdb8b0 14 i2c.read(addr,data,1,false);
mwilkens241 1:06c9bbbdb8b0 15 return (uint8_t)data[0];
mwilkens241 0:4796574af790 16 }
mwilkens241 0:4796574af790 17
mwilkens241 0:4796574af790 18 uint16_t i2cRead16(uint8_t addr, char reg){
mwilkens241 1:06c9bbbdb8b0 19 char packet[1] = {reg + 0x80};
mwilkens241 1:06c9bbbdb8b0 20 char data[2] = {0,0};
mwilkens241 1:06c9bbbdb8b0 21 i2c.write(addr,packet,1, true);
mwilkens241 1:06c9bbbdb8b0 22 i2c.read(addr,data,2, false);
mwilkens241 1:06c9bbbdb8b0 23 return ((uint16_t)data[1] << 8) | (uint16_t)data[0];
mwilkens241 0:4796574af790 24 }
mwilkens241 0:4796574af790 25
mwilkens241 1:06c9bbbdb8b0 26 bool TCS34725_init(char intTime, char gain){
mwilkens241 1:06c9bbbdb8b0 27 i2c.frequency(400000);
mwilkens241 1:06c9bbbdb8b0 28
mwilkens241 1:06c9bbbdb8b0 29 uint8_t id = i2cRead8(SENSOR_ADDR, TCS34725_ID);
mwilkens241 1:06c9bbbdb8b0 30 if(id != 0x44)return false;
mwilkens241 0:4796574af790 31
mwilkens241 1:06c9bbbdb8b0 32 i2cWrite8(SENSOR_ADDR,TCS34725_ATIME, intTime);
mwilkens241 1:06c9bbbdb8b0 33 i2cWrite8(SENSOR_ADDR,TCS34725_CONTROL, gain);
mwilkens241 1:06c9bbbdb8b0 34 i2cWrite8(SENSOR_ADDR,TCS34725_ENABLE, TCS34725_ENABLE_PON);
mwilkens241 1:06c9bbbdb8b0 35 wait(0.003);
mwilkens241 1:06c9bbbdb8b0 36 i2cWrite8(SENSOR_ADDR,TCS34725_ENABLE, TCS34725_ENABLE_PON | TCS34725_ENABLE_AEN);
mwilkens241 1:06c9bbbdb8b0 37 return true;
mwilkens241 0:4796574af790 38 }
mwilkens241 0:4796574af790 39
mwilkens241 1:06c9bbbdb8b0 40 void TCS34725_config(char intTime, char gain){
mwilkens241 1:06c9bbbdb8b0 41 uint8_t reg = i2cRead8(SENSOR_ADDR, TCS34725_ENABLE);
mwilkens241 1:06c9bbbdb8b0 42 i2cWrite8(SENSOR_ADDR,TCS34725_ENABLE, reg | ~(TCS34725_ENABLE_PON | TCS34725_ENABLE_AEN));
mwilkens241 1:06c9bbbdb8b0 43 TCS34725_init(intTime,gain);
mwilkens241 1:06c9bbbdb8b0 44 }
mwilkens241 1:06c9bbbdb8b0 45
mwilkens241 1:06c9bbbdb8b0 46 void TCS34725_getColor(uint16_t *r, uint16_t *g, uint16_t *b, uint16_t *c){
mwilkens241 1:06c9bbbdb8b0 47 *c = i2cRead16(SENSOR_ADDR, TCS34725_CDATAL);
mwilkens241 1:06c9bbbdb8b0 48 *r = i2cRead16(SENSOR_ADDR, TCS34725_RDATAL);
mwilkens241 1:06c9bbbdb8b0 49 *g = i2cRead16(SENSOR_ADDR, TCS34725_GDATAL);
mwilkens241 1:06c9bbbdb8b0 50 *b = i2cRead16(SENSOR_ADDR, TCS34725_BDATAL);
mwilkens241 0:4796574af790 51 }