APDS-9960のRGBセンサーを使ってみる

前々回のジェスチャーセンサー、前回の近接センサーに引き続き、APDS-9960の最後の機能である照度・RGBセンサーを使ってみました。

最初に言っておきますが、今回は動作確認程度のかなり適当な内容になっていますのでご了承ください。

今回は照度・RGBセンサー単体で動作させることにします。

設定が必要なのはカラーエンジンの起動とADCの集積時間、ゲインの設定ぐらいです。

特に詳しく解説することもないので早速動作確認に入ります。RGBセンサーは反射型ではないので、かざした物体の色を判別するのは難しいです。今回はスマホの画面を光らせてその色を測定しました。

その結果がこちらです。

測定値は16bitなのですが、それだとLCDに表示しきれないので、上位8bitだけ表示しています。

色によって明るさの絶対値も違っているのでこの測定値をそのまま使うのは難しいかもしれませんが、RGBの大小関係はしっかり測定できています。

今回は動作確認だけですのでこれで十分とします。

最後にソースコードを載せておきます。

#pragma config FEXTOSC = OFF    // FEXTOSC External Oscillator mode Selection bits (Oscillator not enabled)
#pragma config RSTOSC = HFINT1  // Power-up default value for COSC bits (HFINTOSC (1MHz))
#pragma config CLKOUTEN = OFF   // Clock Out Enable bit (CLKOUT function is disabled; I/O or oscillator function on OSC2)
#pragma config CSWEN = ON       // Clock Switch Enable bit (Writing to NOSC and NDIV is allowed)
#pragma config FCMEN = ON       // Fail-Safe Clock Monitor Enable (Fail-Safe Clock Monitor is enabled)
#pragma config MCLRE = ON       // Master Clear Enable bit (MCLR/VPP pin function is MCLR; Weak pull-up enabled)
#pragma config PWRTE = OFF      // Power-up Timer Enable bit (PWRT disabled)
#pragma config WDTE = OFF       // Watchdog Timer Enable bits (WDT disabled; SWDTEN is ignored)
#pragma config LPBOREN = OFF    // Low-power BOR enable bit (ULPBOR disabled)
#pragma config BOREN = OFF      // Brown-out Reset Enable bits (Brown-out Reset disabled)
#pragma config BORV = LOW       // Brown-out Reset Voltage selection bit (Brown-out voltage (Vbor) set to 2.45V)
#pragma config PPS1WAY = ON     // PPSLOCK bit One-Way Set Enable bit (The PPSLOCK bit can be cleared and set only once; PPS registers remain locked after one clear/set cycle)
#pragma config STVREN = ON      // Stack Overflow/Underflow Reset Enable bit (Stack Overflow or Underflow will cause a Reset)
#pragma config DEBUG = OFF      // Debugger enable bit (Background debugger disabled)
#pragma config WRT = OFF        // User NVM self-write protection bits (Write protection off)
#pragma config LVP = OFF        // Low Voltage Programming Enable bit (High Voltage on MCLR/VPP must be used for programming.)
#pragma config CP = OFF         // User NVM Program Memory Code Protection bit (User NVM code protection disabled)
#pragma config CPD = OFF        // Data NVM Memory Code Protection bit (Data NVM code protection disabled)

#include <xc.h>
#include <stdio.h>
#include "i2c.h"
#include "lcd_i2c.h"

#define _XTAL_FREQ 16000000

char CRGB[8] = {0,0,0,0,0,0,0,0};

void init(){
    OSCFRQ = 0x06;          //3 : 4MHz/ 4 : 8MHz/ 6 : 16MHz/ 7 : 32MHz
    OSCCON1bits.NDIV = 0x0; //Clock Divider 1/1
    
    TRISA = 0b00001000;
    TRISC = 0b00110000;
    ANSELA = 0b00000000;
    ANSELC = 0b00000000;
    WPUA = 0b00000000;
    WPUC = 0b00000000;
    
    PORTA = 0b00000000;
    PORTC = 0b00000000;
}

void putch(char c){
    lcd_DATA(c);
}

void APDS_Send(char address, char data){
    I2C_Master_Start();
    I2C_Master_Write(0x72);     //SlaveAdress + Write
    I2C_Master_Write(address);  //RegisterAdress
    I2C_Master_Write(data);
    I2C_Master_Stop();
}

void APDS_ReadALS(){
    I2C_Master_Start();
    I2C_Master_Write(0x72);     //SlaveAdress + Write
    I2C_Master_Write(0x94);     //Adress
    I2C_Master_RepeatedStart();
    I2C_Master_Write(0x73);     //SlaveAdress + Read
    for(char i=0; i<7; i++){
        CRGB[i] = I2C_Master_Read(0);
    }
    CRGB[7] = I2C_Master_Read(1);
    I2C_Master_Stop();
}

char APDS_AVALIDCheck(){
    char check = 0;
    
    I2C_Master_Start();
    I2C_Master_Write(0x72);     //SlaveAdress + Write
    I2C_Master_Write(0x93);     //Adress
    I2C_Master_RepeatedStart();
    I2C_Master_Write(0x73);     //SlaveAdress + Read
    check = I2C_Master_Read(1);
    I2C_Master_Stop();
    
    return check&0x01;
}

void APDS_ALS_Init(){
    APDS_Send(0x80,0x03);   //POWER ON, ALS ENALBE
    APDS_Send(0x81,220);    //ADC Integration Time 100ms
    APDS_Send(0x8F,0x03);   //GAIN 64x
}

int main() {
    init();
    
    I2C_Master_Init(100000);
    lcd_Init();
    APDS_ALS_Init();
    
    while(1){
        if(APDS_AVALIDCheck() == 1){
            APDS_ReadALS();
            lcd_SetCursor(0,0);
            printf("C%3dR%3d",CRGB[1],CRGB[3]);
            lcd_SetCursor(0,1);
            printf("G%3dB%3d",CRGB[5],CRGB[7]);
        }
    }
}

100

101

102

103

104

105

#pragma config FEXTOSC = OFF // FEXTOSC External Oscillator mode Selection bits (Oscillator not enabled)

#pragma config RSTOSC = HFINT1 // Power-up default value for COSC bits (HFINTOSC (1MHz))

#pragma config CLKOUTEN = OFF // Clock Out Enable bit (CLKOUT function is disabled; I/O or oscillator function on OSC2)

#pragma config CSWEN = ON // Clock Switch Enable bit (Writing to NOSC and NDIV is allowed)

#pragma config FCMEN = ON // Fail-Safe Clock Monitor Enable (Fail-Safe Clock Monitor is enabled)

#pragma config MCLRE = ON // Master Clear Enable bit (MCLR/VPP pin function is MCLR; Weak pull-up enabled)

#pragma config PWRTE = OFF // Power-up Timer Enable bit (PWRT disabled)

#pragma config WDTE = OFF // Watchdog Timer Enable bits (WDT disabled; SWDTEN is ignored)

#pragma config LPBOREN = OFF // Low-power BOR enable bit (ULPBOR disabled)

#pragma config BOREN = OFF // Brown-out Reset Enable bits (Brown-out Reset disabled)

#pragma config BORV = LOW // Brown-out Reset Voltage selection bit (Brown-out voltage (Vbor) set to 2.45V)

#pragma config PPS1WAY = ON // PPSLOCK bit One-Way Set Enable bit (The PPSLOCK bit can be cleared and set only once; PPS registers remain locked after one clear/set cycle)

#pragma config STVREN = ON // Stack Overflow/Underflow Reset Enable bit (Stack Overflow or Underflow will cause a Reset)

#pragma config DEBUG = OFF // Debugger enable bit (Background debugger disabled)

#pragma config WRT = OFF // User NVM self-write protection bits (Write protection off)

#pragma config LVP = OFF // Low Voltage Programming Enable bit (High Voltage on MCLR/VPP must be used for programming.)

#pragma config CP = OFF // User NVM Program Memory Code Protection bit (User NVM code protection disabled)

#pragma config CPD = OFF // Data NVM Memory Code Protection bit (Data NVM code protection disabled)

#include <xc.h>

#include <stdio.h>

#include "i2c.h"

#include "lcd_i2c.h"

#define _XTAL_FREQ 16000000

char CRGB[8] = {0,0,0,0,0,0,0,0};

void init(){

OSCFRQ = 0x06; //3 : 4MHz/ 4 : 8MHz/ 6 : 16MHz/ 7 : 32MHz

OSCCON1bits.NDIV = 0x0; //Clock Divider 1/1

TRISA = 0b00001000;

TRISC = 0b00110000;

ANSELA = 0b00000000;

ANSELC = 0b00000000;

WPUA = 0b00000000;

WPUC = 0b00000000;

PORTA = 0b00000000;

PORTC = 0b00000000;

}

void putch(char c){

lcd_DATA(c);

}

void APDS_Send(char address, char data){

I2C_Master_Start();

I2C_Master_Write(0x72); //SlaveAdress + Write

I2C_Master_Write(address); //RegisterAdress

I2C_Master_Write(data);

I2C_Master_Stop();

}

void APDS_ReadALS(){

I2C_Master_Start();

I2C_Master_Write(0x72); //SlaveAdress + Write

I2C_Master_Write(0x94); //Adress

I2C_Master_RepeatedStart();

I2C_Master_Write(0x73); //SlaveAdress + Read

for(char i=0; i<7; i++){

CRGB[i] = I2C_Master_Read(0);

}

CRGB[7] = I2C_Master_Read(1);

I2C_Master_Stop();

}

char APDS_AVALIDCheck(){

char check = 0;

I2C_Master_Start();

I2C_Master_Write(0x72); //SlaveAdress + Write

I2C_Master_Write(0x93); //Adress

I2C_Master_RepeatedStart();

I2C_Master_Write(0x73); //SlaveAdress + Read

check = I2C_Master_Read(1);

I2C_Master_Stop();

return check&0x01;

}

void APDS_ALS_Init(){

APDS_Send(0x80,0x03); //POWER ON, ALS ENALBE

APDS_Send(0x81,220); //ADC Integration Time 100ms

APDS_Send(0x8F,0x03); //GAIN 64x

}

int main() {

init();

I2C_Master_Init(100000);

lcd_Init();

APDS_ALS_Init();

while(1){

if(APDS_AVALIDCheck() == 1){

APDS_ReadALS();

lcd_SetCursor(0,0);

printf("C%3dR%3d",CRGB[1],CRGB[3]);

lcd_SetCursor(0,1);

printf("G%3dB%3d",CRGB[5],CRGB[7]);

}

▼I2Cライブラリ

#include<xc.h>
#define _XTAL_FREQ 16000000

void I2C_Master_Init(const unsigned long c){
  SSP2CON1 = 0x28;                //SSP2 Module as Master
  SSP2CON2 = 0x00;
  SSP2CON3 = 0x00;
  SSP2ADD = (_XTAL_FREQ/(4*c))-1; //Setting Clock Speed
  SSP2STAT = 0x80;
  
  SSP2CLKPPS = 0x14;              //PPS Settings
  SSP2DATPPS = 0x15;              // SCL : RC4
  RC4PPS = 0x1a;                  // SDA : RC5
  RC5PPS = 0x1b;
}
void I2C_Master_Wait(){
  while ((SSP2STAT & 0x04) || (SSP2CON2 & 0x1F)); //Transmit is in progress
    
}
void I2C_Master_Start(){
  I2C_Master_Wait();    
  SSP2CON2bits.SEN = 1;           //Initiate start condition
}
void I2C_Master_RepeatedStart(){
  I2C_Master_Wait();
  SSP2CON2bits.RSEN = 1;          //Initiate repeated start condition
}
void I2C_Master_Stop(){
  I2C_Master_Wait();
  SSP2CON2bits.PEN = 1;           //Initiate stop condition
}
void I2C_Master_Write(unsigned d){
  I2C_Master_Wait();
  SSP2BUF = d;                    //Write data to SSP2BUF
}
unsigned short I2C_Master_Read(unsigned short a){
  unsigned short temp;
  I2C_Master_Wait();
  SSP2CON2bits.RCEN = 1;
  I2C_Master_Wait();
  temp = SSP2BUF;                 //Read data from SSP2BUF
  I2C_Master_Wait();
  SSP2CON2bits.ACKDT = a;         //Acknowledge bit
  SSP2CON2bits.ACKEN = 1;         //Acknowledge sequence
  return temp;
}</xc.h>

#include<xc.h>

#define _XTAL_FREQ 16000000

void I2C_Master_Init(const unsigned long c){

SSP2CON1 = 0x28; //SSP2 Module as Master

SSP2CON2 = 0x00;

SSP2CON3 = 0x00;

SSP2ADD = (_XTAL_FREQ/(4*c))-1; //Setting Clock Speed

SSP2STAT = 0x80;

SSP2CLKPPS = 0x14; //PPS Settings

SSP2DATPPS = 0x15; // SCL : RC4

RC4PPS = 0x1a; // SDA : RC5

RC5PPS = 0x1b;

}

void I2C_Master_Wait(){

while ((SSP2STAT & 0x04) || (SSP2CON2 & 0x1F)); //Transmit is in progress

}

void I2C_Master_Start(){

I2C_Master_Wait();

SSP2CON2bits.SEN = 1; //Initiate start condition

}

void I2C_Master_RepeatedStart(){

I2C_Master_Wait();

SSP2CON2bits.RSEN = 1; //Initiate repeated start condition

}

void I2C_Master_Stop(){

I2C_Master_Wait();

SSP2CON2bits.PEN = 1; //Initiate stop condition

}

void I2C_Master_Write(unsigned d){

I2C_Master_Wait();

SSP2BUF = d; //Write data to SSP2BUF

}

unsigned short I2C_Master_Read(unsigned short a){

unsigned short temp;

I2C_Master_Wait();

SSP2CON2bits.RCEN = 1;

I2C_Master_Wait();

temp = SSP2BUF; //Read data from SSP2BUF

I2C_Master_Wait();

SSP2CON2bits.ACKDT = a; //Acknowledge bit

SSP2CON2bits.ACKEN = 1; //Acknowledge sequence

return temp;

}</xc.h>

void I2C_Master_Init(const unsigned long c);
void I2C_Master_Wait();
void I2C_Master_Start();
void I2C_Master_RepeatedStart();
void I2C_Master_Stop();
void I2C_Master_Write(unsigned d);
unsigned short I2C_Master_Read(unsigned short a);

void I2C_Master_Init(const unsigned long c);

void I2C_Master_Wait();

void I2C_Master_Start();

void I2C_Master_RepeatedStart();

void I2C_Master_Stop();

void I2C_Master_Write(unsigned d);

unsigned short I2C_Master_Read(unsigned short a);

▼LCDライブラリ

#include "i2c.h"
#include <xc.h>
#define _XTAL_FREQ 16000000
#define CONTRAST 0x18  //for 3.3V
//#define CONTRAST 0x08  //for 5V
const char lcd_DDRAM[4] = {0x00, 0x40, 0x14, 0x54};

void lcd_INST(char command){
    I2C_Master_Start();
    I2C_Master_Write(0x7C);     //SlaveAdress + Write
    I2C_Master_Write(0x00);     //Instruction
    I2C_Master_Write(command);  //data byte
    I2C_Master_Stop();
    __delay_us(30);
}

void lcd_DATA(char data){
    I2C_Master_Start();
    I2C_Master_Write(0x7C);     //SlaveAdress + Write
    I2C_Master_Write(0x40);     //Data
    I2C_Master_Write(data);     //data byte
    I2C_Master_Stop();
    __delay_us(30);
}

void lcd_Init(){
    __delay_ms(40);
    lcd_INST(0x38);      //Function Set
    lcd_INST(0x39);      //Function Set
    lcd_INST(0x14);      //Internal OSC Frequency
    lcd_INST(0x70 + (CONTRAST & 0x0f));        //Contrast Set
    lcd_INST(0x54 + ((CONTRAST & 0xf0)>>4));   //Power/ICON/Contrast control
    lcd_INST(0x6c);      //Follower control
    __delay_ms(200);
    lcd_INST(0x38);      //Function Set
    lcd_INST(0x0c);      //Display ON/OFF control
    lcd_INST(0x01);      //Clear Display
    __delay_ms(2);
}

void lcd_SetCursor(char x,char y){
    char d = lcd_DDRAM[y] + x;
    lcd_INST( 0x80+d);
}</xc.h>

#include "i2c.h"

#include <xc.h>

#define _XTAL_FREQ 16000000

#define CONTRAST 0x18 //for 3.3V

//#define CONTRAST 0x08 //for 5V

const char lcd_DDRAM[4] = {0x00, 0x40, 0x14, 0x54};

void lcd_INST(char command){

I2C_Master_Start();

I2C_Master_Write(0x7C); //SlaveAdress + Write

I2C_Master_Write(0x00); //Instruction

I2C_Master_Write(command); //data byte

I2C_Master_Stop();

__delay_us(30);

}

void lcd_DATA(char data){

I2C_Master_Start();

I2C_Master_Write(0x7C); //SlaveAdress + Write

I2C_Master_Write(0x40); //Data

I2C_Master_Write(data); //data byte

I2C_Master_Stop();

__delay_us(30);

}

void lcd_Init(){

__delay_ms(40);

lcd_INST(0x38); //Function Set

lcd_INST(0x39); //Function Set

lcd_INST(0x14); //Internal OSC Frequency

lcd_INST(0x70 + (CONTRAST & 0x0f)); //Contrast Set

lcd_INST(0x54 + ((CONTRAST & 0xf0)>>4)); //Power/ICON/Contrast control

lcd_INST(0x6c); //Follower control

__delay_ms(200);

lcd_INST(0x38); //Function Set

lcd_INST(0x0c); //Display ON/OFF control

lcd_INST(0x01); //Clear Display

__delay_ms(2);

}

void lcd_SetCursor(char x,char y){

char d = lcd_DDRAM[y] + x;

lcd_INST( 0x80+d);

}</xc.h>

void lcd_INST(char command);
void lcd_DATA(char data);
void lcd_Init();
void lcd_SetCursor(char x,char y);

void lcd_INST(char command);

void lcd_DATA(char data);

void lcd_Init();

void lcd_SetCursor(char x,char y);