Takashi Matsuoka / MjGP2Y0E03

For Sharp GP2Y0E03(optical distance measurement sensor).

#include "mbed.h"
#include "MjGP2Y0E03.h"

using namespace matsujirushi;

Serial pc(USBTX, USBRX);
I2C i2c(dp5, dp27);
MjGP2Y0E03 distanceSensor(&i2c, 0x80);

int main()
{
    pc.baud(115200);
    i2c.frequency(400000);
    for(;;)
    {
        uint16_t distance = distanceSensor.getDistance();
        
        pc.printf("%4d [", distance);
        int i;
        for (i = 0; i < distance / 50; i++)
        {
            pc.putc('*');
        }
        for (; i < 4096 / 50; i++)
        {
            pc.putc(' ');
        }
        pc.puts("]\r\n");
        
        wait_ms(50);
    }
}

MjGP2Y0E03.cpp

Committer:
matsujirushi
Date:
2014-11-24
Revision:
0:33c4a1de6547
Child:
1:1832cde75561

File content as of revision 0:33c4a1de6547:

#include "MjGP2Y0E03.h"

namespace matsujirushi {

MjGP2Y0E03::MjGP2Y0E03(I2C* i2c, uint8_t address)
{
    this->i2c = i2c;
    this->address = address;
}

uint16_t MjGP2Y0E03::getDistance()
{
    char regAddress = 0x5e;
    i2c->write(address, &regAddress, 1, true);
    
    char data[2];
    i2c->read(address, data, sizeof (data));
    
    return ((uint16_t)data[0] << 4) + (data[1] & 0x0f);
}

} // namespace matsujirushi