Example #1
0
/*!
 * \brief write to the chip
 * \param serial serial port object
 * \param timeout_mS communications timeout in milliseconds
 * \return true if successful
 */
bool SonarChipWrite(
    SerialPort &serial,
    unsigned timeout_mS)
{
    sbuf[0] = I2C_CMD;
    sbuf[1] = 0x40;
    if ((write_x & 3) == 3)
        sbuf[2] = 0xfe;
    else
        sbuf[2] = 0xff;
    write_x++;

    CurrentTransmissionType = TRANSMISSION_CHIP_WRITE;

    if (serial.Out(sbuf, 3, timeout_mS) > 0)
        return true;
    else
        return false;
}
Example #2
0
/*!
 * \brief sets the address of a sensor
 * \param serial serial port object
 * \param sensor_address address
 * \param timeout_mS communications timeout in milliseconds
 * \return true if successful
 */
bool SetSensorAddress(
    SerialPort &serial,
    unsigned char sensor_address,
    unsigned timeout_mS)
{
    if ((sensor_address <= 0xfe) && (sensor_address >= 0xe0)) {
        sbuf[0] = CM01_CMD;
        sbuf[1] = 0x02;
        sbuf[2] = sensor_address;
        sbuf[3] = 0;

        CurrentTransmissionType = TRANSMISSION_SET_ADDRESS;
        if (serial.Out(sbuf, 4, timeout_mS) > 0)
            return true;
        else
            return false;
    }
    else {
        ROS_ERROR("SRF08 invalid sensor address: %d", (int)sensor_address);
        return false;
    }
}
Example #3
0
/*!
 * \brief sends a request to read the time of flight of a previous ping
 * \param serial serial port object
 * \param sensor_address address
 * \param timeout_mS communications timeout in milliseconds
 * \return true if successful
 */
bool SonarRead(
    SerialPort &serial,
    unsigned char sensor_address,
    unsigned timeout_mS)
{
    if ((sensor_address <= 0xfe) && (sensor_address >= 0xe0)) {                      
        sbuf[0] = I2C_CMD;  // send sonar read command
        sbuf[1] = (unsigned char)(sensor_address+1);
        sbuf[2] = 0x00;
        sbuf[3] = 0x04;

        CurrentTransmissionType = TRANSMISSION_READ;
        if (serial.Out(sbuf, 4, timeout_mS) > 0)
            return true;
        else
            return false;
    }
    else {
        ROS_ERROR("SRF08 invalid sensor address: %d",(int)sensor_address);
        return false;
    }
}
Example #4
0
/*!
 * \brief sets the sensor gain
 * \param serial serial port object
 * \param sensor_address address
 * \param timeout_mS communications timeout in milliseconds
 * \return true if successful
 */
bool SonarGainLimit(
    SerialPort &serial,
    unsigned char sensor_address,
    unsigned timeout_mS)
{
    if ((sensor_address <= 0xfe) && (sensor_address >=0xe0)) {                      
        sbuf[0] = I2C_CMD; // send gain limit
        sbuf[1] = sensor_address;
        sbuf[2] = 0x01;
        sbuf[3] = 0x01;
        sbuf[4] = 20;
               
        CurrentTransmissionType = TRANSMISSION_GAIN;
        if (serial.Out(sbuf, 5, timeout_mS) > 0)
            return true;
        else
            return false;
    }
    else {
        ROS_ERROR("SRF08 invalid sensor address: %d",(int)sensor_address);
        return false;
    }
}
Example #5
0
/*!
 * \brief sends out a ping
 * \param serial serial port object
 * \param sensor_address address
 * \param timeout_mS communications timeout in milliseconds
 * \return true if successful
 */
bool SonarPing(
    SerialPort &serial,
    unsigned char sensor_address,
    unsigned timeout_mS)
{
    if ((sensor_address <= 0xfe) && (sensor_address >=0xe0)) {                      
        sbuf[0] = I2C_CMD;  // send sonar rangeing (uS) command
        sbuf[1] = sensor_address;
        sbuf[2] = 0x00;
        sbuf[3] = 0x01;
        sbuf[4] = 0x52;
               
        CurrentTransmissionType = TRANSMISSION_PING;

        if (serial.Out(sbuf, 5, timeout_mS) > 0)
            return true;
        else
            return false;
    }
    else {
        ROS_ERROR("SRF08 invalid sensor address: %d",(int)sensor_address);
        return false;
    }
}