uint8 hal_dev_mag3110_read_reg(uint8 addr)
{
    uint8 result;

    i2c_start(I2C_MAG);
    i2c_write_byte(I2C_MAG, MAG3110_I2C_ADDRESS | I2C_WRITE);
    
    i2c_wait(I2C_MAG);
    i2c_get_ack(I2C_MAG);

    i2c_write_byte(I2C_MAG, addr);
    i2c_wait(I2C_MAG);
    i2c_get_ack(I2C_MAG);

    i2c_repeated_start(I2C_MAG);
    i2c_write_byte(I2C_MAG, MAG3110_I2C_ADDRESS | I2C_READ);
    i2c_wait(I2C_MAG);
    i2c_get_ack(I2C_MAG);

    i2c_set_rx_mode(I2C_MAG);

    i2c_give_nack(I2C_MAG);
    result = i2c_read_byte(I2C_MAG);
    i2c_wait(I2C_MAG);

    i2c_stop(I2C_MAG);
    result = i2c_read_byte(I2C_MAG);
    pause();
    return result;
}
Example #2
0
uint8_t I2C_ReadOneByte(uint8_t SlaveAddr, uint8_t RegAddr)
{
    uint8_t result;

    i2c_start(I2C0_B);
    i2c_write_byte(I2C0_B, (SlaveAddr<<1) | I2C_WRITE);
    
    i2c_wait(I2C0_B);
    i2c_get_ack(I2C0_B);

    i2c_write_byte(I2C0_B, RegAddr);
    i2c_wait(I2C0_B);
    i2c_get_ack(I2C0_B);

    i2c_repeated_start(I2C0_B);
    i2c_write_byte(I2C0_B, (SlaveAddr<<1) | I2C_READ);
    i2c_wait(I2C0_B);
    i2c_get_ack(I2C0_B);

    i2c_set_rx_mode(I2C0_B);

    i2c_give_nack(I2C0_B);
    result = i2c_read_byte(I2C0_B);
    i2c_wait(I2C0_B);

    i2c_stop(I2C0_B);
    result = i2c_read_byte(I2C0_B);
    pause(40);
    return result;
}
Example #3
0
uint8 hal_dev_mma8451_read_reg(uint8 addr)
{
    uint8 result;
    int i;  
	
    i2c_start(I2C0_B);
    i2c_write_byte(I2C0_B, MMA8451_I2C_ADDRESS | I2C_WRITE);
    
    i2c_wait(I2C0_B);
    i2c_get_ack(I2C0_B);

    i2c_write_byte(I2C0_B, addr);
    i2c_wait(I2C0_B);
    i2c_get_ack(I2C0_B);

    i2c_repeated_start(I2C0_B);
		for(i=0;i<1000;i++)
       for( i=0;i<1000;i++);
	
    i2c_write_byte(I2C0_B, MMA8451_I2C_ADDRESS | I2C_READ);
    i2c_wait(I2C0_B);
    i2c_get_ack(I2C0_B);

    i2c_set_rx_mode(I2C0_B);

    i2c_give_nack(I2C0_B);
    result = i2c_read_byte(I2C0_B);
    i2c_wait(I2C0_B);

    i2c_stop(I2C0_B);
    result = i2c_read_byte(I2C0_B);
    pause();
		for(i=0;i<1000;i++)
       for( i=0;i<1000;i++);
    return result;
}
void i2c_stop(I2C_MemMapPtr p)
{
    i2c_set_slave_mode(p);
    i2c_set_rx_mode(p);
}