I2C-It BASCOM-AVR

Пример измерения растояния I2C-It для MiniBot'a на BASCOM-AVR

Это первая приблизительная версия, пример измерения растояния с помощью I2C-It IR Rangefinder фирмы HVW Technologies. Написана на основе примеров и реально на железе не проверялась. Т.к. я в Грузии а МиниБот в России ;-).

<source lang="vb"> '------------------------------------------------------------------------------- 'name  : i2c_IRF.bas 'copyright  : (c) 2008, Konstantin Kostyuk 'purpose  : read data from I2C-It - InfraRed Fainder for I2C bus 'micro  : Mega32 'device  : MiniBot - Russian National Class 'commercial addon needed  : no '------------------------------------------------------------------------------- $prog &HFF , &HE4 , &HD9 , &H00 $regfile = "m32def.dat" $crystal = 8000000 $baud = 2400 '------------------------------------------------------------------------------- ' Hardvare ' ' PC0 - I2c SLC ' PC1 - I2c SDA Config Scl = Portc.0 Config Sda = Portc.1 '------------------------------------------------------------------------------- 'Declarations Declare Sub Get_distance(byval Adres As Byte , Value As Byte) '------------------------------------------------------------------------------- 'Constants ' 'Default Write address for I2C-It. 'You Can set new adress by hardware pins, see datashit Const Waddress = &H20 'Default Read address for I2C-It. Const Raddress = &H21 'Units Type (1=inches) (2=cm) (3=Raw) Const Range_inch = 1 Const Range_cm = 2 Const Range_raw = 3 '------------------------------------------------------------------------------- 'Variables Dim Unit As Byte Dim Value As Byte '-------------------------------------------------------------------------------

Do

 'Read and Print to UART
 Call Get_distance(range_cm , Value) : Print Value
 Waitms 500

Loop End

'------------------------------------------------------------------------------- 'Implementation

Sub Get_distance(byval Unit As Byte , Value As Byte)

  I2cstart                                                 'generate start
  I2cwbyte Waddress                                        'write adsress
  I2cwbyte Unit                                            'Unit type
  I2cstart                                                 'repeated start
  I2cwbyte Raddress                                        'read address
  I2crbyte Value , Nack                                    'read byte
  I2cstop                                                  'generate stop

End Sub </source>