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AN #105 - Sending RC5 and SONY IR codes Print
Sending RC5 and SONY IR codes

This application note was submitted by Ger Langezaal.

Actually there are 2 notes. One for sending RC5 codes and one for sending Sony.

Since BASCOM already has the GETRC5 statement, it is now easy to create an IR remote control! Based on Ger's AN there will also be a build in SENDRC5 statement.

Download botch source codes in .ZIP file

Ger is willing to asnwer some questions and of course it is also nice to send him a 'thanks' email but before you start with questions, be sure that you have a receiver that works ok.

You can build a simple receiver with the GETRC5 statement from BASCOM-AVR.

rc5 code


'-------------------------------------------------------------------------------
' Filename : RC5_Tx1a.bas
' Purpose : RC5 Remote Control Transmitter
' Author : Ger langezaal
' Controller : AT90S2313
' Compiler : BASCOM-AVR Rev. 1.11a
'-------------------------------------------------------------------------------
'
' connections 3x4 Keypad:
'
' column 1 ------------------[470 Ohm]---> Pb.0
' column 2 | ------------[470 Ohm]---> Pb.1
' column 3 | | ------[470 Ohm]---> Pb.2
' | | |
'
' row 1 1 2 3 ---[470 Ohm]---> Pb.4
' row 2 4 5 6 ---[470 Ohm]---> Pb.5
' row 3  7 8 9 ---[470 Ohm]---> Pb.6
' row 4 * 0 # ---[470 Ohm]---> Pb.7
'
' IR Led: +5V <---[A Led K]---[220 Ohm]---> Pb.3
'
'-------------------------------------------------------------------------------
'
$regfile = "2313def.dat"
$crystal = 8000000

Dim Rc5_address As Byte
Dim Rc5_command As Byte
Dim Key As Byte
Dim Key_prev As Byte
Dim Rc5_bit_nr As Byte
Dim Toggle_bit As Boolean

' 36kHz carrier reload value
'Const T_oc1 = 55 'value for 4MHz crystal
Const T_oc1 = 110 'value for 8MHz crystal
'Const T_oc1 = 138 'value for 10MHz crystal

Const Carrier_on = &B01000000 'IR 36kHz carrier on
Const Carrier_off = &B11000000 'IR 36kHz carrier off

Config Kbd = Portb 'keyboard connected at Port b
Config Timer1 = Timer , Prescale = 1 , Compare A = Toggle , Clear Timer = 1
Timer1 = 0
Compare1a = T_oc1 'Pb.3 = OC1 = IR carrier output 36 kHz

Declare Sub Logic_0
Declare Sub Logic_1

Tccr1a = Carrier_off
Toggle_bit
= 0

'---[ set RC-5 System Address ]-------------------------------------------------

Rc5_address
= 0 'TV = 0
'Rc5_address = 5 'VCR = 5
'Rc5_address = 20 'CD = 20

'---[ main program loop ]-------------------------------------------------------

Do
 Key
= Getkbd() 'get keyboard value
 
Waitms 1 'small delay
 
If Key <> 16 Then 'test if key is pressed else key = 16
 
If Key_prev <> Key Then Toggle_bit = Not Toggle_bit 'set toggle bit
 Rc5_command
= Lookup(key , Rc5_commands) 'get RC-5 command

'---[ transmit Address and Command as 14 bit RC-5 code ]------------------------
 
Ddrb.3 = 1 'set OC1 (Pb.3) = IR carrier output
 Logic_1 
'first start bit
 Logic_1 
'second start bit
 
If Toggle_bit = 0 Then Logic_0 Else Logic_1 'toggle bit

 
For Rc5_bit_nr = 4 To 0 STEP -1 '5 bit address, msb first
 
If Rc5_address.rc5_bit_nr = 0 Then Logic_0 Else Logic_1
 
Next

 
For Rc5_bit_nr = 5 To 0 STEP -1 '6 bit command, msb first
 
If Rc5_command.rc5_bit_nr = 0 Then Logic_0 Else Logic_1
 
Next

 
Tccr1a = Carrier_off
 
Waitms 87 'frame gap delay
 
End If
 Key_prev
= Key 'save last key value
Loop

End

'-------------------------------------------------------------------------------

Sub Logic_0
 
Tccr1a = Carrier_on
 
Waitus 883
 
Tccr1a = Carrier_off
 
Waitus 884
End Sub

Sub Logic_1
 
Tccr1a = Carrier_off
 
Waitus 883
 
Tccr1a = Carrier_on
 
Waitus 884
End Sub

Rc5_commands
:
Data 1 , 2 , 3 , 0 'column 4 not used (3x4 keypad)
Data 4 , 5 , 6 , 0
Data 7 , 8 , 9 , 0
Data 10 , 11 , 12 , 0

'---[ Keyboard layout example ]-------------------------------------------------
'
' key command key command key command
' 1 = 1 2 = 2 3 = 3
' 4 = 4 5 = 5 6 = 6
' 7 = 7 8 = 8 9 = 9
' * = 10 0 = 11 # = 12
'
'-------------------------------------------------------------------------------
'
' for more RC-5 Remote Control info:
' http://users.pandora.be/nenya/electronics/rc5/index.htm
' http://www.ustr.net/infrared/infrared1.shtml
'
'-------------------------------------------------------------------------------

sony code

'-------------------------------------------------------------------------------
' Filename : Sony_RC_Tx1a.bas
' Purpose : IR Remote Control Transmitter for SONY devices
' Author : Ger langezaal
' Controller : AT90S2313
' Compiler : BASCOM-AVR Rev. 1.11a
'-------------------------------------------------------------------------------
'
' connections 3x4 Keypad:
'
' column 1 ------------------[470 Ohm]---> Pb.0
' column 2 | ------------[470 Ohm]---> Pb.1
' column 3 | | ------[470 Ohm]---> Pb.2
' | | |
'
' row 1 1 2 3 ---[470 Ohm]---> Pb.4
' row 2 4 5 6 ---[470 Ohm]---> Pb.5
' row 3 7 8 9 ---[470 Ohm]---> Pb.6
' row 4 * 0 # ---[470 Ohm]---> Pb.7
'
' IR Led:  +5V <---[A Led K]---[220 Ohm]---> Pb.3
'
'-------------------------------------------------------------------------------

$regfile = "2313def.dat"
$crystal = 8000000

Dim Key As Byte
Dim Ir_frame As Byte
Dim Ir_bit As Byte
Dim Ir_data As Word

'40 kHz carrier reload value
'Const T_oc1 = 49 'value for 4MHz crystal
Const T_oc1 = 99 'value for 8MHz crystal
'Const T_oc1 = 124 'value for 10MHz crystal

Const Carrier_on = &B01000000 'IR 40kHz carrier on
Const Carrier_off = &B11000000 'IR 40kHz carrier off

Const Ir_repeat = 3 'number code frames (at least 2)

Config Kbd = Portb 'keyboard connected at Port b
Config Timer1 = Timer , Prescale = 1 , Compare A = Toggle , Clear Timer = 1
Timer1 = 0
Compare1a = T_oc1 'OC1 = IR carrier = 40 kHz

Tccr1a = Carrier_off

'---[ main program loop ]-------------------------------------------------------

Do
 Key
= Getkbd()
 
Waitms 1 'small delay
 
If Key <> 16 Then 'test if key is pressed else key=16
 Ir_data
= Lookup(key , Ir_code) 'lookup pressed key IR Remote Code
 
Ddrb.3 = 1 'set OC1 (Pb.3) = IR carrier output

'---[ convert and transmit Sony 12bit IR code ]---------------------------------

 
For Ir_frame = 1 To Ir_repeat 'number of code frames
 
Tccr1a = Carrier_on
 
Waitus 2400 'start = 2.4mS
 
For Ir_bit = 11 Downto 0 '12 bit code, msb first
 
Tccr1a = Carrier_off
 
Waitus 600 '0.6mS delay
 
Tccr1a = Carrier_on
 
Waitus 600  '0.6mS delay
 
If Ir_data.ir_bit = 1 Then Waitus 600 'if bit=1 then 1.2mS delay
 
Next
 
Tccr1a = Carrier_off
 
Waitms 25 'frame gap 25mS delay
 
Next
 
End If
Loop

'-------------------------------------------------------------------------------
End
'-------------------------------------------------------------------------------

Ir_code
:
Data &H1D1% , &H9D1% , &H4D1% , &H0% 'column 4 not used (3x4 keypad)
Data &HCD1% , &H2D1% , &HB91% , &H0%
Data &H0D1% , &H8D1% , &HAD1% , &H0%
Data &HBD1% , &H7D1% , &HA91% , &H0%

'---[ Keyboard layout example for CD Player Remote Control ]--------------------
'
' key command key command key command
' 1 = stop 2 = pause 3 = play
' 4 = << 5 = >> 6 = continue
' 7 = |<< 8 = >>| 9 = shuffle
' * = disc - 0 = disc + # = power
'
'-------------------------------------------------------------------------------

'---[ SONY CD Infrared Remote Control codes (RM-DX55) ]-------------------------
'
' Hex code Binary code
' msb lsb
' power = &HA91 : 1010 1001 0001
' play = &H4D1 : 0100 1101 0001
' stop = &H1D1 : 0001 1101 0001
' pause = &H9D1 : 1001 1101 0001
' continue = &HB91 : 1011 1001 0001
' shuffle = &HAD1 : 1010 1101 0001
' program = &HF91 : 1111 1001 0001
' disc = &H531 : 0101 0011 0001
' 1 = &H011 : 0000 0001 0001
' 2 = &H811 : 1000 0001 0001
' 3 = &H411 : 0100 0001 0001
' 4 = &HC11 : 1100 0001 0001
' 5 = &H211 : 0010 0001 0001
' 6 = &HA11 : 1010 0001 0001
' 7 = &H611 : 0110 0001 0001
' 8 = &HE11 : 1110 0001 0001
' 9 = &H111 : 0001 0001 0001
' 0 = &H051 : 0000 0101 0001
' >10 = &HE51 : 1110 0101 0001
' enter = &HD11 : 1101 0001 0001
' clear = &HF11 : 1111 0001 0001
' repeate = &H351 : 0011 0101 0001
' disc - = &HBD1 : 1011 1101 0001
' disc + = &H7D1 : 0111 1101 0001
' |<< = &H0D1 : 0000 1101 0001
' >>| = &H8D1 : 1000 1101 0001
' << = &HCD1 : 1100 1101 0001
' >> = &H2D1 : 0010 1101 0001
'
'---[ SONY Cassette Infrared Remote Control codes (RM-J901) ]-------------------
'Deck A:
' stop = &H1C1 : 0001 1100 0001
' play > = &H4C1 : 0100 1100 0001
' play < = &HEC1 : 1110 1100 0001
' >> = &H2C1 : 0010 1100 0001
' << = &HCC1 : 1100 1100 0001
' record = &H6C1 : 0110 1100 0001
' pause = &H9C1 : 1001 1100 0001
'Deck B:
' stop = &H18E : 0001 1000 1110
' play > = &H58E : 0101 1000 1110
' play < = &H04E : 0000 0100 1110
' >> = &H38E : 0011 1000 1110
' << = &HD8E : 1101 1000 1110
' record = &H78E : 0111 1000 1110
' pause = &H98E : 1001 1000 1110
'
'---[ SONY TV Infrared Remote Control codes (RM-694) ]--------------------------
'
' program + = &H090 : 0000 1001 0000
' program - = &H890 : 1000 1001 0000
' volume + = &H490 : 0100 1001 0000
' volume - = &HC90 : 1100 1001 0000
' power = &HA90 : 1010 1001 0000
' sound on/off = &H290 : 0010 1001 0000
' 1 = &H010 : 0000 0001 0000
' 2 = &H810 : 1000 0001 0000
' 3 = &H410 : 0100 0001 0000
' 4 = &HC10 : 1100 0001 0000
' 5 = &H210 : 0010 0001 0000
' 6 = &HA10 : 1010 0001 0000
' 7 = &H610 : 0110 0001 0000
' 8 = &HE10 : 1110 0001 0000
' 9 = &H110 : 0001 0001 0000
' 0 = &H910 : 1001 0001 0000
' -/-- = &HB90 : 1011 1001 0000
'
'-------------------------------------------------------------------------------
'
' for more SONY Remote Control info:
'
' http://www.fet.uni-hannover.de/purnhage/
'
'-------------------------------------------------------------------------------