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Download MCS Electronics , 1995-2008 - Departamento de Automatización y
Transcript
BASCOM Language Reference 691 TIMER1 Remarks Togglebit Address Command Make the toggle bit 0 or 32 to set the toggle bit The RC5 address The RC5 command. Normal RC5 code uses 2 leading bits with the value '1'. After that the toggle bit follows. With extended RC5, the second bit is used to select the bank. When you make it 1 (the default and normal RC5) the RC5 code is compatible. When you make it 0, you select bank 0 and thus use extended RC5 code. The resistor must be connected to the OC1A pin. In the example a 2313 micro was used. This micro has pin portB.3 connected to OC1A. Look in a data sheet for the proper pin when used with a different chip. Most audio and video systems are equipped with an infra-red remote control. The RC5 code is a 14-bit word bi-phase coded signal. The two first bits are start bits, always having the value 1. The next bit is a control bit or toggle bit, which is inverted every time a button is pressed on the remote control transmitter. Five system bits hold the system address so that only the right system responds to the code. Usually, TV sets have the system address 0, VCRs the address 5 and so on. The command sequence is six bits long, allowing up to 64 different commands per address. The bits are transmitted in bi-phase code (also known as Manchester code). An IR booster circuit is shown below: See also CONFIG RC5 442 , GETRC5 594 , RC6SEND 692 Example '---------------------------------------------------------------------------------------'name : sendrc5.bas 'copyright : (c) 1995-2005, MCS Electronics 'purpose : code based on application note from Ger Langezaal © 2008 MCS Electronics
