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AN4099 датащи(PDF) 34 Page - STMicroelectronics

номер детали AN4099
подробное описание детали  Implementing transmitters and receivers for infrared remote control protocols using STM32F0xx and STM32F3xx microcontrollers
PDF  39 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4099 датащи(HTML) 34 Page - STMicroelectronics

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Interface layer
AN4099
34/39
Doc ID 023110 Rev 2
5.
Define a structure for the IR protocol in the file main.c.
Example:
RC5_Frame_TypeDef
IR_FRAME.
6.
Call the decoding function in main().
Example:
void main(void)
{
RC5_Init();
while(1)
{
RC5_Decode(&IR_Frame).
}
}
Changes needed to support any IR protocol
You can use this solution to support any infrared protocol by making only a few changes in
the header file and updating the command and device tables.
– Create a header file (exp: ir_protocol_name.h) similar to the sirc_decode.h file.
Change the defines to adapt it to the specifications of the chosen IR protocol (bit
duration min/max, header duration min/max, total bits number, timeout...)
Table 6.
List of defines in the header file for the IR protocol parameters
Defines
Meaning
Example settings for
SIRC protocol
IR_Time_OUT_US
Timeout in µs
4050
IR_BITS_COUNT
Number of bits
11
IR_TOTAL_BITS _COUNT
Total number of bits
11
IR_ONTIME_MIN_US
Min low pulse in µs
(600 - 60)
IR_ONTIME_MAX_US
Max low pulse in µs
(1200 + 60)
IR_HEADER_LOW_MIN_US
Min header low pulse in µs
(2400 - 150)
IR_HEADER_LOW_MAX_US
Max header low pulse in µs
(2400 + 150)
IR_HEADER_WHOLE_MIN_US
Min header whole duration in µs
(2400 + 600 - 60)
IR_HEADER_WHOLE_MAX_US
Max header whole duration in µs
(2400 + 600 + 60)
IR_VALUE_STEP_US
Step value between bit0 and bit1 in
µs
600



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