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Application Notes M16C/26A Group Sample Program (Remote Control Transmission/Reception)
1. Summary
This sample program performs remote control transmission/reception by using the Renesas Starter Kit for M16C/26A (R0K33026AS000BE).
Receiver Received data
Transmitter Transmitted data
The extension board used here is a product from PI System Co., Ltd.
2.
Introduction
Microcomputers: M16C26A
The example described in this document applies to the microcomputers listed below:
This sample program runs on the Renesas Starter Kit for M16C/26A (R0K33026AS000BE). Prepare an extension board available for the Renesas Starter Kit or create a circuit similar to the one shown in the circuit diagram on page 15 and then connect it to the Starter Kit. This program uses RSK_LIB. For details about RSK_LIB, see the RSK_LIB reference manual. (RSK_LIB is the library software provided for use with the Renesas Starter Kit for M16C/26A.)
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3.
Port Arrangement
The key matrix, infrared-ray transmitter/receiver and the buzzer are the facilities mounted on an extension board for the Renesas Starter
Kit. To use these facilities, connect an extension board to the Starter Kit. LCD P74 P91 P90 P63 P62 P77 P104 P105 P106 P107 10MHz Xin
P80/TA4OUT
LCD E LCD R LCD D7 LCD D6 LCD D5 LCD D4
keymatrix
P75 P76
I R - TR ANS RCV -
P61 P60
P82/INT0
M30260F8AGP
4.
Remote Control Specification
4.1 Remote Control Format
10ms
10ms
Data section
Leader section 100ms
D0
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
Remote control data Data section
Inverted remote control data
Data "0"
Data "1"
1ms Per-bit waveform
1ms
1ms
3ms
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4.2 Determination of the Leader and Data Sections
When the received waveform falls within one of the ranges shown below, it is determined to be a leader or a data section. Leader section
Leader low-level duration (10 ms) 8ms - 12ms
Leader pulse width (20 ms)
18ms - 22ms
Data section
Data "0" (2ms) 1.0ms - 3.0ms
Data "1" (4ms) 3.0ms - 5.0ms
4.3 Carrier Frequency
38.46kHz
13us
13us
26us
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5.
Operational Outline
Each time a switch is depressed, the buzzer is sounded and remote control code is transmitted from the infrared LED. The transmitted code is received in the remote control photodetector, and the received data is shown on liquid crystal display.
Liquid crystal display (LCD)
Liquid crystal display (LCD)
Infrared LED M16C26A Code: 00H
Remote control photodetector M16C26A
Remote control transmission
Remote control reception
The operation described above is accomplished using the following microcomputer facilities: * Timer A0 (timer mode, main 2 ms cycle) This timer counts 2 milliseconds using the main clock of the microcomputer as the count source. It is used as the basic timer of RSK_LIB. Time management, key scan and LCD display management are performed using this timer. * Timer A4 (timer mode, carrier output) This timer counts 26 microseconds using the main clock of the microcomputer as the count source. It generates a carrier (frequency 38.46 kHz) that is output during transmission. * Timer B0 (timer mode, remote control transmission "500 s") This timer counts 500 microseconds using the main clock of the microcomputer as the count source. It turns carrier output on and off in a 500 microsecond cycle to generate a remote control transmission waveform. * Timer B2 (timer mode, remote control reception "250 s") This timer counts 250 microseconds using the main clock of the microcomputer as the count source. It generates remote control receive data from the port input level in a 250 microsecond cycle. * Timer A1 (pulse modulation mode, buzzer output) This timer outputs a waveform with different high and low pulse widths using the main clock of the microcomputer as the count source. It is used to sound a buzzer each time a key is touched.
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6. Operational Specification
When a switch is depressed, the remote control code (hex code) corresponding to the switch and the inverted data (hex code) of the remote control code are transmitted. While a switch is held down, data is transmitted successively at 100 millisecond intervals.
Note: In this program, pressing two or more switches at the same time has no effect (i.e., ignored). (1) Immediately after the reset switch is depressed, the LCD shows "-----." (2) While remote control code is being received, the LCD shows the received code. * If the length of reception period is less than or equal to 500 ms, the received code is displayed for 500 ms. (1) Reset switch depressed
I R - TR ANS RCV -
(2) Reception underway (e.g., SW3 held down)
I R - TR ANS RCV 0 1- F E
(3) 500 ms after reception
I R - TR ANS RCV -
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7. Definition of the RSK Functionality and the RSK_LIB APIs and Common Functions Used by Remote Control Transmission/Reception
7.1 Definition of the RSK Functionality
RSKdefine.h file In this application, the following functionalities (those shown in red) are set. /********************************************************* The boot information on CPU is defined Usually, this mode is used *********************************************************/ #define _CPU_M16C26A_NORMAL_MOD /* Use in low power mode can be performed. */ //#define _CPU_M16C26A_32KHZ_MOD /* Use of access of a flash can be performed. */ //#define _CPU_M16C26A_DATAFLASF_USE /******************************************************** The hardware function which RSK supports is chosen /********************************************************/ #define _USE_KEY #define _USE_BUZZER //#define _OPTION_USE_AD //#define _OPTION_USE_COM_RX //#define _OPTION_USE_COM_TX #define _OPTION_USE_INFRAEDRX #define _OPTION_USE_INFRAEDTX //#define _OPTION_USE_SW //#define _OPTION_USE_LED //#define _OPTION_USE_IO Individual definition of each selected functionality #if defined _USE_KEY /* A key matrix continues pushing and existence is defined.*/ /*When not using -USE_KEY_CONTINU is made a comment. */ #define _USE_KEY_CONTINU #if defined _USE_KEY_CONTINU #define _CONTINU_SW1 _KEY_CONTEINU_ON #define _CONTINU_SW2 _KEY_CONTEINU_ON #define _CONTINU_SW3 _KEY_CONTEINU_ON #define _CONTINU_SW4 _KEY_CONTEINU_ON #define _CONTINU_SW5 _KEY_CONTEINU_ON #define _CONTINU_SW6 _KEY_CONTEINU_ON #define _CONTINU_SW7 _KEY_CONTEINU_ON #define _CONTINU_SW8 _KEY_CONTEINU_ON #define _CONTINU_SW9 _KEY_CONTEINU_ON #define _CONTINU_SW10 _KEY_CONTEINU_ON #define _CONTINU_SW11 _KEY_CONTEINU_ON #define _CONTINU_SW12 _KEY_CONTEINU_ON #define _CONTINU_SW13 _KEY_CONTEINU_ON #define _CONTINU_SW14 _KEY_CONTEINU_ON #define _CONTINU_SW15 _KEY_CONTEINU_ON #define _CONTINU_SW16 _KEY_CONTEINU_ON #else
Continuous key depressions are accepted.
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7.2 APIs and Common Functions Used
ApiStatusType RL_SetTimerReq( unsigned int TimerValue, char TimerMode, int *TimerNo, int *ERcode ); ApiStatusType RL_StartTimer( int TimerNo, int *ERcode ); ApiStatusType RL_CheckTimer( int TimerNo, int *ERcode ); ApiStatusType RL_Get_Key( int *Inkey, int *ERcode ); ApiStatusType RL_Getc_Ir( int *IrCode, int *ERcode ); ApiStatusType RL_Putc_Ir( int IrCode, int *ERcode ); ApiStatusType RL_Start_Buzzer( char freqNo, int *ERcode ); ApiStatusType RL_Stop_Buzzer( int *ERcode ); ApiStatusType RL_Putc_Lcd( char Ylocation, char outc, int *ERcode ); ApiStatusType RL_Puts_LcdLoc( char Xlocation, char Ylocation, char RvTime, const char far* outc, int *ERcode ); ApiStatusType RL_Putc_LcdLoc( char Xlocation, char Ylocation, char RvTime, char outc, int *ERcode ); void RL_ErrorHook( int FuncNo, int ErrorNo );
For details about the APIs and common functions used by the sample program (remote control transmission/reception), see the Renesas Starter Kit Library V.1.00 Reference Manual.
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8.
Flowchart
Remote control transmission/recept
Clear display on LCD
Show the initial screen
Request timer setup
Start timers
Input keys
Process buzzer
Keys input?
NO
YES Transmit key code
Check reception
Check reception
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9. Tutorial
Launch the HEW by double-clicking its icon.
Change the session name from "default Session" to "SessionM16C_E8_System."
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Select "M30260F8A" for Device. Select "Download emulator firmware" for Mode.
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Check the box labeled "Power supply is carried out. (MAX 300mA)" and then select "5.0V."
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In the program and the work RAM text boxes of Firmware Location Address, enter "FA0" and "0B8" respectively. Leave the box labeled "Debug a program using the WDT" unchecked.
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Choose Download from the Debug tab and download a module. The upper-side choices for Download show the location from which a project was downloaded.
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Click "Start after Reset" to start program execution.
Please do "Cancellation" when "The file is opened" window opens.
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10. Circuit Diagram
11. Part List
Part name Remote control photodetector Infrared LED Transistor Tact switch Switching diode Electrolytic capacitor Chip Chip Chip resistor resistor resistor LED1 Q1 SW1 SW16 D2 C1 R1 R2 R5 D5 4 1 1 1 1 ROHM Panasonic ROHM ROHM Panasonic 1SS355TE-17 ECE-V1HS010SR MCR10EZHF470 MCR10EZHF561 ERJ-1TRQJ6R8U 1uF/50V 47 560 6.8 1/8W, 1%(5% also acceptable) 1/8W, 1%(5% also acceptable) 1W,5% 1 1 16 Panasonic ROHM OMRON LNA2801L 2SD1898T100Q B3FS-1000P 1A/0.5W Part No. U1 Q'ty 1 Manufacturer SHARP Type number GP1UM281YK Value Remark 38kHz
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12.
Web Sitet
Renesas Technology Web site
http://www.renesas.com/
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Revision History
Rev. 1.00 1.10 Date of issue 2006.06.30 2007.12.03 Content of revision Page First revision issued RSK_LIB APIs supported Points
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