Difference between revisions of "Matrix - IR Receiver"

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==Basic Device Operation==
 
==Basic Device Operation==
−
*红外接收头内部包括红外监测二极管、放大器、限副器、带通滤波器、积分电路、比较器等。红外监测二极管检测到红外信号，然后把信号送到放大器和限幅器，限幅器把脉冲幅度控制在一定的水平，而不论红外发射器和接收器的距离远近。交流信号进入带通滤波器（带通滤波器可以通过30khz到60khz的负载波），再通过解调电路和积分电路进入比较器，比较器输出高低电平，还原出发射端的信号波形。
+
*The IR receiver contains a photo diode, amplifier, band pass filter, integrator, hysteresis comparator and etc. When the IR receiver detects infrared signals it sends them to the preamplifier and band pass filter. After the signals are processed by the band pass filter (30KHz ~ 60KHz) they will be further processed by the integrator and comparator and finally be output as High or Low.
−
*注意:输出的高低电平和发射端是反相的，这样的目的是为了提高接收的灵敏度。
+
*Note: the output signal is the reversal of the input signal.
  
 +
==Applications==
 +
===Connect to NanoPi M1===
 +
Refer to the following connection diagram to connect the module to the NanoPi M1:<br>
 +
[[File:Matrix-IR_Receiver_nanopi_m1.jpg|frameless|600px|Matrix-IR_Receiver_nanopi_m1]]
 +
 +
Connection Details:
 +
{| class="wikitable"
 +
|-
 +
|Matrix-IR_Receiver || NanoPi M1
 +
|-
 +
|S    || Pin7
 +
|-
 +
|V    || Pin4
 +
|-
 +
|G    || Pin6
 +
|}
 +
 +
===Connect to NanoPi 2===
 +
Refer to the following connection diagram to connect the module to the NanoPi 2:<br>
 +
[[File:Matrix-IR_Receiver_nanopi_2.jpg|frameless|600px|Matrix-IR_Receiver_nanopi_2]]
 +
 +
Connection Details
 +
{| class="wikitable"
 +
|-
 +
|Matrix-IR_Receiver || NanoPi 2
 +
|-
 +
|S    || Pin7
 +
|-
 +
|V    || Pin4
 +
|-
 +
|G    || Pin6
 +
|}
 +
 +
===Connect to NanoPi M2 / NanoPi 2 Fire===
 +
Refer to the following connection diagram to connect the module to the NanoPi M2/ NanoPi 2 Fire:<br>
 +
[[File:Matrix-IR_Receiver_nanopi_m2.jpg|frameless|600px|Matrix-IR_Receiver_nanopi_m2]]
 +
 +
Connection Details:
 +
{| class="wikitable"
 +
|-
 +
|Matrix-IR_Receiver || NanoPi M2
 +
|-
 +
|S    || Pin7
 +
|-
 +
|V    || Pin4
 +
|-
 +
|G    || Pin6
 +
|}
 +
 +
===Connect to NanoPC-T2===
 +
Refer to the following connection diagram to connect the module to the NanoPC-T2:<br>
 +
[[File:Matrix-IR_Receiver_NanoPC-T2.jpg|frameless|600px|Matrix-IR_Receiver_NanoPC-T2]]
 +
 +
Connection Details:
 +
{| class="wikitable"
 +
|-
 +
|Matrix-IR_Receiver || NanoPC-T2
 +
|-
 +
|S    || Pin15
 +
|-
 +
|V    || Pin29
 +
|-
 +
|G    || Pin30
 +
|}
 +
 +
==Compile & Run Test Program==
 +
Boot your ARM board with Debian and copy the matrix code:
 +
<syntaxhighlight lang="bash">
 +
$ apt-get update && apt-get install git
 +
$ git clone https://github.com/friendlyarm/matrix.git
 +
</syntaxhighlight>
 +
If your cloning is done successfully a "matrix" directory will be generated.
 +
 +
Compile and install Matrix:
 +
<syntaxhighlight lang="bash">
 +
$ cd matrix
 +
$ make && make install
 +
</syntaxhighlight>
 +
 +
Run test program:
 +
<syntaxhighlight lang="bash">
 +
$ matrix-ir_receiver
 +
</syntaxhighlight>
 +
Note: this module is not plug and play therefore before running the module please make sure it is connected to an ARM board.<br>
 +
Here is what you should observe:<br>
 +
<syntaxhighlight lang="bash">
 +
Press the IR remoter
 +
0: Type=4, Code=4, Value=3b0d
 +
1: Type=0, Code=0, Value=0
 +
2: Type=4, Code=4, Value=3b12
 +
3: Type=0, Code=0, Value=0
 +
4: Type=4, Code=4, Value=3b15
 +
5: Type=0, Code=0, Value=0
 +
</syntaxhighlight>
 +
When you point our RC-100 controller to it and press any key on the controller an event will be detected.
 +
 +
==Code Sample==
 +
This Matrix code sample can work with all the ARM boards mentioned in this module's wiki. The name of this code sample is "matrix-ir_receiver". Here is its source code:
 +
<syntaxhighlight lang="c">
 +
int main(int argc, char ** argv)
 +
{
 +
    int board, i, j;
 +
    int retSize = -1;
 +
    char *devName = GPIO_IR_DEV;
 +
    int pin = GPIO_PIN(7);
 +
    char modStr[BUF_SIZE];
 +
    struct input_event evKey;
 +
   
 +
    if ((board = boardInit()) < 0) {
 +
        printf("Fail to init board\n");
 +
        return -1;
 +
    }
 +
    if (board == BOARD_NANOPI_T2)
 +
        pin = GPIO_PIN(15);
 +
   
 +
    sprintf(modStr, "modprobe %s gpio=%d", DRIVER_MODULE, pintoGPIO(pin));
 +
    system(modStr);
 +
    signal(SIGINT, IRIntHandler);
 +
    sleep(1);
 +
    irFD = openHW(devName, O_RDWR);
 +
    if (irFD < 0) {
 +
        printf("Fail to open GPIO IR device\n");
 +
        goto err;
 +
    }
 +
    printf("Press the IR remoter\n");
 +
    for (i=0; i<IR_EVENT_TIMES; i++) {
 +
        if (selectHW(irFD, 0, 0) == 1) {
 +
            retSize = readHW(irFD, &evKey, sizeof(struct input_event));
 +
            for (j=0; j<(int) retSize / sizeof(struct input_event); j++)
 +
                printf("%2d: Type=%d, Code=%d, Value=%x\n", i, evKey.type, evKey.code, evKey.value);
 +
        }
 +
    }
 +
    closeHW(irFD);
 +
err:
 +
    system("rmmod "DRIVER_MODULE);
 +
    return 0;
 +
}
 +
</syntaxhighlight>
 +
For more details about this APIs called in this code sample refer to [[Matrix API reference manual]] <br>
 +
 +
 +
<!---
 
==Download Matrix Source Code==
 
==Download Matrix Source Code==
  
Line 81: Line 223:
 
</syntaxhighlight>
 
</syntaxhighlight>
 
Note: please make sure to install the cross compiler "arm-linux-gcc-4.9.3" on your PC, which is used to compile files for the NanoPi 2.<br>
 
Note: please make sure to install the cross compiler "arm-linux-gcc-4.9.3" on your PC, which is used to compile files for the NanoPi 2.<br>
−
Generated library files are under the "install/lib" directory. The test program is under the "install/usr/bin" directory. The modules are under the "modules" directory.<br>
+
Generated library files are under the "install/lib" directory. The test program is under the "install/usr/bin" directory. <br>
 +
The modules are under the "modules" directory. The driver's source code is in github: https://github.com/friendlyarm/linux-3.4.y.git <br>
  
 
===Run Test Program===
 
===Run Test Program===
Line 116: Line 259:
  
 
==Connect to Arduino==
 
==Connect to Arduino==
 +
--->
  
 
==Resources==
 
==Resources==
 +
 +
==Update Log==
 +
===Feb-24-2016===
 +
* Added the driver's source code location in Section 5.2
 +
 +
===June-21-2016===
 +
* Re-organized and simplified wiki

Latest revision as of 01:31, 21 June 2016

查看中文

1 Introduction

IR Receiver
  • The Matrix-IR receiver is a 38KHz infrared receiver that receives 38KHz signals from an infrared remote control, amplifies and filers them to other devices. Its signal decoding is implemented by programming MCU.
  • Transmission distance: 12 ~ 13 meters.

2 Features

  • GPIO control, 3.3/5V
  • Small
  • 2.54mm spacing pin header
  • PCB Dimension(mm): 8 x 24

IR Receiver.PCB

  • Pin Description:
Pin Description
S GPIO
V Supply Voltage 5V
G Ground

3 Basic Device Operation

  • The IR receiver contains a photo diode, amplifier, band pass filter, integrator, hysteresis comparator and etc. When the IR receiver detects infrared signals it sends them to the preamplifier and band pass filter. After the signals are processed by the band pass filter (30KHz ~ 60KHz) they will be further processed by the integrator and comparator and finally be output as High or Low.
  • Note: the output signal is the reversal of the input signal.

4 Applications

4.1 Connect to NanoPi M1

Refer to the following connection diagram to connect the module to the NanoPi M1:
Matrix-IR_Receiver_nanopi_m1

Connection Details:

Matrix-IR_Receiver NanoPi M1
S Pin7
V Pin4
G Pin6

4.2 Connect to NanoPi 2

Refer to the following connection diagram to connect the module to the NanoPi 2:
Matrix-IR_Receiver_nanopi_2

Connection Details

Matrix-IR_Receiver NanoPi 2
S Pin7
V Pin4
G Pin6

4.3 Connect to NanoPi M2 / NanoPi 2 Fire

Refer to the following connection diagram to connect the module to the NanoPi M2/ NanoPi 2 Fire:
Matrix-IR_Receiver_nanopi_m2

Connection Details:

Matrix-IR_Receiver NanoPi M2
S Pin7
V Pin4
G Pin6

4.4 Connect to NanoPC-T2

Refer to the following connection diagram to connect the module to the NanoPC-T2:
Matrix-IR_Receiver_NanoPC-T2

Connection Details:

Matrix-IR_Receiver NanoPC-T2
S Pin15
V Pin29
G Pin30

5 Compile & Run Test Program

Boot your ARM board with Debian and copy the matrix code: 

$ apt-get update && apt-get install git
$ git clone https://github.com/friendlyarm/matrix.git

If your cloning is done successfully a "matrix" directory will be generated.

Compile and install Matrix: 

$ cd matrix
$ make && make install

Run test program: 

$ matrix-ir_receiver

Note: this module is not plug and play therefore before running the module please make sure it is connected to an ARM board.
Here is what you should observe:

Press the IR remoter
 0: Type=4, Code=4, Value=3b0d
 1: Type=0, Code=0, Value=0
 2: Type=4, Code=4, Value=3b12
 3: Type=0, Code=0, Value=0
 4: Type=4, Code=4, Value=3b15
 5: Type=0, Code=0, Value=0

When you point our RC-100 controller to it and press any key on the controller an event will be detected.

6 Code Sample

This Matrix code sample can work with all the ARM boards mentioned in this module's wiki. The name of this code sample is "matrix-ir_receiver". Here is its source code: 

int main(int argc, char ** argv)
{
    int board, i, j;
    int retSize = -1;
    char *devName = GPIO_IR_DEV;
    int pin = GPIO_PIN(7);
    char modStr[BUF_SIZE];
    struct input_event evKey;
 
    if ((board = boardInit()) < 0) {
        printf("Fail to init board\n");
        return -1;
    }
    if (board == BOARD_NANOPI_T2)
        pin = GPIO_PIN(15);
 
    sprintf(modStr, "modprobe %s gpio=%d", DRIVER_MODULE, pintoGPIO(pin));
    system(modStr);
    signal(SIGINT, IRIntHandler);
    sleep(1);
    irFD = openHW(devName, O_RDWR);
    if (irFD < 0) {
        printf("Fail to open GPIO IR device\n");
        goto err;
    }
    printf("Press the IR remoter\n");
    for (i=0; i<IR_EVENT_TIMES; i++) {
        if (selectHW(irFD, 0, 0) == 1) {
            retSize = readHW(irFD, &evKey, sizeof(struct input_event));
            for (j=0; j<(int) retSize / sizeof(struct input_event); j++)
                printf("%2d: Type=%d, Code=%d, Value=%x\n", i, evKey.type, evKey.code, evKey.value);
        }
    }
    closeHW(irFD);
err:
    system("rmmod "DRIVER_MODULE);
    return 0;
}

For more details about this APIs called in this code sample refer to Matrix API reference manual


7 Resources

8 Update Log

8.1 Feb-24-2016

  • Added the driver's source code location in Section 5.2

8.2 June-21-2016

  • Re-organized and simplified wiki
Retrieved from "https://wiki.friendlyelec.com/wiki/index.php?title=Matrix_-_IR_Receiver&oldid=6131"