Difference between revisions of "Matrix - Button"
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==Introduction== | ==Introduction== | ||
[[File:Btn01.jpg|thumb|按键]] | [[File:Btn01.jpg|thumb|按键]] |
Latest revision as of 04:44, 10 February 2016
Contents
Introduction
- The Matrix-Button module is used to detect button events.
- If the button is not pressed S will output high otherwise S will output low.
Features
- 3 PIN interface
- PCB dimension (mm): 8 x 24
- Pin Description:
Pin | Description |
S | GPIO |
V | Supply Voltage 5V |
G | Ground |
Basic Device Operation
- The Matrix-Button is an instant(non self-lock) button. The button's status can be read from pin S in the 3-pin 2.54 mm spacing pin header.
- If the button is not pressed S will output high otherwise S will output low.
Download Matrix Source Code
All the matrix modules' code samples are open source. They are maintained on GitHub --https://github.com/friendlyarm/matrix.git
Each branch in this hub contains the matrix modules' code samples for a board that the matrix modules can work with.
- The nanopi branch contains the matrix modules' code samples for the NanoPi
- The tiny4412 branch contains the matrix modules' code samples for the Tiny4412
- The raspberrypi branch contains the matrix modules' code samples for the RaspberryPi
Please follow the steps below to get the source code:
Install the git utility on a PC running Ubuntu14.04
$ sudo apt-get install git
Clone the matrix code from GitHub
$ git clone https://github.com/friendlyarm/matrix.git
If this is successful a "matrix" directory will be generated, which will contain all the matrix modules' code samples.
Connect to NanoPi 2
Hardware Connection
Please refer to the following connection diagram to connect the Matrix-Button to the NanoPi 2:
Connection Details:
Matrix-Button | NanoPi 2 |
S | Pin7 |
V | Pin4 |
G | Pin6 |
Compile Test Program
Please login the matrix hub and enter the nanopi2 branch
$ cd matrix
$ git checkout nanopi2
Compile the matrix code
$ make CROSS_COMPILE=arm-linux- clean
$ make CROSS_COMPILE=arm-linux-
$ make CROSS_COMPILE=arm-linux- install
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 NanoPi2.
Generated library files are under the "install/lib" directory. Applications are under the "install/usr/bin" directory. The test program for the "Matrix-Button" module is "matrix-button".
Run Test Program
Please insert a TF card which is flashed with Debian to a Linux host and mount its boot and rootfs sections.
We assume the rootfs is mounted to /media/rootfs then please run the following commands to copy the driver, library and test program to the card.
$ cp modules /media/rootfs/ -r
$ cp install/lib/* /media/rootfs/lib/ -d
$ cp install/usr/bin/* /media/rootfs/usr/bin/
Insert this TF card to your NanoPi 2, power on and run the following commands.
$ cd /modules
$ insmod matrix_gpio_int.ko
Start the matrix-button program
$ matrix-button
Here is what you should expect:
Code Sample
static struct sensor button[] = {
{
GPIO_PIN(7),
IRQ_TYPE_EDGE_FALLING,
}
};
int main(int argc, char ** argv)
{
int i;
int retSize = -1;
char value[ARRAY_SIZE(button)];
int devFD = -1;
if (argc == 2) {
button[0].pin = atoi(argv[1]);
}
printf("Using GPIO_PIN(%d)\n", button[0].pin);
if ((devFD =sensorInit(button, ARRAY_SIZE(button))) == -1) {
printf("Fail to init sensor\n");
return -1;
}
printf("Press the button...\n");
if ((retSize = sensorRead(devFD, value, ARRAY_SIZE(button))) == -1) {
printf("Fail to read sensors\n");
}
if (retSize > 0) {
i = 0;
for (i=0; i<retSize; i++) {
printf("Button[%d]:%d\n", i, value[i]);
}
}
sensorDeinit(devFD);
return 0;
}
Connect to NanoPi
Preparations
Please install a Debian on a NanoPi and an appropriate cross compiler on a PC. Please refer to wiki:NanoPi & How to Build the Compiling Environment
Compile a NanoPi kernel. Note: please use the kernel's source code from the nanopi-v4.1.y-matrix branch.
$ git clone https://github.com/friendlyarm/linux-4.x.y.git
$ cd linux-4.x.y
$ git checkout nanopi-v4.1.y-matrix
$ make nanopi_defconfig
$ touch .scmversion
$ make
A newly generated zImage will be under arch/arm/boot/. You can replace the one under "sd-fuse_nanopi/prebuilt" with this new image file.
Hardware Connection
Please refer to the following connection diagram to connect the Matrix-Button to the NanoPi
Connection Details:
Matrix-Button | NanoPi |
S | Pin7 |
V | Pin4 |
G | Pin6 |
Compile Test Program
Please login the matrix hub and enter the nanopi branch
$ cd matrix
$ git checkout nanopi
Compile the matrix code
$ make CROSS_COMPILE=arm-linux- clean
$ make CROSS_COMPILE=arm-linux-
$ make CROSS_COMPILE=arm-linux- install
Note: please make sure to install the cross compiler "arm-linux-gcc-4.4.3" on your PC, which is used to compile files for the NanoPi-Debian.
Generated library files are under the "install/lib" directory. Applications are under the "install/usr/bin" directory. The test program for the "Matrix-Button" module is "matrix-button".
Run Test Program
Please insert a TF card which is flashed with Debian to a Linux host and mount its boot and rootfs sections.
We assume the rootfs is mounted to /media/rootfs then please run the following commands to copy these files to the card.
$ cp install/lib/* /media/rootfs/lib/ -d
$ cp install/usr/bin/* /media/rootfs/usr/bin/
Insert this TF card to your NanoPi, power on and run the following commands.
$ matrix-button
Code Sample
int main(int argc, char ** argv)
{
int i;
int retSize = -1;
char value[ARRAY_SIZE(button)];
int devFD = -1;
printf("Using pin GPIO_PIN1\n");
if ((devFD =sensorInit(button, ARRAY_SIZE(button))) == -1) {
printf("Fail to init sensor\n");
return -1;
}
printf("Press the button...\n");
if ((retSize = sensorRead(devFD, value, ARRAY_SIZE(button))) == -1) {
printf("Fail to read sensors\n");
}
if (retSize > 0) {
i = 0;
for (i=0; i<retSize; i++) {
printf("Button[%d]:%d\n", i, value[i]);
}
}
sensorDeinit(devFD);
return 0;
}
Connect to Tiny4412
Preparations
Please refer to the Tiny4412's user's manual to install a UbuntuCore on the Tiny4412 and install an appropriate cross compiler on a PC.
Note: only the Tiny4412SDK-1506 carrier board can work with this module.
Hardware Connection
Please refer to the following diagram to connect the Matrix-Button to the Tiny4412
Connection Details:
Matrix-Button | Tiny4412 |
S | GPIO1 S |
V | GPIO1 5V |
G | GPIO1 GND |
Compile Test Program
Please login the Matrix hub and enter the matrix-tiny4412 branch
$ cd matrix
$ git checkout tiny4412
Compile the matrix code
$ make CROSS_COMPILE=arm-linux-gnueabihf- clean
$ make CROSS_COMPILE=arm-linux-gnueabihf-
$ make CROSS_COMPILE=arm-linux-gnueabihf- install
Note: please make sure to install the cross compiler "arm-linux-gnueabihf-gcc-4.7.3" on your PC, which is used to compile files for the Tiny4412-UbuntuCore.
Generated library files are under the "install/lib" directory. Applications are under the "install/usr/bin" directory. The test program for the "Matrix-Button" module is "matrix-button".
Run Test Program
Please insert an SD card which is flashed with UbuntuCore to a Linux host and mount its boot and rootfs sections.
We assume the rootfs is mounted to /media/rootfs then please run the following commands to copy these files the card.
$ cp install/usr/bin/* /media/rootfs/usr/bin/
$ cp install/lib/* /media/rootfs/lib/ -d
Insert this card to your Tiny4412, power on and run the following command to start the Matrix-Button test program。
$ matrix-button
Note: this module is not plug and play therefore before running the module please make sure it is connected to a Tiny4412.
Code Sample
int main(int argc, char ** argv)
{
int i;
int retSize = -1;
char value[ARRAY_SIZE(button)];
int devFD = -1;
printf("Using pin GPIO_PIN1\n");
if ((devFD =sensorInit(button, ARRAY_SIZE(button))) == -1) {
printf("Fail to init sensor\n");
return -1;
}
printf("Press the button...\n");
if ((retSize = sensorRead(devFD, value, ARRAY_SIZE(button))) == -1) {
printf("Fail to read sensors\n");
}
if (retSize > 0) {
i = 0;
for (i=0; i<retSize; i++) {
printf("Button[%d]:%d\n", i, value[i]);
}
}
sensorDeinit(devFD);
return 0;
}