View source for Ks0210 keyestudio RPI TTP229L 16-key Capacitive Touch Keypad



<br>
==Introduction==
This keypad is designed for Raspberry Pi and supplies your Pi with 16 keys. It has an I2C communication mode and uses 3.3 V supply voltage with a power indicator. <br>
We provide you with installation package, source codes and a document to help you complete your programs.<br>
<br>[[File:Ks0210-11.png|500px|frameless|thumb]]<br>

<br>

==Specification==
* Chip: TTP229-LSF 
* Supply Voltage: 3.3V
* Interface: I2C

<br>
== Shipping List ==
* keyestudio RPI TTP229L 16-key Capacitive Touch Keypad x1
* M2.5*6MM screw x 6
* M2.5*19MM copper pillar x 3

<br>[[File:Ks0210-12.png|600px|frameless|thumb]]<br>


<br>

==Connection Diagram ==
Plug it directly into Raspberry Pi to start your works as shown in below figure.<br>  After power-on have about 0.5sec stable-time. During the time do not touch the key pad, and all functions are disabled.
<br>[[File:Ks0210-13.png|500px|frameless|thumb]]<br>

<br>
==Sample Code==
<pre>
 #include <bcm2835.h>  
    #include <stdio.h>
    #include <unistd.h>
    unsigned char WriteBuf;
    unsigned char WriteBuf1;  
    unsigned int ReadBuf0;  

    int main(int argc, char **argv)  
    {  
        if (!bcm2835_init())  
        return 1;  
        bcm2835_i2c_begin();  
        bcm2835_i2c_setSlaveAddress(0x57);  
        bcm2835_i2c_set_baudrate(10000);  
        printf("start..........\n"); 

        while(1)  
        {  
		WriteBuf = 0x00;  
		bcm2835_i2c_write_read_rs(&WriteBuf,2,&WriteBuf1,2);  
		bcm2835_i2c_read (&ReadBuf0,2);        
		printf("TTP229:%d\n",ReadBuf0);
		printf ("\r");
		fflush (stdout);
		bcm2835_delay(100);  
        }  
         
        bcm2835_i2c_end();  
        bcm2835_close();  
      
        return 0;  
} 
</pre>

<br>
==Program Writing==
===1.Installing bcm-2835 Library===
Here is the tutorial for installing bcm-2835 library in Raspberry Pi. To install bcm-2835, first we need to download bcm2835 library. So we will provide an installation package or click its official web http://www.airspayce.com/mikem/bcm2835/ to download it. <br>

'''Step1:''' Now after downloading library, copy it in any folder of your raspberry pi by winSCP(we provide its installation package, but please refer to usage by yourselves). <br>

'''Step2:''' Now it’s time to extract the library, so open terminal of raspberry pi and go to the folder where you have copied your library and type this command: '''tar zxvf bcm2835-1.26.tar.gz''' <br>

'''Step3:''' Now to into library folder, type this command: '''cd bcm2835-1.26''' <br>

'''Step4:''' Now, we are ready to install bcm2835 library, so to start installation type this command: '''./configure''' <br>

'''Step5:''' then type this command: '''make''' <br>

'''Step6:''' then this: '''sudo make check''' <br>

'''Step7:'''and finally this: '''sudo make install''' <br>

Congrats your library is installed. Now use “#include <bcm2835.h>” in your program to use bcm2835 library.<br>

<br>
===2.Programming===
Now it's time to write a program. If you need to create a new directory within raspberry pi, you can use the ‘mkdir’ command. So type at your terminal: '''mkdir rpi_shield'''   <br>
then copy the file '''rpi_TTP229L''' provided by us and put it into the directory rpi_shield through winSCP. Next, type this command: c'''d rpi_TTP229L''' to go inside the rpi_TTP229L folder. <br>
Then type this command: '''make'''  to make an executable file; This means this is the file we run to launch the program as shown in below figure.<br> 
To make a new directory, you just need to add the name of the directory after the command, such as 'mkdir new_directory'.<br>
Finally type this: '''sudo ./TTP229''' to launch the program. <br>
<br>[[File:ks0210-3.png|700px|frameless|thumb]]<br>
<br>


<br>

== Result ==
Touch the keys, and corresponding value is printed on the terminal as shown in below figure. <br>
Use '''Ctrl+C''' to exit the processing program.<br>
<br>[[File:ks0210-4.png|700px|frameless|thumb]]<br>

'''sudo ./TTP229''' to running program
<br>[[File:ks0210-5.png|700px|frameless|thumb]]<br>
<br>
Touching different keys to print various value


<br>

== Documents==

* '''Libraries and test code :''' <br>

https://fs.keyestudio.com/KS0210


<br>

== Get One Now ==
*[https://www.keyestudio.com/keyestudio-rpi-ttp229l-16-channel-touch-shield-for-raspberry-pi-ce-certification-p0473-p0473.html  '''Official website''' ]

*[https://www.aliexpress.com/store/product/Keyestudio-RPI-TTP229L-16-channel-Touch-shield-for-Raspberry-Pi/1452162_32779485623.html?spm=2114.12010612.8148356.21.4ae46485CwvPRi    '''Aliexpress store''' ]


[[Category:Raspberry Pi]]