PSoC™ 4 Forum Discussions

Hi,

We are looking for capacitve touch slider with LED indication for one of our project

(Product is basically a LED lighting with touch interface for brightness control) we are in process of designing a capacitive touch slider with 7 levels (each and every slider having a LED indication, for ex:I have touch the first slider led should glow the first slider and vice versa)  

Can you have a such kind of capacitive touch slider interface reference design which related to our requirement it would be great
 

Hi:

  I use Cy8C4124 as an I2C slave device. if master don't read anything after 30 secounds. CY8C4124 will go to stop mode.most times are fine but some times, i find all of output pin of CY8C4124 is high level output. it is not 3.3V, but is 1.7V.

  I don't know why. please help me. thank you very much.

my code you can see below:

int main()
{
    
    CySysPmUnfreezeIo();
    CyGlobalIntEnable; /* Enable global interrupts. */

    I2CM_Start();
    EZI2C_EzI2CSetBuffer1(BUFFER_SIZE, READ_ONLY_OFFSET, ezI2cBuffer);
    EZI2C_Start();

    ReadfromBattary();
    
    Test_Write(1);
    CyDelay(10);
    Test_Write(0);
    CyDelay(1000);
    Test_Write(1);
    
    Timer_1_Start();
    TimerISR_StartEx(timer_isr); // Do use this one! 
    /* Place your initialization/startup code here (e.g. MyInst_Start()) */

    while(1)
    {}
}

void TimerISR( void )
{
    sleepcount++;
    if(timecount>=500000)
    {
    timecount=0;
    Test_Write(1);    
    ReadfromBattary();   
    }
    else
    {
    timecount++;
    read_flag=0;  
    Test1_Write(0);  
    Test_Write(0);
    }
    if(sleepcount>=5000000)
    {
    sleepcount=0;

    I2CM_Stop();    
    EZI2C_Stop();    
    Timer_1_Stop();
    
    CySysPmSetWakeupPolarity(CY_PM_STOP_WAKEUP_ACTIVE_HIGH); 
    
    CySysPmStop();

    }
    
}

Well, I installed all the tools for my CY8CKIT-049-42xx and built the project Breathing LED.  All going well until the program step.  Here I get a blank pop-up when trying to select debug target.  The board is plugged into the USB socket and I check in Device Manager on my Windows 10 PC and it looks like the driver is installed.  How to acquire the port?

Hi, I have two questions on my project.

1. how to calculate the absolute value of capacitance according to the raw data? Is there a equation to do this?
Since the resolution is 0.1pF, i assume the detection range is 0 to 25.5pF? Is that correct?

2. For the sensor we are going to use, 100kHz will be a proper frequency for the stimulation signal. So, how to set the stimulation signal frequency or can we use external signal source to drive the sensor? What is the  frequency range it support?

Thanks for any answers!

Song