いつもお世話になっております。

Capsense_Configration.hの下記変数の値の変化要因は何になるでしょうか？

・CapSense_CSD_GAIN

・Capsense_ADC_GAIN

・Capsense_ADC_IDAC_DEFAULT

なお、顧客プロジェクト(ICはCY8C4024LQI-S411)上では主だったところで

・Sense clock frequency

・Finger Threshold

・VDD(Design wide Resourceのsystem上)

を変えたところ、上記の3変数（およびCapSense_CSD_VREF_MV、Capsense_ADC_VREF_MV）が変わっているとの事です。

以上、ご教示いただきたく、よろしくお願いいたします。

お世話になっております。

Capsenseのdesign guideのManually tuning hardware parameters、Sense clock frequencyに下記記載がございます。

Equation 25 shows that it is best to use the maximum clock frequency to have a good gain; however, you
should ensure that the sensor capacitor fully charges and discharges as shown in Figure 39.

このthe sensor capacitor fully charges and dischargesはどのように確認を行えばよろしいでしょうか？

ご教示いただきたく、よろしくお願いいたします。

I want to tune the CapSense sensors, So for software parameters are there any prescribed values from where we need to start tuning or We have to select tuning parameters randomly(in a hit and trial manner) and then we have to further change those parameters to get the best result? Basically, How to start the tuning process of the sensor. Also please share some document to know the details about these paramters and what they signify?

Thanks

Hi,

I wanted to make a sample project of CapSense and I got to know that we have to take care of the parasitic Capacitance value. I wanted to calculate the parasitic capacitance value of the sensor and I am using GetSensorCapacitance() function to print the value but PSoC creator is throwing undefined reference to GetSensorCapacitance error in PSoC Creator. Can you tell why it is happening? How to solve the error? Also, Is there a range of Parasitic Capacitance upto which CapSense can support?

Regards D

Hello, 

I want to use a PSoC 4 device to continuously measure the raw capacitance of a two terminal capacitive sensor. The examples I found seem to detect changes in capacitance beyond a certain threshold, rather than measuring and outputting the raw capacitance value across two terminals. How would I do this? Are there any examples to follow?

Thanks!

Who can I contact to get Cypress CapSense support?
None of the original links in the datasheets seem work and I can't find the information to get started.

Also, where is the roadmap?

Eval boards?

Application notes?

We are Australia based.

Regards

B

CY8CKIT-046

Sample code: CapSense Buttons

→Launch Tuner

→Read operation failed! Check I2C bus connection

Please tell me the above correspondence

We are trying to use serial debug data from CY8CMBR2044. In the datasheet, a 41-byte packet is specified, however the chip is sending 71-byte data packets. Where can we find the specification for 71-byte packets? A 71-byte packet example:

0D 0A 00 03 0D EC 0D A9 0D A1 00 00 00 01 02 01 01 01 01 BB 36 34 34 11 08 08 0D EC 0D A9 0D A1
00 00 0B 00 0C 0C 0C 01 6C 68 68 00 20 00 00 08 B6 34 34 15 F4 01 00 00 27 29 29 80 01 01 01 89
1B 1A 9A 31 80 FF FF

In a design with PSOC4 chip with 4 different sensors that are routed in a similar way (trying to respect as much as possible the recommendation rules), we are experiencing differences between sensors sensitivity. Trying to solve this issue, we did not reach good enough results  using the tuning process that appears in the guidelines.

However, we have noticed that the default sensitivity value (normally too high by default in our case) can be reduced adding a pull up resistor closed to the sensor (between the sensor and the recommended serial resistor).

We are wondering if anybody in the community has experienced such sensititvity problems than cannot be adjusted by tuning process ? and if somebody has an electrical reason why this pull-up resistor is lowering the default sensitivity level of a sensor?

Any help on this will be appreciated.