PSoC™ 4 Forum Discussions

I am doing a project that uses 5 capsense buttons to operate a locking mechanism in my project. I m having issues that when i power up the unit by placing batteries into the unit it some times does not operate properly.  There are times I only get 4 buttons to work or I get only one button to work.  Most the time is does work properly were all 5 buttons work great. In the design i am using the shield option and activated sense my project will be around water a significant amount of time.

CapSense Setup:

I have a 2.2nF cap on the Cmos pin and a 10nF cap on the Csh pin.

Board:

The board is a four layer board in which i followed the guidelines suggested in getting started with capsense. i followed the guidelines in AN85951 page 110.

Top layer: Hatch fill 7-mill and 45-mil grid ... connected to shield.

Layer-2: Hatch fill 7-mill and 70-mill grid ... connected to shield.

Layer 3: Solid Plane ... connected to Gnd

Bottom Layer: Hatch fill 7-mill and 70-mill grid ... connected to Gnd

I have attached my project for review.

I was hoping i could get some help as to why my capsense is not working constantly all the time at power.  I my board is need for review let me know and i will post it if necessary.

Thanks

Scott

Hi

There is a problem if CAN host sends large amount of data, CY8C4147 cannot receive data.

Does cypress have CAN software filter ? Thanks.

BR

Grace

As described in Em_EEPROM 2.0 datasheet, I have an Em_EEPROM whose storage is at a fixed address,

and it is working very well.

When i add a bootloadable component in the project, all is working if Em_EEPROM storage

address is not fixed, but I can not define a fixed address as specified in the datasheet ?

Hi

May I know how to define a const in the fixed flash address ?

Thanks.

BR

Grace

Hello,

There is a ILO accuracy in the Automotive PSoC® 4: PSoC 4000S datasheet like below.

                                                                   min  typ max

SID237 FILOTRIM1 ILO frequency range    20  40    80 kHz

Q1:Is this "Guaranteed by characterization" or "designed value"?

And there is a "Trimmed ILO frequency (+/ 60%) " in PSoC 4 Low-Frequency Clock (cy_lfclk) datasheet.

Similarly, there is a "40-kHz internal low-speed oscillator (ILO) with ±60 percent accuracy

with trim (can be calibrated using the IMO)" in PSoC 4000S Family PSoC 4 Architecture TRM.

Q2:What is "Trimmed ILO frequency (+/ 60%) "? and please tell me the relation between SID237 min/typ/max value and "Trimmed ILO frequency (+/ 60%) ".

Best regards,

Yocchi

Hello,

I am using CYBLE-212020-01 modules which sends and receives some values over BLE from App.

So while testing with some devices , on some devices it gets disconnected abruptly.

And the disconnection error is : CYBLE_HCI_INSTANT_PASSED_ERROR (0x28)

Some iphone/android devices are able to maintain the connection without fault, some get disconnected almost immediately on every connection.  This happens using our custom app.

What is this error? What is the reason? How to fix this?

Thanks in advance for any replies.

Lucia

Hi,

We use CapSense component of PSoC4S.

Software : PSoC Creator 4.2

Kit : CY8CKIT-041-40XX (Device is CY8C4045AZI-S413)

Project : CE211584 Trackpad With Color Gamut