PSoC™ 4 Forum Discussions

I have a SPI slave mode problem with interrupt mode.

When I use polling communication is normal. I can receive SPI Master  frame and response slave frame data.

But, I try interrupt mode. it Will be stuck in the interrupt sub function.

The program strucks on this line in debug mode. -->  while (PACKET_SIZE != SPI_SpiUartGetRxBufferSize()) 

The blow is my PSoc creator setting and program screenshot.

my program screenshot

1. ISR function

2. Enable interrupt

3. ISR function

I’ve found:

- I2C FM+ mode is NOT supported in PSoC 4100S due to lack of OVT-GPIO pins.

- I2C speed appears to be limited to 50KHz due to lack of PLLs

- Using ISRs appears to have an affect on the maximum I2C speed.

Are there other features within PSoC components that either enable or limit the maximum speed for I2C communication?

I’m specifically having issues attempting to implement an I2C slave in a CY8C4125AZI-S433 at any speed over 50kHZ.

The design worked without issue in a PSoC 4200M (using CY8CKIT-044).

The PSoC 4S parts do NOT contain PLLs, which appears to limit the accuracy of internal clocks, thus limiting higher I2C speeds. Reference: Knowledge Based Article clarifying the difference between PSoC 4S and 4S Plus @ https://community.cypress.com/docs/DOC-14404

All comments appreciated.

Greg

Hi All

I am new to PSoC , why do I see this red mask on the component in my schematic ?

I updated the component library version

Thanks in advance

Hi

     We used PSOC 4 CY8C4246AZI-L445 USB controller. We use this controller for single USB output for keyboard and mouse data.

But our customer windows 7 PC not connected to internet the keyboard can not find driver.

Please suggest how to download USB HID driver or send any cypress USB HID driver file.

is there a reference for changing the Capsense Gesture component in the code example 'CapSense_Csd_P4_Trackpad_Gestures' to the component CapSense v7.0?

Code changes?

thank you

[Products]

- CY8C4147AZI-S445

- CY8C4147AZI-S475

PSoC Creater's Bootloader for PSoC4 As far as I read the specification, it seems that the version upgrade of Main via Booter only supports UART, SPI and I2C.

Q.

Is there a way to use Bootloader with CAN?

Best Regards,

Harukawa

-------------------------------------------------

CypressPSoC CY8C4147 について

CY8C4147AZI-S445

CY8C4147AZI-S475

PSoC Createrの PSoC4用 Bootloaderですが 仕様を読む限り

Booter経由のMainのバージョンアップを UART,SPI,I2Cにしか対応していないようですが

BootloaderをCAN対応にさせられる方法なり 事例なり ありませんでしょうか

以上、よろしくお願い致します。

Hi,

My micro-controller type is cy8c4014lqs-422. I would like to ask, what is recommended scan rate by I2C Master from buffer I2C Slave. I want read continuously only 4 bytes. How frequently CapSense buttons should be pulled? There is some technical recommendation from Cypress?

According to Jacob Nielsen in his book Usability Engineering, from 1993, which is considered an important reference in Systems Usability and User Experience:

• 0.1 second is about the limit for having the user feel that the system is reacting instantaneously, meaning that no special feedback is necessary except to display the result.

But this is too much general. I'm assuming scan rate shall be much less.