PSoC 4 MCU

Hello everybody,

I encountered some strange behaviour using UART.

I'm developing on a CY8C4126AXI-S445. I needed some debug outputs, so I decided to use a UART bridge project, which has already worked before.

As a bridge I use a CY8CKIT-059. It has a UART_in and a UART_out.
this is the entire user code in main.c:

int main(void)
{
  CyGlobalIntEnable; /* Enable global interrupts. */
  UART_in_Start();
  UART_out_Start();

  uint8_t uartChar;

  for(;;)
  {
    /* Place your application code here. */
    uartChar = UART_in_GetChar();
    if(uartChar)
    {
      UART_out_PutChar(uartChar);
    }
  }
}

However the problem seems to be in the CY8C4126AXi-S445.
I wanted to put out "Initialisation\r\n" during initialisation.
Put what I saw on my terminal was something like this: Initia[][][]\r\n

I tried different Texts and depending on the length the rectangles appeared at different spots. I tried changing several UART parameters like baud rate, oversampling etc. All with pretty much the same result.

I added texts and noticed that this error only occurs on the first output command.

I also noticed, when I put the command into the main loop, there is no error. So it only happens during initialisation. Has anyone else observed this behaviour before? Has anyone a solution to this problem?

Thanks for your help.
Please let me know if you need any project files.

Hello, further to a question I asked (https://community.cypress.com/t5/PSoC-4-MCU/Reversing-proxmity-sensing/m-p/270896#M39101).  After weeks of testing, I found that the CapSense values are very sensitive to the voltage of the power supply.  At 3.8v the raw value could be 8000, while 3.7v could be 1000 and even lower when approaching 3.6v. 

Since my system runs off a 3.8v battery as the power supply (connected to VDD of CY8C4245 directly). Is there any way to get a stable value from CapSense even the supply voltage drop a little? Like an internal regulator or something?  

Thank you!

Hello, I am testing a new design based on MagSense using a CY8CKIT-148 evaluation board. At the beginning everything was working but to use the tuner sw I had to update the firmware of the debug interface MCU on board. I updated it following the kit instructions apparently with success. After that I was not able anymore to program and debug the on board PSoC 4 MCU.

And I am not also able to update/program the on board firmware (I mean that of the hw debug interface MCU).

How can I re-flash that MCU?

Thanks,
Massimo

Hello,

Looking at J9 at SCHEM1 seems to represent J9 on SCHEM2 which seems to suggest that depending on the jumper of J9, the PSoC 4 and PSoC 5LP chips will be powered by either the USB's 5VDC or the 3.3VDC via the LDO power supply system. The jumper chosen on J9 will represent the VDD volatge throughout the parts connections. (Please confirm if I am assuming this correctly!)

In SCHEM3, we have VCCD??? Where does this come from???

Thank you 

All help appreciated

r

Hi all,

We are facing one issue of hanging touch panel.

When capsense is not working, other ISR is working.

How can I detect a fault in cap sense ?

How to get an error code in this situation?

How to solve this issue ?

Hi,

Regarding the GND electrode and the shield electrode, the mesh width and the distance between the meshes are described in the reference manual in a fixed manner.
What is the rationale for this value?

Also, what are the negative effects of using a solid pattern instead of a mesh for the shield electrode?

Regards,

Naoaki Morimoto

Should I use the api "CapSense_Stop()"  before  "CySysPmDeepSleep();" and after WDT wakeup use  "CapSense_Start()"?

If I don't use these two api ,    CapSense_NOT_BUSY == CapSense_IsBusy()  can't  pass. When I use the api  "CapSense_Start()"  ,the current increase 200 ua.

Hello, 
I want to use the AN89056 Ram test in my project. I have copied all the required files from the AN89056_Ram test in my custom project. I have also compared the build settings of Project AN89056 Ram-test and make them equal but it is giving an error. 

--undefined reference to MArch_Test_init

--undefined reference to MArch_Test_SRAM

this function is in "CyLib.h" and in assembly but the project does not find a reference. Could you please help me regarding????

Hi,

I have one use case in which I need to Sense only one key (i.e key 5) in every 1 second..need to check that whether this key is pressed or not..so how can I achieve this. I configure capsense as a buttons