PSoC™ 4 Forum Discussions

Hello all,

I am hoping to get create a custom client that will be able to handle data that it receives from a server/peripheral device. The server is sending data via notifications. I have already written the server side and was really pleased with all the good example projects that were helpful in development. Now that I am writing the client code, I am finding it slightly more difficult.

At this point, I have opened up the PSoC_4_Central_IAS example project in order to get a starting point for develping the client program that I need. The first thing that I did was call a few API's that I added to bleApplications.c in order to discover attribute. I called CyBle_GattcDiscoverAllPrimaryServices(), CyBle_GattcDiscoverAllCharacteristics(),  and CyBle_GattcDiscoverAllCharacteristicDescriptors(). These all have returned with no error. Now that I have done that, I assume that my next step is to enable notifications to come from the server, and then log the data that the server gives me. 
The main questions I have here are, what API do I call to do this? I was thinking about using GattcWriteCharacteristicDescriptors() and writing a 0x01 to UUUID 2902 which is the CCCD handle. Does this seem to make sense?

Then I am wondering what else I need to do on the client side to start getting the data that the server sends assuming I have successfully enabled notifications. Do I need to add all the services, characteristics, and descriptors that the server has to be identicle in the client Macro BLE block? At this point, I just mirrored the attributes of the server including all the same UUUID's. Is this necessary?

The final thing I am wondering, which sort of relates to the other questions I have asked, is where all the data that the server sends can be found. Is there a function that I should call that returns the value of the data being sent? Or is there some variable or struct that exists which holds the notification data?  

I realize there are a lot of questions posed above and I am hoping that someone may have some insight or recommendations of places to go to get some more information, or perhaps an example project that would have some helpful examples. 

Thanks for the input, I can clarify any questions you have in response to the above. 

Dear all,

I hope you guys can help me with this. I am having a problem with the PSoC 4 (CY84245AXI-483) code that it keeps entering in a infinite loop inside a interruption handler (CY_ISR(IntDefaultHandler)).

The project consists in an End Point XBEE node that has a user Button (BTN) connected to it. In the StartUp of the device, if the button is pressed, it executes the XBEE configuration (network, IOs,etc.). Later this button can only be used to send a dummy data to the Network coordinator to allow proper addressing of all nodes. This action is handled by an rising edge interrupt routine that enters in critical region (disabling all interrupts) while the user is pressing the button to send the dummy data.

The first time that the system runs (button pressed) all the configuration works perfectly and the dummy data runs once. Then the PSoC enters in the nonsense infinite loop.

I read here in the forum and also in the PSoC Developer forum that it is something related to interruption handlers declaration. But I could not find any issue related to that in my current code.

Any Help will be greatly appreciated.

ps.: The XBEE communication is all handled in API mode.

Find the project bundle attached.

Hi, 

Please help to review the attached schematic

The interfacing between keypad and microcontroller (LPC1788 from NXP) is  provided through I2C communication.

Please advise if any changes to be made. Thank you

Regards

Maruthi

So, where is the errata sheet for PSoC4000? I've searched the site high and low, and found nothing. Despite that, I already found some actual bugs:

    
1. Documentation for the SROM syscall to setup clocks is wrong (TRM "Document No. 001-89309 Rev. *C" page 144). Docs say that this syscall takes a pointer to memory, and there I write param. This never works. Passing the actual param directly (like for "checksum" system call) in SYSARG register does work.
    
2. Either documentation for SPCIF_GEOMETRY is wrong, or the chip has a bug where it reports the wrong value. My CY8C4013SXI-400 (which has 8K of flash) reports this register's value as 0x0001003f. As per register doc sheet (Document No. 001-90002 Rev. *C) that means it has (0x3f + 1) * 256 = 16384 bytes of flash. Of course in reality the chip has 8 (and as a test, I do indeed get a fault if I read past 8K)
    
3. If I use the "Load Flash Bytes" SROM syscall shortly after boot, and point it to an area of flash where i put in the proper params to load 64 bytes of data into the write latches (0x0000d7b6, 0x0000003f) but I DO NOT WRITE THE NEXT 16 WORDS (let's assume i am ok writing whatever garbage was there into flash) , SROM locks up (actual cortex-m0 core lockup bit set and all). However, if those same words of RAM have ever been written before since boot (by core or by the MEMAP) no lockup occurs. (Yes, flash clock is properly set up. Yes, literally writing zeroes or any other values to these bytes immediately before or long before the syscall makes it work properly/)
   

Given all this, I am guessing at least a few more issues exist. is there a list?