PSoC™ 4 Forum Discussions

Hello everyone,

I wonder if anyone could have a quick look at my project to suggest what I am doing wrong. This is a project that I had downloaded from Sam's blog, and I am following pretty much what he recommends. The code runs but throws an error that " MPU6050 connection failed" followed by printing 0 all over.

I would like to mention that: 1. I have used this code previously, and it had worked. 2. I testecMPU6050 unit Arduino and it worked fine, which means sensor board is OK.

Some of the community members had previously helped me getting started with this project. I am hoping they would me understand the issue. I am attaching the project below. I would appreciate if someone could run on her computer.

Hello
I have been doing electronics since 1968 but BLE only for 1 month.
I have a very simple project with two modules (each equipped with a CYBL10162-56LQXI) that I have to make in 15 days!
A push button on one module, a relays on the other module.
If the button is ON the relay must be ON
If the button is OFF the relay must be OFF
I use PSOC4 V4.2
Thank you
Yves

Hi,

I'm researching what is the maximun throughput via notification that can be achieved. Is there any limitation regarding the number of packtes in one connection interval? 

I want to send a max of 32 bytes a packet, how do i know how many packets it will send?

Thank you

Hi,

I am trying to build a simple SPI slave communication protocol for an existing master. The master device is an Atmega microcontroller, with an SPI clock approximately 40Kbps.

There are two types of messages: first one is master write messages, and second one is master read messages. And I want to implement all protocol logic in interrupt handler...

The problem is; I cant simply use buffered mode, since master write packets should echo the incoming packet (with one or two bytes exception) immediately.

SCB is configured in SPI slave mode, with 0 software buffer size (RX and TX buffer sizes are 8). Interrupt is configured as Internal, and the only interrupt source selected is "RX FIFO Not Empty".

Code is written with following naming notations...

Every thing starting with cy are cypress conponents, and everything starting with comm are related with my communication routines.

the following code is my custom SPI ISR function.

//WRITE MESSAGE FORMAT:

// <WriteSlaveCommand><TotalSize><PayloadSize><...PAYLOAD...><MasterMagic><CRC>

// Response should be an echo (only change MasterMagic with SlaveMagic, and update CRC accordingly)

//READ MESSAGE FORMAT:

// <WriteSlaveCommand><TotalSize><PayloadSize><...0xFF's...><MasterMagic><CRC>

//Response should be populated accordingly

void _commParsePacket(void)

{

    //store received byte

    _commRxByte = cySPI_RX_FIFO_RD_REG;

    while(0u != cySPI_GET_RX_FIFO_ENTRIES);

    cySPI_ClearRxInterruptSource(cySPI_INTR_RX_NOT_EMPTY);

    //if software buffer enabled

    //cySPI_rxBufferHead = 0;

    //cySPI_rxBufferTail = 0;   

    switch(_parseIndex)

    {

        //wait for Write or Read command

        case 0:

            commRxCrcReset();

            commPacket.command = _commRxByte;

           //Clear/Invalidate TX buffer

            cySPI_TX_FIFO_CTRL_REG |= 0x00010000;

            cySPI_TX_FIFO_CTRL_REG &= 0xFFFEFFFF;

            if ((commPacket.command == WriteSlaveCommand) || (commPacket.command == ReadSlaveCommand))

            {

                commStartedCount++;

                commTxCrcReset();

                _commTxByte = commPacket.command;

                if (commPacket.command == WriteSlaveCommand)

                {

                    commPacket.payload = (unsigned char*)&commMosiPacket; //if command is a write command, fill this structure

                }

                else

                {

                    commPacket.payload = (unsigned char*)&commDummyPacket; //if command is a read command, fill a dummy/temporary structure

                                                                                                                           //note: already populates MisoPacket is going to be transferred

                }

                _parseIndex++;

            }

            commRxCrcUpdate(_commRxByte);

            break;

        // wait for total size

        case 1:

            commPacket.totalSize = _commRxByte;

            _commTxByte = commPacket.totalSize;

            commRxCrcUpdate(commPacket.totalSize);

            _parseIndex++;

            break;

        //wait for payload size           

        case 2:

            commPacket.payloadSize = _commRxByte;

            commRxCrcUpdate(commPacket.payloadSize);

            //check for payload sizes... return to parseIndex=0 to avoid a possible data overflow

            if( ((commPacket.command == ReadSlaveCommand) && (commPacket.payloadSize ==  5)) ||

                ((commPacket.command == WriteSlaveCommand) && (commPacket.payloadSize == 17)) )

            {

                _commTxByte = commPacket.payloadSize;

                _parsePacketIndex = 0;

                _parseIndex++;

            }

            else

            {

                _parseIndex = 0;

            }

            break;

        //fill payloads

        case 3:

            if (_parsePacketIndex < commPacket.payloadSize)

            {

                commPacket.payload[_parsePacketIndex] = _commRxByte;

                if (commPacket.command == ReadSlaveCommand)

                {

                    _commTxByte = ((unsigned char*)(&commMisoPacket))[_parsePacketIndex];

                }

                else

                {

                    _commTxByte = ((unsigned char*)(&commMosiPacket))[_parsePacketIndex];

                }

                commRxCrcUpdate(_commRxByte);           

                _parsePacketIndex++;

            }

            if (_parsePacketIndex == commPacket.payloadSize)

            {

                _parseIndex++;

            }

            break;

        //replace magic numbers

        case 4:

            commPacket.magicNumber = _commRxByte;

            _commTxByte = SlaveMagic;

            commRxCrcUpdate(commPacket.magicNumber);

            _parseIndex++;

            break;

        //wait and check for CRC's

        case 5:

            commPacket.crc = _commRxByte;

            _commTxByte = commTxCrcGet();

            _parseIndex++;

            if (commPacket.crc == commRxCrcGet())

            {

                if (commPacket.command == WriteSlaveCommand)

                    _commSuccess = 0x00;

            }

            break;

        //wait for my CRC to be send...

        default:

            _parseIndex = 0;

            //_commResetTXBuff();

            //return;

            break;

    }  

    //transmit

    cySPI_TX_FIFO_WR_REG = _commTxByte;

    commTxCrcUpdate(_commTxByte);

    //if software buffer enabled

    //cySPI_txBufferHead = 1;

    //cySPI_txBufferTail = 0;

    return;

}

I am using Psoc Creator 4.1, and my device is CY8C4124...

Also note that "Slave Select" is always selected.

Problem is;

1 - It seems nearly 1/2 of the time, they just communicate ok.

2 - If I read failed packets, I see data is late 1 or 2 bytes...

Thanks...

Hi,

Is there any max number of packets that we can send in one connection interval?

Thank You

I'm using an EZ BLE module CYBLE-214009-EVAL with a Pioneer board and trying to use the example program BLE_4.2_DataLength_Security_Privacy.  It complains that I'm trying to use a data length greater than 27 bytes which my device can't handle. I take this to mean that the EZ-BLE module has BLE 4.1 or earlier and so can't deal with BLE 4.2 settings.

Can this device be upgraded to BLE 4.2? 

Would you be kind enough to tell me how to do it?

Thanks,

Dennis