PSoC 4 MCU

Hi All,

I  tried to implement I2C communication between Cy8C4025AZI-S412( Slave ) and Pic Microcontroller(Master). The speed is 100kbps and used polling method. When button not pressed then it will sent 0xFF. The polling time is 100msec by PIC controller.

The issue is, 

1) Sometimes acknowledge not given by Slave.(need to sent data 3 to 4 times  or delay of 30ms  then it gives ack ).

I used one example code to develop I2C.

My code is below,

#include <project.h>

/* Macro Declaration */
#define BUFFER_SIZE (1u)
#define PACKET_SIZE (BUFFER_SIZE)

/* The I2C Slave read and write buffers */
uint8 i2cReadBuffer [BUFFER_SIZE] = {0};
uint8 i2cWriteBuffer[BUFFER_SIZE]= {0};

uint8_t flag1=0;

uint8_t flag3=0;

void Received_Data_From_Master1();

int main()
{

     /* Eneble Global Interrupt */

      CyGlobalIntEnable;

      CapSense_Start();
      CapSense_ScanAllWidgets();

     /* Start the I2C Slave And I2C Address Setting*/
     I2CS_I2CSlaveInitReadBuf(i2cReadBuffer, BUFFER_SIZE);
     I2CS_I2CSlaveInitWriteBuf(i2cWriteBuffer, BUFFER_SIZE);

       I2CS_I2CSlaveSetAddress(0x08);
       I2CS_Start();

for (;;)
{
    CyDelay(2);
   /* With Respect to Master i.e Checked Whether the Master Write Complted Or Not */
    if (0u != (I2CS_I2CSlaveStatus() & I2CS_I2C_SSTAT_WR_CMPLT))
{
          /* Calling Function to Collect The Data From Master */
          Received_Data_From_Master1();
          /* Enable this above function when we used the data On Switch Function */

            /* Clear the slave write buffer and status */
            I2CS_I2CSlaveClearWriteBuf();
            (void) I2CS_I2CSlaveClearWriteStatus();
}

if(CapSense_NOT_BUSY == CapSense_IsBusy())
{
      /* API For Capsense Update Scanning And Process */
      CapSense_ProcessAllWidgets();           /* Process all widgets */
      CapSense_RunTuner();                            /* To sync with Tuner application */
      /* Checked whether Left Button Active or Not*/
if((flag3==0)&&(CapSense_IsWidgetActive(CapSense_BUTTON2_WDGT_ID)) )
{
      flag3=1;              /* Reseting Left Button Flag */
      i2cReadBuffer[0] = 0x01;
      while (I2CS_I2C_SSTAT_RD_CMPLT!=(I2CS_I2CSlaveStatus()));
      /* Clear the slave read buffer and status */
       I2CS_I2CSlaveClearReadBuf();
      (void) I2CS_I2CSlaveClearReadStatus();
      i2cReadBuffer[0] = 0xFF;
}
else if((flag3==1) && (!(CapSense_IsWidgetActive(CapSense_BUTTON2_WDGT_ID))))
{
       flag3=0; /* Setting Left Button Flag */
       i2cReadBuffer[0] = 0xFF;
}


/* Checking Right Button active or not */
if((flag1==0)&&(CapSense_IsWidgetActive(CapSense_BUTTON0_WDGT_ID)))
{
        flag1=1; /* Reseting the flag*/
         i2cReadBuffer[0] = 0x06;
         while (I2CS_I2C_SSTAT_RD_CMPLT!=(I2CS_I2CSlaveStatus()));
        /* Clear the slave read buffer and status */
        I2CS_I2CSlaveClearReadBuf();
        ( void) I2CS_I2CSlaveClearReadStatus();
         i2cReadBuffer[0] = 0xFF;
}
else if((flag1==1)&& (!(CapSense_IsWidgetActive(CapSense_BUTTON0_WDGT_ID))))
{

          flag1=0; 

}
}

}

}

void Received_Data_From_Master1()
{
switch(i2cWriteBuffer[0])
{
  /* After Receiving 00 touch will be Ready to Work */
  case 0x00:
         i2cReadBuffer[0] = 0x19; /*According to New Document Wants to transmit new data acknowledgement */
         POWER_LED_Write(0);
          break;

}

}

Any Help will be highly appreciated .

Thanks & Regards,

AsDh

Dear all,

I'm working on CY8C4245AXI-483 MCU. I want to write a code to toggle LED through capsense touch button.  it means, initially LED is OFF. now when i touch button it should be ON. and remains ON untill i touched it 2nd time. after touching 2nd time it should be in OFF condition and remains in OFF untill i touched it 3rd time and so on.

i found code for same, somewhere on internet. is this correct or i need to change something? Please give me your valuable suggestions.

Thanks & Regards,

Prem KB

/*code starts from here*/

uint fingerpresent_0 = 0;

uint8 wdgt_active = 0;

In my application Psoc4 has to serve a device that could be configured  in SPI or parallel mode during runtime. In SPI mode pin named D0 has to be configured as MTSR, D1 has to be configured as SS,  D2 has to be configured as SCLK and  D3 has to be configured as MRST. In parallel mode  D0...D3 are part of the parallel IO (D0...D7) offering bidirectional IO. How to implement this switch on the fly?

Hi All

 I found the NAK Signal During the write frame.

I have attached the logic analyzer observation result for the same.

Master Device:- PIC Controller 

Slave Device :- Cy8C4025AZI-S413 

My Slave Address is 0x08 

Ideally After Address byte their should be ACK From Slave but  I observed NAK Signal.

I am not getting where is the exact mistake?

Any help will be highly appreciated.

Regards,

AsDh

Please Find the below Code for reference..

#include <project.h>

/* Macro Declaration */
#define BUFFER_SIZE (1u)
#define PACKET_SIZE (BUFFER_SIZE)

/* The I2C Slave read and write buffers */
uint8 i2cReadBuffer [BUFFER_SIZE] = {0};
uint8 i2cWriteBuffer[BUFFER_SIZE]= {0};

uint8_t flag1=0;

uint8_t flag3=0;

void Received_Data_From_Master1();

int main()
{

	/* Eneble Global Interrupt */

	CyGlobalIntEnable;

	CapSense_Start();
	CapSense_ScanAllWidgets();

	/* Start the I2C Slave And I2C Address Setting*/
	I2CS_I2CSlaveInitReadBuf(i2cReadBuffer, BUFFER_SIZE);
	I2CS_I2CSlaveInitWriteBuf(i2cWriteBuffer, BUFFER_SIZE);

	I2CS_I2CSlaveSetAddress(0x08);
	I2CS_Start();

	for (;;)
	{
        
		//CyDelay(2);
		/* With Respect to Master i.e Checked Whether the Master Write Complted Or Not */
		if (0u != (I2CS_I2CSlaveStatus() & I2CS_I2C_SSTAT_WR_CMPLT))
		{
			/* Calling Function to Collect The Data From Master */
			Received_Data_From_Master1();
			/* Enable this above function when we used the data On Switch Function */

			/* Clear the slave write buffer and status */
			I2CS_I2CSlaveClearWriteBuf();
			(void) I2CS_I2CSlaveClearWriteStatus();
		}
        if (0u != (I2CS_I2CSlaveStatus() & I2CS_I2C_SSTAT_RD_CMPLT))
        {
            /* Clear the slave read buffer and status */
            I2CS_I2CSlaveClearReadBuf();
            (void) I2CS_I2CSlaveClearReadStatus();
        }
		if(CapSense_NOT_BUSY == CapSense_IsBusy())
		{
			/* API For Capsense Update Scanning And Process */
			CapSense_ProcessAllWidgets();           /* Process all widgets */
			CapSense_RunTuner();                            /* To sync with Tuner application */
			/* Checked whether Left Button Active or Not*/
			if((flag3==0)&&(CapSense_IsWidgetActive(CapSense_BUTTON2_WDGT_ID)) )
			{
                POWER_LED_Write(0);
				flag3=1;              /* Reseting Left Button Flag */
				i2cReadBuffer[0] = 0x01;
//				while (I2CS_I2C_SSTAT_RD_CMPLT!=(I2CS_I2CSlaveStatus()));
//				/* Clear the slave read buffer and status */
//				I2CS_I2CSlaveClearReadBuf();
//				(void) I2CS_I2CSlaveClearReadStatus();
				//i2cReadBuffer[0] = 0xFF;
			}
			else if((flag3==1) && (!(CapSense_IsWidgetActive(CapSense_BUTTON2_WDGT_ID))))
			{
				flag3=0; /* Setting Left Button Flag */
				i2cReadBuffer[0] = 0xFF;
			}


			/* Checking Right Button active or not */
			if((flag1==0)&&(CapSense_IsWidgetActive(CapSense_BUTTON0_WDGT_ID)))
			{
				flag1=1; /* Reseting the flag*/
				i2cReadBuffer[0] = 0x06;
//				while (I2CS_I2C_SSTAT_RD_CMPLT!=(I2CS_I2CSlaveStatus()));
//				/* Clear the slave read buffer and status */
//				I2CS_I2CSlaveClearReadBuf();
//				( void) I2CS_I2CSlaveClearReadStatus();
				i2cReadBuffer[0] = 0xFF;
			}
			else if((flag1==1)&& (!(CapSense_IsWidgetActive(CapSense_BUTTON0_WDGT_ID))))
			{

				flag1=0; 

			}
            CapSense_ScanAllWidgets();
		}

	}

}

void Received_Data_From_Master1()
{
	switch(i2cWriteBuffer[0])
	{
	/* After Receiving 00 touch will be Ready to Work */
	case 0x00:
		i2cReadBuffer[0] = 0x19; /*According to New Document Wants to transmit new data acknowledgement */
		POWER_LED_Write(0);
		break;

	}

}

/* [] END OF FILE */

I have a CYBT-213043-EVAL board and the  CYBT-213043-Mesh board. I downloaded the Eclipse  IDE for modus toolbox 2.2 and opened the Mesh application and the RFComm application.  I was successful building, programming and running both applications using the USB connection for each board.  I now want to modify and debug each application. I purchased and received the CY8CKIT-005 miniprog4  kit to accomplish the debug.   I downloaded the software for the  CY8CKIT-005 miniprog4 kit and I believe I was successful.  1st question, is this the correct kit to perform debug?  2nd question, is there documentation to show how to physically connect the 5 pin or 10 pin connector of the CY8CKIT-005 miniprog4  kit to the eval boards?  3rd question, is there specific manual for debugging? 

Hi All

 I found the NAK Signal During the write frame.

I have attached the logic analyzer observation result for the same.

Master Device:- PIC Controller 

Slave Device :- Cy8C4025AZI-S413 

My Slave Address is 0x08 

Ideally After Address byte their should be ACK From Slave but  I observed NAK Signal.

I am not getting where is the exact mistake?

Any help will be highly appreciated.

Regards,

AsDh