Level 1
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 */
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