I am working with CY8CKIT-059 and need help discerning the differences between my custom project and one of the projects provided under "Find code example..." dialogue.
I have a device that is acting as an I2C Master and is connected to the CY8CKIT-059 acting as an I2C slave.
If I use the sample project: "DelSig_I2CS" I can successfully perform a Write operation from the external device and the CY8CKIT-059 running the sample project can successfully ACK the address and receive the 2 bytes being written to it. No issues here, I2C slave is working as expected.
However when I generate a new project, and reuse the code from the sample I2C project and set up the I2C peripheral in the same way the sample project has it configured, the CY8CKIT-059 NACKs the address and no data is received.
Perhaps I am not setting up the custom project in the same way, but I think I have checked everything.
What are some probable causes as to why the CY8CKIT-059 would NACK when being addressed?
I will attach both projects: DelSig_I2CS is working just fine with no issues and "Roadrunner2_Eval which I believe is setup in the same way.
In general, both projects have the same code:
At this point Delays are being used to have a line of code to attach breakpoints to.
I2CS_Start();
/* Set up slave read data buffer */
I2CS_SlaveInitReadBuf((uint8 *) sample_segment, RD_BUFFER_SIZE);
I2CS_SlaveInitWriteBuf((uint8 *) sample_segment, RD_BUFFER_SIZE);
/* Enable global interrupts - needed for I2C operation */
CyGlobalIntEnable;
Enter Main Loop:
/* Check if the slave buffer has been Written */
if(I2CM_SlaveStatus() & I2CM_SSTAT_WR_CMPLT)
{
byteCount = I2CM_SlaveGetWriteBufSize();
I2CM_SlaveClearWriteStatus();
I2CM_SlaveClearWriteBuf();
/* If both bytes of the read buffer have been read */
if(byteCount == I2C_BUFFER_SIZE)
{
CyDelay(1);
return 1;
}
else /* Wrong number of bytes read - place error handling code here */
{
CyDelay(1);
}
/* Check if the slave buffer has been read */
if(I2CM_SlaveStatus() & I2CM_SSTAT_RD_CMPLT)
{
byteCount = I2CM_SlaveGetReadBufSize();
I2CM_SlaveClearReadStatus();
I2CM_SlaveClearReadBuf();
/* If both bytes of the read buffer have been read */
if(byteCount == I2C_BUFFER_SIZE)
{
CyDelay(1);
return 1;
}
else /* Wrong number of bytes read - place error handling code here */
{
CyDelay(1);
}
