Hello Mike Spenard,
I test the demo on my side, it can hits the case of "kI2C_SlaveCompletionEvent",
Try to set a breakpoint on line 67 g_SlaveCompletionFlag = true; just like my picture above, connect tow lpc54628 boards, flash mater project to Master board, download slave project to Slave board, click Run, then Reset Master board,
it should stop at the breakpoint.
BTW, please use the latest SDK v2.5.
Hope it helps,
BR
Alice
Hello Mike,
- "And the API needs to be written such that it hits a Completion State on a I2C stop rather than rxData counting down to 0." - Yes, this demo just shows raData down to 0. If you want to hit a completion state on Stop, just need to add the "case kI2C_SlaveDeselectedEvent " in i2c_slave_callback function, for example :
In i2c salve callback function:
static void i2c_slave_callback(I2C_Type *base, volatile i2c_slave_transfer_t *xfer, void *userData)
{
switch (xfer->event)
{...
case kI2C_SlaveDeselectedEvent:
g_SlaveCompletionFlag = true;
// Your own code
break;...
}
}
And in transfer function. we need add kI2C_SlaveDeselectedEvent:
/* Start accepting I2C transfers on the I2C slave peripheral */
reVal = I2C_SlaveTransferNonBlocking(EXAMPLE_I2C_SLAVE, &g_s_handle,
kI2C_SlaveAddressMatchEvent | kI2C_SlaveCompletionEvent|kI2C_SlaveDeselectedEvent);
- when Master send Stop, the Slave Deselected flag of STAT will set to 1 , then in the function of I2C_SlaveTransferHandleIRQ invoke kI2C_SlaveDeselectedEvent .
Please check the driver code :
void I2C_SlaveTransferHandleIRQ(I2C_Type *base, i2c_slave_handle_t *handle)
{
uint32_t i2cStatus = base->STAT;if (i2cStatus & I2C_STAT_SLVDESEL_MASK)
{
I2C_SlaveInvokeEvent(base, handle, kI2C_SlaveDeselectedEvent);
I2C_SlaveClearStatusFlags(base, I2C_STAT_SLVDESEL_MASK);
}...
}
Also have a look at the LPC546xx Reference Manual page 445.
Have a great day,
TIC
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