/*FUNCTION**********************************************************************
*
* Function Name : I2C_DRV_SlaveInit
* Description : initializes the I2C module.
* This function will save the application callback info, turn on the clock of
* I2C instance, setup according to user configuration.
*
*END**************************************************************************/
void I2C_DRV_SlaveInit(uint32_t instance,
const i2c_slave_user_config_t * userConfigPtr,
i2c_slave_state_t * slave)
{
assert(slave);
assert(instance < HW_I2C_INSTANCE_COUNT);
uint32_t baseAddr = g_i2cBaseAddr[instance];
/* Exit if current instance is already initialized. */
if (g_i2cStatePtr[instance])
{
return;
}
/* Init driver instance structure */
memset(slave, 0, sizeof(i2c_slave_state_t));
slave->slaveListening = userConfigPtr->slaveListening;
slave->slaveCallback = userConfigPtr->slaveCallback;
slave->callbackParam = userConfigPtr->callbackParam;
/* Enable clock for I2C.*/
CLOCK_SYS_EnableI2cClock(instance);
/* Init instance to known state. */
I2C_HAL_Init(baseAddr);
/* Set slave address.*/
I2C_HAL_SetAddress7bit(baseAddr, userConfigPtr->address);
/* Save runtime structure pointer.*/
g_i2cStatePtr[instance] = slave;
/* Create Event for irqSync */
OSA_EventCreate(&slave->irqEvent, kEventAutoClear);
#if FSL_FEATURE_I2C_HAS_START_STOP_DETECT
/* Enable I2C START&STOP signal detect interrupt in the peripheral.*/
if(userConfigPtr->startStopDetect)
{
I2C_HAL_SetStartStopIntCmd(baseAddr,true);
}
#endif
#if FSL_FEATURE_I2C_HAS_STOP_DETECT
/* Enable STOP signal detect interrupt in the peripheral.*/
if(userConfigPtr->stopDetect)
{
I2C_HAL_SetStopIntCmd(baseAddr,true);
}
#endif
/* Enable I2C interrupt as default if setup slave listening mode */
I2C_HAL_SetIntCmd(baseAddr, slave->slaveListening);
/* Enable I2C interrupt from NVIC */
INT_SYS_EnableIRQ(g_i2cIrqId[instance]);
/* Enable the peripheral operation.*/
I2C_HAL_Enable(baseAddr);
}
/*FUNCTION**********************************************************************
*
* Function Name : I2C_DRV_SlaveDeinit
* Description : Shuts down the I2C slave driver.
* This function will clear the control register and turn off the clock to the
* module.
*
*END**************************************************************************/
void I2C_DRV_SlaveDeinit(uint32_t instance)
{
assert(instance < HW_I2C_INSTANCE_COUNT);
uint32_t baseAddr = g_i2cBaseAddr[instance];
i2c_slave_state_t * i2cSlaveState = (i2c_slave_state_t *)g_i2cStatePtr[instance];
#if FSL_FEATURE_I2C_HAS_START_STOP_DETECT
/* Disable I2C START&STOP signal detect interrupt in the peripheral.*/
I2C_HAL_SetStartStopIntCmd(baseAddr,false);
#endif
#if FSL_FEATURE_I2C_HAS_STOP_DETECT
/* Disable STOP signal detect interrupt in the peripheral.*/
I2C_HAL_SetStopIntCmd(baseAddr,false);
#endif
/* Disable I2C interrupt. */
I2C_HAL_SetIntCmd(baseAddr, false);
/* Turn off I2C.*/
I2C_HAL_Disable(baseAddr);
/* Disable clock for I2C.*/
CLOCK_SYS_DisableI2cClock(instance);
/* Disable I2C NVIC interrupt */
INT_SYS_DisableIRQ(g_i2cIrqId[instance]);
/* Destroy sema. */
OSA_EventDestroy(&i2cSlaveState->irqEvent);
/* Clear runtime structure poniter.*/
g_i2cStatePtr[instance] = NULL;
}
/*FUNCTION**********************************************************************
*
* Function Name : I2C_DRV_SlaveDeinit
* Description : Shuts down the I2C slave driver.
* This function will clear the control register and turn off the clock to the
* module.
*
*END*/
i2c_status_t I2C_DRV_SlaveDeinit(uint32_t instance)
{
assert(instance < I2C_INSTANCE_COUNT);
/** Exit if current instance is already de-initialized or is gated.*/
if ((!g_i2cStatePtr[instance]) || (!CLOCK_SYS_GetI2cGateCmd(instance)))
{
return kStatus_I2C_Fail;
}
I2C_Type * base = g_i2cBase[instance];
i2c_slave_state_t * i2cSlaveState = (i2c_slave_state_t *)g_i2cStatePtr[instance];
#if FSL_FEATURE_I2C_HAS_START_STOP_DETECT
/** Disable I2C START&STOP signal detect interrupt in the peripheral.*/
I2C_HAL_SetStartStopIntCmd(base,false);
#endif
#if FSL_FEATURE_I2C_HAS_STOP_DETECT
/** Disable STOP signal detect interrupt in the peripheral.*/
I2C_HAL_SetStopIntCmd(base,false);
#endif
/** Disable I2C interrupt. */
I2C_HAL_SetIntCmd(base, false);
/** Turn off I2C.*/
I2C_HAL_Disable(base);
/** Disable clock for I2C.*/
CLOCK_SYS_DisableI2cClock(instance);
/** Disable I2C NVIC interrupt */
INT_SYS_DisableIRQ(g_i2cIrqId[instance]);
/** Destroy sema. */
OSA_EventDestroy(&i2cSlaveState->irqEvent);
/** Clear runtime structure poniter.*/
g_i2cStatePtr[instance] = NULL;
return kStatus_I2C_Success;
}
