/*******************************************************************************
* Function Name: I2C_1_Stop
********************************************************************************
*
* Summary:
* Disables the SCB component and its interrupt.
* It also disables all TX interrupt sources so as not to cause an unexpected
* interrupt trigger because after the component is enabled, the TX FIFO
* is empty.
*
* Parameters:
* None
*
* Return:
* None
*
*******************************************************************************/
void I2C_1_Stop(void)
{
#if (I2C_1_SCB_IRQ_INTERNAL)
I2C_1_DisableInt();
#endif /* (I2C_1_SCB_IRQ_INTERNAL) */
/* Call Stop function specific to current operation mode */
I2C_1_ScbModeStop();
/* Disable SCB IP */
I2C_1_CTRL_REG &= (uint32) ~I2C_1_CTRL_ENABLED;
/* Disable all TX interrupt sources so as not to cause an unexpected
* interrupt trigger because after the component is enabled, the TX FIFO
* is empty.
* For SCB IP v0, it is critical as it does not mask-out interrupt
* sources when they are disabled. This can cause a code lock-up in the
* interrupt handler because TX FIFO cannot be loaded after the block
* is disabled.
*/
I2C_1_SetTxInterruptMode(I2C_1_NO_INTR_SOURCES);
#if (I2C_1_SCB_IRQ_INTERNAL)
I2C_1_ClearPendingInt();
#endif /* (I2C_1_SCB_IRQ_INTERNAL) */
}
/*******************************************************************************
* Function Name: I2C_1_Stop
********************************************************************************
*
* Summary:
* Disables the SCB component and its interrupt.
*
* Parameters:
* None
*
* Return:
* None
*
*******************************************************************************/
void I2C_1_Stop(void)
{
#if(I2C_1_SCB_IRQ_INTERNAL)
I2C_1_DisableInt();
#endif /* (I2C_1_SCB_IRQ_INTERNAL) */
I2C_1_CTRL_REG &= (uint32) ~I2C_1_CTRL_ENABLED; /* Disable scb IP */
#if(I2C_1_SCB_IRQ_INTERNAL)
I2C_1_ClearPendingInt();
#endif /* (I2C_1_SCB_IRQ_INTERNAL) */
I2C_1_ScbModeStop(); /* Calls scbMode specific Stop function */
}
/*******************************************************************************
* Function Name: I2C_1_I2CStop
********************************************************************************
*
* Summary:
* Resets the I2C FSM into the default state and disables TX interrupt sources.
*
* Parameters:
* None
*
* Return:
* None
*
* Global variables:
*
*
*******************************************************************************/
void I2C_1_I2CStop(void)
{
/* Disable TX interrupt sources in order not to cause a false trigger.
* The incoming transaction will enable an appropriate TX interrupt.
*/
I2C_1_SetTxInterruptMode(I2C_1_NO_INTR_SOURCES);
#if(I2C_1_CY_SCBIP_V0)
/* Clear pending interrupt as TX FIFO becomes empty and block does not gate interrupt trigger when disabled */
I2C_1_ClearPendingInt();
#endif /* (I2C_1_CY_SCBIP_V0) */
I2C_1_state = I2C_1_I2C_FSM_IDLE;
}
/*******************************************************************************
* Function Name: I2C_1_Stop
********************************************************************************
*
* Summary:
* Disables I2C hardware and disables I2C interrupt. Disables Active mode power
* template bits or clock gating as appropriate.
*
* Parameters:
* None
*
* Return:
* None
*
*******************************************************************************/
void I2C_1_Stop(void)
{
#if((I2C_1_FF_IMPLEMENTED) || \
(I2C_1_UDB_IMPLEMENTED && I2C_1_MODE_SLAVE_ENABLED))
uint8 enableInterrupts;
#endif /* ((I2C_1_FF_IMPLEMENTED) || \
(I2C_1_UDB_IMPLEMENTED && I2C_1_MODE_SLAVE_ENABLED)) */
I2C_1_DisableInt();
I2C_1_DISABLE_INT_ON_STOP; /* Interrupt on Stop can be enabled by write */
(void) I2C_1_CSR_REG; /* Clear CSR reg */
#if(I2C_1_TIMEOUT_ENABLED)
I2C_1_TimeoutStop();
#endif /* End (I2C_1_TIMEOUT_ENABLED) */
#if(I2C_1_FF_IMPLEMENTED)
#if(CY_PSOC3 || CY_PSOC5LP)
/* Store registers which are held in reset when Master and Slave bits are cleared */
#if(I2C_1_MODE_SLAVE_ENABLED)
I2C_1_backup.addr = I2C_1_ADDR_REG;
#endif /* (I2C_1_MODE_SLAVE_ENABLED) */
I2C_1_backup.clkDiv1 = I2C_1_CLKDIV1_REG;
I2C_1_backup.clkDiv2 = I2C_1_CLKDIV2_REG;
/* Reset FF block */
I2C_1_CFG_REG &= ((uint8) ~I2C_1_ENABLE_MS);
CyDelayUs(I2C_1_FF_RESET_DELAY);
I2C_1_CFG_REG |= ((uint8) I2C_1_ENABLE_MS);
/* Restore registers */
#if(I2C_1_MODE_SLAVE_ENABLED)
I2C_1_ADDR_REG = I2C_1_backup.addr;
#endif /* (I2C_1_MODE_SLAVE_ENABLED) */
I2C_1_CLKDIV1_REG = I2C_1_backup.clkDiv1;
I2C_1_CLKDIV2_REG = I2C_1_backup.clkDiv2;
#endif /* (CY_PSOC3 || CY_PSOC5LP) */
/* Disable power to I2C block */
enableInterrupts = CyEnterCriticalSection();
I2C_1_ACT_PWRMGR_REG &= ((uint8) ~I2C_1_ACT_PWR_EN);
I2C_1_STBY_PWRMGR_REG &= ((uint8) ~I2C_1_STBY_PWR_EN);
CyExitCriticalSection(enableInterrupts);
#else
#if(I2C_1_MODE_SLAVE_ENABLED)
/* Disable slave bit counter */
enableInterrupts = CyEnterCriticalSection();
I2C_1_COUNTER_AUX_CTL_REG &= ((uint8) ~I2C_1_CNT7_ENABLE);
CyExitCriticalSection(enableInterrupts);
#endif /* (I2C_1_MODE_SLAVE_ENABLED) */
I2C_1_CFG_REG &= ((uint8) ~I2C_1_ENABLE_MS);
#endif /* (I2C_1_FF_IMPLEMENTED) */
I2C_1_ClearPendingInt(); /* Clear interrupt triggers on reset */
I2C_1_state = I2C_1_SM_IDLE; /* Reset software FSM */
}
