/*FUNCTION**********************************************************************
*
* Function Name : POWER_SYS_GetCurrentMode
* Description : Returns currently running power mode.
*
*END**************************************************************************/
power_manager_modes_t POWER_SYS_GetCurrentMode(void)
{
power_manager_modes_t retVal;
switch (SMC_HAL_GetStat(SMC))
{
#if FSL_FEATURE_SMC_HAS_HIGH_SPEED_RUN_MODE
/* High speed run mode */
case kStatHsrun:
retVal = kPowerManagerHsrun;
break;
#endif
/* Run mode */
case kStatRun:
retVal = kPowerManagerRun;
break;
/* Very low power run mode */
case kStatVlpr:
retVal = kPowerManagerVlpr;
break;
/* This should never happen - core has to be in some run mode to execute code */
default:
retVal = kPowerManagerMax;
break;
}
return retVal;
}
/*FUNCTION**********************************************************************
*
* Function Name : POWER_SYS_GetVeryLowPowerModeStatus
* Description : Returns whether very low power mode is running.
*
*END**************************************************************************/
bool POWER_SYS_GetVeryLowPowerModeStatus(void)
{
/* Get current power mode and return true if it is very low power mode */
uint8_t status = SMC_HAL_GetStat(SMC);
if (status == kStatVlpr)
{
return true;
}
else
{
return false;
}
}
/*FUNCTION**********************************************************************
* Function Name : POWER_SYS_WaitForVlprStatus
* Description :Internal function used by POWER_SYS_SetMode function
*END**************************************************************************/
static power_manager_error_code_t POWER_SYS_WaitForVlprStatus(void)
{
uint32_t i;
for (i=0; SMC_HAL_GetStat(SMC) != kStatVlpr; i++)
{
if(i > POWER_SET_MODE_TIMEOUT)
{
return kPowerManagerErrorSwitch;
}
}
return kPowerManagerSuccess;
}
void displayPowerMode(void)
{
uint32_t smcMode = SMC_HAL_GetStat(SMC_BASE_PTR);
switch (smcMode)
{
case kStatRun:
PRINTF(" SMC mode = kPowerModeRun\n\r");
break;
case kStatVlpr:
PRINTF(" SMC mode = kPowerModeVlpr\n\r");
break;
default:
PRINTF(" SMC mode = Unknown!\n\r");
break;
}
}
void displayPowerMode(void)
{
uint32_t smcMode = SMC_HAL_GetStat(SMC_BASE_PTR);
switch (smcMode)
{
case kStatRun:
PRINTF(" SMC mode = kStatRun\r\n");
break;
case kStatVlpr:
PRINTF(" SMC mode = kPowerModeVlpr\r\n");
break;
case kStatHsrun:
PRINTF(" SMC mode = kPowerModeHsrun\r\n");
break;
default:
PRINTF(" SMC mode = Invalid mode\r\n");
break;
}
}
/*FUNCTION**********************************************************************
*
* Function Name : SMC_HAL_SetMode
* Description : Config the power mode
* This function will configure the power mode control for any run, stop and
* stop submode if needed. It will also configure the power options for specific
* power mode. Application should follow the proper procedure to configure and
* switch power mode between the different run and stop mode. Refer to reference
* manual for the proper procedure and supported power mode that can be configured
* and switch between each other. Refert to smc_power_mode_config_t for required
* parameters to configure the power mode and the supported options. Other options
* may need to configure through the hal driver individaully. Refer to hal driver
* header for details.
*
*END**************************************************************************/
smc_hal_error_code_t SMC_HAL_SetMode(uint32_t baseAddr, const smc_power_mode_config_t *powerModeConfig)
{
smc_hal_error_code_t retCode = kSmcHalSuccess;
uint8_t currentStat;
volatile unsigned int dummyread;
smc_stop_mode_t stopMode;
smc_run_mode_t runMode;
power_mode_stat_t modeStat;
power_modes_t powerModeName = powerModeConfig->powerModeName;
/* verify the power mode name*/
assert(powerModeName < kPowerModeMax);
#if FSL_FEATURE_SMC_HAS_LPWUI
/* check lpwui option*/
if (powerModeConfig->lpwuiOption)
{
/* check current stat*/
currentStat = SMC_HAL_GetStat(baseAddr);
/* if not in VLPR stat, could not set to RUN*/
if (currentStat == kStatRun)
{
SMC_HAL_SetLpwuiMode(baseAddr, powerModeConfig->lpwuiOptionValue);
}
}
#endif
/* branch based on power mode name*/
switch (powerModeName)
{
case kPowerModeRun:
case kPowerModeVlpr:
if (powerModeName == kPowerModeRun)
{
/* mode setting for normal RUN*/
runMode = kSmcRun;
modeStat = kStatVlpr;
}
else
{
/* mode setting for VLPR*/
runMode = kSmcVlpr;
modeStat = kStatRun;
}
/* check current stat*/
currentStat = SMC_HAL_GetStat(baseAddr);
/* if not in VLPR stat, could not set to RUN*/
if (currentStat != modeStat)
{
retCode = kSmcHalFailed;
}
else
{
/* set power mode to normal RUN or VLPR*/
SMC_HAL_SetRunMode(baseAddr, runMode);
}
break;
#if FSL_FEATURE_SMC_HAS_HIGH_SPEED_RUN_MODE
case kPowerModeHsrun:
/* mode setting for HSRUN (high speed run) */
runMode = kSmcHsrun;
modeStat = kStatRun;
/* check current stat*/
currentStat = SMC_HAL_GetStat(baseAddr);
if (currentStat != modeStat)
{
/* if not in the mode, return error*/
retCode = kSmcHalFailed;
}
else
{
/* set power mode to normal RUN or VLPR mode first*/
SMC_HAL_SetRunMode(baseAddr, runMode);
}
break;
#endif
case kPowerModeWait:
case kPowerModeVlpw:
if (powerModeName == kPowerModeWait)
{
/* mode setting for normal RUN*/
runMode = kSmcRun;
modeStat = kStatRun;
}
else
{
/* mode setting for VLPR*/
runMode = kSmcVlpr;
modeStat = kStatVlpr;
}
/* check current stat*/
currentStat = SMC_HAL_GetStat(baseAddr);
if (currentStat != modeStat)
{
/* if not in the mode, return error*/
retCode = kSmcHalFailed;
}
else
{
/* set power mode to normal RUN or VLPR mode first*/
SMC_HAL_SetRunMode(baseAddr, runMode);
}
if (retCode == kSmcHalSuccess)
{
/* Clear the SLEEPDEEP bit to disable deep sleep mode - enter wait mode*/
SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
__WFI();
}
break;
case kPowerModeStop:
case kPowerModeVlps:
case kPowerModeLls:
if (powerModeName == kPowerModeStop)
{
#if FSL_FEATURE_SMC_HAS_HIGH_SPEED_RUN_MODE
/* check current stat*/
currentStat = SMC_HAL_GetStat(baseAddr);
if ((currentStat == kStatHsrun) || (SMC_HAL_GetRunMode(baseAddr) == kSmcHsrun))
{
retCode = kSmcHalFailed;
break;
}
#endif
stopMode = kSmcStop;
#if FSL_FEATURE_SMC_HAS_PSTOPO
if (powerModeConfig->pstopOption)
{
SMC_HAL_SetPstopMode(baseAddr, powerModeConfig->pstopOptionValue);
}
#endif
}
else if (powerModeName == kPowerModeVlps)
{
stopMode = kSmcVlps;
}
else
{
stopMode = kSmcLls;
}
/* set power mode to specified STOP mode*/
SMC_HAL_SetStopMode(baseAddr, stopMode);
#if FSL_FEATURE_SMC_HAS_LLS_SUBMODE
if (powerModeName == kPowerModeLls)
{
/* further set the stop sub mode configuration*/
SMC_HAL_SetStopSubMode(baseAddr, powerModeConfig->stopSubMode);
}
#endif
/* wait for write to complete to SMC before stopping core */
dummyread = SMC_HAL_GetStat(baseAddr);
dummyread = dummyread + 1;
/* Set the SLEEPDEEP bit to enable deep sleep mode (STOP)*/
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
__WFI();
break;
case kPowerModeVlls:
/* set power mode to specified STOP mode*/
SMC_HAL_SetStopMode(baseAddr, kSmcVlls);
/* further set the stop sub mode configuration*/
SMC_HAL_SetStopSubMode(baseAddr, powerModeConfig->stopSubMode);
/* check if Vlls0 option needs configuration*/
if (powerModeConfig->stopSubMode == kSmcStopSub0)
{
#if FSL_FEATURE_SMC_HAS_PORPO
if (powerModeConfig->porOption)
{
SMC_HAL_SetPorMode(baseAddr, powerModeConfig->porOptionValue);
}
#endif
}
/* wait for write to complete to SMC before stopping core */
dummyread = SMC_HAL_GetStat(baseAddr);
dummyread = dummyread + 1;
/* Set the SLEEPDEEP bit to enable deep sleep mode (STOP)*/
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
__WFI();
break;
default:
retCode = kSmcHalNoSuchModeName;
break;
}
return retCode;
}
/*!
* @brief main function
*/
int main(void)
{
i2c_slave_state_t slave;
i2cData_t i2cData =
{
.subAddress = Invalid_Subaddress_Index,
.data = 0,
.state = CMD_MODE
};
i2c_slave_user_config_t userConfig =
{
.address = 0x3A,
.slaveListening = true,
.slaveCallback = i2c_slave_event_callback_passive,
.callbackParam = &i2cData,
#if FSL_FEATURE_I2C_HAS_START_STOP_DETECT
.startStopDetect = false,
#endif
#if FSL_FEATURE_I2C_HAS_STOP_DETECT
.stopDetect = false,
#endif
};
// Low Power Configuration
smc_power_mode_config_t smcConfig;
// Init struct
memset(&smcConfig, 0, sizeof(smcConfig));
hardware_init();
OSA_Init();
GPIO_DRV_Init(0, ledPins);
// Initiate I2C instance module
I2C_DRV_SlaveInit(BOARD_I2C_INSTANCE, &userConfig, &slave);
PRINTF("\r\n====== I2C Slave ======\r\n\r\n");
// turn LED_slave on to indicate I2C slave status is waiting for date receiving
LED_turnon_slave();
LED_turnoff_master();
OSA_TimeDelay(50);
PRINTF("\r\n I2C slave enters low power mode...\r\n");
// set to allow entering specific modes
SMC_HAL_SetProtection(SMC, kAllowPowerModeVlp);
// set power mode to specific Run mode
#if FSL_FEATURE_SMC_HAS_LPWUI
smcConfig.lpwuiOptionValue = kSmcLpwuiEnabled;
#endif
#if FSL_FEATURE_SMC_HAS_PORPO
smcConfig.porOptionValue = kSmcPorEnabled;
#endif
#if FSL_FEATURE_SMC_HAS_HIGH_SPEED_RUN_MODE
smcConfig.powerModeName = kPowerModeRun;
// If current status is HSRUN mode, change to RUN mode first.
if (kStatHsrun == SMC_HAL_GetStat(SMC_BASE_PTR))
{
SMC_HAL_SetMode(SMC_BASE_PTR, &smcConfig);
}
#endif
smcConfig.powerModeName = kPowerModeWait;
// Entry to Low Power Mode
SMC_HAL_SetMode(SMC_BASE_PTR, &smcConfig);
// LED_slave is still on during low power mode until I2C master send data to slave.
// Turn off LED_slave to indicate MCU wake up by I2C address matching interrupt
LED_turnoff_slave();
PRINTF("\r\n I2C slave wakes up from low power mode by I2C address matching.\r\n");
while(1);
}