All the following deepsleep callbacks are defined in the PDL and this file only reports the documentation about them as weel as the redefinition to match the asset's signature.
◆ mtb_syspm_autanalog_deepsleep_callback
| #define mtb_syspm_autanalog_deepsleep_callback Cy_AutAnalog_DeepSleepCallback |
Changes the FIFO mode to write only before entering into Deep Sleep mode and restores it to write/read upon wake-up.
- Note
- Changing the FIFO mode applies only to the AC in LP mode.
- Parameters
-
| callbackParams | Callback parameters, see cy_stc_syspm_callback_params_t |
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t
◆ mtb_syspm_ctdac_deepsleep_callback
| #define mtb_syspm_ctdac_deepsleep_callback Cy_CTDAC_DeepSleepCallback |
Callback to prepare the CTDAC before entering and after exiting Deep Sleep mode.
If deglitching is used, it is disabled before entering Deep Sleep to ensure the deglitch switches are closed. This is needed only if the CTDAC will be enabled in DeepSleep. Upon wakeup, deglitching will be re-enabled if it was previously used.
- Parameters
-
| callbackParams | Pointer to structure of type cy_stc_syspm_callback_params_t. The context pointer should point to cy_stc_ctdac_context_t. |
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t
◆ mtb_syspm_hppass_deepsleep_callback
| #define mtb_syspm_hppass_deepsleep_callback Cy_HPPASS_DeepSleepCallback |
DeepSleep callback saves the SAR ADC calibration values before switch to deep sleep power mode and restore them after the wakeup.
- Parameters
-
| callbackParams | Callback parameters |
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t
◆ mtb_syspm_i3c_deepsleep_callback
| #define mtb_syspm_i3c_deepsleep_callback Cy_I3C_DeepSleepCallback |
This function handles transition of I3C controller into and out of deep sleep mode.
- Parameters
-
| callbackParams | The pointer to the callback parameters structure |
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t
◆ mtb_syspm_lpcomp_deepsleep_callback
| #define mtb_syspm_lpcomp_deepsleep_callback Cy_LPComp_DeepSleepCallback |
This function checks the current low-power comparator power mode and disables the low-power comparator block, if there is no wake-up source from the low-power comparator in Deep-Sleep mode.
This function stores the state of the low-power comparator "Enable", disables the low-power comparator block before going to low power modes and then recovers the low-power comparator power "after a wake-up" state using the stored value.
- Parameters
-
| *callbackParams | A cy_stc_syspm_callback_params_t structure with callback parameters that consists of mode, base and context fields: *base - a low-power comparator register structure pointer. *context - context for the call-back function. mode
- CY_SYSPM_CHECK_READY - no action for this state.
- CY_SYSPM_CHECK_FAIL - no action for this state.
- CY_SYSPM_BEFORE_TRANSITION - checks the low-power comparator interrupt mask and power mode and then disables or enables the low-power comparator block per condition. Stores the low-power comparator state to recover the state after a wake up.
- CY_SYSPM_AFTER_TRANSITION - enables the low-power comparator block if it was disabled before Sleep mode.
|
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t
◆ mtb_syspm_lvd_ht_deepsleep_callback
| #define mtb_syspm_lvd_ht_deepsleep_callback Cy_LVD_HT_DeepSleepCallback |
When this function is registered by Cy_SysPm_RegisterCallback - it automatically enables the LVD after wake up from Deep-Sleep mode.
- Parameters
-
| callbackParams | The pointer to the callback parameters structure, see cy_stc_syspm_callback_params_t. |
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t.
◆ mtb_syspm_lvd_deepsleep_callback
| #define mtb_syspm_lvd_deepsleep_callback Cy_LVD_DeepSleepCallback |
When this function is registered by Cy_SysPm_RegisterCallback - it automatically enables the LVD after wake up from Deep-Sleep mode.
- Parameters
-
| callbackParams | The pointer to the callback parameters structure, |
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t.
◆ mtb_syspm_rtc_deepsleep_callback
| #define mtb_syspm_rtc_deepsleep_callback Cy_RTC_DeepSleepCallback |
This function checks the RTC_BUSY bit to avoid data corruption before enters the Deep Sleep mode.
- Parameters
-
| callbackParams | The structure with the SysPm callback parameters |
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t
- Note
- The *base and *context elements are required to be present in the parameter structure because this function uses the SysPm driver callback type. The SysPm driver callback function type requires implementing the function with next parameters and return value:
cy_en_syspm_status_t (*Cy_SysPmCallback) (cy_stc_syspm_callback_params_t *callbackParams, cy_en_syspm_callback_mode_t mode);
◆ mtb_syspm_sar_deepsleep_callback
| #define mtb_syspm_sar_deepsleep_callback Cy_SAR_DeepSleepCallback |
Callback to prepare the SAR before entering Deep Sleep and to re-enable the SAR after exiting Deep Sleep.
- Parameters
-
| callbackParams | Pointer to structure of type cy_stc_syspm_callback_params_t |
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t
◆ mtb_syspm_scb_ezi2c_deepsleep_callback
| #define mtb_syspm_scb_ezi2c_deepsleep_callback Cy_SCB_EZI2C_DeepSleepCallback |
This function handles the transition of the EZI2C SCB into and out of Deep Sleep mode.
It prevents the device from entering Deep Sleep mode if the EZI2C slave is actively communicating. The following behavior of the EZI2C depends on whether the SCB block is wakeup-capable:
- Wakeup-capable: on the incoming EZI2C slave address, the slave receives the address and stretches the clock until the device is woken from Deep Sleep mode. If the slave address occurs before the device enters Deep Sleep mode, the device will not enter Deep Sleep mode.
- Not wakeup-capable: the EZI2C is disabled. It is enabled when the device fails to enter Deep Sleep mode or it is woken from Deep Sleep mode. While the EZI2C is disabled, it stops driving the outputs and ignores the input lines. The slave NACKs all incoming addresses.
- Parameters
-
| callbackParams | The pointer to the callback parameters structure. |
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t
- Note
- Only applicable for rev-08 of the CY8CKIT-062-BLE. For proper operation, when the EZI2C slave is configured to be a wakeup source from Deep Sleep mode, this function must be copied and modified by the user. The EZI2C clock disable code must be inserted in the CY_SYSPM_BEFORE_TRANSITION and clock enable code in the CY_SYSPM_AFTER_TRANSITION mode processing.
◆ mtb_syspm_scb_i2c_deepsleep_callback
| #define mtb_syspm_scb_i2c_deepsleep_callback Cy_SCB_I2C_DeepSleepCallback |
This function handles the transition of the I2C SCB into and out of Deep Sleep mode.
It prevents the device from entering Deep Sleep mode if the I2C slave or master is actively communicating. The behavior of the I2C SCB in Deep Sleep depends on whether the SCB block is wakeup-capable or not:
- Wakeup-capable: during Deep Sleep mode on incoming I2C slave address the slave receives address and stretches the clock until the device is awoken from Deep Sleep mode. If the slave address occurs before the device enters Deep Sleep mode, the device will not enter Deep Sleep mode. Only the I2C slave can be configured to be a wakeup source from Deep Sleep mode.
- Not wakeup-capable: the SCB is disabled in Deep Sleep mode. It is re-enabled if the device fails to enter Deep Sleep mode or when the device is awoken from Deep Sleep mode. While the SCB is disabled it stops driving the outputs and ignores the inputs. The slave NACKs all incoming addresses.
- Parameters
-
| callbackParams | The pointer to the callback parameters structure |
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t
- Note
- Only applicable for rev-08 of the CY8CKIT-062-BLE. For proper operation, when the I2C slave is configured to be a wakeup source from Deep Sleep mode, this function must be copied and modified by the user. The I2C clock disable code must be inserted in the CY_SYSPM_BEFORE_TRANSITION and clock enable code in the CY_SYSPM_AFTER_TRANSITION mode processing.
◆ mtb_syspm_scb_spi_deepsleep_callback
| #define mtb_syspm_scb_spi_deepsleep_callback Cy_SCB_SPI_DeepSleepCallback |
This function handles the transition of the SCB SPI into and out of Deep Sleep mode.
It prevents the device from entering Deep Sleep mode if the SPI slave or master is actively communicating, or there is any data in the TX or RX FIFOs. The following behavior of the SPI SCB depends on whether the SCB block is wakeup-capable or not:
- Wakeup-capable: any transfer intended to the slave wakes up the device from Deep Sleep mode. The slave responds with 0xFF to the transfer and incoming data is ignored. If the transfer occurs before the device enters Deep Sleep mode, the device will not enter Deep Sleep mode and incoming data is stored in the RX FIFO. The SCB clock is disabled before entering Deep Sleep and enabled after the device exits Deep Sleep mode. The SCB clock disabling may lead to corrupted data in the RX FIFO. Clear the RX FIFO after this callback is executed. Note that for proper SPI operation after Deep Sleep the source of hf_clk[0] must be stable, this includes the FLL/PLL. The SysClk callback ensures that hf_clk[0] gets stable and it must be called before Cy_SCB_SPI_DeepSleepCallback. Only the SPI slave can be configured to be a wakeup source from Deep Sleep mode.
- Not wakeup-capable: the SPI is disabled. It is enabled when the device fails to enter Deep Sleep mode or it is awakened from Deep Sleep mode. While the SPI is disabled, it stops driving the outputs and ignores the inputs. Any incoming data is ignored. Refer to section mtb_syspm_group_scb_spi_lp for more information about SPI pins when SCB disabled.
This function must be called during execution of Cy_SysPm_CpuEnterDeepSleep. To do it, register this function as a callback before calling Cy_SysPm_CpuEnterDeepSleep : specify CY_SYSPM_DEEPSLEEP as the callback type and call Cy_SysPm_RegisterCallback.
- Parameters
-
| callbackParams | The pointer to the callback parameters structure |
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t
- Note
- Only applicable for rev-08 of the CY8CKIT-062-BLE. For proper operation, when the SPI slave is configured to be a wakeup source from Deep Sleep mode, this function must be copied and modified by the user. The SPI clock disable code must be inserted in the CY_SYSPM_BEFORE_TRANSITION and clock enable code in the CY_SYSPM_AFTER_TRANSITION mode processing.
◆ mtb_syspm_sd_host_deepsleep_callback
| #define mtb_syspm_sd_host_deepsleep_callback Cy_SD_Host_DeepSleepCallback |
This function handles the transition of the SD Host into and out of Deep Sleep mode.
It disables SD CLK before going to Deep Sleep mode and enables SD CLK after wake up from Deep Sleep mode. If the DAT line is active, or a read (write) transfer is being executed on the bus, the device cannot enter Deep Sleep mode.
This function must be called during execution of Cy_SysPm_CpuEnterDeepSleep. To do it, register this function as a callback before calling Cy_SysPm_CpuEnterDeepSleep : specify CY_SYSPM_DEEPSLEEP as the callback type and call Cy_SysPm_RegisterCallback.
- Note
- When waking up from Deep Sleep, the SD Host driver requires up to 1 us for clock stabilization. By default the SD Host driver will wait this length of time on power up. The waiting loop is implemented in this function. If the application is time sensitive this delay can be overridden by the application by defining CY_SD_HOST_CLK_RAMP_UP_TIME_US_WAKEUP. This allows the application to perform other operations while the clock is stabilizing in the background. However, the application must still make sure that the SD Host clock has had time to stabilize before attempting to use the SD card. The recommended way to override the value is to specify this as a custom define on the compiler command line. This can be done by appending the entry to the DEFINES variable in the application Makefile. Eg: DEFINES+=CY_SD_HOST_CLK_RAMP_UP_TIME_US_WAKEUP=40.
- Parameters
-
| callbackParams | The pointer to the callback parameters structure. |
| mode | Callback mode |
- Returns
- cy_en_syspm_status_t
◆ mtb_syspm_sysclk_deepsleep_callback
| #define mtb_syspm_sysclk_deepsleep_callback Cy_SysClk_DeepSleepCallback |
Callback function to be used when entering system Deep Sleep mode.
This function is applicable if:
- The FLL is enabled
- The PLL is enabled and is driven by ECO
This function performs the following:
- Before entering Deep Sleep, the clock configuration is saved in SRAM. If the FLL/PLL source is the ECO, then the FLL/PLL is bypassed and the source is changed to IMO.
If the FLL is enabled - it is just bypassed.
- Upon wakeup from Deep Sleep, the function waits for ECO stabilization, then restores the configuration and waits for the FLL/PLL to regain their frequency locks.
If ECO is not used and FLL is enabled - it waits for FLL lock and unbypasses it.
The function prevents entry into Deep Sleep mode if the measurement counters are currently counting; see Cy_SysClk_StartClkMeasurementCounters.
This function can be called during execution of Cy_SysPm_CpuEnterDeepSleep. To do so, register this function as a callback before calling Cy_SysPm_CpuEnterDeepSleep - specify CY_SYSPM_DEEPSLEEP as the callback type and call Cy_SysPm_RegisterCallback.
- Note
- This function is recommended to be the last callback that is registered. Doing so minimizes the time spent on low power mode entry and exit.
This function implements all four SysPm callback modes cy_en_syspm_callback_mode_t. So the cy_stc_syspm_callback_t::skipMode must be set to 0UL.
This function does not support such cases as, for example, FLL is enabled but bypassed by user code before entering Deep Sleep.
You can use this callback implementation as an example to design custom low-power callbacks for certain user application.
- Parameters
-
| callbackParams | structure with the syspm callback parameters. |
| mode | Callback mode |
- Returns
- Error / status code; see cy_en_syspm_status_t. Pass if not doing a clock measurement, otherwise Fail. Timeout if timeout waiting for ECO, FLL or PLL to get stable / regain its frequency lock. CY_PRA_STATUS_* - For the PSoC 64 devices there are possible situations when function returns the PRA error status code cy_en_pra_status_t instead of cy_en_sysclk_status_t. This is because for PSoC 64 devices the function uses the PRA driver to change the protected registers. Refer to cy_en_pra_status_t for more details.
