Functions

General Description

Functions
void	Cy_PRA_Init (void)
	Initializes the PRA driver: More...
cy_en_pra_status_t	Cy_PRA_SendCmd (uint16_t cmd, uint16_t regIndex, uint32_t clearMask, uint32_t setMask)
	Takes the parameters, passes them to the secure Cortex-M0+ via IPC, waits for Cortex-M0+ to finish and reports the status. More...
cy_en_pra_status_t	Cy_PRA_SystemConfig (const cy_stc_pra_system_config_t *devConfig)
	Validates cy_stc_pra_system_config_t and applies the provided settings. More...

Function Documentation

Cy_PRA_Init()

void Cy_PRA_Init

(

void

)

Initializes the PRA driver:

• Initializes the register access array with the register addresses (Cortex-M0+)
• Sets up the IPC communication between CPU cores
• Checks that the driver versions match on the Cortex-M0+ and Cortex-M4 sides.

Call the function before accessing any protected registers. It is called during a device startup from SystemInit().

Cy_PRA_SendCmd()

cy_en_pra_status_t Cy_PRA_SendCmd	(	uint16_t	cmd,
		uint16_t	regIndex,
		uint32_t	clearMask,
		uint32_t	setMask
	)

Takes the parameters, passes them to the secure Cortex-M0+ via IPC, waits for Cortex-M0+ to finish and reports the status.

Parameters

cmd	The command to execute on the secure side. The macros for this parameter are defined in the cy_pra.h file with the CY_PRA_MSG_TYPE_ prefix.
regIndex	The index of the function or register depending on the command parameter. The macros for this parameter are defined in the cy_pra.h file with the CY_PRA_INDX_ prefix.
clearMask	Data sent to secure the core.
setMask	Additional data send to secure the core.

Returns

The command execution status. For the register read command, the read value is returned.

Cy_PRA_SystemConfig()

cy_en_pra_status_t Cy_PRA_SystemConfig

(

const cy_stc_pra_system_config_t *

devConfig

)

Validates cy_stc_pra_system_config_t and applies the provided settings.

Parameters

devConfig

The device configuration structure initialized with Device Configurator.

Returns

cy_en_pra_status_t

Function Usage

    /* Scenario: there is a need to be done in case then PDL is used
     * in standalone mode without Board Support Packages
     * (that uses Device Configurator utility to provide
     * GeneratedSource folder for the initial configuration
     * of the device).
     */
    cy_en_pra_status_t status = CY_PRA_STATUS_INVALID_PARAM;

    cy_stc_pra_system_config_t sysConfig =
    {
        .powerEnable=true,
        .ldoEnable=true,
        .pmicEnable=false,
        .vBackupVDDDEnable=true,
        .ulpEnable=false,
        .ecoEnable=false,
        .extClkEnable=false,
        .iloEnable=true,
        .wcoEnable=false,
        .fllEnable=false,
        .pll0Enable=false,
        .pll1Enable=false,
        .path0Enable=true,
        .path1Enable=false,
        .path2Enable=false,
        .path3Enable=false,
        .path4Enable=false,
        .path5Enable=false,
        .clkFastEnable=true,
        .clkPeriEnable=true,
        .clkSlowEnable=true,
        .clkHF0Enable=true,
        .clkHF1Enable=false,
        .clkHF2Enable=false,
        .clkHF3Enable=false,
        .clkHF4Enable=false,
        .clkHF5Enable=false,
        .clkPumpEnable=false,
        .clkLFEnable=true,
        .clkBakEnable=false,
        .clkTimerEnable=false,
        .clkAltSysTickEnable=false,
        .piloEnable=false,
        .clkAltHfEnable=false,
        .ldoVoltage=(cy_en_syspm_ldo_voltage_t)CY_SYSPM_LDO_VOLTAGE_LP,
        .buckVoltage=(cy_en_syspm_buck_voltage1_t)0,
        .pwrCurrentModeMin=false,
        .ecoFreqHz=0,
        .ecoLoad=0,
        .ecoEsr=0,
        .ecoDriveLevel=0,
        .ecoInPort=(GPIO_PRT_Type *)0x0,
        .ecoOutPort=(GPIO_PRT_Type *)0x0,
        .ecoInPinNum=0,
        .ecoOutPinNum=0,
        .extClkFreqHz=0,
        .extClkPort=(GPIO_PRT_Type *)0x0,
        .extClkPinNum=0,
        .extClkHsiom=(en_hsiom_sel_t)HSIOM_SEL_GPIO,
        .iloHibernateON=true,
        .bypassEnable=false,
        .wcoInPort=(GPIO_PRT_Type *)0x0,
        .wcoOutPort=(GPIO_PRT_Type *)0x0,
        .wcoInPinNum=0,
        .wcoOutPinNum=0,
        .fllOutFreqHz=0,
        .fllMult=0,
        .fllRefDiv=0,
        .fllCcoRange=(cy_en_fll_cco_ranges_t)CY_SYSCLK_FLL_CCO_RANGE0,
        .enableOutputDiv=false,
        .lockTolerance=0,
        .igain=0,
        .pgain=0,
        .settlingCount=0,
        .outputMode=(cy_en_fll_pll_output_mode_t)CY_SYSCLK_FLLPLL_OUTPUT_AUTO,
        .ccoFreq=0,
        .pll0OutFreqHz=0,
        .pll0FeedbackDiv=0,
        .pll0ReferenceDiv=0,
        .pll0OutputDiv=0,
        .pll0LfMode=false,
        .pll0OutputMode=(cy_en_fll_pll_output_mode_t)CY_SYSCLK_FLLPLL_OUTPUT_AUTO,
        .pll1OutFreqHz=0,
        .pll1FeedbackDiv=0,
        .pll1ReferenceDiv=0,
        .pll1OutputDiv=0,
        .pll1LfMode=false,
        .pll1OutputMode=(cy_en_fll_pll_output_mode_t)CY_SYSCLK_FLLPLL_OUTPUT_AUTO,
        .path0Src=(cy_en_clkpath_in_sources_t)CY_SYSCLK_CLKPATH_IN_IMO,
        .path1Src=(cy_en_clkpath_in_sources_t)CY_SYSCLK_CLKPATH_IN_IMO,
        .path2Src=(cy_en_clkpath_in_sources_t)CY_SYSCLK_CLKPATH_IN_IMO,
        .path3Src=(cy_en_clkpath_in_sources_t)CY_SYSCLK_CLKPATH_IN_IMO,
        .path4Src=(cy_en_clkpath_in_sources_t)CY_SYSCLK_CLKPATH_IN_IMO,
        .path5Src=(cy_en_clkpath_in_sources_t)CY_SYSCLK_CLKPATH_IN_IMO,
        .clkFastDiv=0,
        .clkPeriDiv=0,
        .clkSlowDiv=0,
        .hf0Source=(cy_en_clkhf_in_sources_t)CY_SYSCLK_CLKHF_IN_CLKPATH0,
        .hf0Divider=(cy_en_clkhf_dividers_t)CY_SYSCLK_CLKHF_NO_DIVIDE,
        .hf0OutFreqMHz=8,
        .hf1Source=(cy_en_clkhf_in_sources_t)CY_SYSCLK_CLKHF_IN_CLKPATH0,
        .hf1Divider=(cy_en_clkhf_dividers_t)CY_SYSCLK_CLKHF_NO_DIVIDE,
        .hf1OutFreqMHz=0,
        .hf2Source=(cy_en_clkhf_in_sources_t)CY_SYSCLK_CLKHF_IN_CLKPATH0,
        .hf2Divider=(cy_en_clkhf_dividers_t)CY_SYSCLK_CLKHF_NO_DIVIDE,
        .hf2OutFreqMHz=0,
        .hf3Source=(cy_en_clkhf_in_sources_t)CY_SYSCLK_CLKHF_IN_CLKPATH0,
        .hf3Divider=(cy_en_clkhf_dividers_t)CY_SYSCLK_CLKHF_NO_DIVIDE,
        .hf3OutFreqMHz=0,
        .hf4Source=(cy_en_clkhf_in_sources_t)CY_SYSCLK_CLKHF_IN_CLKPATH0,
        .hf4Divider=(cy_en_clkhf_dividers_t)CY_SYSCLK_CLKHF_NO_DIVIDE,
        .hf4OutFreqMHz=0,
        .hf5Source=(cy_en_clkhf_in_sources_t)CY_SYSCLK_CLKHF_IN_CLKPATH0,
        .hf5Divider=(cy_en_clkhf_dividers_t)CY_SYSCLK_CLKHF_NO_DIVIDE,
        .hf5OutFreqMHz=0,
        .pumpSource=(cy_en_clkpump_in_sources_t)CY_SYSCLK_PUMP_IN_CLKPATH0,
        .pumpDivider=(cy_en_clkpump_divide_t)CY_SYSCLK_PUMP_NO_DIV,
        .clkLfSource=(cy_en_clklf_in_sources_t)CY_SYSCLK_CLKLF_IN_ILO,
        .clkBakSource=(cy_en_clkbak_in_sources_t)CY_SYSCLK_BAK_IN_WCO,
        .clkTimerSource=(cy_en_clktimer_in_sources_t)CY_SYSCLK_CLKTIMER_IN_IMO,
        .clkTimerDivider=0,
        .clkSrcAltSysTick =(cy_en_systick_clock_source_t)CY_SYSTICK_CLOCK_SOURCE_CLK_LF,
        .altHFcLoad=0,
        .altHFxtalStartUpTime=0,
        .altHFclkFreq=0,
        .altHFsysClkDiv=0,
        .altHFvoltageReg=0
    };

    status = CY_PRA_FUNCTION_CALL_RETURN_PARAM(CY_PRA_MSG_TYPE_SYS_CFG_FUNC,
                                               CY_PRA_FUNC_INIT_CYCFG_DEVICE,
                                               &sysConfig);