LPC Exported Functions

group LPC_Exported_Functions

Functions

void LPC_DeInit(void)

Reset LPC.

Returns:: None.

void LPC_Init(LPC_InitTypeDef *LPC_InitStruct)

Initialize LPC peripheral according to the specified parameters in LPC_InitStruct.

Example usage

void driver_lpc_init(void)
{
    LPC_InitTypeDef LPC_InitStruct;

    LPC_StructInit(&LPC_InitStruct);
    LPC_InitStruct.LPC_Channel   = LPC_CAPTURE_CHANNEL;
    LPC_InitStruct.LPC_Edge      = LPC_VOLTAGE_DETECT_EDGE;
    LPC_InitStruct.LPC_Threshold = LPC_VOLTAGE_DETECT_THRESHOLD;
    LPC_Init(&LPC_InitStruct);
    LPC_Cmd(ENABLE);

    LPC_ResetCounter();
    LPC_SetCompValue(LPC_COMP_VALUE);
    LPC_CounterCmd(ENABLE);
    LPC_INTConfig(LPC_INT_LPCOMP_CNT, ENABLE);

    NVIC_InitTypeDef NVIC_InitStruct;
    NVIC_InitStruct.NVIC_IRQChannel = LPCOMP_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelPriority = 2;
    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStruct);
    LPC_INTCmd(ENABLE);
}

Parameters:: LPC_InitStruct – [in] Pointer to a LPC_InitTypeDef structure that contains the configuration information for the specified LPC peripheral.
Returns:: None.

void LPC_StructInit(LPC_InitTypeDef *LPC_InitStruct)

Fill each LPC_InitStruct member with its default value.

Example usage

void driver_lpc_init(void)
{
    LPC_InitTypeDef LPC_InitStruct;

    LPC_StructInit(&LPC_InitStruct);
    LPC_InitStruct.LPC_Channel   = LPC_CAPTURE_CHANNEL;
    LPC_InitStruct.LPC_Edge      = LPC_VOLTAGE_DETECT_EDGE;
    LPC_InitStruct.LPC_Threshold = LPC_VOLTAGE_DETECT_THRESHOLD;
    LPC_Init(&LPC_InitStruct);
}

Parameters:: LPC_InitStruct – [in] : Pointer to a LPC_InitTypeDef structure which will be initialized.
Returns:: None.

void LPC_Cmd(FunctionalState NewState)

Enable or disable LPC peripheral.

Example usage

void driver_lpc_init(void)
{
    LPC_InitTypeDef LPC_InitStruct;

    LPC_StructInit(&LPC_InitStruct);
    LPC_InitStruct.LPC_Channel   = LPC_CAPTURE_CHANNEL;
    LPC_InitStruct.LPC_Edge      = LPC_VOLTAGE_DETECT_EDGE;
    LPC_InitStruct.LPC_Threshold = LPC_VOLTAGE_DETECT_THRESHOLD;
    LPC_Init(&LPC_InitStruct);
    LPC_Cmd(ENABLE);
}

Parameters:: NewState – [in] New state of LPC peripheral. This parameter can be: ENABLE or DISABLE.
Returns:: None.

void LPC_CounterCmd(FunctionalState NewState)

Start or stop the LPC counter.

Example usage

void driver_lpc_init(void)
{
    LPC_InitTypeDef LPC_InitStruct;

    LPC_StructInit(&LPC_InitStruct);
    LPC_InitStruct.LPC_Channel   = LPC_CAPTURE_CHANNEL;
    LPC_InitStruct.LPC_Edge      = LPC_VOLTAGE_DETECT_EDGE;
    LPC_InitStruct.LPC_Threshold = LPC_VOLTAGE_DETECT_THRESHOLD;
    LPC_Init(&LPC_InitStruct);
    LPC_Cmd(ENABLE);

    LPC_ResetCounter();
    LPC_SetCompValue(LPC_COMP_VALUE);
    LPC_CounterCmd(ENABLE);
}

Parameters:

NewState – [in] New state of the LPC counter. This parameter can be one of the following values:

ENABLE: Start LPCOMP counter.
DISABLE: Stop LPCOMP counter.

Returns:

None.

void LPC_INTConfig(uint32_t LPC_INT, FunctionalState NewState)

Enable or disable the specified LPC interrupts.

Example usage

void driver_lpc_init(void)
{
    LPC_InitTypeDef LPC_InitStruct;

    LPC_StructInit(&LPC_InitStruct);
    LPC_InitStruct.LPC_Channel   = LPC_CAPTURE_CHANNEL;
    LPC_InitStruct.LPC_Edge      = LPC_VOLTAGE_DETECT_EDGE;
    LPC_InitStruct.LPC_Threshold = LPC_VOLTAGE_DETECT_THRESHOLD;
    LPC_Init(&LPC_InitStruct);
    LPC_Cmd(ENABLE);

    LPC_ResetCounter();
    LPC_SetCompValue(LPC_COMP_VALUE);
    LPC_CounterCmd(ENABLE);
    LPC_INTConfig(LPC_INT_LPCOMP_CNT, ENABLE);

    NVIC_InitTypeDef NVIC_InitStruct;
    NVIC_InitStruct.NVIC_IRQChannel = LPCOMP_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelPriority = 2;
    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStruct);

    LPC_INTCmd(ENABLE);
}

Parameters:

LPC_INT – [in] Specify the LPC interrupt source to be enabled or disabled. This parameter can be one of the following values, which refer to LPC Interrupts Definition.
- LPC_INT_LPCOMP_VOL: Voltage detection interrupt source. If Vin<Vth, cause this interrupt.
- LPC_INT_LPCOMP_CNT: Counter comparator interrupt source.
NewState – [in] New state of the specified LPC interrupt. This parameter can be: ENABLE or DISABLE.

Returns:

None.

void LPC_INTCmd(FunctionalState NewState)

Enable LPC interrupt signal to CPU NVIC.

Example usage

void driver_lpc_init(void)
{
    LPC_InitTypeDef LPC_InitStruct;

    LPC_StructInit(&LPC_InitStruct);
    LPC_InitStruct.LPC_Channel   = LPC_CAPTURE_CHANNEL;
    LPC_InitStruct.LPC_Edge      = LPC_VOLTAGE_DETECT_EDGE;
    LPC_InitStruct.LPC_Threshold = LPC_VOLTAGE_DETECT_THRESHOLD;
    LPC_Init(&LPC_InitStruct);
    LPC_Cmd(ENABLE);

    LPC_ResetCounter();
    LPC_SetCompValue(LPC_COMP_VALUE);
    LPC_CounterCmd(ENABLE);
    LPC_INTConfig(LPC_INT_LPCOMP_CNT, ENABLE);
    LPC_CompOutputConfig(ENABLE);

    NVIC_InitTypeDef NVIC_InitStruct;
    NVIC_InitStruct.NVIC_IRQChannel = LPCOMP_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelPriority = 2;
    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStruct);

    LPC_INTCmd(ENABLE);
}

Parameters:: NewState – [in] Enable or disable RTC interrupt signal to CCU. This parameter can be: ENABLE or DISABLE.
Returns:: None.

void LPC_WKCmd(FunctionalState NewState)

Enable wakeup signal to power sequence.

Example usage

void driver_lpc_init(void)
{
    LPC_InitTypeDef LPC_InitStruct;

    LPC_StructInit(&LPC_InitStruct);
    LPC_InitStruct.LPC_Channel   = LPC_CAPTURE_CHANNEL;
    LPC_InitStruct.LPC_Edge      = LPC_VOLTAGE_DETECT_EDGE;
    LPC_InitStruct.LPC_Threshold = LPC_VOLTAGE_DETECT_THRESHOLD;
    LPC_Init(&LPC_InitStruct);
    LPC_Cmd(ENABLE);

    LPC_ResetCounter();
    LPC_SetCompValue(LPC_COMP_VALUE);
    LPC_CounterCmd(ENABLE);
    LPC_INTConfig(LPC_INT_LPCOMP_CNT, ENABLE);
    LPC_INTCmd(ENABLE);
    LPC_WKCmd(ENABLE);

    NVIC_InitTypeDef NVIC_InitStruct;
    NVIC_InitStruct.NVIC_IRQChannel = LPCOMP_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelPriority = 2;
    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStruct);
}

Parameters:: NewState – [in] Enable or disable LPC wakeup signal to power sequence. This parameter can be: ENABLE or DISABLE.
Returns:: None.

void LPC_SetCompValue(uint32_t value)

Configure LPCOMP counter’s comparator value.

Example usage

void driver_lpc_init(void)
{
    LPC_InitTypeDef LPC_InitStruct;

    LPC_StructInit(&LPC_InitStruct);
    LPC_InitStruct.LPC_Channel   = LPC_CAPTURE_CHANNEL;
    LPC_InitStruct.LPC_Edge      = LPC_VOLTAGE_DETECT_EDGE;
    LPC_InitStruct.LPC_Threshold = LPC_VOLTAGE_DETECT_THRESHOLD;
    LPC_Init(&LPC_InitStruct);
    LPC_Cmd(ENABLE);

    LPC_ResetCounter();
    LPC_SetCompValue(LPC_COMP_VALUE);
    LPC_CounterCmd(ENABLE);
}

Parameters:: value – [in] LPCOMP counter’s comparator value which can be 0 to 0xfff.
Returns:: None.

void LPC_ResetCounter(void)

Reset the LPC counter.

Example usage

void driver_lpc_init(void)
{
    LPC_InitTypeDef LPC_InitStruct;

    LPC_StructInit(&LPC_InitStruct);
    LPC_InitStruct.LPC_Channel   = LPC_CAPTURE_CHANNEL;
    LPC_InitStruct.LPC_Edge      = LPC_VOLTAGE_DETECT_EDGE;
    LPC_InitStruct.LPC_Threshold = LPC_VOLTAGE_DETECT_THRESHOLD;
    LPC_Init(&LPC_InitStruct);
    LPC_Cmd(ENABLE);

    LPC_ResetCounter();
    LPC_SetCompValue(LPC_COMP_VALUE);
    LPC_CounterCmd(ENABLE);
}

Returns:: None.

FlagStatus LPC_GetFlagStatus(uint32_t LPC_FLAG)

Check whether the specified LPC interrupt is set or not.

Parameters:

LPC_FLAG – [in] Specify the LPC interrupt to check. This parameter can be one of the following values, which refer to LPC Flags Definition.

LPC_FLAG_LPCOMP_AON: counter comparator AON flag.
LPC_FLAG_LPCOMP_CNT: counter comparator flag.

Returns:

LPC_FLAG: The new state of LPC_INT (SET or RESET).

void LPC_ClearFlag(uint32_t LPC_FLAG)

Clear the specified LPC flag.

Parameters:

LPC_FLAG – [in] Specify the LPC flag to clear. This parameter can be one of the following values:

LPC_FLAG_LPCOMP_CNT: counter comparator flag.

Returns:

None.

ITStatus LPC_GetINTStatus(uint32_t LPC_INT)

Checks whether the specified LPC interrupt is set or not.

Example usage

#define LPC_CAPTURE_PIN                 P2_3
#define LPC_CAPTURE_CHANNEL             LPC_CAPTURE_PIN - P2_0

#define LPC_VOLTAGE_DETECT_EDGE         LPC_Vin_Over_Vth;
#define LPC_VOLTAGE_DETECT_THRESHOLD    LPC_2400_mV;
#define LPC_COMP_VALUE                  0x0A//A LPC comparator interrupt occurs every ten times

void board_lpc_init(void)
{
    Pad_Config(LPC_CAPTURE_PIN, PAD_PINMUX_MODE, PAD_IS_PWRON, PAD_PULL_NONE, PAD_OUT_DISABLE,
               PAD_OUT_HIGH);
    Pinmux_Config(LPC_CAPTURE_PIN, IDLE_MODE);
}

void driver_lpc_init(void)
{
    LPC_InitTypeDef LPC_InitStruct;

    LPC_StructInit(&LPC_InitStruct);
    LPC_InitStruct.LPC_Channel   = LPC_CAPTURE_CHANNEL;
    LPC_InitStruct.LPC_Edge      = LPC_VOLTAGE_DETECT_EDGE;
    LPC_InitStruct.LPC_Threshold = LPC_VOLTAGE_DETECT_THRESHOLD;
    LPC_Init(&LPC_InitStruct);
    LPC_Cmd(ENABLE);

    LPC_ResetCounter();
    LPC_SetCompValue(LPC_COMP_VALUE);
    LPC_CounterCmd(ENABLE);
    LPC_INTConfig(LPC_INT_LPCOMP_CNT, ENABLE);

    NVIC_InitTypeDef NVIC_InitStruct;
    NVIC_InitStruct.NVIC_IRQChannel = LPCOMP_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelPriority = 2;
    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStruct);

    LPC_INTCmd(ENABLE);
}

void lpc_demo(void)
{
    board_lpc_init();
    driver_lpc_init();
}

void LPCOMP_Handler(void)
{
    if (LPC_GetINTStatus(LPC_INT_LPCOMP_CNT) == SET)
    {
        LPC_SetCompValue(LPC_GetCounter() + LPC_COMP_VALUE);
        LPC_ClearINTPendingBit(LPC_INT_LPCOMP_CNT);
    }
}

Parameters:

LPC_INT – [in] Specify the LPC interrupt to check. This parameter can be one of the following values:

LPC_INT_LPCOMP_CNT: counter comparator interrupt.

Returns:

The new state of LPC_INT (SET or RESET).

void LPC_ClearINTPendingBit(uint32_t LPC_INT)

Clear the specified LPC interrupt pending bit.

Example usage

void lpc_demo(void)
{
    LPC_ClearINTPendingBit(LPC_INT_LPCOMP_CNT);
}

Parameters:

LPC_INT – [in] Specify the LPC interrupt to clear. This parameter can be one of the following values:

LPC_INT_LPCOMP_CNT: Counter comparator interrupt.

Returns:

None.

void LPC_32k_Off_Output_En(FunctionalState NewState)

Enable or disable lpcomp out to NVIC and power sequence.

Parameters:: NewState – [in] This parameter can be ENABLE or DISABLE.
Returns:: None.

uint16_t LPC_GetCompValue(void)

Read LPCOMP comparator value.

Example usage

void lpc_demo(void)
{
    uint16_t value = LPC_GetCompValue();
}

Returns:: LPCOMP comparator value.

uint16_t LPC_GetCounter(void)

Read LPC counter value.

Example usage

void lpc_demo(void)
{
    uint16_t counter = LPC_GetCounter();
}

Returns:: LPCOMP counter value.