#include "dw_driver.h"
#include "deca_device_api.h"

void Reset_DW1000(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    // Enable GPIO used for DW1000 reset
    GPIO_InitStructure.GPIO_Pin = DW1000_RSTn;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(DW1000_RSTn_GPIO, &GPIO_InitStructure);

    //drive the RSTn pin low
    GPIO_ResetBits(DW1000_RSTn_GPIO, DW1000_RSTn);

    //put the pin back to tri-state ... as input
    GPIO_InitStructure.GPIO_Pin = DW1000_RSTn;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(DW1000_RSTn_GPIO, &GPIO_InitStructure);

    deca_sleep(2);
}

void DW_GPIO_Init(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;
	EXTI_InitTypeDef EXTI_InitStructure;
	
	/* Enable GPIO clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    // Enable GPIO used for DW1000 wakeup
    GPIO_InitStructure.GPIO_Pin = DW1000_WAKEUP;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(DW1000_WAKEUP_GPIO, &GPIO_InitStructure);
	
	// Enable GPIO used for DW1000 IRQ
    GPIO_InitStructure.GPIO_Pin = DW1000_IRQ;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //IRQ pin should be Pull Down to prevent unnecessary EXT IRQ while DW1000 goes to sleep mode
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(DW1000_IRQ_GPIO, &GPIO_InitStructure);
	
	// Connect EXTI Line to GPIO Pin
    GPIO_EXTILineConfig(DECAIRQ_EXTI_PORT, DECAIRQ_EXTI_PIN);
	
	// Configure EXTI line
    EXTI_InitStructure.EXTI_Line = DECAIRQ_EXTI;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;	//MPW3 IRQ polarity is high by default
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);

}

//¶ÁÈ¡ÍⲿÖжÏ״̬
ITStatus Get_Ext_IRQ_Statues(void)
{
	return EXTI_GetITStatus(DECAIRQ_EXTI);
}


//ʹÄÜÍⲿÖжÏ
void Enable_Ext_IRQ(void)
{
	NVIC_EnableIRQ(DECAIRQ_EXTI_IRQn);
}

//½ûÖ¹ÍⲿÖжÏ
void Disable_Ext_IRQ(void)
{
	NVIC_DisableIRQ(DECAIRQ_EXTI_IRQn);
}

/*! ------------------------------------------------------------------------------------------------------------------
 * Function: decamutexon()
 *
 * Description: This function should disable interrupts. This is called at the start of a critical section
 * It returns the irq state before disable, this value is used to re-enable in decamutexoff call
 *
 * Note: The body of this function is defined in deca_mutex.c and is platform specific
 *
 * input parameters:
 *
 * output parameters
 *
 * returns the state of the DW1000 interrupt
 */
decaIrqStatus_t decamutexon(void)
{
    decaIrqStatus_t s = Get_Ext_IRQ_Statues();

    if(s)
    {
        Disable_Ext_IRQ(); //disable the external interrupt line
    }
    return s ;   // return state before disable, value is used to re-enable in decamutexoff call
}

/*! ------------------------------------------------------------------------------------------------------------------
 * Function: decamutexoff()
 *
 * Description: This function should re-enable interrupts, or at least restore their state as returned(&saved) by decamutexon
 * This is called at the end of a critical section
 *
 * Note: The body of this function is defined in deca_mutex.c and is platform specific
 *
 * input parameters:
 * @param s - the state of the DW1000 interrupt as returned by decamutexon
 *
 * output parameters
 *
 * returns the state of the DW1000 interrupt
 */
void decamutexoff(decaIrqStatus_t s)        // put a function here that re-enables the interrupt at the end of the critical section
{
    if(s)   //need to check the port state as we can't use level sensitive interrupt on the STM ARM
    {
        Enable_Ext_IRQ();
    }
}