BlueNRG 2 , MFT (Multi Function Timer) initialized MFT mode 2: dual-input capture mode,
Initialize MFT_Interrupt(MFT1A_IRQn) at HIGH_PRIORITY but program control call interrupt handler at the end of the main function.
void MFT_init()
{
MFT_InitType MFT_structInit;
MFT_structInit.MFT_Mode = MFT_MODE_2;
MFT_structInit.MFT_Prescaler = 0;
MFT_structInit.MFT_Clock1 = MFT_PRESCALED_CLK;
MFT_structInit.MFT_Clock2 = MFT_NO_CLK;
MFT_structInit.MFT_CRA = 0;
MFT_structInit.MFT_CRB = 0;
MFT_Init(MFT1, &MFT_structInit);
MFT_Cmd(MFT1 ,ENABLE);
/* Interrupt Configuration */
MFT_TnEDGES(MFT1, MFT_RISING, MFT_RISING);
MFT1->TNMCTRL_b.TNAEN = ENABLE;
MFT_SetCounter(MFT1, 0xFFFF, 0xFFFF);
MFT_StatusIT(MFT1, MFT_IT_TNA);
MFT_ClearIT(MFT1,MFT1A_IRQn);
}
void NVIC_init()
{
NVIC_InitType NVIC_structInit;
NVIC_structInit.NVIC_IRQChannel = MFT1A_IRQn ;
NVIC_structInit.NVIC_IRQChannelCmd = ENABLE;
NVIC_structInit.NVIC_IRQChannelPreemptionPriority = HIGH_PRIORITY;
NVIC_Init(&NVIC_structInit);
}
int main()
{int main(void)
{
SystemInit();
GPIO_init();
MFT_init();
NVIC_init();
while (1)
{ SET_BIT(GPIO->OEN, GPIO_Pin_8);
GPIO_ResetBits(GPIO_Pin_8);
GPIO->MFTX_b.MFT1_TIMER_A = 0x08;
touch_State = 1;
MFT1->TNCNT1 = 0xFFFF;
MFT1->TNICTRL_b.TNAIEN = ENABLE;
CLEAR_BIT(GPIO->OEN, GPIO_Pin_8); //set pin as input
}
}
