FTM and DMA interrupt seem to be triggering continuously

#include <DMAchannel.h>

FASTRUN void INT_ISR() {
	// check timer overflow
	if ((FTM1_SC & FTM_SC_TOF) != 0) { //read the timer overflow flag (TOF in FTM1_SC)
		FTM1_SC &= ~FTM_SC_TOF; //if set, clear overflow flag
		ftmCounterOVF++; //increment overflow counter
	}
	if ((FTM1_C1SC & FTM_CSC_CHF) != 0) { //look for CH1 event flag
		FTM1_C1SC &= ~FTM_CSC_CHF; //clear CH1 event flag
	}
	timerOvfBuffer= ftmCounterOVF;
	timerCounterBuffer = ftmCounterVal;
	Serial.print(timerOvfBuffer);
	Serial.print(" ");
	Serial.println(timerCounterBuffer);
}

void setup() {
	// configure FTM1
	FTM1_MODE = 0x05; //set write-protect disable (WPDIS) bit to modify other registers
	FTM1_SC = 0x00; //set status/control to zero = disable all internal clock sources
	FTM1_MOD = 0xFFFF; // overflow when maximum value reached
	FTM1_C1SC = 0x45; // CHF=0, CHIE=1 (has to be enabled for DMA), MSB=0, MSA=0, ELSB=0 ELSA=1 (input capture - rising edge), 0, DMA=1	
	// configure pins
	PORTB_PCR0 |= 0x600; //MUX = alternative function 6 on PTB0 (FTM1_QD_PHA)
	PORTA_PCR13 |= 0x700; //MUX = alternative function 7 on PTA13 (FTM1_QD_PHB)
	PORTB_PCR1 |= 0x300; //MUX = alternative function 3 on PTB1 (FTM1_CH1)
	// set to quadrature mode
	FTM1_QDCTRL = 0x0F; // count up on rising edge when PHB is high, see pg. 1186
	// reset counter values
	ftmCounterOVF = 0;
	FTM1_CNT = 0x0000; //reset count to zero
	// configure DMA channel to move timer value
	dma.source(*(uint32_t*)&(FTM1_C1V));
	dma.destination(*(uint16_t*)&(ftmCounterVal));
	dma.transferSize(2);
	dma.transferCount(1);
	dma.interruptAtCompletion();
	dma.attachInterrupt(INT_ISR);
	dma.triggerAtHardwareEvent(DMAMUX_SOURCE_FTM1_CH1);
	dma.enable();
}

/*
	Test FTM input capture interrupt
	pin 11 (input) -> pin 17 (FTM)
*/

#include <DMAChannel.h>

static DMAChannel dma;
volatile uint16_t ftmCounterOVF = 0;
volatile uint16_t ftmCounterVal = 0;

void INT_ISR() {
	Serial.println("Got here!");
	//DMA_CINT = DMA_CINT_CAIR; // clear all dma int
	dma.clearInterrupt();
}

void setup()
{
	Serial.begin(115200);
	delay(5000);
	Serial.println("Starting...");
	
	// setting up pins
	pinMode(11, OUTPUT);
	digitalWriteFast(11, 0);
	
	// *** set up timer for counting square wave ***
	// configure FTM1
	FTM1_MODE = 0x05; //set write-protect disable (WPDIS) bit to modify other registers
	FTM1_SC = 0x00; //set status/control to zero = disable all internal clock sources
	FTM1_MOD = 0xFFFF; // overflow when maximum value reached
	FTM1_C1SC = 0x45; // CHF=0, CHIE=1 (has to be enabled for DMA), MSB=0, MSA=0, ELSB=0 ELSA=1 (input capture - rising edge), 0, DMA=1
	// configure pins
	PORTB_PCR0 |= 0x600; //MUX = alternative function 6 on PTB0 (FTM1_QD_PHA)
	PORTA_PCR13 |= 0x700; //MUX = alternative function 7 on PTA13 (FTM1_QD_PHB)
	PORTB_PCR1 |= 0x300; //MUX = alternative function 3 on PTB1 (FTM1_CH1)
	// set to quadrature mode
	FTM1_QDCTRL = 0x0F; // count up on rising edge when PHB is high, see pg. 1186
	// reset counter values
	ftmCounterOVF = 0;
	FTM1_CNT = 0x0000; //reset count to zero
	// configure DMA channel to move timer value
	dma.source(*(uint32_t*)&(FTM1_C1V));
	dma.destination(*(uint16_t*)&(ftmCounterVal));
	dma.transferSize(2);
	dma.transferCount(1);
	dma.attachInterrupt(INT_ISR);
	dma.interruptAtCompletion();
	dma.triggerAtHardwareEvent(DMAMUX_SOURCE_FTM1_CH1);
	dma.enable();
	
	// Try input capture
	digitalWriteFast(11, 1);
	//dma.triggerManual();
	Serial.print(dma.complete());
	Serial.print(" ");
	Serial.println(ftmCounterVal);
	delay(1000);
	Serial.print(dma.complete());
	Serial.print(" ");
	Serial.println(ftmCounterVal); // need to connect another signal source to pin 4 and 16
}

void loop()
{

}