//set GPIO0[19] as timer5_io_mux
MUX_VAL(PINCNTL48, (IEN | IPD | FCN7 )) /* TIMER5_IO_MUX */\
MUX_VAL(PINCNTL128, (IEN | IPD | FCN8 )) /* TIMER5_IO_MUX_DISABLE */\
MUX_VAL(PINCNTL7, (IEN | IPD | FCN1 )) /* TIMER5_IO_MUX_DISABLE */\
MUX_VAL(PINCNTL112, (IEN | IPD | FCN8 )) /* TIMER5_IO_MUX_DISABLE */\
//set timer5_io_mux input
volatile uint32_t GPIO0_OE = 0x48032134;
ulTemp = *(uint32_t*)(GPIO0_OE);
delete setting the timer5_io_mux input code above ,the case is same.
//init timer 5 as below
// enable wakeup
TIMER_IRQWAKEEN = 0x4;
// enable the tcar interrupt
TIMER_IRQENABLE_SET = 0x4;
// capture second events , falling edge ,AR, start timer
TCLR = 0x2203;
also, i print the register value of timer5
find information below:
the TRCC value changes continuous,it looks like the timers is working .
when the value reach 0xffffffff, the flag of overflow in register TIMER5_IRQSTATUS_RAW is set .
the overflow interrupt happens ,but i don't enable the overflow interrupt.
input Vp = 1.5V pulse ,but no interrupt happend.
if input Vp > 1.8V pulse ,the system hang .
i want to know the capture trigger voltage ?
why the capture interrupt can't be trigger?
anybody can help me ? thanks.
