Anyone know how to read a digital input pin?

 Wavform of signal applied to pins

 I finally have the digital inputs working. Now just need to figure out how to make one of them an interrupt in firmware.

For my 3 pins on Port 4;

    CY_SYS_PINS_SET_DRIVE_MODE(CYREG_PRT4_PC,0,CY_SYS_PINS_DM_DIG_HIZ);     

    CY_SYS_PINS_SET_DRIVE_MODE(CYREG_PRT4_PC,1,CY_SYS_PINS_DM_DIG_HIZ);     

    CY_SYS_PINS_SET_DRIVE_MODE(CYREG_PRT4_PC,2,CY_SYS_PINS_DM_DIG_HIZ);     

    CyGlobalIntEnable;     

    for(;;){

        WakePin = CY_SYS_PINS_READ_PIN(CYREG_PRT4_PS,2);     

        if(WakePin){     

          SampleLFData();

        }

 Bob,

How did you read the digital inputs? I tried all sorts of combinations an eventually only managed to get them working using the read pins code shown in my last post.

As I do not now have the pin components on the scematic, I am not sure how to set up an interrupt for the pins entirely in firmware?

I presume I need to use some API call to set the pin (say p4.2) as an input and then define an interrupt for it and us ethe startex?

 Bob,

So, for PSCO4 port 4 port pins, you need to read the entire port and then check the pin states of interest. Rather than doing a bitwise read per pin? 

ie.

PortState = MYPORT_Read()

if(PortState & 0x01){

//P4.0 is high

}

Then if I want interrupt, I add isr for the entire port and look at which pin caused int in the handler routine? (I want to sleep the device and only wake up on a particulr pin going high).