Using the CY8C24423A I am trying to use the falling edge of a pulse to wake-up the device, do some ADC, then go back to sleep... wake up on the next falling edge etc and repeat....     

I read in the Cypress Datasheet for my part that the system can only wake up from: GPIO Ints, supply mon. int., analog column int, and timer clocked EXTERNALLY or from 32KHz clock.     

My timer that I am using is clocked from the incoming pulse train (variable)... I have a hardware reset that causes a GPIO interrupt and I have seen that work by toggling an LED (sleep and non-sleep), but whenever I put the device to sleep and expect to see the LED go high on the falling edges of the incomming pulse it's not there. When I don't put the system to sleep I can see my LED go high as expected...     

Is what I am doing possible? I'm not sure if there is some assembly I might have to change to make this work... has anyone else had to do something similar?     

I haven’t been real specific in my application, except that I need to do ADC on the low portion of a pulse and then go back to sleep. Maybe there is a better way to do this…     

Any help will be appreciated.

I'm trying to make use of I2CHW module, i order to modify comparator hyst parameter.
For testing only I put control value in I2cregs.cSTR[4] to see what is going on.
I figured out that code puts the value which is not entered.

I mean that under I2CRegs.cStr[4] appears value 0x70 after I2Cconversation

w 04+ 00+ 10+ 10+ 10+ 10+ 10+ p
r 04+ 00+ 70+ 00+ 00+ 10+ 10+ 00+ p
w 04+ 01+ 10+ 10+ 10+ 10+ 10+ p
r 04+ 10+ 70+ 00+ 00+ 10+ 70+ 00+ p

Please ommit  00 twice after 70. it's from the rest of the code

Below is the code which runs in the loop:
"
volatile unsigned char histCurrent = 0x70;
void I2C(void)
{
BYTE status;
status = I2CHW_bReadI2CStatus();
        /* Wait to read data from the master */
        if( status & I2CHW_WR_COMPLETE ){
         /* Data received - clear the Write status */
            I2CHW_ClrWrStatus();
            /* Reset the pointer for the next read data */
            I2CHW_InitWrite((BYTE*)&I2CRegs,BS);

            if(I2CRegs.bCmd == 0x01)
            {
             switch (I2CRegs.cStr[0])
             {
             case COMP_REF0_937:
             case COMP_REF0_875:
             case COMP_REF0_812:
             case COMP_REF0_750:
             case COMP_REF0_688:
             case COMP_REF0_625:
             case COMP_REF0_562:
             case COMP_REF0_500:
             case COMP_REF0_437:
             case COMP_REF0_375:
             case COMP_REF0_312:
             case COMP_REF0_250:
             case COMP_REF0_188:
             case COMP_REF0_125:
             case COMP_REF0_062:
             case COMP_REF0_042:
             case COMP_REF0_021:
             histCurrent = I2CRegs.cStr[0] ;
             I2CRegs.cStr[4] = I2CRegs.cStr[0];
             break;
             default:
             histCurrent = COMP_REF0_500;
             I2CRegs.cStr[4] = I2CRegs.cStr[0];
             break;
             }
               
            COMP_SetHyst(histCurrent);
            I2CRegs.bCmd = 0x10;
            }else I2CRegs.bCmd = 0;
       
        }
        if( status & I2CHW_RD_COMPLETE )
        {
                    /* Data echoed - clear the read status */
            I2CHW_ClrRdStatus();
            /* Reset the pointer for the next data to echo */
            I2CHW_InitRamRead((BYTE*)&I2CRegs,BS);
        }
}"
 

Hi,

Is it possible to edit existing components? I would really like to implement an analog multiplexer which takes a clock input, so that it can change channel automatically.

Thanks

Hugo